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Llandaff 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Llandaff

Glamorgan, United Kingdom

Long range weather outlook for Llandaff includes 14 day forecast summary:

Over the next 14 days the Llandaff forecast suggests the average daytime maximum temperature will be around 11°C, with a high for the two weeks of 14°C expected on the afternoon of Monday 24th. The average minimum temperature will be 9°C, dipping to its lowest on the morning of Thursday 27th at 4°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. It looks like Tuesday 18th will have the most precipitation with an accumulation of around 16.0mm. On the whole winds are likely to be moderate. The strongest wind will be experienced on the morning of Tuesday 18th, coming from a southerly direction, and reaching around 33mph.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Tue 18
Dec
15:00

SSW
SSW

21 / 24 mph 53 / 47°F 90% 1000 mb
Low level cloud: 97%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.25 In of precipitation over the past 3 hours.
0.25 In
18:00

SW
SW

14 / 17 mph 52 / 47°F 83% 1000 mb
Low level cloud: 27%
Mid level cloud: 100%
High level cloud: 39%
Most Significant Cloud Type: medium
100%
Expect 0.11 In of precipitation over the past 3 hours.
0.11 In
21:00

SW
SW

15 / 21 mph 51 / 45°F 81% 1002 mb
Low level cloud: 39%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
49%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
Wed 19
Dec
00:00

SW
SW

15 / 26 mph 48 / 42°F 81% 1003 mb
Low level cloud: 10%
Mid level cloud: 65%
High level cloud: 1%
Most Significant Cloud Type: medium
92%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
03:00

SW
SW

15 / 26 mph 47 / 41°F 80% 1002 mb
Low level cloud: 0%
Mid level cloud: 80%
High level cloud: 100%
Most Significant Cloud Type: medium
83%
Expect 0.09 In of precipitation over the past 3 hours.
0.09 In
06:00

WSW
WSW

13 / 23 mph 47 / 41°F 78% 1003 mb
Low level cloud: 3%
Mid level cloud: 81%
High level cloud: 100%
Most Significant Cloud Type: medium
91%
Expect 0.09 In of precipitation over the past 3 hours.
0.09 In
09:00

SW
SW

15 / 22 mph 48 / 42°F 78% 1004 mb
Low level cloud: 30%
Mid level cloud: 29%
High level cloud: 3%
Most Significant Cloud Type: low
40%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
12:00

SW
SW

18 / 25 mph 49 / 42°F 75% 1004 mb
Low level cloud: 24%
Mid level cloud: 55%
High level cloud: 100%
Most Significant Cloud Type: low
54%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

SW
SW

21 / 27 mph 49 / 43°F 75% 1003 mb
Low level cloud: 38%
Mid level cloud: 78%
High level cloud: 99%
Most Significant Cloud Type: low
77%
Expect 0.04 In of precipitation over the past 3 hours.
0.04 In
18:00

SW
SW

22 / 30 mph 49 / 42°F 78% 1003 mb
Low level cloud: 74%
Mid level cloud: 78%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.08 In of precipitation over the past 3 hours.
0.08 In
21:00

WSW
WSW

20 / 30 mph 48 / 41°F 76% 1003 mb
Low level cloud: 32%
Mid level cloud: 75%
High level cloud: 99%
Most Significant Cloud Type: low
70%
Expect 0.05 In of precipitation over the past 3 hours.
0.05 In
Thu 20
Dec
00:00

WSW
WSW

21 / 30 mph 50 / 44°F 75% 1004 mb
Low level cloud: 58%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
86%
Expect 0.07 In of precipitation over the past 3 hours.
0.07 In
03:00

W
W

23 / 36 mph 49 / 42°F 76% 1005 mb
Low level cloud: 21%
Mid level cloud: 61%
High level cloud: 17%
Most Significant Cloud Type: medium
100%
Expect 0.04 In of precipitation over the past 3 hours.
0.04 In
06:00

W
W

21 / 36 mph 48 / 41°F 77% 1007 mb
Low level cloud: 24%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
31%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
09:00

W
W

17 / 23 mph 50 / 44°F 76% 1009 mb
Low level cloud: 10%
Mid level cloud: 43%
High level cloud: 7%
Most Significant Cloud Type: medium
72%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
12:00

WSW
WSW

19 / 25 mph 53 / 47°F 74% 1010 mb
Low level cloud: 61%
Mid level cloud: 46%
High level cloud: 9%
Most Significant Cloud Type: low
78%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
15:00

WSW
WSW

21 / 25 mph 54 / 48°F 75% 1010 mb
Low level cloud: 73%
Mid level cloud: 46%
High level cloud: 72%
Most Significant Cloud Type: low
97%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
18:00

SW
SW

13 / 15 mph 53 / 49°F 81% 1009 mb
Low level cloud: 90%
Mid level cloud: 73%
High level cloud: 75%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

S
S

14 / 23 mph 51 / 46°F 92% 1006 mb
Low level cloud: 92%
Mid level cloud: 74%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
Fri 21
Dec
00:00

SSW
SSW

19 / 36 mph 52 / 46°F 92% 1001 mb
Low level cloud: 95%
Mid level cloud: 100%
High level cloud: 85%
Most Significant Cloud Type: low
100%
Expect 0.18 In of precipitation over the past 3 hours.
0.18 In
03:00

WSW
WSW

26 / 54 mph 50 / 43°F 92% 998 mb
Low level cloud: 90%
Mid level cloud: 80%
High level cloud: 93%
Most Significant Cloud Type: low
100%
Expect 0.22 In of precipitation over the past 3 hours.
0.22 In
06:00

W
W

29 / 55 mph 50 / 42°F 80% 1000 mb
Low level cloud: 47%
Mid level cloud: 62%
High level cloud: 0%
Most Significant Cloud Type: low
68%
Expect 0.11 In of precipitation over the past 3 hours.
0.11 In
09:00

W
W

28 / 34 mph 52 / 45°F 73% 1004 mb
Low level cloud: 85%
Mid level cloud: 3%
High level cloud: 5%
Most Significant Cloud Type: low
86%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

W
W

29 / 33 mph 55 / 49°F 70% 1006 mb
Low level cloud: 50%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
53%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

W
W

27 / 31 mph 56 / 51°F 72% 1008 mb
Low level cloud: 22%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
32%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

WSW
WSW

28 / 32 mph 55 / 49°F 78% 1009 mb
Low level cloud: 57%
Mid level cloud: 10%
High level cloud: 54%
Most Significant Cloud Type: low
66%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:00

SW
SW

21 / 29 mph 53 / 47°F 77% 1007 mb
Low level cloud: 11%
Mid level cloud: 46%
High level cloud: 56%
Most Significant Cloud Type: medium
79%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
Sat 22
Dec
00:00

WSW
WSW

30 / 58 mph 50 / 42°F 81% 1006 mb
Low level cloud: 53%
Mid level cloud: 8%
High level cloud: 71%
Most Significant Cloud Type: low
64%
Expect 0.11 In of precipitation over the past 3 hours.
0.11 In
03:00

W
W

30 / 57 mph 49 / 40°F 75% 1007 mb
Low level cloud: 49%
Mid level cloud: 14%
High level cloud: 5%
Most Significant Cloud Type: low
54%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
06:00

W
W

27 / 49 mph 48 / 40°F 75% 1009 mb
Low level cloud: 18%
Mid level cloud: 21%
High level cloud: 31%
Most Significant Cloud Type: low
29%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
09:00

W
W

23 / 34 mph 50 / 43°F 73% 1012 mb
Low level cloud: 8%
Mid level cloud: 8%
High level cloud: 74%
Most Significant Cloud Type: medium
33%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

W
W

22 / 26 mph 52 / 46°F 70% 1014 mb
Low level cloud: 4%
Mid level cloud: 13%
High level cloud: 21%
Most Significant Cloud Type: medium
25%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

W
W

19 / 22 mph 53 / 48°F 70% 1015 mb
Low level cloud: 4%
Mid level cloud: 7%
High level cloud: 77%
Most Significant Cloud Type: medium
20%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

W
W

16 / 18 mph 52 / 47°F 74% 1017 mb
Low level cloud: 22%
Mid level cloud: 22%
High level cloud: 81%
Most Significant Cloud Type: low
39%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:00

W
W

15 / 20 mph 51 / 46°F 73% 1019 mb
Low level cloud: 5%
Mid level cloud: 17%
High level cloud: 32%
Most Significant Cloud Type: medium
33%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Sun 23
Dec
00:00

WSW
WSW

11 / 15 mph 51 / 47°F 80% 1020 mb
Low level cloud: 41%
Mid level cloud: 7%
High level cloud: 93%
Most Significant Cloud Type: low
55%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

SSW
SSW

10 / 14 mph 49 / 45°F 85% 1020 mb
Low level cloud: 2%
Mid level cloud: 11%
High level cloud: 92%
Most Significant Cloud Type: medium
20%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

S
S

10 / 17 mph 48 / 44°F 88% 1019 mb
Low level cloud: 8%
Mid level cloud: 77%
High level cloud: 80%
Most Significant Cloud Type: medium
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

SSE
SSE

14 / 17 mph 51 / 46°F 90% 1018 mb
Low level cloud: 78%
Mid level cloud: 70%
High level cloud: 84%
Most Significant Cloud Type: low
100%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
12:00

SE
SE

17 / 20 mph 54 / 50°F 92% 1016 mb
Low level cloud: 97%
Mid level cloud: 80%
High level cloud: 57%
Most Significant Cloud Type: low
100%
Expect 0.06 In of precipitation over the past 3 hours.
0.06 In
15:00

SW
SW

13 / 19 mph 56 / 52°F 94% 1013 mb
Low level cloud: 89%
Mid level cloud: 74%
High level cloud: 17%
Most Significant Cloud Type: low
100%
Expect 0.09 In of precipitation over the past 3 hours.
0.09 In
18:00

SW
SW

21 / 36 mph 54 / 49°F 89% 1013 mb
Low level cloud: 75%
Mid level cloud: 72%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
21:00

SW
SW

19 / 34 mph 52 / 46°F 90% 1014 mb
Low level cloud: 90%
Mid level cloud: 78%
High level cloud: 75%
Most Significant Cloud Type: low
100%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
Mon 24
Dec
00:00

SW
SW

19 / 28 mph 55 / 50°F 90% 1014 mb
Low level cloud: 91%
Mid level cloud: 41%
High level cloud: 75%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
03:00

SW
SW

16 / 25 mph 54 / 50°F 90% 1013 mb
Low level cloud: 83%
Mid level cloud: 45%
High level cloud: 77%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

SW
SW

17 / 29 mph 54 / 49°F 90% 1013 mb
Low level cloud: 91%
Mid level cloud: 62%
High level cloud: 80%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
09:00

SW
SW

16 / 25 mph 55 / 51°F 91% 1014 mb
Low level cloud: 90%
Mid level cloud: 30%
High level cloud: 80%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

SW
SW

17 / 27 mph 56 / 52°F 87% 1014 mb
Low level cloud: 94%
Mid level cloud: 46%
High level cloud: 77%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

SSW
SSW

17 / 24 mph 57 / 53°F 88% 1014 mb
Low level cloud: 90%
Mid level cloud: 25%
High level cloud: 75%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

SSW
SSW

17 / 26 mph 56 / 52°F 89% 1014 mb
Low level cloud: 90%
Mid level cloud: 45%
High level cloud: 77%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

SSW
SSW

19 / 30 mph 55 / 51°F 88% 1015 mb
Low level cloud: 68%
Mid level cloud: 28%
High level cloud: 79%
Most Significant Cloud Type: low
87%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Tue 25
Dec
00:00

NW
NW

17 / 31 mph 45 / 38°F 80% 1014 mb
Low level cloud: 12%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
21%
0.00 In
06:00

NW
NW

16 / 26 mph 44 / 37°F 76% 1030 mb
Low level cloud: 1%
Mid level cloud: 6%
High level cloud: 72%
Most Significant Cloud Type: medium
10%
0.00 In
12:00

WNW
WNW

14 / 21 mph 47 / 42°F 75% 1033 mb
Low level cloud: 9%
Mid level cloud: 32%
High level cloud: 32%
Most Significant Cloud Type: medium
57%
0.00 In
18:00

W
W

18 / 27 mph 50 / 44°F 80% 1028 mb
Low level cloud: 53%
Mid level cloud: 13%
High level cloud: 97%
Most Significant Cloud Type: low
68%
0.00 In
Wed 26
Dec
00:00

WNW
WNW

7 / 11 mph 46 / 42°F 85% 1035 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 18%
Most Significant Cloud Type: medium
23%
0.00 In
06:00

WNW
WNW

12 / 21 mph 47 / 41°F 81% 1033 mb
Low level cloud: 26%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
30%
0.00 In
12:00

ENE
ENE

2 / 3 mph 52 / 53°F 82% 1015 mb
Low level cloud: 36%
Mid level cloud: 12%
High level cloud: 32%
Most Significant Cloud Type: low
43%
0.00 In
18:00

NE
NE

13 / 14 mph 48 / 42°F 80% 1019 mb
Low level cloud: 80%
Mid level cloud: 30%
High level cloud: 44%
Most Significant Cloud Type: low
95%
0.00 In
Thu 27
Dec
00:00

ESE
ESE

8 / 12 mph 47 / 43°F 92% 1021 mb
Low level cloud: 86%
Mid level cloud: 25%
High level cloud: 5%
Most Significant Cloud Type: low
95%
0.00 In
06:00

ENE
ENE

7 / 9 mph 42 / 37°F 89% 1024 mb
Low level cloud: 12%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
13%
0.00 In
12:00

SSE
SSE

8 / 11 mph 50 / 47°F 90% 1023 mb
Low level cloud: 62%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: low
62%
0.00 In
18:00

SE
SE

11 / 15 mph 43 / 37°F 87% 1021 mb
Low level cloud: 17%
Mid level cloud: 5%
High level cloud: 83%
Most Significant Cloud Type: low
28%
0.00 In
Fri 28
Dec
00:00

S
S

12 / 24 mph 47 / 41°F 91% 1021 mb
Low level cloud: 89%
Mid level cloud: 47%
High level cloud: 95%
Most Significant Cloud Type: low
100%
0.01 In
06:00

ESE
ESE

6 / 10 mph 47 / 44°F 95% 1019 mb
Low level cloud: 86%
Mid level cloud: 10%
High level cloud: 22%
Most Significant Cloud Type: low
92%
0.11 In
12:00

W
W

13 / 18 mph 49 / 44°F 76% 1025 mb
Low level cloud: 1%
Mid level cloud: 13%
High level cloud: 40%
Most Significant Cloud Type: medium
17%
0.05 In
18:00

N
N

14 / 17 mph 48 / 43°F 87% 1024 mb
Low level cloud: 76%
Mid level cloud: 45%
High level cloud: 42%
Most Significant Cloud Type: low
97%
0.02 In
Sat 29
Dec
00:00

SSW
SSW

16 / 24 mph 47 / 41°F 84% 1024 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 37%
Most Significant Cloud Type: medium
45%
0.00 In
06:00

NNW
NNW

11 / 21 mph 39 / 32°F 81% 1032 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 34%
Most Significant Cloud Type: medium
5%
0.00 In
12:00

WSW
WSW

12 / 17 mph 53 / 49°F 86% 1023 mb
Low level cloud: 6%
Mid level cloud: 6%
High level cloud: 16%
Most Significant Cloud Type: low
9%
0.04 In
18:00

W
W

7 / 12 mph 43 / 39°F 78% 1036 mb
Low level cloud: 0%
Mid level cloud: 60%
High level cloud: 8%
Most Significant Cloud Type: medium
59%
0.00 In
Sun 30
Dec
00:00

WSW
WSW

20 / 41 mph 51 / 45°F 91% 1023 mb
Low level cloud: 64%
Mid level cloud: 45%
High level cloud: 3%
Most Significant Cloud Type: low
80%
0.02 In
06:00

WSW
WSW

11 / 23 mph 42 / 36°F 90% 1037 mb
Low level cloud: 49%
Mid level cloud: 44%
High level cloud: 45%
Most Significant Cloud Type: low
70%
0.00 In
12:00

WSW
WSW

20 / 27 mph 53 / 48°F 85% 1025 mb
Low level cloud: 49%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: low
49%
0.03 In
18:00

W
W

9 / 10 mph 51 / 48°F 91% 1039 mb
Low level cloud: 20%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: low
20%
0.00 In
Mon 31
Dec
00:00

SW
SW

19 / 29 mph 54 / 49°F 89% 1023 mb
Low level cloud: 11%
Mid level cloud: 1%
High level cloud: 59%
Most Significant Cloud Type: low
18%
0.01 In
06:00

WNW
WNW

6 / 12 mph 43 / 39°F 91% 1041 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
9%
0.00 In
12:00

WSW
WSW

22 / 29 mph 56 / 51°F 89% 1022 mb
Low level cloud: 73%
Mid level cloud: 10%
High level cloud: 36%
Most Significant Cloud Type: low
80%
0.03 In
18:00

NNE
NNE

4 / 4 mph 53 / 52°F 69% 1044 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 34%
Most Significant Cloud Type: high
34%
0.00 In
Tue 01
Jan
00:00

WSW
WSW

22 / 33 mph 53 / 47°F 87% 1021 mb
Low level cloud: 69%
Mid level cloud: 5%
High level cloud: 38%
Most Significant Cloud Type: low
75%
0.02 In
06:00

NE
NE

6 / 12 mph 39 / 34°F 63% 1045 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 39%
Most Significant Cloud Type: high
38%
0.00 In
12:00

WNW
WNW

26 / 32 mph 48 / 39°F 68% 1024 mb
Low level cloud: 29%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: low
43%
0.03 In
18:00

NE
NE

9 / 11 mph 49 / 45°F 82% 1045 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 3%
Most Significant Cloud Type: medium
8%
0.00 In
Wed 02
Jan
00:00

WNW
WNW

16 / 24 mph 43 / 36°F 69% 1028 mb
Low level cloud: 15%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
88%
0.01 In
06:00

ENE
ENE

12 / 24 mph 39 / 32°F 94% 1044 mb
Low level cloud: 55%
Mid level cloud: 5%
High level cloud: 10%
Most Significant Cloud Type: low
58%
0.01 In
12:00

NW
NW

18 / 24 mph 45 / 38°F 71% 1027 mb
Low level cloud: 44%
Mid level cloud: 25%
High level cloud: 38%
Most Significant Cloud Type: low
57%
0.01 In
18:00

NE
NE

11 / 13 mph 49 / 44°F 87% 1044 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 1%
Most Significant Cloud Type: medium
3%
0.00 In

The day label given represents the local day relative to the local time for the location you are looking at.
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Day

This time is corrected for local time zones and where possible for daylight saving times.
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Local Time

The wind direction we use on this page is the direction the wind is coming from, given in a 16 point compass format.
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Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
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Speed/
Gust

Temperature from our forecast perspective are fairly well defined, they are what we would expect to measure in a standard meteorological screen (in other words, shaded and well ventilated) at 2 metres above ground level.
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Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
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Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
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Precip Amount

The total amount of cloud as a percentage is derived from looking at cloud cover throughout the atmosphere and estimating how these combine when looked at from the ground.
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Cloud Amount

Here we try to capture the feel of the weather as an image – it will never be perfect but is useful for a quick overview.
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Weather

When we measure for forecast air pressure we are normally doing this relative to a certain height and most commonly relative to Mean Sea Level.
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Pressure