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Graig-Fawr 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Graig-Fawr

Carmarthenshire, United Kingdom

Long range weather outlook for Graig-Fawr includes 14 day forecast summary:

Reviewing the forecast for Graig-Fawr Over the next 14 days and the average daytime maximum temperature will be around 11°C, with a high for the two weeks of 13°C expected on the afternoon of Sunday 23rd. The mean minimum temperature will be 8°C, dipping to its lowest on the morning of Tuesday 25th at 7°C. Expect the following 14 days ahead to have some days seeing a little precipitation and some days with rain. Predictions are Tuesday 18th will have the most precipitation with an accumulation of around 29.0mm. 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 31mph.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Mon 17
Dec
15:00

SSW
SSW

20 / 26 mph 53 / 48°F 85% 1013 mb
Low level cloud: 91%
Mid level cloud: 76%
High level cloud: 94%
Most Significant Cloud Type: low
100%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
18:00

SSW
SSW

21 / 34 mph 52 / 46°F 86% 1013 mb
Low level cloud: 89%
Mid level cloud: 26%
High level cloud: 36%
Most Significant Cloud Type: low
100%
Expect 0.04 In of precipitation over the past 3 hours.
0.04 In
21:00

S
S

23 / 46 mph 49 / 42°F 86% 1012 mb
Low level cloud: 90%
Mid level cloud: 39%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
Tue 18
Dec
00:00

S
S

26 / 53 mph 49 / 42°F 84% 1010 mb
Low level cloud: 89%
Mid level cloud: 43%
High level cloud: 63%
Most Significant Cloud Type: low
100%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
03:00

S
S

29 / 60 mph 48 / 39°F 84% 1007 mb
Low level cloud: 89%
Mid level cloud: 53%
High level cloud: 68%
Most Significant Cloud Type: low
100%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
06:00

S
S

32 / 66 mph 47 / 37°F 78% 1003 mb
Low level cloud: 83%
Mid level cloud: 67%
High level cloud: 86%
Most Significant Cloud Type: low
100%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
09:00

SSE
SSE

32 / 50 mph 49 / 41°F 83% 1000 mb
Low level cloud: 90%
Mid level cloud: 94%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.21 In of precipitation over the past 3 hours.
0.21 In
12:00

S
S

32 / 43 mph 52 / 45°F 85% 998 mb
Low level cloud: 96%
Mid level cloud: 95%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.33 In of precipitation over the past 3 hours.
0.33 In
15:00

W
W

14 / 16 mph 54 / 50°F 92% 998 mb
Low level cloud: 85%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.39 In of precipitation over the past 3 hours.
0.39 In
18:00

SW
SW

14 / 17 mph 52 / 48°F 88% 999 mb
Low level cloud: 51%
Mid level cloud: 86%
High level cloud: 92%
Most Significant Cloud Type: low
92%
Expect 0.12 In of precipitation over the past 3 hours.
0.12 In
21:00

SW
SW

13 / 17 mph 50 / 46°F 81% 1001 mb
Low level cloud: 27%
Mid level cloud: 50%
High level cloud: 0%
Most Significant Cloud Type: low
44%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
Wed 19
Dec
00:00

SW
SW

12 / 23 mph 46 / 40°F 82% 1002 mb
Low level cloud: 25%
Mid level cloud: 46%
High level cloud: 22%
Most Significant Cloud Type: low
43%
Expect 0.04 In of precipitation over the past 3 hours.
0.04 In
03:00

WSW
WSW

10 / 18 mph 45 / 40°F 79% 1003 mb
Low level cloud: 14%
Mid level cloud: 24%
High level cloud: 100%
Most Significant Cloud Type: low
34%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
06:00

WSW
WSW

11 / 20 mph 45 / 39°F 78% 1004 mb
Low level cloud: 15%
Mid level cloud: 18%
High level cloud: 15%
Most Significant Cloud Type: low
23%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
09:00

SW
SW

10 / 16 mph 46 / 41°F 77% 1006 mb
Low level cloud: 52%
Mid level cloud: 8%
High level cloud: 3%
Most Significant Cloud Type: low
55%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
12:00

SW
SW

16 / 23 mph 48 / 42°F 73% 1006 mb
Low level cloud: 24%
Mid level cloud: 14%
High level cloud: 99%
Most Significant Cloud Type: low
40%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
15:00

SW
SW

17 / 23 mph 49 / 43°F 74% 1005 mb
Low level cloud: 24%
Mid level cloud: 81%
High level cloud: 75%
Most Significant Cloud Type: medium
100%
Expect 0.06 In of precipitation over the past 3 hours.
0.06 In
18:00

WSW
WSW

13 / 20 mph 48 / 42°F 77% 1005 mb
Low level cloud: 5%
Mid level cloud: 51%
High level cloud: 7%
Most Significant Cloud Type: medium
65%
Expect 0.07 In of precipitation over the past 3 hours.
0.07 In
21:00

WSW
WSW

13 / 21 mph 47 / 41°F 79% 1006 mb
Low level cloud: 17%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
23%
Expect 0.05 In of precipitation over the past 3 hours.
0.05 In
Thu 20
Dec
00:00

WSW
WSW

14 / 23 mph 47 / 41°F 81% 1007 mb
Low level cloud: 16%
Mid level cloud: 64%
High level cloud: 41%
Most Significant Cloud Type: medium
100%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
03:00

WSW
WSW

17 / 30 mph 46 / 39°F 77% 1007 mb
Low level cloud: 20%
Mid level cloud: 68%
High level cloud: 20%
Most Significant Cloud Type: medium
100%
Expect 0.06 In of precipitation over the past 3 hours.
0.06 In
06:00

WSW
WSW

19 / 35 mph 45 / 38°F 78% 1007 mb
Low level cloud: 34%
Mid level cloud: 69%
High level cloud: 56%
Most Significant Cloud Type: low
64%
Expect 0.06 In of precipitation over the past 3 hours.
0.06 In
09:00

WSW
WSW

19 / 32 mph 47 / 40°F 78% 1007 mb
Low level cloud: 29%
Mid level cloud: 78%
High level cloud: 14%
Most Significant Cloud Type: low
57%
Expect 0.07 In of precipitation over the past 3 hours.
0.07 In
12:00

W
W

21 / 31 mph 48 / 41°F 76% 1008 mb
Low level cloud: 17%
Mid level cloud: 74%
High level cloud: 7%
Most Significant Cloud Type: medium
100%
Expect 0.06 In of precipitation over the past 3 hours.
0.06 In
15:00

W
W

16 / 22 mph 49 / 44°F 76% 1008 mb
Low level cloud: 16%
Mid level cloud: 27%
High level cloud: 18%
Most Significant Cloud Type: low
27%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
18:00

W
W

10 / 15 mph 49 / 44°F 79% 1008 mb
Low level cloud: 23%
Mid level cloud: 4%
High level cloud: 79%
Most Significant Cloud Type: low
33%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

SW
SW

4 / 7 mph 47 / 46°F 85% 1008 mb
Low level cloud: 84%
Mid level cloud: 8%
High level cloud: 80%
Most Significant Cloud Type: low
96%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Fri 21
Dec
00:00

SSE
SSE

8 / 13 mph 49 / 45°F 93% 1005 mb
Low level cloud: 87%
Mid level cloud: 45%
High level cloud: 63%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
03:00

S
S

13 / 19 mph 52 / 47°F 96% 1001 mb
Low level cloud: 91%
Mid level cloud: 66%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.13 In of precipitation over the past 3 hours.
0.13 In
06:00

WSW
WSW

27 / 38 mph 55 / 49°F 94% 999 mb
Low level cloud: 93%
Mid level cloud: 48%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.48 In of precipitation over the past 3 hours.
0.48 In
09:00

W
W

22 / 32 mph 49 / 42°F 78% 1003 mb
Low level cloud: 22%
Mid level cloud: 4%
High level cloud: 1%
Most Significant Cloud Type: low
23%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

W
W

19 / 27 mph 51 / 45°F 77% 1006 mb
Low level cloud: 38%
Mid level cloud: 6%
High level cloud: 41%
Most Significant Cloud Type: low
45%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

WSW
WSW

19 / 27 mph 51 / 46°F 81% 1007 mb
Low level cloud: 58%
Mid level cloud: 64%
High level cloud: 95%
Most Significant Cloud Type: low
91%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

SW
SW

20 / 30 mph 51 / 45°F 84% 1008 mb
Low level cloud: 90%
Mid level cloud: 75%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
21:00

W
W

25 / 38 mph 51 / 45°F 84% 1007 mb
Low level cloud: 38%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
41%
Expect 0.10 In of precipitation over the past 3 hours.
0.10 In
Sat 22
Dec
00:00

W
W

21 / 34 mph 49 / 42°F 78% 1010 mb
Low level cloud: 32%
Mid level cloud: 8%
High level cloud: 3%
Most Significant Cloud Type: low
35%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

W
W

17 / 29 mph 48 / 42°F 78% 1012 mb
Low level cloud: 17%
Mid level cloud: 7%
High level cloud: 74%
Most Significant Cloud Type: low
27%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

W
W

12 / 21 mph 47 / 42°F 83% 1014 mb
Low level cloud: 32%
Mid level cloud: 17%
High level cloud: 74%
Most Significant Cloud Type: low
47%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

WSW
WSW

10 / 16 mph 50 / 45°F 88% 1015 mb
Low level cloud: 35%
Mid level cloud: 32%
High level cloud: 90%
Most Significant Cloud Type: low
56%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

WSW
WSW

11 / 15 mph 52 / 48°F 86% 1016 mb
Low level cloud: 55%
Mid level cloud: 10%
High level cloud: 77%
Most Significant Cloud Type: low
67%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

SW
SW

9 / 12 mph 53 / 50°F 90% 1015 mb
Low level cloud: 56%
Mid level cloud: 23%
High level cloud: 77%
Most Significant Cloud Type: low
72%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
18:00

SSW
SSW

9 / 12 mph 52 / 49°F 94% 1015 mb
Low level cloud: 52%
Mid level cloud: 48%
High level cloud: 76%
Most Significant Cloud Type: low
77%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:00

SSW
SSW

12 / 22 mph 50 / 46°F 95% 1015 mb
Low level cloud: 91%
Mid level cloud: 45%
High level cloud: 77%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
Sun 23
Dec
00:00

S
S

14 / 27 mph 51 / 46°F 94% 1013 mb
Low level cloud: 84%
Mid level cloud: 44%
High level cloud: 92%
Most Significant Cloud Type: low
100%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
03:00

SSW
SSW

15 / 32 mph 49 / 44°F 96% 1009 mb
Low level cloud: 91%
Mid level cloud: 84%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.09 In of precipitation over the past 3 hours.
0.09 In
06:00

SSW
SSW

22 / 45 mph 48 / 41°F 95% 1006 mb
Low level cloud: 93%
Mid level cloud: 97%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.21 In of precipitation over the past 3 hours.
0.21 In
09:00

SW
SW

28 / 55 mph 51 / 44°F 93% 1006 mb
Low level cloud: 95%
Mid level cloud: 99%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.25 In of precipitation over the past 3 hours.
0.25 In
12:00

SW
SW

23 / 34 mph 54 / 48°F 94% 1005 mb
Low level cloud: 92%
Mid level cloud: 74%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.20 In of precipitation over the past 3 hours.
0.20 In
15:00

WSW
WSW

14 / 16 mph 55 / 51°F 91% 1004 mb
Low level cloud: 61%
Mid level cloud: 72%
High level cloud: 89%
Most Significant Cloud Type: low
96%
Expect 0.11 In of precipitation over the past 3 hours.
0.11 In
18:00

WSW
WSW

22 / 30 mph 54 / 48°F 86% 1004 mb
Low level cloud: 74%
Mid level cloud: 77%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.11 In of precipitation over the past 3 hours.
0.11 In
21:00

WSW
WSW

15 / 19 mph 52 / 47°F 81% 1005 mb
Low level cloud: 17%
Mid level cloud: 36%
High level cloud: 95%
Most Significant Cloud Type: low
40%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Mon 24
Dec
00:00

W
W

14 / 30 mph 42 / 34°F 78% 1007 mb
Low level cloud: 8%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
11%
0.03 In
06:00

WNW
WNW

14 / 23 mph 44 / 37°F 83% 1007 mb
Low level cloud: 59%
Mid level cloud: 19%
High level cloud: 1%
Most Significant Cloud Type: low
65%
0.00 In
12:00

NW
NW

16 / 24 mph 46 / 39°F 83% 1009 mb
Low level cloud: 83%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
92%
0.01 In
18:00

ENE
ENE

2 / 3 mph 50 / 51°F 83% 1013 mb
Low level cloud: 2%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
35%
0.05 In
Tue 25
Dec
00:00

NW
NW

17 / 32 mph 44 / 37°F 83% 1015 mb
Low level cloud: 77%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
87%
0.02 In
06:00

NW
NW

12 / 21 mph 43 / 36°F 81% 1031 mb
Low level cloud: 25%
Mid level cloud: 4%
High level cloud: 22%
Most Significant Cloud Type: low
29%
0.00 In
12:00

NW
NW

12 / 19 mph 47 / 41°F 78% 1033 mb
Low level cloud: 33%
Mid level cloud: 30%
High level cloud: 82%
Most Significant Cloud Type: low
53%
0.00 In
18:00

W
W

14 / 22 mph 50 / 45°F 86% 1028 mb
Low level cloud: 75%
Mid level cloud: 18%
High level cloud: 92%
Most Significant Cloud Type: low
92%
0.01 In
Wed 26
Dec
00:00

NW
NW

4 / 8 mph 44 / 42°F 87% 1036 mb
Low level cloud: 29%
Mid level cloud: 18%
High level cloud: 15%
Most Significant Cloud Type: low
37%
0.00 In
06:00

W
W

12 / 20 mph 49 / 44°F 90% 1030 mb
Low level cloud: 82%
Mid level cloud: 15%
High level cloud: 53%
Most Significant Cloud Type: low
93%
0.01 In
12:00

S
S

2 / 2 mph 48 / 47°F 83% 1037 mb
Low level cloud: 46%
Mid level cloud: 10%
High level cloud: 34%
Most Significant Cloud Type: low
52%
0.00 In
18:00

WSW
WSW

9 / 13 mph 51 / 47°F 77% 1032 mb
Low level cloud: 80%
Mid level cloud: 3%
High level cloud: 7%
Most Significant Cloud Type: low
82%
0.01 In
Thu 27
Dec
00:00

SW
SW

5 / 10 mph 44 / 41°F 78% 1036 mb
Low level cloud: 89%
Mid level cloud: 8%
High level cloud: 13%
Most Significant Cloud Type: low
93%
0.00 In
06:00

SW
SW

12 / 20 mph 47 / 42°F 84% 1030 mb
Low level cloud: 88%
Mid level cloud: 7%
High level cloud: 38%
Most Significant Cloud Type: low
94%
0.00 In
12:00

SSW
SSW

7 / 11 mph 47 / 43°F 83% 1036 mb
Low level cloud: 49%
Mid level cloud: 3%
High level cloud: 15%
Most Significant Cloud Type: low
52%
0.00 In
18:00

SW
SW

14 / 21 mph 50 / 44°F 87% 1029 mb
Low level cloud: 66%
Mid level cloud: 46%
High level cloud: 38%
Most Significant Cloud Type: low
86%
0.01 In
Fri 28
Dec
00:00

SSE
SSE

6 / 10 mph 43 / 40°F 91% 1035 mb
Low level cloud: 18%
Mid level cloud: 17%
High level cloud: 22%
Most Significant Cloud Type: low
26%
0.00 In
06:00

SW
SW

15 / 26 mph 48 / 43°F 91% 1029 mb
Low level cloud: 75%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: low
94%
0.03 In
12:00

SSE
SSE

9 / 11 mph 46 / 42°F 88% 1033 mb
Low level cloud: 60%
Mid level cloud: 7%
High level cloud: 45%
Most Significant Cloud Type: low
67%
0.00 In
18:00

WNW
WNW

8 / 10 mph 52 / 49°F 94% 1031 mb
Low level cloud: 64%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: low
83%
0.10 In
Sat 29
Dec
00:00

SSE
SSE

11 / 19 mph 43 / 37°F 91% 1030 mb
Low level cloud: 19%
Mid level cloud: 2%
High level cloud: 51%
Most Significant Cloud Type: low
25%
0.00 In
06:00

S
S

5 / 9 mph 48 / 46°F 97% 1034 mb
Low level cloud: 70%
Mid level cloud: 28%
High level cloud: 9%
Most Significant Cloud Type: low
80%
0.01 In
12:00

SSW
SSW

15 / 17 mph 51 / 46°F 86% 1027 mb
Low level cloud: 84%
Mid level cloud: 44%
High level cloud: 67%
Most Significant Cloud Type: low
100%
0.00 In
18:00

S
S

8 / 12 mph 51 / 48°F 94% 1035 mb
Low level cloud: 46%
Mid level cloud: 45%
High level cloud: 27%
Most Significant Cloud Type: low
64%
0.01 In
Sun 30
Dec
00:00

NW
NW

15 / 32 mph 42 / 34°F 83% 1031 mb
Low level cloud: 15%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
15%
0.12 In
06:00

S
S

11 / 18 mph 47 / 43°F 92% 1034 mb
Low level cloud: 29%
Mid level cloud: 1%
High level cloud: 91%
Most Significant Cloud Type: low
40%
0.00 In
12:00

N
N

9 / 16 mph 42 / 36°F 70% 1043 mb
Low level cloud: 16%
Mid level cloud: 3%
High level cloud: 57%
Most Significant Cloud Type: low
23%
0.00 In
18:00

SSW
SSW

15 / 19 mph 51 / 47°F 91% 1030 mb
Low level cloud: 59%
Mid level cloud: 11%
High level cloud: 71%
Most Significant Cloud Type: low
71%
0.00 In
Mon 31
Dec
00:00

S
S

6 / 12 mph 38 / 34°F 78% 1047 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 76%
Most Significant Cloud Type: high
75%
0.00 In
06:00

NNW
NNW

19 / 25 mph 50 / 44°F 88% 1027 mb
Low level cloud: 68%
Mid level cloud: 43%
High level cloud: 19%
Most Significant Cloud Type: low
84%
0.07 In
12:00

SW
SW

13 / 17 mph 46 / 40°F 78% 1045 mb
Low level cloud: 65%
Mid level cloud: 0%
High level cloud: 51%
Most Significant Cloud Type: low
70%
0.00 In
18:00

NNE
NNE

15 / 24 mph 41 / 33°F 66% 1038 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 43%
Most Significant Cloud Type: high
43%
0.00 In
Tue 01
Jan
00:00

WSW
WSW

16 / 32 mph 45 / 38°F 82% 1042 mb
Low level cloud: 68%
Mid level cloud: 30%
High level cloud: 34%
Most Significant Cloud Type: low
82%
0.02 In
06:00

N
N

6 / 10 mph 40 / 35°F 72% 1040 mb
Low level cloud: 3%
Mid level cloud: 3%
High level cloud: 6%
Most Significant Cloud Type: low
5%
0.00 In
12:00

WSW
WSW

15 / 25 mph 49 / 43°F 92% 1042 mb
Low level cloud: 83%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
98%
0.03 In
18:00

W
W

15 / 22 mph 44 / 37°F 75% 1035 mb
Low level cloud: 26%
Mid level cloud: 57%
High level cloud: 16%
Most Significant Cloud Type: low
47%
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