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Cefn Bychan 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Cefn Bychan

Blaenau Gwent, United Kingdom

Long range weather outlook for Cefn Bychan includes 14 day forecast summary:

Reviewing the forecast for Cefn Bychan Over the next 14 days and the average daytime maximum temperature will be around 9°C, with a high for the two weeks of 11°C expected on the evening of Friday 21st. The mean minimum temperature will be 5°C, dipping to its lowest on the morning of Saturday 15th at 2°C. Expect the coming 14 days 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 36.0mm. On the whole winds are likely to be moderate. The strongest wind will be felt on the evening of Tuesday 18th, coming from a southerly direction, and reaching around 29mph.

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

SSE
SSE

24 / 37 mph 46 / 38°F 96% 998 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.55 In of precipitation over the past 3 hours.
0.55 In
18:00

SW
SW

23 / 37 mph 50 / 43°F 87% 995 mb
Low level cloud: 70%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
76%
Expect 0.16 In of precipitation over the past 3 hours.
0.16 In
21:00

W
W

26 / 40 mph 45 / 35°F 80% 998 mb
Low level cloud: 71%
Mid level cloud: 68%
High level cloud: 0%
Most Significant Cloud Type: low
94%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
Sun 16
Dec
00:00

W
W

17 / 27 mph 44 / 36°F 81% 1002 mb
Low level cloud: 11%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
17%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

WSW
WSW

11 / 21 mph 42 / 36°F 86% 1004 mb
Low level cloud: 22%
Mid level cloud: 91%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

WSW
WSW

11 / 22 mph 42 / 35°F 85% 1005 mb
Low level cloud: 2%
Mid level cloud: 28%
High level cloud: 13%
Most Significant Cloud Type: medium
35%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
09:00

SW
SW

10 / 15 mph 44 / 39°F 87% 1005 mb
Low level cloud: 38%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: low
77%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
12:00

SW
SW

13 / 16 mph 47 / 41°F 83% 1005 mb
Low level cloud: 25%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
15:00

WSW
WSW

13 / 18 mph 48 / 42°F 82% 1005 mb
Low level cloud: 2%
Mid level cloud: 54%
High level cloud: 100%
Most Significant Cloud Type: medium
62%
Expect 0.05 In of precipitation over the past 3 hours.
0.05 In
18:00

WSW
WSW

9 / 11 mph 47 / 42°F 86% 1007 mb
Low level cloud: 15%
Mid level cloud: 9%
High level cloud: 42%
Most Significant Cloud Type: low
23%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
21:00

WSW
WSW

9 / 15 mph 45 / 40°F 84% 1010 mb
Low level cloud: 13%
Mid level cloud: 84%
High level cloud: 33%
Most Significant Cloud Type: medium
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Mon 17
Dec
00:00

W
W

10 / 20 mph 42 / 36°F 86% 1011 mb
Low level cloud: 15%
Mid level cloud: 11%
High level cloud: 34%
Most Significant Cloud Type: low
22%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

WSW
WSW

9 / 18 mph 42 / 36°F 85% 1013 mb
Low level cloud: 7%
Mid level cloud: 5%
High level cloud: 48%
Most Significant Cloud Type: low
14%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

WSW
WSW

10 / 19 mph 42 / 36°F 86% 1015 mb
Low level cloud: 33%
Mid level cloud: 8%
High level cloud: 90%
Most Significant Cloud Type: low
46%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

SSW
SSW

10 / 19 mph 43 / 37°F 89% 1016 mb
Low level cloud: 41%
Mid level cloud: 7%
High level cloud: 19%
Most Significant Cloud Type: low
45%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

SSW
SSW

15 / 21 mph 48 / 42°F 83% 1016 mb
Low level cloud: 64%
Mid level cloud: 29%
High level cloud: 84%
Most Significant Cloud Type: low
84%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

SSW
SSW

16 / 25 mph 48 / 42°F 86% 1015 mb
Low level cloud: 80%
Mid level cloud: 46%
High level cloud: 90%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

SSW
SSW

19 / 29 mph 49 / 42°F 89% 1015 mb
Low level cloud: 91%
Mid level cloud: 66%
High level cloud: 94%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:00

S
S

20 / 31 mph 50 / 44°F 90% 1014 mb
Low level cloud: 91%
Mid level cloud: 48%
High level cloud: 42%
Most Significant Cloud Type: low
100%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
Tue 18
Dec
00:00

S
S

22 / 46 mph 45 / 37°F 89% 1013 mb
Low level cloud: 90%
Mid level cloud: 25%
High level cloud: 91%
Most Significant Cloud Type: low
100%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
03:00

S
S

26 / 55 mph 44 / 34°F 84% 1011 mb
Low level cloud: 90%
Mid level cloud: 31%
High level cloud: 47%
Most Significant Cloud Type: low
100%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
06:00

S
S

26 / 54 mph 43 / 33°F 81% 1007 mb
Low level cloud: 60%
Mid level cloud: 23%
High level cloud: 89%
Most Significant Cloud Type: low
79%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
09:00

SSE
SSE

29 / 51 mph 46 / 36°F 84% 1004 mb
Low level cloud: 79%
Mid level cloud: 95%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.04 In of precipitation over the past 3 hours.
0.04 In
12:00

SSE
SSE

29 / 34 mph 49 / 40°F 89% 1001 mb
Low level cloud: 99%
Mid level cloud: 96%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.31 In of precipitation over the past 3 hours.
0.31 In
15:00

S
S

30 / 34 mph 50 / 42°F 88% 999 mb
Low level cloud: 97%
Mid level cloud: 96%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.45 In of precipitation over the past 3 hours.
0.45 In
18:00

S
S

30 / 40 mph 49 / 40°F 91% 998 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.29 In of precipitation over the past 3 hours.
0.29 In
21:00

NW
NW

13 / 15 mph 47 / 41°F 81% 999 mb
Low level cloud: 0%
Mid level cloud: 96%
High level cloud: 89%
Most Significant Cloud Type: medium
100%
Expect 0.28 In of precipitation over the past 3 hours.
0.28 In
Wed 19
Dec
00:00

WSW
WSW

12 / 20 mph 44 / 38°F 86% 1002 mb
Low level cloud: 22%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
26%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

WSW
WSW

11 / 21 mph 43 / 37°F 84% 1005 mb
Low level cloud: 10%
Mid level cloud: 8%
High level cloud: 4%
Most Significant Cloud Type: low
13%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

SW
SW

11 / 20 mph 42 / 36°F 83% 1007 mb
Low level cloud: 8%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

SW
SW

11 / 16 mph 45 / 39°F 83% 1009 mb
Low level cloud: 14%
Mid level cloud: 8%
High level cloud: 1%
Most Significant Cloud Type: low
16%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

SW
SW

15 / 18 mph 47 / 41°F 77% 1009 mb
Low level cloud: 23%
Mid level cloud: 8%
High level cloud: 33%
Most Significant Cloud Type: low
29%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

SW
SW

13 / 16 mph 49 / 43°F 79% 1009 mb
Low level cloud: 17%
Mid level cloud: 46%
High level cloud: 95%
Most Significant Cloud Type: low
44%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
18:00

SW
SW

11 / 13 mph 47 / 42°F 83% 1011 mb
Low level cloud: 19%
Mid level cloud: 9%
High level cloud: 73%
Most Significant Cloud Type: low
30%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:00

SW
SW

11 / 17 mph 45 / 40°F 84% 1012 mb
Low level cloud: 24%
Mid level cloud: 46%
High level cloud: 2%
Most Significant Cloud Type: low
39%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Thu 20
Dec
00:00

SW
SW

13 / 25 mph 43 / 36°F 86% 1013 mb
Low level cloud: 27%
Mid level cloud: 91%
High level cloud: 91%
Most Significant Cloud Type: medium
100%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
03:00

WSW
WSW

9 / 20 mph 42 / 36°F 87% 1014 mb
Low level cloud: 0%
Mid level cloud: 90%
High level cloud: 83%
Most Significant Cloud Type: medium
93%
Expect 0.05 In of precipitation over the past 3 hours.
0.05 In
06:00

W
W

7 / 15 mph 41 / 36°F 87% 1015 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 4%
Most Significant Cloud Type: medium
44%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
09:00

W
W

6 / 11 mph 43 / 39°F 89% 1017 mb
Low level cloud: 1%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

W
W

7 / 11 mph 46 / 42°F 80% 1019 mb
Low level cloud: 3%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
34%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

W
W

6 / 9 mph 47 / 44°F 84% 1019 mb
Low level cloud: 5%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
37%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

W
W

5 / 6 mph 46 / 44°F 87% 1021 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 8%
Most Significant Cloud Type: medium
22%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

WSW
WSW

4 / 6 mph 45 / 42°F 86% 1022 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 91%
Most Significant Cloud Type: medium
11%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Fri 21
Dec
00:00

SSW
SSW

7 / 14 mph 43 / 38°F 88% 1022 mb
Low level cloud: 42%
Mid level cloud: 11%
High level cloud: 91%
Most Significant Cloud Type: low
56%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

SSW
SSW

11 / 18 mph 44 / 38°F 89% 1020 mb
Low level cloud: 24%
Mid level cloud: 85%
High level cloud: 86%
Most Significant Cloud Type: medium
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

S
S

15 / 23 mph 46 / 39°F 95% 1018 mb
Low level cloud: 95%
Mid level cloud: 90%
High level cloud: 88%
Most Significant Cloud Type: low
100%
Expect 0.13 In of precipitation over the past 3 hours.
0.13 In
09:00

SSW
SSW

17 / 27 mph 50 / 44°F 95% 1015 mb
Low level cloud: 91%
Mid level cloud: 73%
High level cloud: 94%
Most Significant Cloud Type: low
100%
Expect 0.09 In of precipitation over the past 3 hours.
0.09 In
12:00

SSW
SSW

21 / 32 mph 51 / 44°F 94% 1012 mb
Low level cloud: 94%
Mid level cloud: 79%
High level cloud: 95%
Most Significant Cloud Type: low
100%
Expect 0.09 In of precipitation over the past 3 hours.
0.09 In
15:00

SSW
SSW

18 / 27 mph 52 / 47°F 95% 1009 mb
Low level cloud: 95%
Mid level cloud: 74%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.22 In of precipitation over the past 3 hours.
0.22 In
18:00

SW
SW

12 / 19 mph 52 / 48°F 96% 1008 mb
Low level cloud: 91%
Mid level cloud: 60%
High level cloud: 4%
Most Significant Cloud Type: low
100%
Expect 0.12 In of precipitation over the past 3 hours.
0.12 In
21:00

W
W

14 / 22 mph 52 / 47°F 96% 1007 mb
Low level cloud: 90%
Mid level cloud: 72%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.08 In of precipitation over the past 3 hours.
0.08 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sat 22
Dec
00:00

ESE
ESE

7 / 9 mph 39 / 34°F 95% 1016 mb
Low level cloud: 69%
Mid level cloud: 47%
High level cloud: 91%
Most Significant Cloud Type: low
95%
0.00 In
06:00

WNW
WNW

15 / 28 mph 42 / 34°F 86% 996 mb
Low level cloud: 29%
Mid level cloud: 29%
High level cloud: 10%
Most Significant Cloud Type: low
39%
0.04 In
12:00

W
W

11 / 14 mph 47 / 42°F 82% 1006 mb
Low level cloud: 32%
Mid level cloud: 45%
High level cloud: 80%
Most Significant Cloud Type: low
57%
0.00 In
18:00

NNW
NNW

5 / 6 mph 45 / 43°F 86% 1007 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 88%
Most Significant Cloud Type: medium
47%
0.00 In
Sun 23
Dec
00:00

W
W

13 / 27 mph 39 / 31°F 86% 1005 mb
Low level cloud: 26%
Mid level cloud: 70%
High level cloud: 21%
Most Significant Cloud Type: low
52%
0.00 In
06:00

SE
SE

15 / 24 mph 43 / 35°F 96% 1013 mb
Low level cloud: 94%
Mid level cloud: 93%
High level cloud: 96%
Most Significant Cloud Type: low
100%
0.14 In
12:00

SW
SW

23 / 37 mph 53 / 47°F 92% 1013 mb
Low level cloud: 90%
Mid level cloud: 73%
High level cloud: 90%
Most Significant Cloud Type: low
100%
0.15 In
18:00

ENE
ENE

7 / 9 mph 46 / 42°F 97% 999 mb
Low level cloud: 84%
Mid level cloud: 69%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.06 In
Mon 24
Dec
00:00

WSW
WSW

22 / 32 mph 53 / 48°F 93% 1009 mb
Low level cloud: 91%
Mid level cloud: 68%
High level cloud: 94%
Most Significant Cloud Type: low
100%
0.31 In
06:00

N
N

16 / 31 mph 40 / 31°F 91% 1002 mb
Low level cloud: 93%
Mid level cloud: 92%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.19 In
12:00

W
W

21 / 30 mph 47 / 40°F 77% 1013 mb
Low level cloud: 13%
Mid level cloud: 7%
High level cloud: 88%
Most Significant Cloud Type: low
26%
0.00 In
18:00

NW
NW

9 / 10 mph 45 / 41°F 86% 1011 mb
Low level cloud: 30%
Mid level cloud: 1%
High level cloud: 2%
Most Significant Cloud Type: low
30%
0.00 In
Tue 25
Dec
00:00

NW
NW

14 / 25 mph 41 / 33°F 81% 1019 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 10%
Most Significant Cloud Type: medium
14%
0.00 In
06:00

SSW
SSW

13 / 21 mph 42 / 35°F 86% 1012 mb
Low level cloud: 63%
Mid level cloud: 55%
High level cloud: 93%
Most Significant Cloud Type: low
93%
0.00 In
12:00

NW
NW

13 / 26 mph 42 / 35°F 74% 1029 mb
Low level cloud: 29%
Mid level cloud: 5%
High level cloud: 18%
Most Significant Cloud Type: low
32%
0.00 In
18:00

W
W

12 / 19 mph 46 / 40°F 88% 1008 mb
Low level cloud: 8%
Mid level cloud: 32%
High level cloud: 4%
Most Significant Cloud Type: medium
53%
0.26 In
Wed 26
Dec
00:00

NW
NW

8 / 12 mph 42 / 37°F 89% 1034 mb
Low level cloud: 18%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
26%
0.01 In
06:00

WNW
WNW

9 / 17 mph 40 / 34°F 86% 1019 mb
Low level cloud: 1%
Mid level cloud: 2%
High level cloud: 8%
Most Significant Cloud Type: medium
4%
0.02 In
12:00

NW
NW

6 / 9 mph 44 / 40°F 82% 1036 mb
Low level cloud: 32%
Mid level cloud: 14%
High level cloud: 9%
Most Significant Cloud Type: low
38%
0.00 In
18:00

S
S

16 / 29 mph 45 / 37°F 91% 1020 mb
Low level cloud: 79%
Mid level cloud: 50%
High level cloud: 50%
Most Significant Cloud Type: low
100%
0.01 In
Thu 27
Dec
00:00

W
W

6 / 10 mph 41 / 37°F 91% 1034 mb
Low level cloud: 13%
Mid level cloud: 54%
High level cloud: 45%
Most Significant Cloud Type: medium
91%
0.00 In
06:00

SSW
SSW

21 / 43 mph 49 / 42°F 91% 1015 mb
Low level cloud: 73%
Mid level cloud: 44%
High level cloud: 19%
Most Significant Cloud Type: low
91%
0.10 In
12:00

W
W

12 / 15 mph 46 / 41°F 81% 1033 mb
Low level cloud: 51%
Mid level cloud: 77%
High level cloud: 69%
Most Significant Cloud Type: low
85%
0.00 In
18:00

W
W

12 / 18 mph 45 / 39°F 76% 1025 mb
Low level cloud: 5%
Mid level cloud: 3%
High level cloud: 36%
Most Significant Cloud Type: low
10%
0.09 In
Fri 28
Dec
00:00

W
W

9 / 16 mph 43 / 37°F 89% 1032 mb
Low level cloud: 22%
Mid level cloud: 26%
High level cloud: 2%
Most Significant Cloud Type: low
31%
0.01 In
06:00

W
W

11 / 18 mph 43 / 37°F 83% 1030 mb
Low level cloud: 4%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
41%
0.02 In
12:00

W
W

6 / 9 mph 46 / 43°F 85% 1033 mb
Low level cloud: 9%
Mid level cloud: 67%
High level cloud: 68%
Most Significant Cloud Type: medium
93%
0.00 In
18:00

W
W

7 / 11 mph 44 / 40°F 84% 1037 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
31%
0.00 In
Sat 29
Dec
00:00

W
W

2 / 3 mph 48 / 48°F 92% 1034 mb
Low level cloud: 16%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
18%
0.00 In
06:00

S
S

7 / 12 mph 41 / 36°F 93% 1035 mb
Low level cloud: 20%
Mid level cloud: 4%
High level cloud: 20%
Most Significant Cloud Type: low
24%
0.00 In
12:00

E
E

4 / 4 mph 44 / 42°F 88% 1033 mb
Low level cloud: 34%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
35%
0.00 In
18:00

S
S

10 / 13 mph 46 / 41°F 90% 1030 mb
Low level cloud: 15%
Mid level cloud: 63%
High level cloud: 71%
Most Significant Cloud Type: medium
100%
0.01 In
Sun 30
Dec
00:00

SE
SE

6 / 9 mph 40 / 35°F 96% 1034 mb
Low level cloud: 64%
Mid level cloud: 5%
High level cloud: 13%
Most Significant Cloud Type: low
67%
0.00 In
06:00

SSW
SSW

16 / 33 mph 42 / 34°F 93% 1020 mb
Low level cloud: 76%
Mid level cloud: 46%
High level cloud: 47%
Most Significant Cloud Type: low
97%
0.04 In
12:00

S
S

11 / 15 mph 46 / 40°F 87% 1034 mb
Low level cloud: 71%
Mid level cloud: 4%
High level cloud: 6%
Most Significant Cloud Type: low
73%
0.01 In
18:00

WNW
WNW

11 / 13 mph 48 / 44°F 82% 1023 mb
Low level cloud: 3%
Mid level cloud: 20%
High level cloud: 100%
Most Significant Cloud Type: medium
31%
0.14 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