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Thorne St Margaret 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Thorne St Margaret

Somerset, United Kingdom

Long range weather outlook for Thorne St Margaret includes 14 day forecast summary:

For Thorne St Margaret in the coming two weeks the average daytime maximum temperature will be around 15°C, with a high for the two weeks of 18°C expected on the afternoon of Sunday 19th. The mean minimum temperature will be 10°C, dipping to its lowest on the morning of Monday 27th at 8°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain. Current predictions suggest Sunday 26th will have the most precipitation with an accumulation of around 6.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 19
May
12:00

NE
NE

13 / 19 mph 61 / 60°F 77% 1015 mb
Low level cloud: 14%
Mid level cloud: 7%
High level cloud: 4%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

11 / 19 mph 64 / 62°F 77% 1014 mb
Low level cloud: 33%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

9 / 15 mph 63 / 62°F 84% 1014 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 1%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

6 / 9 mph 63 / 61°F 90% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
00:00

NE
NE

7 / 9 mph 56 / 55°F 92% 1015 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

8 / 12 mph 52 / 50°F 89% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NE
NE

9 / 13 mph 50 / 46°F 87% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

11 / 15 mph 54 / 49°F 78% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

12 / 16 mph 59 / 55°F 74% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: high
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

11 / 16 mph 61 / 60°F 72% 1013 mb
Low level cloud: 6%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

10 / 16 mph 61 / 60°F 82% 1012 mb
Low level cloud: 6%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

8 / 15 mph 56 / 53°F 92% 1012 mb
Low level cloud: 23%
Mid level cloud: 2%
High level cloud: 1%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
00:00

NE
NE

6 / 11 mph 52 / 50°F 92% 1011 mb
Low level cloud: 4%
Mid level cloud: 12%
High level cloud: 6%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

8 / 13 mph 50 / 46°F 89% 1010 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 8%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NE
NE

7 / 12 mph 49 / 45°F 84% 1010 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 33%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

8 / 11 mph 52 / 48°F 70% 1010 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 100%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

5 / 8 mph 55 / 52°F 70% 1010 mb
Low level cloud: 0%
Mid level cloud: 47%
High level cloud: 41%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

4 / 6 mph 57 / 56°F 68% 1009 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 16%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

4 / 6 mph 57 / 56°F 74% 1009 mb
Low level cloud: 7%
Mid level cloud: 23%
High level cloud: 34%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

5 / 9 mph 55 / 51°F 88% 1010 mb
Low level cloud: 21%
Mid level cloud: 46%
High level cloud: 92%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May
00:00

W
W

8 / 13 mph 51 / 48°F 93% 1009 mb
Low level cloud: 47%
Mid level cloud: 80%
High level cloud: 16%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

8 / 14 mph 51 / 47°F 93% 1009 mb
Low level cloud: 5%
Mid level cloud: 22%
High level cloud: 2%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

8 / 13 mph 53 / 49°F 93% 1009 mb
Low level cloud: 18%
Mid level cloud: 48%
High level cloud: 4%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

15 / 22 mph 56 / 52°F 87% 1009 mb
Low level cloud: 68%
Mid level cloud: 28%
High level cloud: 1%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

17 / 23 mph 57 / 53°F 86% 1009 mb
Low level cloud: 34%
Mid level cloud: 22%
High level cloud: 1%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

19 / 27 mph 57 / 52°F 81% 1010 mb
Low level cloud: 36%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

15 / 22 mph 55 / 50°F 84% 1012 mb
Low level cloud: 1%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

10 / 17 mph 50 / 46°F 91% 1013 mb
Low level cloud: 7%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May
00:00

WSW
WSW

8 / 14 mph 49 / 45°F 90% 1014 mb
Low level cloud: 2%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

7 / 14 mph 48 / 44°F 88% 1014 mb
Low level cloud: 22%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

6 / 10 mph 52 / 48°F 85% 1015 mb
Low level cloud: 69%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NW
NW

6 / 8 mph 55 / 53°F 84% 1016 mb
Low level cloud: 77%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WNW
WNW

7 / 10 mph 56 / 52°F 83% 1017 mb
Low level cloud: 45%
Mid level cloud: 52%
High level cloud: 5%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

10 / 15 mph 57 / 53°F 79% 1017 mb
Low level cloud: 38%
Mid level cloud: 23%
High level cloud: 7%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

11 / 15 mph 56 / 52°F 82% 1018 mb
Low level cloud: 26%
Mid level cloud: 19%
High level cloud: 6%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NW
NW

8 / 13 mph 52 / 47°F 88% 1020 mb
Low level cloud: 25%
Mid level cloud: 23%
High level cloud: 3%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 24
May
00:00

NNW
NNW

5 / 9 mph 49 / 47°F 87% 1020 mb
Low level cloud: 41%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

5 / 8 mph 48 / 46°F 91% 1020 mb
Low level cloud: 74%
Mid level cloud: 39%
High level cloud: 0%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NE
NE

5 / 8 mph 51 / 48°F 89% 1021 mb
Low level cloud: 79%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

6 / 9 mph 53 / 51°F 86% 1021 mb
Low level cloud: 90%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

4 / 6 mph 58 / 55°F 83% 1021 mb
Low level cloud: 56%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

6 / 9 mph 61 / 58°F 76% 1020 mb
Low level cloud: 51%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

7 / 9 mph 60 / 58°F 81% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

5 / 7 mph 57 / 55°F 89% 1021 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 7%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 25
May
00:00

S
S

6 / 10 mph 52 / 50°F 89% 1021 mb
Low level cloud: 4%
Mid level cloud: 3%
High level cloud: 22%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

6 / 11 mph 50 / 48°F 89% 1020 mb
Low level cloud: 16%
Mid level cloud: 2%
High level cloud: 96%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

9 / 15 mph 52 / 48°F 87% 1019 mb
Low level cloud: 93%
Mid level cloud: 3%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

15 / 21 mph 56 / 53°F 80% 1018 mb
Low level cloud: 78%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

15 / 22 mph 57 / 54°F 86% 1017 mb
Low level cloud: 68%
Mid level cloud: 48%
High level cloud: 94%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

16 / 24 mph 59 / 55°F 77% 1015 mb
Low level cloud: 5%
Mid level cloud: 45%
High level cloud: 13%
Most Significant Cloud Type: medium
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

12 / 19 mph 53 / 49°F 90% 1014 mb
Low level cloud: 9%
Mid level cloud: 85%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

16 / 25 mph 52 / 47°F 94% 1012 mb
Low level cloud: 92%
Mid level cloud: 92%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 26
May
00:00

SE
SE

9 / 19 mph 55 / 52°F 96% 1013 mb
Low level cloud: 82%
Mid level cloud: 47%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
06:00

ESE
ESE

7 / 14 mph 53 / 50°F 87% 1018 mb
Low level cloud: 0%
Mid level cloud: 99%
High level cloud: 92%
Most Significant Cloud Type: medium
100%
0.0 In
12:00

W
W

9 / 20 mph 55 / 52°F 78% 1007 mb
Low level cloud: 36%
Mid level cloud: 67%
High level cloud: 18%
Most Significant Cloud Type: low
61%
0.0 In
18:00

SSE
SSE

10 / 22 mph 57 / 55°F 96% 1011 mb
Low level cloud: 64%
Mid level cloud: 82%
High level cloud: 48%
Most Significant Cloud Type: low
98%
0.0 In
Mon 27
May
00:00

SSW
SSW

7 / 14 mph 52 / 49°F 93% 1017 mb
Low level cloud: 18%
Mid level cloud: 10%
High level cloud: 1%
Most Significant Cloud Type: low
21%
0.0 In
06:00

NE
NE

13 / 27 mph 53 / 49°F 97% 1018 mb
Low level cloud: 93%
Mid level cloud: 4%
High level cloud: 92%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NNE
NNE

12 / 23 mph 57 / 54°F 85% 1018 mb
Low level cloud: 78%
Mid level cloud: 22%
High level cloud: 100%
Most Significant Cloud Type: low
97%
0.0 In
18:00

NE
NE

10 / 21 mph 63 / 63°F 94% 1015 mb
Low level cloud: 26%
Mid level cloud: 18%
High level cloud: 100%
Most Significant Cloud Type: low
44%
0.1 In
Tue 28
May
00:00

NNE
NNE

10 / 21 mph 53 / 50°F 90% 1020 mb
Low level cloud: 5%
Mid level cloud: 23%
High level cloud: 54%
Most Significant Cloud Type: medium
39%
0.1 In
06:00

NE
NE

15 / 31 mph 54 / 49°F 95% 1017 mb
Low level cloud: 63%
Mid level cloud: 16%
High level cloud: 34%
Most Significant Cloud Type: low
72%
0.1 In
12:00

NNE
NNE

17 / 35 mph 59 / 59°F 71% 1019 mb
Low level cloud: 1%
Mid level cloud: 29%
High level cloud: 16%
Most Significant Cloud Type: medium
32%
0.0 In
18:00

NE
NE

14 / 30 mph 64 / 64°F 91% 1016 mb
Low level cloud: 18%
Mid level cloud: 46%
High level cloud: 64%
Most Significant Cloud Type: low
41%
0.1 In
Wed 29
May
00:00

NNE
NNE

14 / 28 mph 55 / 51°F 86% 1018 mb
Low level cloud: 2%
Mid level cloud: 13%
High level cloud: 2%
Most Significant Cloud Type: medium
17%
0.0 In
06:00

NE
NE

14 / 30 mph 52 / 48°F 95% 1015 mb
Low level cloud: 96%
Mid level cloud: 14%
High level cloud: 12%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NE
NE

14 / 28 mph 61 / 61°F 76% 1017 mb
Low level cloud: 85%
Mid level cloud: 23%
High level cloud: 32%
Most Significant Cloud Type: low
97%
0.0 In
18:00

N
N

9 / 19 mph 63 / 63°F 92% 1012 mb
Low level cloud: 80%
Mid level cloud: 43%
High level cloud: 85%
Most Significant Cloud Type: low
100%
0.0 In
Thu 30
May
00:00

NE
NE

13 / 25 mph 56 / 53°F 89% 1016 mb
Low level cloud: 65%
Mid level cloud: 61%
High level cloud: 16%
Most Significant Cloud Type: low
88%
0.0 In
06:00

NNE
NNE

12 / 24 mph 54 / 51°F 94% 1011 mb
Low level cloud: 50%
Mid level cloud: 56%
High level cloud: 100%
Most Significant Cloud Type: low
81%
0.4 In
12:00

NE
NE

12 / 25 mph 54 / 50°F 91% 1017 mb
Low level cloud: 94%
Mid level cloud: 25%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

ENE
ENE

15 / 31 mph 60 / 60°F 90% 1012 mb
Low level cloud: 37%
Mid level cloud: 59%
High level cloud: 100%
Most Significant Cloud Type: low
70%
0.1 In
Fri 31
May
00:00

NNW
NNW

4 / 9 mph 57 / 57°F 96% 1016 mb
Low level cloud: 98%
Mid level cloud: 12%
High level cloud: 39%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NE
NE

13 / 27 mph 46 / 40°F 90% 1016 mb
Low level cloud: 38%
Mid level cloud: 85%
High level cloud: 31%
Most Significant Cloud Type: low
71%
0.3 In
12:00

NE
NE

6 / 13 mph 60 / 60°F 86% 1015 mb
Low level cloud: 56%
Mid level cloud: 14%
High level cloud: 15%
Most Significant Cloud Type: low
62%
0.0 In
18:00

N
N

7 / 15 mph 53 / 51°F 76% 1018 mb
Low level cloud: 46%
Mid level cloud: 11%
High level cloud: 2%
Most Significant Cloud Type: low
49%
0.0 In
Sat 01
Jun
00:00

W
W

3 / 7 mph 56 / 57°F 92% 1013 mb
Low level cloud: 43%
Mid level cloud: 16%
High level cloud: 16%
Most Significant Cloud Type: low
50%
0.0 In
06:00

SE
SE

3 / 6 mph 53 / 53°F 77% 1021 mb
Low level cloud: 2%
Mid level cloud: 7%
High level cloud: 36%
Most Significant Cloud Type: medium
14%
0.0 In
12:00

WNW
WNW

8 / 17 mph 63 / 63°F 83% 1010 mb
Low level cloud: 42%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
48%
0.1 In
18:00

NW
NW

7 / 15 mph 56 / 54°F 80% 1020 mb
Low level cloud: 17%
Mid level cloud: 4%
High level cloud: 20%
Most Significant Cloud Type: low
20%
0.0 In
Sun 02
Jun
00:00

WSW
WSW

5 / 11 mph 60 / 60°F 90% 1010 mb
Low level cloud: 2%
Mid level cloud: 5%
High level cloud: 4%
Most Significant Cloud Type: low
4%
0.1 In
06:00

WSW
WSW

5 / 11 mph 52 / 50°F 80% 1019 mb
Low level cloud: 0%
Mid level cloud: 51%
High level cloud: 12%
Most Significant Cloud Type: medium
51%
0.0 In
12:00

S
S

4 / 8 mph 61 / 61°F 74% 1012 mb
Low level cloud: 60%
Mid level cloud: 28%
High level cloud: 98%
Most Significant Cloud Type: low
81%
0.0 In
18:00

WNW
WNW

11 / 22 mph 57 / 54°F 82% 1019 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 5%
Most Significant Cloud Type: high
5%
0.0 In
Mon 03
Jun
00:00

E
E

2 / 3 mph 58 / 58°F 88% 1013 mb
Low level cloud: 0%
Mid level cloud: 38%
High level cloud: 33%
Most Significant Cloud Type: medium
39%
0.0 In
06:00

WNW
WNW

4 / 8 mph 55 / 55°F 80% 1020 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
12:00

E
E

15 / 32 mph 59 / 56°F 96% 1008 mb
Low level cloud: 75%
Mid level cloud: 78%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
18:00

WNW
WNW

6 / 12 mph 60 / 60°F 90% 1019 mb
Low level cloud: 12%
Mid level cloud: 30%
High level cloud: 36%
Most Significant Cloud Type: low
27%
0.1 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