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Wennington 14 Day Long Range Forecast

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

Havering, United Kingdom

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

The outlook for Wennington in the two weeks ahead shows the average daytime maximum temperature will be around 11°C, with a high for the two weeks of 17°C expected on the afternoon of Saturday 22nd. The mean minimum temperature will be 6°C, dipping to its lowest on the morning of Sunday 16th at 0°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain or sleet. The indicators are that Friday 14th will have the most precipitation with an accumulation of around 1.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 14
Mar		15:00

NE
NE

 7 / 11 mph 43 / 39°F 66% 1012 mb
Low level cloud: 75%
Mid level cloud: 46%
High level cloud: 88%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

 6 / 9 mph 40 / 36°F 77% 1014 mb
Low level cloud: 79%
Mid level cloud: 23%
High level cloud: 16%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 6 / 8 mph 38 / 33°F 80% 1017 mb
Low level cloud: 3%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 15
Mar		00:00

NNE
NNE

 5 / 8 mph 36 / 31°F 84% 1019 mb
Low level cloud: 1%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

 7 / 11 mph 34 / 28°F 90% 1019 mb
Low level cloud: 14%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 7 / 11 mph 34 / 28°F 90% 1021 mb
Low level cloud: 44%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 10 / 15 mph 38 / 31°F 71% 1022 mb
Low level cloud: 39%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 12 / 16 mph 44 / 37°F 46% 1022 mb
Low level cloud: 40%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 13 / 19 mph 44 / 37°F 44% 1022 mb
Low level cloud: 18%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

 9 / 11 mph 44 / 39°F 62% 1024 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

NNE
NNE

 8 / 9 mph 39 / 33°F 73% 1025 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
Sun 16
Mar		00:00

NNE
NNE

 7 / 11 mph 35 / 29°F 82% 1025 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
03:00

NNE
NNE

 6 / 9 mph 34 / 29°F 90% 1025 mb
Low level cloud: 17%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 5 / 9 mph 33 / 28°F 95% 1025 mb
Low level cloud: 33%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 9 / 14 mph 40 / 33°F 72% 1026 mb
Low level cloud: 30%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 11 / 16 mph 44 / 38°F 53% 1026 mb
Low level cloud: 74%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 9 / 14 mph 46 / 41°F 61% 1025 mb
Low level cloud: 92%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

 6 / 10 mph 45 / 41°F 81% 1025 mb
Low level cloud: 62%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 7 / 10 mph 41 / 37°F 93% 1027 mb
Low level cloud: 44%
Mid level cloud: 2%
High level cloud: 49%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 17
Mar		00:00

NNE
NNE

 7 / 10 mph 39 / 34°F 96% 1027 mb
Low level cloud: 80%
Mid level cloud: 3%
High level cloud: 13%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

 8 / 13 mph 37 / 31°F 95% 1027 mb
Low level cloud: 98%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 6 / 10 mph 37 / 33°F 78% 1027 mb
Low level cloud: 40%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 9 / 13 mph 39 / 33°F 78% 1027 mb
Low level cloud: 97%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

 13 / 20 mph 43 / 36°F 74% 1026 mb
Low level cloud: 90%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

 15 / 20 mph 42 / 34°F 75% 1026 mb
Low level cloud: 98%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

 11 / 17 mph 42 / 35°F 80% 1026 mb
Low level cloud: 34%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

 9 / 15 mph 41 / 35°F 88% 1026 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 18
Mar		00:00

E
E

 11 / 19 mph 42 / 35°F 83% 1024 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
03:00

E
E

 10 / 14 mph 42 / 36°F 83% 1024 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

ESE
ESE

 9 / 13 mph 40 / 34°F 78% 1024 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

ESE
ESE

 11 / 16 mph 42 / 35°F 60% 1024 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
12:00

E
E

 12 / 15 mph 46 / 40°F 49% 1024 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
15:00

E
E

 12 / 17 mph 46 / 40°F 51% 1023 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
18:00

E
E

 8 / 9 mph 46 / 41°F 68% 1023 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

E
E

 5 / 10 mph 42 / 39°F 79% 1023 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 22%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 19
Mar		00:00

ESE
ESE

 4 / 9 mph 43 / 40°F 78% 1023 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

 3 / 6 mph 43 / 42°F 87% 1022 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

 3 / 6 mph 42 / 41°F 91% 1023 mb
Low level cloud: 2%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 4 / 6 mph 49 / 48°F 76% 1023 mb
Low level cloud: 41%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

 7 / 10 mph 59 / 57°F 53% 1022 mb
Low level cloud: 9%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

 8 / 12 mph 60 / 58°F 54% 1021 mb
Low level cloud: 12%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

 6 / 7 mph 57 / 55°F 76% 1022 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

 4 / 8 mph 51 / 50°F 82% 1023 mb
Low level cloud: 71%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 20
Mar		00:00

ESE
ESE

 5 / 8 mph 50 / 49°F 80% 1022 mb
Low level cloud: 49%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

 5 / 9 mph 50 / 48°F 84% 1021 mb
Low level cloud: 2%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

 5 / 8 mph 49 / 46°F 82% 1020 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 14%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

 8 / 12 mph 51 / 48°F 72% 1020 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 33%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

 10 / 13 mph 58 / 56°F 58% 1019 mb
Low level cloud: 1%
Mid level cloud: 5%
High level cloud: 10%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

 10 / 14 mph 59 / 56°F 59% 1017 mb
Low level cloud: 32%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

 6 / 9 mph 57 / 55°F 75% 1017 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 86%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

 5 / 9 mph 54 / 52°F 84% 1017 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 87%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 21
Mar		00:00

S
S

 9 / 15 mph 50 / 46°F 93% 1010 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
06:00

SW
SW

 7 / 13 mph 44 / 40°F 96% 1013 mb
Low level cloud: 95%
Mid level cloud: 44%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSW
SSW

 3 / 4 mph 54 / 55°F 84% 1020 mb
Low level cloud: 39%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
50%
0.0 In
18:00

SE
SE

 5 / 8 mph 64 / 64°F 76% 1009 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 15%
Most Significant Cloud Type: medium
26%
0.0 In
Sat 22
Mar		00:00

SE
SE

 3 / 5 mph 56 / 56°F 80% 1014 mb
Low level cloud: 4%
Mid level cloud: 31%
High level cloud: 78%
Most Significant Cloud Type: medium
43%
0.0 In
06:00

S
S

 12 / 19 mph 50 / 45°F 90% 1004 mb
Low level cloud: 100%
Mid level cloud: 10%
High level cloud: 97%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSE
SSE

 14 / 20 mph 50 / 45°F 91% 1003 mb
Low level cloud: 96%
Mid level cloud: 72%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

S
S

 9 / 12 mph 62 / 62°F 77% 1012 mb
Low level cloud: 3%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
57%
0.0 In
Sun 23
Mar		00:00

SSE
SSE

 13 / 23 mph 46 / 40°F 81% 1003 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
0.1 In
06:00

SSW
SSW

 11 / 17 mph 47 / 42°F 90% 1012 mb
Low level cloud: 86%
Mid level cloud: 6%
High level cloud: 3%
Most Significant Cloud Type: low
88%
0.0 In
12:00

SSW
SSW

 15 / 23 mph 49 / 43°F 78% 1001 mb
Low level cloud: 31%
Mid level cloud: 44%
High level cloud: 98%
Most Significant Cloud Type: low
58%
0.2 In
18:00

S
S

 13 / 21 mph 54 / 50°F 71% 1008 mb
Low level cloud: 3%
Mid level cloud: 25%
High level cloud: 100%
Most Significant Cloud Type: medium
38%
0.0 In
Mon 24
Mar		00:00

SSW
SSW

 18 / 30 mph 47 / 40°F 79% 998 mb
Low level cloud: 100%
Mid level cloud: 30%
High level cloud: 84%
Most Significant Cloud Type: low
100%
0.0 In
06:00

S
S

 18 / 29 mph 48 / 42°F 88% 1000 mb
Low level cloud: 100%
Mid level cloud: 95%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSW
SSW

 19 / 29 mph 54 / 49°F 65% 994 mb
Low level cloud: 20%
Mid level cloud: 15%
High level cloud: 13%
Most Significant Cloud Type: low
27%
0.0 In
18:00

SSW
SSW

 19 / 32 mph 52 / 47°F 76% 998 mb
Low level cloud: 92%
Mid level cloud: 26%
High level cloud: 21%
Most Significant Cloud Type: low
100%
0.1 In
Tue 25
Mar		00:00

SSW
SSW

 15 / 25 mph 48 / 42°F 89% 997 mb
Low level cloud: 99%
Mid level cloud: 30%
High level cloud: 13%
Most Significant Cloud Type: low
100%
0.1 In
06:00

SSW
SSW

 10 / 19 mph 44 / 38°F 90% 995 mb
Low level cloud: 27%
Mid level cloud: 5%
High level cloud: 6%
Most Significant Cloud Type: low
29%
0.1 In
12:00

SSW
SSW

 21 / 36 mph 54 / 49°F 71% 999 mb
Low level cloud: 47%
Mid level cloud: 75%
High level cloud: 51%
Most Significant Cloud Type: low
79%
0.0 In
18:00

WSW
WSW

 11 / 21 mph 49 / 45°F 85% 991 mb
Low level cloud: 78%
Mid level cloud: 44%
High level cloud: 34%
Most Significant Cloud Type: low
97%
0.2 In
Wed 26
Mar		00:00

SSW
SSW

 17 / 31 mph 50 / 44°F 94% 993 mb
Low level cloud: 100%
Mid level cloud: 44%
High level cloud: 99%
Most Significant Cloud Type: low
100%
0.4 In
06:00

WNW
WNW

 13 / 26 mph 39 / 31°F 84% 992 mb
Low level cloud: 47%
Mid level cloud: 96%
High level cloud: 32%
Most Significant Cloud Type: low
84%
0.1 In
12:00

SW
SW

 18 / 32 mph 53 / 48°F 68% 1002 mb
Low level cloud: 59%
Mid level cloud: 44%
High level cloud: 77%
Most Significant Cloud Type: low
83%
0.1 In
18:00

WNW
WNW

 17 / 35 mph 45 / 37°F 72% 1001 mb
Low level cloud: 5%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
6%
0.1 In
Thu 27
Mar		00:00

SW
SW

 15 / 28 mph 48 / 43°F 82% 1005 mb
Low level cloud: 73%
Mid level cloud: 21%
High level cloud: 100%
Most Significant Cloud Type: low
92%
0.0 In
06:00

WSW
WSW

 11 / 21 mph 38 / 31°F 85% 1008 mb
Low level cloud: 9%
Mid level cloud: 27%
High level cloud: 3%
Most Significant Cloud Type: medium
52%
0.0 In
12:00

SSW
SSW

 17 / 33 mph 55 / 51°F 75% 1003 mb
Low level cloud: 86%
Mid level cloud: 66%
High level cloud: 30%
Most Significant Cloud Type: low
100%
0.0 In
18:00

W
W

 7 / 15 mph 49 / 46°F 65% 1007 mb
Low level cloud: 2%
Mid level cloud: 29%
High level cloud: 100%
Most Significant Cloud Type: medium
38%
0.0 In
Fri 28
Mar		00:00

SW
SW

 13 / 25 mph 49 / 44°F 81% 1001 mb
Low level cloud: 8%
Mid level cloud: 39%
High level cloud: 100%
Most Significant Cloud Type: medium
65%
0.0 In
06:00

NE
NE

 10 / 21 mph 42 / 37°F 97% 1001 mb
Low level cloud: 96%
Mid level cloud: 72%
High level cloud: 1%
Most Significant Cloud Type: low
100%
0.3 In
12:00

SW
SW

 12 / 25 mph 52 / 48°F 75% 995 mb
Low level cloud: 47%
Mid level cloud: 18%
High level cloud: 20%
Most Significant Cloud Type: low
55%
0.1 In
18:00

NNW
NNW

 3 / 6 mph 53 / 53°F 69% 1004 mb
Low level cloud: 16%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
43%
0.1 In
Sat 29
Mar		00:00

WNW
WNW

 10 / 22 mph 44 / 38°F 86% 1001 mb
Low level cloud: 11%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
15%
0.1 In
06:00

SSE
SSE

 6 / 13 mph 45 / 41°F 84% 1001 mb
Low level cloud: 23%
Mid level cloud: 96%
High level cloud: 98%
Most Significant Cloud Type: medium
100%
0.0 In
12:00

WNW
WNW

 12 / 26 mph 49 / 44°F 57% 1009 mb
Low level cloud: 99%
Mid level cloud: 44%
High level cloud: 45%
Most Significant Cloud Type: low
100%
0.0 In
18:00

ENE
ENE

 4 / 9 mph 52 / 51°F 89% 1005 mb
Low level cloud: 21%
Mid level cloud: 40%
High level cloud: 33%
Most Significant Cloud Type: low
39%
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