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Normandy 14 Day Long Range Forecast

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

Surrey, United Kingdom

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

Over the next 14 days the Normandy forecast suggests the average daytime maximum temperature will be around 18°C, with a high for the two weeks of 21°C expected on the afternoon of Tuesday 18th. The mean minimum temperature will be 10°C, dipping to its lowest on the morning of Wednesday 12th at 6°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. The indicators are that Saturday 15th 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
Wed 12
Jun
15:00

W
W

9 / 10 mph 62 / 60°F 56% 1020 mb
Low level cloud: 52%
Mid level cloud: 46%
High level cloud: 15%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

7 / 8 mph 61 / 59°F 68% 1019 mb
Low level cloud: 8%
Mid level cloud: 21%
High level cloud: 13%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

4 / 7 mph 51 / 49°F 87% 1020 mb
Low level cloud: 3%
Mid level cloud: 11%
High level cloud: 11%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 13
Jun
00:00

SW
SW

4 / 9 mph 47 / 46°F 91% 1019 mb
Low level cloud: 2%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

4 / 9 mph 44 / 41°F 91% 1017 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 37%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

4 / 7 mph 49 / 47°F 81% 1016 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 97%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

12 / 15 mph 58 / 55°F 68% 1015 mb
Low level cloud: 44%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

17 / 20 mph 59 / 54°F 71% 1013 mb
Low level cloud: 30%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

16 / 20 mph 57 / 52°F 78% 1011 mb
Low level cloud: 4%
Mid level cloud: 47%
High level cloud: 100%
Most Significant Cloud Type: medium
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

17 / 24 mph 53 / 48°F 90% 1009 mb
Low level cloud: 87%
Mid level cloud: 83%
High level cloud: 14%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

19 / 28 mph 51 / 46°F 94% 1007 mb
Low level cloud: 100%
Mid level cloud: 86%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 14
Jun
00:00

SSW
SSW

15 / 22 mph 54 / 50°F 97% 1005 mb
Low level cloud: 100%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

10 / 17 mph 55 / 52°F 94% 1003 mb
Low level cloud: 32%
Mid level cloud: 46%
High level cloud: 6%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

10 / 14 mph 56 / 52°F 92% 1003 mb
Low level cloud: 56%
Mid level cloud: 86%
High level cloud: 10%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

12 / 17 mph 57 / 53°F 88% 1003 mb
Low level cloud: 25%
Mid level cloud: 45%
High level cloud: 4%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

18 / 21 mph 64 / 62°F 65% 1003 mb
Low level cloud: 48%
Mid level cloud: 18%
High level cloud: 1%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

20 / 23 mph 63 / 62°F 61% 1002 mb
Low level cloud: 70%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

14 / 18 mph 60 / 56°F 74% 1001 mb
Low level cloud: 5%
Mid level cloud: 20%
High level cloud: 99%
Most Significant Cloud Type: medium
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

9 / 15 mph 54 / 49°F 86% 1001 mb
Low level cloud: 42%
Mid level cloud: 45%
High level cloud: 3%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 15
Jun
00:00

SSW
SSW

10 / 15 mph 51 / 47°F 95% 1000 mb
Low level cloud: 26%
Mid level cloud: 93%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

WSW
WSW

11 / 18 mph 47 / 43°F 95% 1001 mb
Low level cloud: 27%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

13 / 19 mph 51 / 46°F 90% 1002 mb
Low level cloud: 10%
Mid level cloud: 4%
High level cloud: 21%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

21 / 26 mph 58 / 54°F 86% 1002 mb
Low level cloud: 92%
Mid level cloud: 44%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

21 / 32 mph 58 / 53°F 87% 1002 mb
Low level cloud: 90%
Mid level cloud: 63%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

SSW
SSW

17 / 25 mph 55 / 50°F 92% 1002 mb
Low level cloud: 65%
Mid level cloud: 54%
High level cloud: 18%
Most Significant Cloud Type: low
86%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

SSW
SSW

16 / 26 mph 55 / 50°F 91% 1002 mb
Low level cloud: 70%
Mid level cloud: 51%
High level cloud: 0%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

16 / 26 mph 54 / 49°F 90% 1003 mb
Low level cloud: 99%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 16
Jun
00:00

SW
SW

11 / 17 mph 51 / 47°F 94% 1003 mb
Low level cloud: 15%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

12 / 21 mph 49 / 44°F 91% 1003 mb
Low level cloud: 25%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

13 / 19 mph 54 / 49°F 83% 1004 mb
Low level cloud: 23%
Mid level cloud: 24%
High level cloud: 5%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

17 / 21 mph 60 / 60°F 74% 1005 mb
Low level cloud: 70%
Mid level cloud: 18%
High level cloud: 17%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

19 / 24 mph 65 / 64°F 63% 1006 mb
Low level cloud: 75%
Mid level cloud: 21%
High level cloud: 20%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

17 / 20 mph 64 / 64°F 67% 1006 mb
Low level cloud: 49%
Mid level cloud: 46%
High level cloud: 99%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

14 / 18 mph 61 / 61°F 77% 1007 mb
Low level cloud: 23%
Mid level cloud: 91%
High level cloud: 33%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

8 / 14 mph 56 / 52°F 93% 1009 mb
Low level cloud: 19%
Mid level cloud: 46%
High level cloud: 18%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 17
Jun
00:00

SSW
SSW

6 / 11 mph 51 / 49°F 97% 1010 mb
Low level cloud: 36%
Mid level cloud: 15%
High level cloud: 5%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

5 / 10 mph 49 / 47°F 97% 1011 mb
Low level cloud: 48%
Mid level cloud: 15%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

6 / 8 mph 57 / 53°F 91% 1012 mb
Low level cloud: 39%
Mid level cloud: 12%
High level cloud: 87%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

9 / 11 mph 65 / 62°F 67% 1012 mb
Low level cloud: 20%
Mid level cloud: 10%
High level cloud: 18%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

10 / 11 mph 67 / 67°F 61% 1013 mb
Low level cloud: 92%
Mid level cloud: 16%
High level cloud: 2%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

9 / 11 mph 69 / 67°F 67% 1013 mb
Low level cloud: 31%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

8 / 11 mph 67 / 65°F 80% 1014 mb
Low level cloud: 27%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

5 / 11 mph 58 / 56°F 93% 1016 mb
Low level cloud: 28%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 18
Jun
00:00

WNW
WNW

4 / 9 mph 55 / 54°F 93% 1016 mb
Low level cloud: 5%
Mid level cloud: 6%
High level cloud: 18%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

4 / 7 mph 51 / 50°F 95% 1017 mb
Low level cloud: 26%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

5 / 7 mph 55 / 53°F 89% 1018 mb
Low level cloud: 10%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNW
NNW

6 / 7 mph 65 / 62°F 71% 1018 mb
Low level cloud: 64%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNW
NNW

9 / 10 mph 69 / 67°F 58% 1018 mb
Low level cloud: 6%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNW
NNW

9 / 11 mph 70 / 68°F 56% 1018 mb
Low level cloud: 63%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNW
NNW

9 / 10 mph 70 / 68°F 66% 1019 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

NNW
NNW

6 / 11 mph 57 / 55°F 84% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 13%
Most Significant Cloud Type: high
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 19
Jun
00:00

WNW
WNW

7 / 14 mph 55 / 53°F 95% 1018 mb
Low level cloud: 6%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
7%
0.0 In
06:00

WNW
WNW

7 / 15 mph 57 / 56°F 89% 1019 mb
Low level cloud: 19%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
18%
0.0 In
12:00

NNE
NNE

15 / 32 mph 59 / 56°F 91% 1014 mb
Low level cloud: 97%
Mid level cloud: 98%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

S
S

9 / 18 mph 63 / 63°F 82% 1005 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
Thu 20
Jun
00:00

SW
SW

7 / 15 mph 51 / 48°F 93% 1011 mb
Low level cloud: 2%
Mid level cloud: 14%
High level cloud: 16%
Most Significant Cloud Type: medium
20%
0.0 In
06:00

NW
NW

4 / 9 mph 57 / 56°F 86% 1023 mb
Low level cloud: 8%
Mid level cloud: 3%
High level cloud: 32%
Most Significant Cloud Type: low
13%
0.0 In
12:00

SW
SW

14 / 30 mph 63 / 63°F 81% 1015 mb
Low level cloud: 91%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
97%
0.0 In
18:00

E
E

15 / 31 mph 64 / 64°F 74% 1013 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 14%
Most Significant Cloud Type: medium
4%
0.0 In
Fri 21
Jun
00:00

SW
SW

6 / 12 mph 57 / 56°F 97% 1016 mb
Low level cloud: 36%
Mid level cloud: 13%
High level cloud: 22%
Most Significant Cloud Type: low
43%
0.1 In
06:00

S
S

8 / 18 mph 59 / 59°F 94% 1007 mb
Low level cloud: 67%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
68%
0.0 In
12:00

SW
SW

12 / 26 mph 65 / 65°F 86% 1016 mb
Low level cloud: 85%
Mid level cloud: 46%
High level cloud: 4%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SSW
SSW

19 / 39 mph 63 / 63°F 83% 1002 mb
Low level cloud: 74%
Mid level cloud: 16%
High level cloud: 6%
Most Significant Cloud Type: low
80%
0.0 In
Sat 22
Jun
00:00

S
S

14 / 30 mph 62 / 62°F 90% 1010 mb
Low level cloud: 56%
Mid level cloud: 5%
High level cloud: 35%
Most Significant Cloud Type: low
62%
0.0 In
06:00

S
S

16 / 34 mph 56 / 52°F 96% 1002 mb
Low level cloud: 100%
Mid level cloud: 43%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.1 In
12:00

S
S

17 / 36 mph 58 / 54°F 97% 1003 mb
Low level cloud: 100%
Mid level cloud: 44%
High level cloud: 50%
Most Significant Cloud Type: low
100%
0.1 In
18:00

SSW
SSW

14 / 29 mph 60 / 60°F 81% 1001 mb
Low level cloud: 18%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
33%
0.3 In
Sun 23
Jun
00:00

WSW
WSW

8 / 17 mph 56 / 54°F 96% 1007 mb
Low level cloud: 18%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
20%
0.1 In
06:00

SSW
SSW

10 / 21 mph 59 / 57°F 89% 1005 mb
Low level cloud: 65%
Mid level cloud: 29%
High level cloud: 32%
Most Significant Cloud Type: low
79%
0.0 In
12:00

W
W

14 / 30 mph 64 / 64°F 68% 1010 mb
Low level cloud: 47%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: low
56%
0.0 In
18:00

W
W

13 / 27 mph 65 / 65°F 72% 1012 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.1 In
Mon 24
Jun
00:00

W
W

5 / 11 mph 56 / 55°F 94% 1016 mb
Low level cloud: 4%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
0.0 In
06:00

WSW
WSW

4 / 9 mph 61 / 60°F 89% 1017 mb
Low level cloud: 24%
Mid level cloud: 9%
High level cloud: 4%
Most Significant Cloud Type: low
27%
0.0 In
12:00

W
W

5 / 10 mph 69 / 69°F 56% 1018 mb
Low level cloud: 89%
Mid level cloud: 3%
High level cloud: 33%
Most Significant Cloud Type: low
93%
0.0 In
18:00

S
S

10 / 20 mph 70 / 70°F 72% 1016 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 1%
Most Significant Cloud Type: medium
5%
0.0 In
Tue 25
Jun
00:00

SSE
SSE

4 / 8 mph 61 / 61°F 87% 1019 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 5%
Most Significant Cloud Type: medium
2%
0.0 In
06:00

ESE
ESE

4 / 8 mph 60 / 60°F 85% 1014 mb
Low level cloud: 75%
Mid level cloud: 43%
High level cloud: 48%
Most Significant Cloud Type: low
96%
0.0 In
12:00

SSE
SSE

10 / 21 mph 72 / 72°F 60% 1016 mb
Low level cloud: 7%
Mid level cloud: 6%
High level cloud: 2%
Most Significant Cloud Type: low
9%
0.0 In
18:00

SW
SW

10 / 21 mph 70 / 70°F 69% 1014 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.1 In
Wed 26
Jun
00:00

ESE
ESE

5 / 11 mph 62 / 62°F 85% 1013 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 19%
Most Significant Cloud Type: medium
15%
0.0 In
06:00

SSW
SSW

5 / 10 mph 61 / 61°F 93% 1015 mb
Low level cloud: 69%
Mid level cloud: 16%
High level cloud: 6%
Most Significant Cloud Type: low
75%
0.0 In
12:00

SSW
SSW

13 / 27 mph 73 / 77°F 69% 1011 mb
Low level cloud: 59%
Mid level cloud: 13%
High level cloud: 5%
Most Significant Cloud Type: low
64%
0.0 In
18:00

S
S

8 / 17 mph 71 / 71°F 66% 1014 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
Thu 27
Jun
00:00

WNW
WNW

5 / 10 mph 63 / 63°F 94% 1015 mb
Low level cloud: 20%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
20%
0.0 In
06:00

SE
SE

7 / 15 mph 66 / 66°F 88% 1012 mb
Low level cloud: 11%
Mid level cloud: 5%
High level cloud: 12%
Most Significant Cloud Type: low
14%
0.0 In
12:00

NW
NW

10 / 21 mph 70 / 70°F 57% 1018 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
2%
0.0 In
18:00

WSW
WSW

6 / 12 mph 60 / 60°F 95% 1010 mb
Low level cloud: 74%
Mid level cloud: 82%
High level cloud: 89%
Most Significant Cloud Type: low
100%
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