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Alderney 14 Day Long Range Forecast

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

Dorset, United Kingdom

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

Taking a look at Alderney over the coming two weeks and the average daytime maximum temperature will be around 18°C, with a high for the two weeks of 26°C expected on the evening of Saturday 22nd. The mean minimum temperature will be 13°C, dipping to its lowest on the morning of Saturday 22nd at 11°C. Expect the following 14 days ahead to have some days seeing a little precipitation and some days with rain. The current forecast indicates Saturday 22nd will have the most precipitation with an accumulation of around 16.0mm. On the whole winds are likely to be moderate. The strongest wind will be experienced on the morning of Sunday 23rd, coming from a south westerly direction, and reaching around 35mph. However, the forecast suggests maximum gusts on Saturday afternoon.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sat 22
Sep
15:00

S
S

26 / 30 mph 70 / 70°F 90% 1014 mb
Low level cloud: 100%
Mid level cloud: 99%
High level cloud: 10%
Most Significant Cloud Type: low
100%
Expect 0.22 In of precipitation over the past 3 hours.
0.22 In
18:00

WSW
WSW

32 / 37 mph 78 / 84°F 93% 1011 mb
Low level cloud: 100%
Mid level cloud: 98%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.13 In of precipitation over the past 3 hours.
0.13 In
21:00

WSW
WSW

28 / 32 mph 75 / 80°F 94% 1013 mb
Low level cloud: 96%
Mid level cloud: 78%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
Sun 23
Sep
00:00

WSW
WSW

27 / 31 mph 68 / 68°F 95% 1013 mb
Low level cloud: 94%
Mid level cloud: 71%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
03:00

WSW
WSW

23 / 27 mph 67 / 67°F 96% 1014 mb
Low level cloud: 95%
Mid level cloud: 81%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
06:00

WSW
WSW

23 / 27 mph 66 / 67°F 96% 1013 mb
Low level cloud: 95%
Mid level cloud: 71%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
09:00

WSW
WSW

37 / 42 mph 68 / 68°F 93% 1013 mb
Low level cloud: 95%
Mid level cloud: 77%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.05 In of precipitation over the past 3 hours.
0.05 In
12:00

N
N

27 / 43 mph 53 / 46°F 86% 1018 mb
Low level cloud: 91%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
15:00

N
N

24 / 39 mph 53 / 46°F 74% 1023 mb
Low level cloud: 19%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
24%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

N
N

21 / 34 mph 56 / 51°F 64% 1027 mb
Low level cloud: 12%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
11%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

N
N

19 / 32 mph 56 / 52°F 64% 1031 mb
Low level cloud: 8%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Mon 24
Sep
00:00

NNE
NNE

18 / 30 mph 55 / 50°F 63% 1033 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 2%
Most Significant Cloud Type: high
1%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

NNE
NNE

15 / 25 mph 54 / 50°F 64% 1034 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

NNE
NNE

15 / 22 mph 54 / 50°F 67% 1036 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: low
4%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

NE
NE

13 / 18 mph 55 / 51°F 67% 1037 mb
Low level cloud: 10%
Mid level cloud: 4%
High level cloud: 8%
Most Significant Cloud Type: low
11%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

NNE
NNE

11 / 16 mph 56 / 52°F 67% 1038 mb
Low level cloud: 5%
Mid level cloud: 8%
High level cloud: 1%
Most Significant Cloud Type: low
7%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

NNE
NNE

13 / 18 mph 56 / 53°F 65% 1038 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 17%
Most Significant Cloud Type: medium
7%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

NE
NE

13 / 21 mph 56 / 52°F 60% 1037 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 53%
Most Significant Cloud Type: medium
7%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

ENE
ENE

14 / 26 mph 55 / 51°F 59% 1039 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Tue 25
Sep
00:00

E
E

13 / 17 mph 59 / 59°F 60% 1038 mb
Low level cloud: 1%
Mid level cloud: 3%
High level cloud: 5%
Most Significant Cloud Type: medium
5%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

ESE
ESE

12 / 19 mph 57 / 54°F 62% 1038 mb
Low level cloud: 8%
Mid level cloud: 1%
High level cloud: 6%
Most Significant Cloud Type: low
9%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

ESE
ESE

13 / 21 mph 56 / 52°F 67% 1037 mb
Low level cloud: 37%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

ESE
ESE

14 / 16 mph 60 / 59°F 67% 1038 mb
Low level cloud: 13%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
13%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

E
E

15 / 17 mph 64 / 64°F 64% 1037 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

E
E

15 / 18 mph 66 / 66°F 65% 1035 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
2%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

E
E

16 / 18 mph 64 / 64°F 66% 1034 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

E
E

14 / 17 mph 61 / 61°F 63% 1034 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Wed 26
Sep
00:00

ESE
ESE

12 / 16 mph 60 / 60°F 60% 1033 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

ESE
ESE

8 / 12 mph 58 / 56°F 58% 1032 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

ESE
ESE

7 / 11 mph 57 / 55°F 60% 1031 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

ESE
ESE

8 / 9 mph 62 / 61°F 60% 1031 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

E
E

7 / 9 mph 66 / 65°F 55% 1031 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

ENE
ENE

9 / 10 mph 68 / 67°F 58% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

ENE
ENE

9 / 10 mph 66 / 65°F 64% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

ENE
ENE

7 / 9 mph 62 / 62°F 63% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Thu 27
Sep
00:00

ENE
ENE

5 / 6 mph 63 / 63°F 60% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

NE
NE

4 / 6 mph 61 / 61°F 58% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

NNE
NNE

5 / 8 mph 59 / 59°F 59% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

N
N

6 / 7 mph 64 / 63°F 63% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

N
N

8 / 9 mph 68 / 67°F 67% 1028 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 1%
Most Significant Cloud Type: medium
1%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

NNW
NNW

10 / 12 mph 70 / 69°F 68% 1026 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 2%
Most Significant Cloud Type: medium
8%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

NNW
NNW

9 / 10 mph 68 / 67°F 75% 1027 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 2%
Most Significant Cloud Type: medium
9%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

NNE
NNE

18 / 24 mph 64 / 64°F 88% 1028 mb
Low level cloud: 43%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
47%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Fri 28
Sep
00:00

NE
NE

20 / 32 mph 60 / 60°F 84% 1028 mb
Low level cloud: 89%
Mid level cloud: 12%
High level cloud: 11%
Most Significant Cloud Type: low
94%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

ENE
ENE

18 / 31 mph 58 / 54°F 87% 1028 mb
Low level cloud: 90%
Mid level cloud: 10%
High level cloud: 56%
Most Significant Cloud Type: low
99%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

NE
NE

18 / 31 mph 57 / 53°F 84% 1028 mb
Low level cloud: 59%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
60%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

NE
NE

18 / 21 mph 61 / 60°F 83% 1029 mb
Low level cloud: 85%
Mid level cloud: 0%
High level cloud: 15%
Most Significant Cloud Type: low
86%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

NE
NE

17 / 20 mph 65 / 64°F 81% 1029 mb
Low level cloud: 68%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
67%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

NE
NE

15 / 18 mph 67 / 66°F 74% 1028 mb
Low level cloud: 19%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: low
20%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

NE
NE

11 / 13 mph 65 / 64°F 62% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 70%
Most Significant Cloud Type: high
69%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

NE
NE

9 / 11 mph 61 / 61°F 59% 1029 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 3%
Most Significant Cloud Type: medium
3%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sat 29
Sep
00:00

E
E

11 / 15 mph 59 / 56°F 68% 1031 mb
Low level cloud: 45%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
45%
0.00 In
06:00

W
W

17 / 27 mph 60 / 60°F 78% 1015 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 67%
Most Significant Cloud Type: medium
15%
0.00 In
12:00

N
N

9 / 10 mph 61 / 61°F 66% 1028 mb
Low level cloud: 18%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.00 In
18:00

SSW
SSW

4 / 5 mph 62 / 62°F 75% 1020 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.00 In
Sun 30
Sep
00:00

WSW
WSW

12 / 16 mph 58 / 56°F 68% 1017 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.00 In
06:00

W
W

25 / 52 mph 55 / 49°F 84% 1014 mb
Low level cloud: 93%
Mid level cloud: 10%
High level cloud: 6%
Most Significant Cloud Type: low
96%
0.00 In
12:00

NW
NW

14 / 21 mph 58 / 55°F 81% 1022 mb
Low level cloud: 84%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
84%
0.00 In
18:00

NW
NW

25 / 29 mph 61 / 61°F 60% 1024 mb
Low level cloud: 6%
Mid level cloud: 0%
High level cloud: 29%
Most Significant Cloud Type: low
9%
0.00 In
Mon 01
Oct
00:00

NNE
NNE

21 / 36 mph 55 / 49°F 69% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 13%
Most Significant Cloud Type: high
13%
0.00 In
06:00

WNW
WNW

15 / 23 mph 54 / 50°F 67% 1030 mb
Low level cloud: 90%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
89%
0.00 In
12:00

ENE
ENE

11 / 14 mph 56 / 53°F 61% 1033 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.00 In
18:00

W
W

18 / 26 mph 56 / 52°F 73% 1029 mb
Low level cloud: 52%
Mid level cloud: 12%
High level cloud: 6%
Most Significant Cloud Type: low
57%
0.01 In
Tue 02
Oct
00:00

ESE
ESE

9 / 10 mph 61 / 61°F 67% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.00 In
06:00

WSW
WSW

23 / 42 mph 57 / 52°F 86% 1025 mb
Low level cloud: 84%
Mid level cloud: 45%
High level cloud: 10%
Most Significant Cloud Type: low
100%
0.02 In
12:00

SE
SE

7 / 8 mph 68 / 68°F 55% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.00 In
18:00

WNW
WNW

19 / 25 mph 61 / 61°F 79% 1024 mb
Low level cloud: 30%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
31%
0.03 In
Wed 03
Oct
00:00

SSW
SSW

7 / 14 mph 57 / 56°F 67% 1017 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 8%
Most Significant Cloud Type: medium
2%
0.00 In
06:00

NW
NW

16 / 26 mph 55 / 51°F 69% 1023 mb
Low level cloud: 67%
Mid level cloud: 10%
High level cloud: 50%
Most Significant Cloud Type: low
76%
0.01 In
12:00

WNW
WNW

12 / 18 mph 58 / 55°F 76% 1022 mb
Low level cloud: 33%
Mid level cloud: 14%
High level cloud: 40%
Most Significant Cloud Type: low
43%
0.00 In
18:00

NW
NW

23 / 29 mph 59 / 55°F 65% 1023 mb
Low level cloud: 4%
Mid level cloud: 32%
High level cloud: 12%
Most Significant Cloud Type: medium
42%
0.03 In
Thu 04
Oct
00:00

WNW
WNW

11 / 17 mph 60 / 60°F 88% 1028 mb
Low level cloud: 76%
Mid level cloud: 30%
High level cloud: 16%
Most Significant Cloud Type: low
88%
0.00 In
06:00

WNW
WNW

19 / 34 mph 55 / 50°F 74% 1024 mb
Low level cloud: 55%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: low
75%
0.03 In
12:00

W
W

17 / 19 mph 62 / 62°F 91% 1032 mb
Low level cloud: 38%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
39%
0.01 In
18:00

WSW
WSW

38 / 48 mph 63 / 63°F 85% 1015 mb
Low level cloud: 73%
Mid level cloud: 5%
High level cloud: 60%
Most Significant Cloud Type: low
81%
0.05 In
Fri 05
Oct
00:00

WNW
WNW

15 / 22 mph 60 / 60°F 91% 1034 mb
Low level cloud: 28%
Mid level cloud: 9%
High level cloud: 2%
Most Significant Cloud Type: low
31%
0.00 In
06:00

WNW
WNW

41 / 60 mph 54 / 47°F 64% 1010 mb
Low level cloud: 37%
Mid level cloud: 49%
High level cloud: 17%
Most Significant Cloud Type: low
55%
0.09 In
12:00

NW
NW

10 / 11 mph 63 / 63°F 84% 1036 mb
Low level cloud: 8%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: low
9%
0.00 In
18:00

NW
NW

26 / 42 mph 54 / 48°F 65% 1017 mb
Low level cloud: 4%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
33%
0.04 In
Sat 06
Oct
00:00

N
N

15 / 23 mph 58 / 55°F 81% 1035 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 31%
Most Significant Cloud Type: medium
5%
0.00 In
06:00

WNW
WNW

25 / 39 mph 52 / 45°F 65% 1020 mb
Low level cloud: 69%
Mid level cloud: 44%
High level cloud: 22%
Most Significant Cloud Type: low
86%
0.03 In
12:00

NNE
NNE

6 / 7 mph 60 / 60°F 67% 1036 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 31%
Most Significant Cloud Type: medium
14%
0.00 In
18:00

WSW
WSW

39 / 50 mph 61 / 61°F 82% 1012 mb
Low level cloud: 88%
Mid level cloud: 61%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.08 In
Sun 07
Oct
00:00

N
N

9 / 16 mph 58 / 56°F 87% 1036 mb
Low level cloud: 17%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
17%
0.00 In
06:00

NW
NW

31 / 64 mph 50 / 42°F 70% 1011 mb
Low level cloud: 66%
Mid level cloud: 24%
High level cloud: 8%
Most Significant Cloud Type: low
75%
0.11 In
12:00

ESE
ESE

13 / 15 mph 61 / 61°F 73% 1037 mb
Low level cloud: 36%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
35%
0.01 In

Other Locations Near to Alderney

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