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Dereham 14 Day Long Range Forecast

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

Norfolk, United Kingdom

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

Reviewing the forecast for Dereham Over the next 14 days and the average daytime maximum temperature will be around 13°C, with a high for the two weeks of 15°C expected on the afternoon of Monday 20th. The average minimum temperature will be 9°C, dipping to its lowest on the morning of Sunday 26th at 6°C. Expect the coming 14 days to have some days seeing a little precipitation and some days with rain. The indicators are that Monday 20th will have the most precipitation with an accumulation of around 10.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 16
Oct
15:00

NNE
NNE

7 / 9 mph 58 / 56°F 70% 1027 mb
Low level cloud: 91%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

6 / 9 mph 53 / 51°F 86% 1027 mb
Low level cloud: 6%
Mid level cloud: 3%
High level cloud: 9%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

4 / 6 mph 51 / 50°F 90% 1027 mb
Low level cloud: 3%
Mid level cloud: 3%
High level cloud: 9%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 17
Oct
00:00

NNW
NNW

3 / 6 mph 49 / 48°F 89% 1027 mb
Low level cloud: 5%
Mid level cloud: 3%
High level cloud: 11%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

4 / 9 mph 48 / 46°F 92% 1026 mb
Low level cloud: 6%
Mid level cloud: 3%
High level cloud: 33%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

5 / 10 mph 46 / 44°F 93% 1026 mb
Low level cloud: 15%
Mid level cloud: 7%
High level cloud: 19%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNW
NNW

5 / 7 mph 54 / 52°F 79% 1027 mb
Low level cloud: 18%
Mid level cloud: 3%
High level cloud: 16%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

8 / 9 mph 58 / 56°F 60% 1026 mb
Low level cloud: 73%
Mid level cloud: 4%
High level cloud: 14%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

7 / 10 mph 57 / 55°F 64% 1026 mb
Low level cloud: 40%
Mid level cloud: 2%
High level cloud: 10%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

5 / 8 mph 54 / 53°F 72% 1027 mb
Low level cloud: 32%
Mid level cloud: 2%
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

ENE
ENE

5 / 8 mph 53 / 52°F 68% 1027 mb
Low level cloud: 32%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
Oct
00:00

E
E

5 / 9 mph 51 / 49°F 74% 1027 mb
Low level cloud: 6%
Mid level cloud: 1%
High level cloud: 32%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

5 / 9 mph 50 / 48°F 79% 1027 mb
Low level cloud: 41%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

6 / 10 mph 51 / 49°F 74% 1026 mb
Low level cloud: 27%
Mid level cloud: 0%
High level cloud: 22%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

9 / 12 mph 54 / 51°F 67% 1026 mb
Low level cloud: 27%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

11 / 14 mph 57 / 54°F 56% 1025 mb
Low level cloud: 53%
Mid level cloud: 0%
High level cloud: 44%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

12 / 16 mph 55 / 51°F 59% 1022 mb
Low level cloud: 21%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

9 / 14 mph 50 / 47°F 69% 1022 mb
Low level cloud: 2%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

8 / 14 mph 50 / 47°F 70% 1020 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
Oct
00:00

SE
SE

10 / 17 mph 52 / 48°F 70% 1017 mb
Low level cloud: 0%
Mid level cloud: 80%
High level cloud: 100%
Most Significant Cloud Type: medium
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

11 / 20 mph 51 / 47°F 77% 1014 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

11 / 20 mph 50 / 46°F 78% 1011 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

14 / 23 mph 52 / 48°F 74% 1008 mb
Low level cloud: 0%
Mid level cloud: 97%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

15 / 18 mph 54 / 50°F 81% 1005 mb
Low level cloud: 98%
Mid level cloud: 96%
High level cloud: 94%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

19 / 23 mph 55 / 51°F 84% 1002 mb
Low level cloud: 98%
Mid level cloud: 80%
High level cloud: 22%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

S
S

17 / 26 mph 54 / 50°F 92% 1000 mb
Low level cloud: 99%
Mid level cloud: 86%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

13 / 23 mph 53 / 49°F 96% 998 mb
Low level cloud: 100%
Mid level cloud: 77%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Mon 20
Oct
00:00

SSE
SSE

11 / 18 mph 55 / 52°F 97% 994 mb
Low level cloud: 100%
Mid level cloud: 95%
High level cloud: 82%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

SSE
SSE

11 / 17 mph 56 / 53°F 98% 991 mb
Low level cloud: 100%
Mid level cloud: 85%
High level cloud: 71%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

S
S

12 / 18 mph 57 / 54°F 96% 989 mb
Low level cloud: 97%
Mid level cloud: 20%
High level cloud: 93%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
09:00

SW
SW

15 / 19 mph 55 / 51°F 89% 990 mb
Low level cloud: 85%
Mid level cloud: 93%
High level cloud: 94%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

14 / 17 mph 60 / 59°F 71% 990 mb
Low level cloud: 69%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

10 / 15 mph 59 / 57°F 68% 988 mb
Low level cloud: 46%
Mid level cloud: 46%
High level cloud: 31%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

13 / 21 mph 54 / 49°F 88% 988 mb
Low level cloud: 38%
Mid level cloud: 30%
High level cloud: 20%
Most Significant Cloud Type: low
51%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

WSW
WSW

14 / 20 mph 51 / 47°F 91% 988 mb
Low level cloud: 96%
Mid level cloud: 71%
High level cloud: 21%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
Oct
00:00

WSW
WSW

13 / 18 mph 51 / 47°F 91% 989 mb
Low level cloud: 49%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

13 / 18 mph 50 / 45°F 91% 989 mb
Low level cloud: 41%
Mid level cloud: 46%
High level cloud: 61%
Most Significant Cloud Type: low
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

13 / 21 mph 49 / 44°F 93% 990 mb
Low level cloud: 91%
Mid level cloud: 78%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

15 / 19 mph 52 / 47°F 88% 991 mb
Low level cloud: 70%
Mid level cloud: 71%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

17 / 22 mph 55 / 51°F 78% 991 mb
Low level cloud: 92%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

16 / 21 mph 57 / 53°F 75% 991 mb
Low level cloud: 38%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

16 / 19 mph 55 / 51°F 78% 993 mb
Low level cloud: 74%
Mid level cloud: 20%
High level cloud: 7%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

17 / 24 mph 53 / 48°F 80% 994 mb
Low level cloud: 49%
Mid level cloud: 25%
High level cloud: 6%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
Oct
00:00

SW
SW

16 / 25 mph 50 / 44°F 86% 995 mb
Low level cloud: 57%
Mid level cloud: 22%
High level cloud: 21%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

14 / 23 mph 48 / 42°F 91% 995 mb
Low level cloud: 35%
Mid level cloud: 22%
High level cloud: 33%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

11 / 18 mph 48 / 44°F 91% 994 mb
Low level cloud: 31%
Mid level cloud: 73%
High level cloud: 100%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

17 / 25 mph 51 / 46°F 93% 991 mb
Low level cloud: 97%
Mid level cloud: 98%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
12:00

S
S

19 / 30 mph 56 / 52°F 95% 987 mb
Low level cloud: 100%
Mid level cloud: 65%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

18 / 28 mph 60 / 60°F 87% 986 mb
Low level cloud: 92%
Mid level cloud: 45%
High level cloud: 86%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

NW
NW

14 / 20 mph 52 / 47°F 88% 990 mb
Low level cloud: 59%
Mid level cloud: 33%
High level cloud: 35%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

11 / 17 mph 47 / 42°F 94% 995 mb
Low level cloud: 49%
Mid level cloud: 5%
High level cloud: 100%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 23
Oct
00:00

W
W

23 / 40 mph 52 / 46°F 83% 989 mb
Low level cloud: 78%
Mid level cloud: 45%
High level cloud: 10%
Most Significant Cloud Type: low
95%
0.0 In
06:00

SE
SE

8 / 13 mph 53 / 50°F 94% 999 mb
Low level cloud: 99%
Mid level cloud: 49%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

S
S

12 / 18 mph 56 / 53°F 72% 1010 mb
Low level cloud: 47%
Mid level cloud: 47%
High level cloud: 100%
Most Significant Cloud Type: low
75%
0.0 In
18:00

SW
SW

18 / 27 mph 63 / 63°F 85% 1001 mb
Low level cloud: 98%
Mid level cloud: 79%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Fri 24
Oct
00:00

SW
SW

12 / 23 mph 50 / 46°F 87% 1004 mb
Low level cloud: 10%
Mid level cloud: 27%
High level cloud: 81%
Most Significant Cloud Type: medium
56%
0.0 In
06:00

WSW
WSW

15 / 27 mph 48 / 42°F 70% 1006 mb
Low level cloud: 8%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
9%
0.0 In
12:00

W
W

21 / 35 mph 53 / 48°F 59% 1003 mb
Low level cloud: 1%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
18:00

WSW
WSW

12 / 23 mph 53 / 49°F 80% 1002 mb
Low level cloud: 19%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
24%
0.0 In
Sat 25
Oct
00:00

SW
SW

18 / 30 mph 48 / 42°F 79% 1008 mb
Low level cloud: 25%
Mid level cloud: 4%
High level cloud: 18%
Most Significant Cloud Type: low
28%
0.0 In
06:00

WSW
WSW

10 / 18 mph 43 / 38°F 93% 1004 mb
Low level cloud: 23%
Mid level cloud: 43%
High level cloud: 16%
Most Significant Cloud Type: low
40%
0.0 In
12:00

SSW
SSW

25 / 43 mph 58 / 54°F 75% 1003 mb
Low level cloud: 94%
Mid level cloud: 52%
High level cloud: 58%
Most Significant Cloud Type: low
100%
0.0 In
18:00

WSW
WSW

19 / 36 mph 50 / 44°F 67% 1003 mb
Low level cloud: 47%
Mid level cloud: 21%
High level cloud: 1%
Most Significant Cloud Type: low
54%
0.0 In
Sun 26
Oct
00:00

SSW
SSW

17 / 30 mph 59 / 55°F 93% 1000 mb
Low level cloud: 100%
Mid level cloud: 74%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
06:00

WNW
WNW

9 / 17 mph 42 / 37°F 83% 1006 mb
Low level cloud: 52%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
61%
0.0 In
12:00

SSW
SSW

21 / 40 mph 62 / 62°F 76% 997 mb
Low level cloud: 60%
Mid level cloud: 17%
High level cloud: 100%
Most Significant Cloud Type: low
78%
0.3 In
18:00

WNW
WNW

9 / 18 mph 47 / 43°F 90% 1005 mb
Low level cloud: 69%
Mid level cloud: 72%
High level cloud: 0%
Most Significant Cloud Type: low
93%
0.1 In
Mon 27
Oct
00:00

SW
SW

19 / 37 mph 53 / 48°F 74% 1003 mb
Low level cloud: 94%
Mid level cloud: 5%
High level cloud: 82%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NW
NW

16 / 32 mph 37 / 28°F 77% 1012 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 100%
Most Significant Cloud Type: medium
25%
0.4 In
12:00

WNW
WNW

11 / 22 mph 50 / 46°F 81% 1011 mb
Low level cloud: 85%
Mid level cloud: 68%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NNW
NNW

19 / 40 mph 43 / 35°F 68% 1019 mb
Low level cloud: 46%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
61%
0.2 In
Tue 28
Oct
00:00

NNW
NNW

7 / 14 mph 44 / 40°F 75% 1028 mb
Low level cloud: 10%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
12%
0.0 In
06:00

W
W

9 / 19 mph 33 / 26°F 83% 1025 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 5%
Most Significant Cloud Type: medium
2%
0.0 In
12:00

NNW
NNW

2 / 4 mph 55 / 55°F 52% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
18:00

SW
SW

17 / 36 mph 44 / 36°F 75% 1021 mb
Low level cloud: 76%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Wed 29
Oct
00:00

WSW
WSW

6 / 11 mph 43 / 39°F 79% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

W
W

20 / 43 mph 51 / 45°F 89% 1012 mb
Low level cloud: 95%
Mid level cloud: 89%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
12:00

W
W

8 / 16 mph 49 / 45°F 60% 1021 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 2%
Most Significant Cloud Type: medium
5%
0.0 In
18:00

WNW
WNW

21 / 44 mph 56 / 52°F 81% 1015 mb
Low level cloud: 70%
Mid level cloud: 7%
High level cloud: 2%
Most Significant Cloud Type: low
72%
0.0 In
Thu 30
Oct
00:00

NNW
NNW

3 / 6 mph 48 / 47°F 92% 1017 mb
Low level cloud: 15%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
14%
0.0 In
06:00

NNW
NNW

11 / 23 mph 51 / 47°F 82% 1021 mb
Low level cloud: 6%
Mid level cloud: 20%
High level cloud: 11%
Most Significant Cloud Type: medium
35%
0.0 In
12:00

ENE
ENE

4 / 8 mph 54 / 53°F 76% 1010 mb
Low level cloud: 81%
Mid level cloud: 48%
High level cloud: 8%
Most Significant Cloud Type: low
98%
0.0 In
18:00

WSW
WSW

10 / 20 mph 55 / 53°F 93% 1023 mb
Low level cloud: 35%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: low
49%
0.0 In
Fri 31
Oct
00:00

WNW
WNW

6 / 11 mph 49 / 46°F 98% 1004 mb
Low level cloud: 85%
Mid level cloud: 94%
High level cloud: 4%
Most Significant Cloud Type: low
100%
0.2 In
06:00

W
W

14 / 30 mph 48 / 43°F 86% 1020 mb
Low level cloud: 41%
Mid level cloud: 0%
High level cloud: 22%
Most Significant Cloud Type: low
44%
0.0 In
12:00

W
W

12 / 24 mph 48 / 43°F 73% 1001 mb
Low level cloud: 3%
Mid level cloud: 21%
High level cloud: 51%
Most Significant Cloud Type: medium
31%
0.0 In
18:00

WNW
WNW

11 / 23 mph 54 / 50°F 76% 1025 mb
Low level cloud: 22%
Mid level cloud: 3%
High level cloud: 15%
Most Significant Cloud Type: low
25%
0.0 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