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Patmore Heath 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Patmore Heath

Hertfordshire, United Kingdom

Long range weather outlook for Patmore Heath includes 14 day forecast summary:

The forecast for Patmore Heath in the coming two weeks is predicting the average daytime maximum temperature will be around 17°C, with a high for the two weeks of 20°C expected on the afternoon of Thursday 9th. The average minimum temperature will be 10°C, dipping to its lowest on the morning of Sunday 5th at 7°C. Expect the coming 14 days to have some days seeing a little precipitation and some days with rain. Current predictions suggest Monday 6th will have the most precipitation with an accumulation of around 8.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 05
May
12:00

SE
SE

9 / 11 mph 61 / 60°F 64% 1008 mb
Low level cloud: 77%
Mid level cloud: 7%
High level cloud: 87%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

11 / 15 mph 59 / 56°F 76% 1007 mb
Low level cloud: 59%
Mid level cloud: 30%
High level cloud: 35%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

9 / 12 mph 56 / 53°F 90% 1006 mb
Low level cloud: 50%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

6 / 10 mph 51 / 49°F 97% 1007 mb
Low level cloud: 50%
Mid level cloud: 46%
High level cloud: 10%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 06
May
00:00

SSE
SSE

4 / 6 mph 50 / 49°F 97% 1007 mb
Low level cloud: 50%
Mid level cloud: 41%
High level cloud: 2%
Most Significant Cloud Type: low
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

2 / 4 mph 49 / 49°F 95% 1007 mb
Low level cloud: 67%
Mid level cloud: 24%
High level cloud: 7%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

1 / 2 mph 51 / 50°F 93% 1007 mb
Low level cloud: 26%
Mid level cloud: 27%
High level cloud: 8%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

3 / 4 mph 57 / 57°F 82% 1008 mb
Low level cloud: 86%
Mid level cloud: 23%
High level cloud: 5%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

8 / 13 mph 59 / 56°F 80% 1008 mb
Low level cloud: 55%
Mid level cloud: 44%
High level cloud: 9%
Most Significant Cloud Type: low
72%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

E
E

10 / 17 mph 56 / 54°F 85% 1009 mb
Low level cloud: 78%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

ENE
ENE

7 / 10 mph 56 / 52°F 90% 1010 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
21:00

NNE
NNE

6 / 9 mph 50 / 48°F 96% 1012 mb
Low level cloud: 76%
Mid level cloud: 24%
High level cloud: 73%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 07
May
00:00

NNE
NNE

6 / 11 mph 48 / 45°F 98% 1014 mb
Low level cloud: 67%
Mid level cloud: 18%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

6 / 11 mph 47 / 44°F 98% 1015 mb
Low level cloud: 82%
Mid level cloud: 9%
High level cloud: 12%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

6 / 10 mph 49 / 46°F 95% 1017 mb
Low level cloud: 75%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

6 / 8 mph 58 / 55°F 80% 1019 mb
Low level cloud: 63%
Mid level cloud: 5%
High level cloud: 4%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

6 / 8 mph 60 / 60°F 70% 1021 mb
Low level cloud: 92%
Mid level cloud: 9%
High level cloud: 6%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

4 / 6 mph 60 / 60°F 80% 1022 mb
Low level cloud: 81%
Mid level cloud: 29%
High level cloud: 75%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

2 / 3 mph 61 / 60°F 86% 1023 mb
Low level cloud: 17%
Mid level cloud: 29%
High level cloud: 32%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

4 / 7 mph 53 / 52°F 92% 1025 mb
Low level cloud: 2%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 08
May
00:00

SSE
SSE

2 / 4 mph 49 / 50°F 91% 1026 mb
Low level cloud: 3%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

3 / 6 mph 49 / 48°F 92% 1027 mb
Low level cloud: 10%
Mid level cloud: 46%
High level cloud: 19%
Most Significant Cloud Type: medium
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

5 / 8 mph 50 / 47°F 92% 1027 mb
Low level cloud: 19%
Mid level cloud: 33%
High level cloud: 6%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

5 / 6 mph 57 / 54°F 84% 1028 mb
Low level cloud: 47%
Mid level cloud: 24%
High level cloud: 4%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

5 / 6 mph 60 / 59°F 75% 1028 mb
Low level cloud: 95%
Mid level cloud: 16%
High level cloud: 6%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

5 / 7 mph 60 / 59°F 77% 1027 mb
Low level cloud: 81%
Mid level cloud: 21%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

4 / 6 mph 60 / 59°F 86% 1027 mb
Low level cloud: 69%
Mid level cloud: 12%
High level cloud: 100%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

7 / 12 mph 52 / 49°F 95% 1028 mb
Low level cloud: 90%
Mid level cloud: 14%
High level cloud: 37%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 09
May
00:00

SE
SE

6 / 12 mph 51 / 49°F 94% 1028 mb
Low level cloud: 33%
Mid level cloud: 53%
High level cloud: 100%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

4 / 9 mph 50 / 49°F 96% 1027 mb
Low level cloud: 79%
Mid level cloud: 32%
High level cloud: 8%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

5 / 8 mph 54 / 51°F 92% 1027 mb
Low level cloud: 72%
Mid level cloud: 19%
High level cloud: 2%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

6 / 7 mph 59 / 59°F 82% 1027 mb
Low level cloud: 93%
Mid level cloud: 28%
High level cloud: 44%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

5 / 6 mph 64 / 64°F 71% 1026 mb
Low level cloud: 88%
Mid level cloud: 28%
High level cloud: 70%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

4 / 5 mph 67 / 64°F 71% 1025 mb
Low level cloud: 30%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

4 / 6 mph 65 / 62°F 86% 1025 mb
Low level cloud: 34%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

5 / 10 mph 56 / 55°F 93% 1025 mb
Low level cloud: 36%
Mid level cloud: 60%
High level cloud: 95%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 10
May
00:00

SSW
SSW

4 / 7 mph 55 / 55°F 94% 1024 mb
Low level cloud: 22%
Mid level cloud: 33%
High level cloud: 67%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

2 / 4 mph 54 / 55°F 94% 1024 mb
Low level cloud: 16%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

2 / 4 mph 56 / 56°F 94% 1024 mb
Low level cloud: 24%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

2 / 2 mph 61 / 61°F 84% 1023 mb
Low level cloud: 16%
Mid level cloud: 65%
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

NNW
NNW

3 / 4 mph 65 / 64°F 76% 1023 mb
Low level cloud: 59%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

4 / 6 mph 67 / 64°F 79% 1021 mb
Low level cloud: 39%
Mid level cloud: 43%
High level cloud: 42%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

6 / 9 mph 63 / 62°F 88% 1021 mb
Low level cloud: 15%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

5 / 11 mph 54 / 53°F 84% 1022 mb
Low level cloud: 18%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 11
May
00:00

SE
SE

4 / 9 mph 53 / 52°F 83% 1022 mb
Low level cloud: 14%
Mid level cloud: 29%
High level cloud: 20%
Most Significant Cloud Type: low
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

4 / 9 mph 52 / 51°F 80% 1021 mb
Low level cloud: 11%
Mid level cloud: 23%
High level cloud: 87%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

4 / 7 mph 55 / 52°F 80% 1021 mb
Low level cloud: 9%
Mid level cloud: 27%
High level cloud: 6%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

6 / 7 mph 63 / 60°F 68% 1022 mb
Low level cloud: 2%
Mid level cloud: 28%
High level cloud: 33%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

7 / 9 mph 67 / 64°F 65% 1022 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 8%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

8 / 10 mph 67 / 65°F 68% 1021 mb
Low level cloud: 5%
Mid level cloud: 29%
High level cloud: 32%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

8 / 11 mph 63 / 61°F 89% 1021 mb
Low level cloud: 19%
Mid level cloud: 16%
High level cloud: 13%
Most Significant Cloud Type: low
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

6 / 11 mph 54 / 52°F 96% 1022 mb
Low level cloud: 15%
Mid level cloud: 19%
High level cloud: 7%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 12
May
00:00

SE
SE

7 / 12 mph 52 / 50°F 94% 1022 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 85%
Most Significant Cloud Type: medium
21%
0.0 In
06:00

ESE
ESE

4 / 7 mph 55 / 55°F 89% 1021 mb
Low level cloud: 39%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
50%
0.0 In
12:00

ENE
ENE

11 / 22 mph 53 / 49°F 72% 1027 mb
Low level cloud: 96%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
95%
0.0 In
18:00

NNE
NNE

8 / 15 mph 58 / 57°F 75% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: high
17%
0.0 In
Mon 13
May
00:00

NE
NE

11 / 23 mph 41 / 34°F 96% 1019 mb
Low level cloud: 31%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
30%
0.0 In
06:00

W
W

5 / 11 mph 58 / 58°F 93% 1008 mb
Low level cloud: 18%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
23%
0.0 In
12:00

SSE
SSE

10 / 19 mph 67 / 67°F 82% 1008 mb
Low level cloud: 90%
Mid level cloud: 32%
High level cloud: 20%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NE
NE

11 / 24 mph 64 / 64°F 87% 1012 mb
Low level cloud: 45%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
48%
0.0 In
Tue 14
May
00:00

SE
SE

3 / 6 mph 60 / 60°F 95% 1008 mb
Low level cloud: 26%
Mid level cloud: 4%
High level cloud: 3%
Most Significant Cloud Type: low
28%
0.1 In
06:00

N
N

10 / 20 mph 52 / 49°F 98% 1009 mb
Low level cloud: 95%
Mid level cloud: 6%
High level cloud: 9%
Most Significant Cloud Type: low
98%
0.0 In
12:00

ESE
ESE

11 / 23 mph 67 / 67°F 78% 1005 mb
Low level cloud: 56%
Mid level cloud: 9%
High level cloud: 73%
Most Significant Cloud Type: low
67%
0.0 In
18:00

ENE
ENE

5 / 11 mph 60 / 60°F 96% 1007 mb
Low level cloud: 63%
Mid level cloud: 96%
High level cloud: 11%
Most Significant Cloud Type: low
97%
0.0 In
Wed 15
May
00:00

NNE
NNE

6 / 14 mph 56 / 54°F 98% 1004 mb
Low level cloud: 93%
Mid level cloud: 29%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.4 In
06:00

S
S

2 / 5 mph 58 / 59°F 97% 1007 mb
Low level cloud: 72%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: low
72%
0.0 In
12:00

NE
NE

15 / 31 mph 51 / 46°F 88% 1003 mb
Low level cloud: 61%
Mid level cloud: 84%
High level cloud: 32%
Most Significant Cloud Type: low
94%
0.2 In
18:00

NNE
NNE

13 / 26 mph 55 / 52°F 94% 1005 mb
Low level cloud: 98%
Mid level cloud: 45%
High level cloud: 98%
Most Significant Cloud Type: low
100%
0.0 In
Thu 16
May
00:00

NE
NE

21 / 43 mph 43 / 34°F 90% 1010 mb
Low level cloud: 97%
Mid level cloud: 72%
High level cloud: 95%
Most Significant Cloud Type: low
100%
0.5 In
06:00

NNE
NNE

13 / 28 mph 45 / 38°F 96% 1008 mb
Low level cloud: 100%
Mid level cloud: 81%
High level cloud: 6%
Most Significant Cloud Type: low
100%
0.9 In
12:00

NE
NE

23 / 48 mph 46 / 37°F 94% 1014 mb
Low level cloud: 100%
Mid level cloud: 77%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
18:00

NNE
NNE

13 / 27 mph 51 / 47°F 77% 1017 mb
Low level cloud: 27%
Mid level cloud: 44%
High level cloud: 10%
Most Significant Cloud Type: low
43%
0.0 In
Fri 17
May
00:00

NE
NE

21 / 43 mph 46 / 38°F 74% 1017 mb
Low level cloud: 89%
Mid level cloud: 94%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NNE
NNE

10 / 21 mph 43 / 37°F 90% 1022 mb
Low level cloud: 24%
Mid level cloud: 1%
High level cloud: 61%
Most Significant Cloud Type: low
31%
0.0 In
12:00

ENE
ENE

19 / 40 mph 48 / 41°F 81% 1017 mb
Low level cloud: 95%
Mid level cloud: 100%
High level cloud: 82%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NNE
NNE

15 / 31 mph 48 / 42°F 76% 1024 mb
Low level cloud: 17%
Mid level cloud: 1%
High level cloud: 12%
Most Significant Cloud Type: low
18%
0.0 In
Sat 18
May
00:00

NNE
NNE

15 / 31 mph 45 / 38°F 78% 1016 mb
Low level cloud: 66%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
93%
0.0 In
06:00

N
N

9 / 19 mph 40 / 34°F 89% 1026 mb
Low level cloud: 35%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
34%
0.0 In
12:00

NNE
NNE

13 / 26 mph 51 / 47°F 74% 1015 mb
Low level cloud: 79%
Mid level cloud: 89%
High level cloud: 2%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NNE
NNE

10 / 21 mph 50 / 47°F 75% 1025 mb
Low level cloud: 3%
Mid level cloud: 4%
High level cloud: 8%
Most Significant Cloud Type: low
5%
0.0 In
Sun 19
May
00:00

NNE
NNE

6 / 12 mph 43 / 39°F 96% 1017 mb
Low level cloud: 22%
Mid level cloud: 3%
High level cloud: 20%
Most Significant Cloud Type: low
25%
0.0 In
06:00

N
N

7 / 15 mph 44 / 39°F 91% 1026 mb
Low level cloud: 26%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
29%
0.0 In
12:00

ENE
ENE

7 / 15 mph 53 / 50°F 67% 1015 mb
Low level cloud: 91%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NE
NE

6 / 14 mph 56 / 55°F 78% 1026 mb
Low level cloud: 24%
Mid level cloud: 1%
High level cloud: 12%
Most Significant Cloud Type: low
25%
0.0 In
Mon 20
May
00:00

NW
NW

4 / 8 mph 46 / 44°F 95% 1016 mb
Low level cloud: 28%
Mid level cloud: 16%
High level cloud: 5%
Most Significant Cloud Type: low
33%
0.1 In
06:00

WNW
WNW

2 / 5 mph 53 / 54°F 85% 1026 mb
Low level cloud: 12%
Mid level cloud: 13%
High level cloud: 11%
Most Significant Cloud Type: low
18%
0.0 In
12:00

NNW
NNW

4 / 9 mph 58 / 58°F 64% 1016 mb
Low level cloud: 22%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
29%
0.0 In
18:00

ENE
ENE

9 / 19 mph 57 / 55°F 87% 1024 mb
Low level cloud: 9%
Mid level cloud: 14%
High level cloud: 22%
Most Significant Cloud Type: low
16%
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