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Bulbourne 14 Day Long Range Forecast

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

Hertfordshire, United Kingdom

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

Reviewing the forecast for Bulbourne Over the next 14 days and the average daytime maximum temperature will be around 17°C, with a high for the two weeks of 21°C expected on the afternoon of Thursday 9th. The mean minimum temperature will be 8°C, dipping to its lowest on the morning of Saturday 4th at 4°C. The next 14 days will have some days seeing a little precipitation and some days with rain. The current forecast indicates Monday 6th will have the most precipitation with an accumulation of around 8.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 02
May
12:00

N
N

4 / 5 mph 56 / 55°F 95% 1001 mb
Low level cloud: 92%
Mid level cloud: 41%
High level cloud: 17%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

5 / 6 mph 58 / 58°F 91% 1001 mb
Low level cloud: 90%
Mid level cloud: 17%
High level cloud: 46%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

9 / 12 mph 56 / 54°F 97% 1002 mb
Low level cloud: 94%
Mid level cloud: 22%
High level cloud: 85%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

11 / 15 mph 51 / 47°F 98% 1004 mb
Low level cloud: 98%
Mid level cloud: 22%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 03
May
00:00

WSW
WSW

10 / 14 mph 49 / 45°F 98% 1005 mb
Low level cloud: 100%
Mid level cloud: 43%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

10 / 14 mph 48 / 44°F 98% 1005 mb
Low level cloud: 99%
Mid level cloud: 46%
High level cloud: 35%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

11 / 16 mph 48 / 43°F 98% 1006 mb
Low level cloud: 99%
Mid level cloud: 95%
High level cloud: 6%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

15 / 21 mph 48 / 42°F 98% 1007 mb
Low level cloud: 97%
Mid level cloud: 100%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

WSW
WSW

16 / 23 mph 47 / 41°F 95% 1009 mb
Low level cloud: 90%
Mid level cloud: 98%
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

14 / 19 mph 47 / 42°F 93% 1010 mb
Low level cloud: 85%
Mid level cloud: 97%
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

WSW
WSW

9 / 14 mph 48 / 44°F 92% 1010 mb
Low level cloud: 15%
Mid level cloud: 100%
High level cloud: 100%
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 / 13 mph 47 / 43°F 94% 1011 mb
Low level cloud: 7%
Mid level cloud: 92%
High level cloud: 81%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 04
May
00:00

SSW
SSW

8 / 15 mph 45 / 40°F 95% 1011 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 58%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

7 / 14 mph 42 / 38°F 96% 1011 mb
Low level cloud: 13%
Mid level cloud: 3%
High level cloud: 8%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

6 / 10 mph 44 / 40°F 94% 1012 mb
Low level cloud: 4%
Mid level cloud: 2%
High level cloud: 10%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

9 / 10 mph 54 / 50°F 78% 1012 mb
Low level cloud: 5%
Mid level cloud: 7%
High level cloud: 53%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

9 / 10 mph 59 / 56°F 63% 1012 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 32%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

6 / 7 mph 63 / 60°F 58% 1011 mb
Low level cloud: 30%
Mid level cloud: 25%
High level cloud: 20%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

3 / 5 mph 57 / 57°F 76% 1010 mb
Low level cloud: 3%
Mid level cloud: 100%
High level cloud: 35%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

3 / 6 mph 49 / 49°F 85% 1011 mb
Low level cloud: 36%
Mid level cloud: 100%
High level cloud: 32%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 05
May
00:00

SW
SW

4 / 9 mph 47 / 44°F 91% 1011 mb
Low level cloud: 5%
Mid level cloud: 74%
High level cloud: 97%
Most Significant Cloud Type: medium
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

4 / 9 mph 45 / 43°F 92% 1010 mb
Low level cloud: 1%
Mid level cloud: 32%
High level cloud: 97%
Most Significant Cloud Type: medium
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

2 / 3 mph 48 / 47°F 88% 1010 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

5 / 6 mph 57 / 55°F 73% 1010 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 18%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

6 / 6 mph 63 / 60°F 62% 1008 mb
Low level cloud: 41%
Mid level cloud: 3%
High level cloud: 70%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

6 / 8 mph 63 / 61°F 66% 1007 mb
Low level cloud: 33%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

5 / 6 mph 58 / 56°F 88% 1007 mb
Low level cloud: 12%
Mid level cloud: 25%
High level cloud: 11%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

3 / 6 mph 50 / 49°F 92% 1007 mb
Low level cloud: 4%
Mid level cloud: 23%
High level cloud: 37%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 06
May
00:00

E
E

4 / 9 mph 48 / 46°F 95% 1006 mb
Low level cloud: 20%
Mid level cloud: 19%
High level cloud: 99%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

7 / 13 mph 49 / 46°F 94% 1005 mb
Low level cloud: 19%
Mid level cloud: 72%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

9 / 14 mph 49 / 46°F 97% 1005 mb
Low level cloud: 63%
Mid level cloud: 64%
High level cloud: 59%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

8 / 9 mph 54 / 52°F 90% 1005 mb
Low level cloud: 86%
Mid level cloud: 15%
High level cloud: 32%
Most Significant Cloud Type: low
94%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

ESE
ESE

4 / 5 mph 62 / 59°F 73% 1005 mb
Low level cloud: 40%
Mid level cloud: 46%
High level cloud: 17%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

8 / 11 mph 55 / 53°F 88% 1006 mb
Low level cloud: 75%
Mid level cloud: 70%
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

NNE
NNE

8 / 11 mph 54 / 50°F 96% 1007 mb
Low level cloud: 47%
Mid level cloud: 43%
High level cloud: 47%
Most Significant Cloud Type: low
68%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

N
N

6 / 10 mph 50 / 47°F 98% 1009 mb
Low level cloud: 51%
Mid level cloud: 44%
High level cloud: 59%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 07
May
00:00

NE
NE

8 / 14 mph 47 / 43°F 98% 1011 mb
Low level cloud: 70%
Mid level cloud: 29%
High level cloud: 14%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

9 / 13 mph 48 / 44°F 96% 1013 mb
Low level cloud: 97%
Mid level cloud: 28%
High level cloud: 97%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

9 / 13 mph 49 / 44°F 96% 1015 mb
Low level cloud: 34%
Mid level cloud: 46%
High level cloud: 6%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

11 / 13 mph 56 / 52°F 80% 1017 mb
Low level cloud: 18%
Mid level cloud: 21%
High level cloud: 1%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

10 / 11 mph 61 / 60°F 68% 1019 mb
Low level cloud: 35%
Mid level cloud: 6%
High level cloud: 18%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

8 / 9 mph 62 / 61°F 66% 1021 mb
Low level cloud: 89%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

5 / 7 mph 60 / 58°F 80% 1022 mb
Low level cloud: 58%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

4 / 7 mph 54 / 53°F 91% 1024 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 3%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 08
May
00:00

ESE
ESE

2 / 4 mph 48 / 49°F 90% 1025 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 95%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

1 / 2 mph 46 / 47°F 91% 1026 mb
Low level cloud: 2%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

2 / 3 mph 52 / 50°F 88% 1027 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 100%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

1 / 1 mph 59 / 57°F 80% 1027 mb
Low level cloud: 1%
Mid level cloud: 70%
High level cloud: 46%
Most Significant Cloud Type: medium
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNW
NNW

2 / 2 mph 65 / 64°F 70% 1027 mb
Low level cloud: 84%
Mid level cloud: 21%
High level cloud: 21%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

2 / 2 mph 68 / 66°F 64% 1026 mb
Low level cloud: 33%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

3 / 4 mph 67 / 65°F 79% 1026 mb
Low level cloud: 29%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

5 / 11 mph 54 / 53°F 88% 1027 mb
Low level cloud: 48%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 09
May
00:00

NW
NW

7 / 16 mph 52 / 50°F 95% 1018 mb
Low level cloud: 79%
Mid level cloud: 76%
High level cloud: 15%
Most Significant Cloud Type: low
100%
0.0 In
06:00

W
W

9 / 20 mph 50 / 46°F 92% 1021 mb
Low level cloud: 100%
Mid level cloud: 86%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.0 In
12:00

ENE
ENE

12 / 24 mph 63 / 63°F 71% 1032 mb
Low level cloud: 16%
Mid level cloud: 4%
High level cloud: 8%
Most Significant Cloud Type: low
18%
0.0 In
18:00

NE
NE

12 / 24 mph 56 / 53°F 82% 1024 mb
Low level cloud: 27%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
28%
0.0 In
Fri 10
May
00:00

SE
SE

2 / 5 mph 56 / 57°F 84% 1019 mb
Low level cloud: 15%
Mid level cloud: 0%
High level cloud: 10%
Most Significant Cloud Type: low
15%
0.0 In
06:00

WSW
WSW

4 / 7 mph 53 / 52°F 89% 1027 mb
Low level cloud: 71%
Mid level cloud: 44%
High level cloud: 5%
Most Significant Cloud Type: low
87%
0.0 In
12:00

ESE
ESE

9 / 19 mph 64 / 65°F 64% 1027 mb
Low level cloud: 20%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.0 In
18:00

E
E

10 / 20 mph 66 / 66°F 80% 1018 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
Sat 11
May
00:00

ENE
ENE

7 / 14 mph 49 / 46°F 92% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

ENE
ENE

6 / 13 mph 54 / 52°F 92% 1018 mb
Low level cloud: 6%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
5%
0.0 In
12:00

E
E

10 / 21 mph 66 / 66°F 64% 1023 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
1%
0.0 In
18:00

E
E

12 / 25 mph 62 / 62°F 82% 1015 mb
Low level cloud: 2%
Mid level cloud: 30%
High level cloud: 17%
Most Significant Cloud Type: medium
36%
0.0 In
Sun 12
May
00:00

ENE
ENE

7 / 15 mph 48 / 45°F 87% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

ESE
ESE

4 / 8 mph 58 / 58°F 91% 1015 mb
Low level cloud: 38%
Mid level cloud: 10%
High level cloud: 92%
Most Significant Cloud Type: low
52%
0.0 In
12:00

E
E

11 / 23 mph 67 / 67°F 65% 1022 mb
Low level cloud: 10%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
10%
0.0 In
18:00

SW
SW

6 / 12 mph 69 / 69°F 84% 1013 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.3 In
Mon 13
May
00:00

E
E

7 / 15 mph 48 / 45°F 81% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

S
S

4 / 8 mph 58 / 58°F 89% 1012 mb
Low level cloud: 6%
Mid level cloud: 12%
High level cloud: 100%
Most Significant Cloud Type: medium
32%
0.0 In
12:00

SE
SE

10 / 21 mph 68 / 68°F 69% 1016 mb
Low level cloud: 71%
Mid level cloud: 35%
High level cloud: 28%
Most Significant Cloud Type: low
86%
0.0 In
18:00

ENE
ENE

2 / 4 mph 60 / 60°F 97% 1008 mb
Low level cloud: 39%
Mid level cloud: 63%
High level cloud: 100%
Most Significant Cloud Type: low
72%
0.1 In
Tue 14
May
00:00

S
S

6 / 12 mph 56 / 55°F 99% 1011 mb
Low level cloud: 92%
Mid level cloud: 43%
High level cloud: 57%
Most Significant Cloud Type: low
100%
0.2 In
06:00

W
W

5 / 11 mph 56 / 55°F 97% 1005 mb
Low level cloud: 71%
Mid level cloud: 16%
High level cloud: 100%
Most Significant Cloud Type: low
88%
0.3 In
12:00

SSW
SSW

12 / 25 mph 57 / 54°F 92% 1007 mb
Low level cloud: 97%
Mid level cloud: 58%
High level cloud: 1%
Most Significant Cloud Type: low
100%
0.1 In
18:00

WSW
WSW

2 / 5 mph 71 / 71°F 77% 1002 mb
Low level cloud: 10%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
16%
0.0 In
Wed 15
May
00:00

S
S

4 / 9 mph 55 / 54°F 99% 1000 mb
Low level cloud: 72%
Mid level cloud: 52%
High level cloud: 32%
Most Significant Cloud Type: low
93%
0.1 In
06:00

SSE
SSE

9 / 19 mph 51 / 47°F 97% 993 mb
Low level cloud: 94%
Mid level cloud: 32%
High level cloud: 10%
Most Significant Cloud Type: low
100%
0.3 In
12:00

SW
SW

13 / 28 mph 59 / 59°F 85% 995 mb
Low level cloud: 93%
Mid level cloud: 46%
High level cloud: 7%
Most Significant Cloud Type: low
100%
0.2 In
18:00

SSW
SSW

19 / 39 mph 56 / 51°F 96% 989 mb
Low level cloud: 99%
Mid level cloud: 92%
High level cloud: 96%
Most Significant Cloud Type: low
100%
0.2 In
Thu 16
May
00:00

SSW
SSW

4 / 9 mph 50 / 48°F 95% 995 mb
Low level cloud: 13%
Mid level cloud: 32%
High level cloud: 81%
Most Significant Cloud Type: low
33%
0.2 In
06:00

SSW
SSW

17 / 37 mph 50 / 44°F 92% 998 mb
Low level cloud: 84%
Mid level cloud: 90%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 In
12:00

NW
NW

7 / 15 mph 48 / 45°F 92% 1002 mb
Low level cloud: 89%
Mid level cloud: 92%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
18:00

SSE
SSE

13 / 28 mph 56 / 53°F 85% 1002 mb
Low level cloud: 32%
Mid level cloud: 32%
High level cloud: 43%
Most Significant Cloud Type: low
48%
0.1 In
Fri 17
May
00:00

NE
NE

8 / 17 mph 45 / 41°F 91% 1009 mb
Low level cloud: 80%
Mid level cloud: 72%
High level cloud: 8%
Most Significant Cloud Type: low
100%
0.0 In
06:00

SSE
SSE

9 / 18 mph 51 / 47°F 97% 1004 mb
Low level cloud: 84%
Mid level cloud: 37%
High level cloud: 22%
Most Significant Cloud Type: low
99%
0.0 In
12:00

ENE
ENE

11 / 23 mph 48 / 43°F 86% 1011 mb
Low level cloud: 96%
Mid level cloud: 78%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
18:00

S
S

3 / 6 mph 62 / 62°F 84% 1005 mb
Low level cloud: 21%
Mid level cloud: 18%
High level cloud: 38%
Most Significant Cloud Type: low
31%
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