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Chatham 14 Day Long Range Forecast

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

Kent, United Kingdom

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

Taking a look at Chatham over the coming two weeks 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 Friday 21st. The mean minimum temperature will be 10°C, dipping to its lowest on the morning of Wednesday 12th at 7°C. Expect the following 14 days ahead to have some days seeing a little precipitation and some days with rain. Predictions are 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

S
S

 6 / 9 mph 59 / 56°F 69% 1020 mb
Low level cloud: 37%
Mid level cloud: 28%
High level cloud: 12%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

 7 / 10 mph 58 / 55°F 81% 1019 mb
Low level cloud: 18%
Mid level cloud: 30%
High level cloud: 33%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 4 / 9 mph 52 / 49°F 88% 1020 mb
Low level cloud: 17%
Mid level cloud: 40%
High level cloud: 18%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 13
Jun		00:00

SW
SW

 4 / 8 mph 49 / 47°F 89% 1019 mb
Low level cloud: 3%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 5 / 9 mph 47 / 45°F 89% 1017 mb
Low level cloud: 1%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 5 / 8 mph 49 / 47°F 86% 1016 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 10 / 13 mph 58 / 54°F 68% 1016 mb
Low level cloud: 27%
Mid level cloud: 3%
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

SW
SW

 17 / 22 mph 60 / 55°F 70% 1014 mb
Low level cloud: 40%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 15 / 20 mph 57 / 53°F 74% 1012 mb
Low level cloud: 15%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

 12 / 19 mph 55 / 51°F 81% 1010 mb
Low level cloud: 56%
Mid level cloud: 76%
High level cloud: 21%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 17 / 28 mph 52 / 46°F 88% 1009 mb
Low level cloud: 81%
Mid level cloud: 75%
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

S
S

 18 / 28 mph 51 / 46°F 93% 1006 mb
Low level cloud: 97%
Mid level cloud: 64%
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

 15 / 23 mph 53 / 49°F 96% 1004 mb
Low level cloud: 97%
Mid level cloud: 21%
High level cloud: 3%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 13 / 19 mph 56 / 53°F 94% 1004 mb
Low level cloud: 96%
Mid level cloud: 55%
High level cloud: 10%
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 / 20 mph 61 / 59°F 82% 1004 mb
Low level cloud: 57%
Mid level cloud: 45%
High level cloud: 10%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 17 / 22 mph 61 / 60°F 77% 1004 mb
Low level cloud: 71%
Mid level cloud: 30%
High level cloud: 2%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 19 / 24 mph 62 / 61°F 67% 1003 mb
Low level cloud: 6%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

 14 / 19 mph 60 / 59°F 74% 1002 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 4%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 10 / 17 mph 54 / 49°F 89% 1002 mb
Low level cloud: 3%
Mid level cloud: 27%
High level cloud: 22%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 15
Jun		00:00

SSW
SSW

 13 / 22 mph 52 / 47°F 90% 1000 mb
Low level cloud: 28%
Mid level cloud: 98%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 13 / 21 mph 50 / 45°F 92% 1000 mb
Low level cloud: 14%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

SW
SW

 15 / 21 mph 51 / 45°F 89% 1002 mb
Low level cloud: 12%
Mid level cloud: 14%
High level cloud: 6%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 22 / 28 mph 57 / 53°F 80% 1003 mb
Low level cloud: 87%
Mid level cloud: 44%
High level cloud: 5%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 24 / 34 mph 58 / 53°F 86% 1003 mb
Low level cloud: 69%
Mid level cloud: 39%
High level cloud: 100%
Most Significant Cloud Type: low
94%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

SW
SW

 20 / 29 mph 58 / 53°F 88% 1003 mb
Low level cloud: 55%
Mid level cloud: 52%
High level cloud: 40%
Most Significant Cloud Type: low
78%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

SSW
SSW

 17 / 26 mph 55 / 50°F 91% 1003 mb
Low level cloud: 68%
Mid level cloud: 61%
High level cloud: 9%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 16 / 27 mph 55 / 49°F 90% 1003 mb
Low level cloud: 54%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 16
Jun		00:00

SW
SW

 14 / 22 mph 54 / 50°F 87% 1003 mb
Low level cloud: 27%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 11 / 18 mph 51 / 47°F 91% 1004 mb
Low level cloud: 4%
Mid level cloud: 3%
High level cloud: 9%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 14 / 20 mph 54 / 49°F 85% 1004 mb
Low level cloud: 8%
Mid level cloud: 7%
High level cloud: 5%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 18 / 23 mph 61 / 60°F 70% 1005 mb
Low level cloud: 46%
Mid level cloud: 29%
High level cloud: 13%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 20 / 25 mph 63 / 62°F 68% 1006 mb
Low level cloud: 78%
Mid level cloud: 18%
High level cloud: 10%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

 19 / 25 mph 64 / 63°F 63% 1007 mb
Low level cloud: 13%
Mid level cloud: 12%
High level cloud: 61%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

 15 / 22 mph 62 / 60°F 75% 1008 mb
Low level cloud: 1%
Mid level cloud: 52%
High level cloud: 57%
Most Significant Cloud Type: medium
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 11 / 19 mph 55 / 51°F 90% 1009 mb
Low level cloud: 11%
Mid level cloud: 46%
High level cloud: 8%
Most Significant Cloud Type: medium
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 17
Jun		00:00

SW
SW

 8 / 15 mph 53 / 50°F 95% 1011 mb
Low level cloud: 26%
Mid level cloud: 18%
High level cloud: 6%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 7 / 13 mph 51 / 49°F 95% 1011 mb
Low level cloud: 28%
Mid level cloud: 12%
High level cloud: 20%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 8 / 12 mph 56 / 53°F 90% 1012 mb
Low level cloud: 28%
Mid level cloud: 28%
High level cloud: 32%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 11 / 14 mph 64 / 62°F 70% 1013 mb
Low level cloud: 45%
Mid level cloud: 12%
High level cloud: 32%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 11 / 15 mph 66 / 65°F 65% 1013 mb
Low level cloud: 71%
Mid level cloud: 25%
High level cloud: 8%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

 11 / 15 mph 67 / 66°F 67% 1013 mb
Low level cloud: 65%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

 9 / 11 mph 68 / 66°F 76% 1014 mb
Low level cloud: 10%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 6 / 10 mph 60 / 58°F 92% 1016 mb
Low level cloud: 3%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 18
Jun		00:00

WSW
WSW

 4 / 8 mph 57 / 56°F 93% 1016 mb
Low level cloud: 14%
Mid level cloud: 6%
High level cloud: 21%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

 4 / 8 mph 54 / 54°F 93% 1016 mb
Low level cloud: 9%
Mid level cloud: 8%
High level cloud: 81%
Most Significant Cloud Type: medium
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

 6 / 9 mph 57 / 54°F 89% 1017 mb
Low level cloud: 21%
Mid level cloud: 4%
High level cloud: 6%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNW
NNW

 6 / 8 mph 65 / 62°F 69% 1018 mb
Low level cloud: 39%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNW
NNW

 8 / 9 mph 69 / 67°F 58% 1018 mb
Low level cloud: 22%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNW
NNW

 8 / 11 mph 70 / 68°F 55% 1018 mb
Low level cloud: 20%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

N
N

 7 / 10 mph 66 / 64°F 71% 1018 mb
Low level cloud: 28%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNW
NNW

 6 / 11 mph 58 / 55°F 86% 1020 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 51%
Most Significant Cloud Type: high
51%
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

 8 / 16 mph 55 / 53°F 95% 1017 mb
Low level cloud: 15%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
21%
0.0 In
06:00

WNW
WNW

 9 / 18 mph 56 / 53°F 82% 1018 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

NNE
NNE

 18 / 38 mph 59 / 59°F 94% 1014 mb
Low level cloud: 99%
Mid level cloud: 75%
High level cloud: 7%
Most Significant Cloud Type: low
100%
0.0 In
18:00

S
S

 10 / 20 mph 63 / 63°F 88% 1006 mb
Low level cloud: 12%
Mid level cloud: 100%
High level cloud: 33%
Most Significant Cloud Type: medium
100%
0.0 In
Thu 20
Jun		00:00

WSW
WSW

 9 / 18 mph 50 / 47°F 85% 1010 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 67%
Most Significant Cloud Type: medium
8%
0.0 In
06:00

NW
NW

 6 / 13 mph 55 / 54°F 82% 1022 mb
Low level cloud: 3%
Mid level cloud: 3%
High level cloud: 16%
Most Significant Cloud Type: low
5%
0.0 In
12:00

SW
SW

 16 / 34 mph 59 / 56°F 88% 1015 mb
Low level cloud: 98%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
18:00

ENE
ENE

 17 / 36 mph 61 / 61°F 80% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
5%
0.0 In
Fri 21
Jun		00:00

WSW
WSW

 7 / 16 mph 57 / 56°F 95% 1016 mb
Low level cloud: 23%
Mid level cloud: 5%
High level cloud: 17%
Most Significant Cloud Type: low
27%
0.0 In
06:00

SSW
SSW

 7 / 15 mph 62 / 62°F 95% 1008 mb
Low level cloud: 95%
Mid level cloud: 5%
High level cloud: 9%
Most Significant Cloud Type: low
97%
0.0 In
12:00

SW
SW

 13 / 27 mph 65 / 65°F 84% 1016 mb
Low level cloud: 87%
Mid level cloud: 36%
High level cloud: 21%
Most Significant Cloud Type: low
100%
0.0 In
18:00

S
S

 16 / 34 mph 62 / 62°F 89% 1004 mb
Low level cloud: 55%
Mid level cloud: 12%
High level cloud: 19%
Most Significant Cloud Type: low
61%
0.1 In
Sat 22
Jun		00:00

S
S

 12 / 26 mph 62 / 62°F 84% 1011 mb
Low level cloud: 53%
Mid level cloud: 29%
High level cloud: 6%
Most Significant Cloud Type: low
63%
0.0 In
06:00

SSW
SSW

 17 / 35 mph 58 / 54°F 95% 1004 mb
Low level cloud: 99%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
12:00

S
S

 19 / 40 mph 59 / 59°F 89% 1004 mb
Low level cloud: 99%
Mid level cloud: 95%
High level cloud: 7%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SSW
SSW

 15 / 31 mph 56 / 53°F 91% 1002 mb
Low level cloud: 14%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
18%
0.6 In
Sun 23
Jun		00:00

WSW
WSW

 8 / 17 mph 56 / 54°F 94% 1006 mb
Low level cloud: 13%
Mid level cloud: 6%
High level cloud: 2%
Most Significant Cloud Type: low
15%
0.0 In
06:00

SSW
SSW

 10 / 21 mph 57 / 55°F 96% 1005 mb
Low level cloud: 91%
Mid level cloud: 87%
High level cloud: 34%
Most Significant Cloud Type: low
100%
0.0 In
12:00

WSW
WSW

 13 / 26 mph 64 / 64°F 68% 1009 mb
Low level cloud: 33%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: low
47%
0.0 In
18:00

W
W

 11 / 24 mph 66 / 66°F 70% 1011 mb
Low level cloud: 25%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
27%
0.1 In
Mon 24
Jun		00:00

WNW
WNW

 7 / 15 mph 56 / 54°F 93% 1016 mb
Low level cloud: 4%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
0.0 In
06:00

WSW
WSW

 5 / 10 mph 62 / 62°F 87% 1017 mb
Low level cloud: 15%
Mid level cloud: 5%
High level cloud: 3%
Most Significant Cloud Type: low
16%
0.0 In
12:00

WNW
WNW

 3 / 7 mph 69 / 69°F 55% 1018 mb
Low level cloud: 62%
Mid level cloud: 4%
High level cloud: 14%
Most Significant Cloud Type: low
64%
0.0 In
18:00

S
S

 8 / 17 mph 69 / 69°F 73% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
1%
0.0 In
Tue 25
Jun		00:00

SSE
SSE

 4 / 9 mph 62 / 62°F 85% 1019 mb
Low level cloud: 17%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
17%
0.0 In
06:00

SSE
SSE

 3 / 6 mph 60 / 60°F 81% 1015 mb
Low level cloud: 78%
Mid level cloud: 61%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

ESE
ESE

 9 / 18 mph 68 / 68°F 61% 1017 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 7%
Most Significant Cloud Type: medium
9%
0.0 In
18:00

SW
SW

 10 / 20 mph 69 / 69°F 74% 1014 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.1 In
Wed 26
Jun		00:00

E
E

 6 / 13 mph 62 / 62°F 90% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
1%
0.0 In
06:00

SW
SW

 7 / 15 mph 60 / 60°F 92% 1015 mb
Low level cloud: 54%
Mid level cloud: 19%
High level cloud: 15%
Most Significant Cloud Type: low
62%
0.0 In
12:00

S
S

 11 / 23 mph 74 / 77°F 62% 1011 mb
Low level cloud: 9%
Mid level cloud: 7%
High level cloud: 6%
Most Significant Cloud Type: low
12%
0.0 In
18:00

SSW
SSW

 7 / 15 mph 70 / 70°F 66% 1015 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
0.0 In
Thu 27
Jun		00:00

WNW
WNW

 5 / 11 mph 64 / 64°F 89% 1014 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: medium
13%
0.0 In
06:00

SE
SE

 5 / 11 mph 64 / 64°F 85% 1012 mb
Low level cloud: 35%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
38%
0.0 In
12:00

NW
NW

 8 / 16 mph 70 / 70°F 54% 1017 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 100%
Most Significant Cloud Type: medium
25%
0.0 In
18:00

WNW
WNW

 10 / 21 mph 62 / 62°F 95% 1009 mb
Low level cloud: 53%
Mid level cloud: 100%
High level cloud: 78%
Most Significant Cloud Type: low
97%
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