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Sanderstead 14 Day Long Range Forecast

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

Surrey, United Kingdom

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

Reviewing the forecast for Sanderstead Over the next 14 days and the average daytime maximum temperature will be around 18°C, with a high for the two weeks of 22°C expected on the afternoon of Saturday 25th. The mean minimum temperature will be 11°C, dipping to its lowest on the morning of Tuesday 21st at 7°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. It looks like Wednesday 22nd will have the most precipitation with an accumulation of around 9.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sat 18
May		15:00

NE
NE

 6 / 8 mph 66 / 64°F 74% 1012 mb
Low level cloud: 77%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

N
N

 5 / 8 mph 66 / 64°F 77% 1012 mb
Low level cloud: 67%
Mid level cloud: 41%
High level cloud: 15%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

 7 / 11 mph 58 / 57°F 95% 1013 mb
Low level cloud: 30%
Mid level cloud: 23%
High level cloud: 7%
Most Significant Cloud Type: low
39%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Sun 19
May		00:00

N
N

 5 / 8 mph 53 / 52°F 96% 1013 mb
Low level cloud: 46%
Mid level cloud: 18%
High level cloud: 17%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

 5 / 7 mph 52 / 51°F 95% 1013 mb
Low level cloud: 36%
Mid level cloud: 46%
High level cloud: 13%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 6 / 9 mph 54 / 51°F 92% 1014 mb
Low level cloud: 41%
Mid level cloud: 12%
High level cloud: 4%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 7 / 9 mph 64 / 62°F 71% 1014 mb
Low level cloud: 8%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

 9 / 10 mph 70 / 68°F 57% 1014 mb
Low level cloud: 4%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 9 / 12 mph 69 / 68°F 64% 1013 mb
Low level cloud: 13%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

 9 / 12 mph 66 / 64°F 79% 1014 mb
Low level cloud: 3%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

 6 / 8 mph 59 / 58°F 91% 1014 mb
Low level cloud: 8%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May		00:00

NNE
NNE

 6 / 8 mph 56 / 54°F 89% 1014 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

 6 / 8 mph 52 / 50°F 82% 1014 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 10 / 14 mph 50 / 46°F 86% 1014 mb
Low level cloud: 9%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 12 / 14 mph 59 / 56°F 73% 1014 mb
Low level cloud: 52%
Mid level cloud: 17%
High level cloud: 1%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 12 / 14 mph 64 / 64°F 66% 1012 mb
Low level cloud: 78%
Mid level cloud: 22%
High level cloud: 1%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 11 / 15 mph 66 / 64°F 67% 1011 mb
Low level cloud: 46%
Mid level cloud: 17%
High level cloud: 9%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

 11 / 13 mph 64 / 62°F 75% 1011 mb
Low level cloud: 22%
Mid level cloud: 9%
High level cloud: 4%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 8 / 10 mph 56 / 54°F 84% 1011 mb
Low level cloud: 1%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May		00:00

NNE
NNE

 7 / 8 mph 52 / 50°F 86% 1011 mb
Low level cloud: 1%
Mid level cloud: 3%
High level cloud: 3%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

 6 / 8 mph 48 / 45°F 88% 1010 mb
Low level cloud: 5%
Mid level cloud: 5%
High level cloud: 47%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 6 / 9 mph 50 / 46°F 83% 1009 mb
Low level cloud: 7%
Mid level cloud: 10%
High level cloud: 100%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 8 / 9 mph 60 / 57°F 70% 1009 mb
Low level cloud: 10%
Mid level cloud: 13%
High level cloud: 100%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 8 / 9 mph 63 / 62°F 71% 1008 mb
Low level cloud: 85%
Mid level cloud: 62%
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

NNE
NNE

 6 / 9 mph 63 / 63°F 72% 1008 mb
Low level cloud: 76%
Mid level cloud: 75%
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

NNE
NNE

 7 / 10 mph 63 / 62°F 80% 1008 mb
Low level cloud: 48%
Mid level cloud: 54%
High level cloud: 100%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

 5 / 7 mph 58 / 58°F 92% 1009 mb
Low level cloud: 19%
Mid level cloud: 63%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Wed 22
May		00:00

NNW
NNW

 7 / 9 mph 56 / 55°F 93% 1008 mb
Low level cloud: 26%
Mid level cloud: 60%
High level cloud: 100%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

 8 / 12 mph 54 / 52°F 98% 1007 mb
Low level cloud: 84%
Mid level cloud: 64%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

NW
NW

 9 / 16 mph 53 / 50°F 98% 1006 mb
Low level cloud: 79%
Mid level cloud: 81%
High level cloud: 89%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
09:00

WNW
WNW

 10 / 13 mph 55 / 53°F 97% 1006 mb
Low level cloud: 99%
Mid level cloud: 76%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

W
W

 13 / 15 mph 59 / 56°F 96% 1006 mb
Low level cloud: 96%
Mid level cloud: 59%
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

W
W

 11 / 13 mph 62 / 60°F 93% 1007 mb
Low level cloud: 39%
Mid level cloud: 67%
High level cloud: 99%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

 9 / 10 mph 60 / 60°F 88% 1007 mb
Low level cloud: 20%
Mid level cloud: 67%
High level cloud: 32%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 5 / 6 mph 58 / 57°F 91% 1008 mb
Low level cloud: 10%
Mid level cloud: 46%
High level cloud: 13%
Most Significant Cloud Type: medium
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May		00:00

SW
SW

 6 / 10 mph 54 / 52°F 92% 1008 mb
Low level cloud: 13%
Mid level cloud: 57%
High level cloud: 8%
Most Significant Cloud Type: medium
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 6 / 10 mph 51 / 49°F 94% 1009 mb
Low level cloud: 25%
Mid level cloud: 30%
High level cloud: 5%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 7 / 10 mph 55 / 51°F 89% 1010 mb
Low level cloud: 32%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

 10 / 13 mph 61 / 61°F 75% 1011 mb
Low level cloud: 88%
Mid level cloud: 27%
High level cloud: 4%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

 12 / 15 mph 65 / 64°F 66% 1013 mb
Low level cloud: 59%
Mid level cloud: 11%
High level cloud: 3%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

 10 / 12 mph 66 / 65°F 62% 1013 mb
Low level cloud: 20%
Mid level cloud: 13%
High level cloud: 19%
Most Significant Cloud Type: low
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

 7 / 8 mph 66 / 63°F 74% 1013 mb
Low level cloud: 3%
Mid level cloud: 14%
High level cloud: 33%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

 3 / 5 mph 57 / 58°F 91% 1015 mb
Low level cloud: 4%
Mid level cloud: 16%
High level cloud: 13%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 24
May		00:00

ESE
ESE

 2 / 4 mph 55 / 56°F 92% 1015 mb
Low level cloud: 3%
Mid level cloud: 11%
High level cloud: 10%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

 3 / 5 mph 53 / 53°F 93% 1015 mb
Low level cloud: 16%
Mid level cloud: 13%
High level cloud: 35%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

 3 / 5 mph 55 / 55°F 88% 1015 mb
Low level cloud: 29%
Mid level cloud: 83%
High level cloud: 32%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 5 / 6 mph 64 / 63°F 74% 1015 mb
Low level cloud: 75%
Mid level cloud: 32%
High level cloud: 42%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

 2 / 2 mph 64 / 64°F 78% 1015 mb
Low level cloud: 74%
Mid level cloud: 73%
High level cloud: 17%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

W
W

 8 / 12 mph 61 / 60°F 90% 1015 mb
Low level cloud: 65%
Mid level cloud: 59%
High level cloud: 13%
Most Significant Cloud Type: low
87%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

WNW
WNW

 7 / 10 mph 59 / 56°F 93% 1016 mb
Low level cloud: 30%
Mid level cloud: 44%
High level cloud: 8%
Most Significant Cloud Type: low
46%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

WNW
WNW

 4 / 6 mph 56 / 56°F 95% 1017 mb
Low level cloud: 39%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sat 25
May		00:00

NE
NE

 15 / 31 mph 56 / 52°F 90% 1016 mb
Low level cloud: 93%
Mid level cloud: 15%
High level cloud: 4%
Most Significant Cloud Type: low
99%
0.0 In
06:00

NW
NW

 4 / 9 mph 63 / 63°F 86% 1024 mb
Low level cloud: 12%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
13%
0.0 In
12:00

SW
SW

 8 / 16 mph 62 / 62°F 49% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 81%
Most Significant Cloud Type: high
81%
0.0 In
18:00

SE
SE

 7 / 15 mph 71 / 71°F 65% 1020 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
Sun 26
May		00:00

ENE
ENE

 5 / 11 mph 60 / 60°F 89% 1014 mb
Low level cloud: 2%
Mid level cloud: 70%
High level cloud: 39%
Most Significant Cloud Type: medium
77%
0.0 In
06:00

SE
SE

 5 / 11 mph 61 / 61°F 84% 1020 mb
Low level cloud: 17%
Mid level cloud: 11%
High level cloud: 73%
Most Significant Cloud Type: low
29%
0.0 In
12:00

SSW
SSW

 12 / 25 mph 63 / 63°F 61% 1007 mb
Low level cloud: 3%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
57%
0.0 In
18:00

ESE
ESE

 8 / 17 mph 69 / 69°F 80% 1012 mb
Low level cloud: 6%
Mid level cloud: 65%
High level cloud: 100%
Most Significant Cloud Type: medium
85%
0.0 In
Mon 27
May		00:00

SW
SW

 6 / 13 mph 53 / 51°F 94% 1008 mb
Low level cloud: 21%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.1 In
06:00

SW
SW

 6 / 12 mph 58 / 57°F 95% 1011 mb
Low level cloud: 51%
Mid level cloud: 10%
High level cloud: 12%
Most Significant Cloud Type: low
56%
0.4 In
12:00

WSW
WSW

 7 / 15 mph 55 / 53°F 92% 1009 mb
Low level cloud: 68%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
18:00

SE
SE

 9 / 19 mph 62 / 62°F 79% 1010 mb
Low level cloud: 13%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: medium
84%
0.0 In
Tue 28
May		00:00

WSW
WSW

 10 / 20 mph 53 / 50°F 97% 1010 mb
Low level cloud: 72%
Mid level cloud: 98%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.5 In
06:00

SSW
SSW

 6 / 13 mph 56 / 55°F 93% 1010 mb
Low level cloud: 52%
Mid level cloud: 45%
High level cloud: 21%
Most Significant Cloud Type: low
69%
0.1 In
12:00

WNW
WNW

 10 / 22 mph 62 / 62°F 70% 1011 mb
Low level cloud: 59%
Mid level cloud: 16%
High level cloud: 4%
Most Significant Cloud Type: low
65%
0.3 In
18:00

SW
SW

 9 / 19 mph 60 / 60°F 79% 1011 mb
Low level cloud: 11%
Mid level cloud: 51%
High level cloud: 21%
Most Significant Cloud Type: medium
83%
0.1 In
Wed 29
May		00:00

W
W

 5 / 11 mph 61 / 61°F 96% 1014 mb
Low level cloud: 17%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
22%
0.1 In
06:00

WSW
WSW

 8 / 16 mph 55 / 53°F 92% 1012 mb
Low level cloud: 63%
Mid level cloud: 44%
High level cloud: 12%
Most Significant Cloud Type: low
80%
0.0 In
12:00

SSW
SSW

 8 / 16 mph 56 / 54°F 97% 1013 mb
Low level cloud: 87%
Mid level cloud: 91%
High level cloud: 25%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SW
SW

 10 / 22 mph 61 / 61°F 82% 1013 mb
Low level cloud: 44%
Mid level cloud: 32%
High level cloud: 8%
Most Significant Cloud Type: low
56%
0.0 In
Thu 30
May		00:00

SW
SW

 11 / 22 mph 56 / 53°F 96% 1008 mb
Low level cloud: 99%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.3 In
06:00

S
S

 4 / 9 mph 59 / 60°F 90% 1012 mb
Low level cloud: 81%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SW
SW

 14 / 30 mph 61 / 61°F 69% 1009 mb
Low level cloud: 87%
Mid level cloud: 27%
High level cloud: 9%
Most Significant Cloud Type: low
97%
0.0 In
18:00

S
S

 8 / 16 mph 64 / 64°F 82% 1007 mb
Low level cloud: 10%
Mid level cloud: 45%
High level cloud: 19%
Most Significant Cloud Type: medium
73%
0.0 In
Fri 31
May		00:00

WSW
WSW

 8 / 18 mph 54 / 51°F 94% 1012 mb
Low level cloud: 39%
Mid level cloud: 10%
High level cloud: 32%
Most Significant Cloud Type: low
46%
0.1 In
06:00

SSW
SSW

 9 / 19 mph 58 / 56°F 95% 1005 mb
Low level cloud: 62%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
72%
0.1 In
12:00

SW
SW

 10 / 22 mph 62 / 62°F 66% 1014 mb
Low level cloud: 73%
Mid level cloud: 49%
High level cloud: 32%
Most Significant Cloud Type: low
93%
0.0 In
18:00

SSW
SSW

 10 / 20 mph 64 / 64°F 70% 1005 mb
Low level cloud: 2%
Mid level cloud: 9%
High level cloud: 22%
Most Significant Cloud Type: medium
14%
0.0 In
Sat 01
Jun		00:00

SSE
SSE

 4 / 9 mph 58 / 58°F 84% 1014 mb
Low level cloud: 0%
Mid level cloud: 58%
High level cloud: 100%
Most Significant Cloud Type: medium
62%
0.0 In
06:00

SSW
SSW

 6 / 12 mph 58 / 57°F 87% 1005 mb
Low level cloud: 24%
Mid level cloud: 12%
High level cloud: 100%
Most Significant Cloud Type: low
40%
0.0 In
12:00

SSE
SSE

 12 / 25 mph 69 / 69°F 64% 1010 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 100%
Most Significant Cloud Type: medium
23%
0.0 In
18:00

SSW
SSW

 11 / 23 mph 63 / 64°F 67% 1008 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
Sun 02
Jun		00:00

SW
SW

 16 / 33 mph 59 / 56°F 90% 1007 mb
Low level cloud: 87%
Mid level cloud: 8%
High level cloud: 49%
Most Significant Cloud Type: low
95%
0.0 In
06:00

S
S

 6 / 12 mph 58 / 58°F 87% 1010 mb
Low level cloud: 25%
Mid level cloud: 18%
High level cloud: 100%
Most Significant Cloud Type: low
43%
0.0 In
12:00

SW
SW

 13 / 28 mph 65 / 65°F 57% 1015 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 40%
Most Significant Cloud Type: high
39%
0.0 In
18:00

SW
SW

 11 / 23 mph 62 / 62°F 86% 1011 mb
Low level cloud: 13%
Mid level cloud: 13%
High level cloud: 48%
Most Significant Cloud Type: low
23%
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