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Hellaby 14 Day Long Range Forecast

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

Rotherham, United Kingdom

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

The forecast for Hellaby in the coming two weeks is predicting the average daytime maximum temperature will be around 25°C, with a high for the two weeks of 29°C expected on the afternoon of Wednesday 13th. The average minimum temperature will be 16°C, dipping to its lowest on the morning of Wednesday 6th at 13°C. The next 14 days will have mostly dry days although Monday is likely to see a little rain. The indicators are that Monday 4th will have the most precipitation with an accumulation of around 4.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Mon 04
Aug		15:00

W
W

 20 / 23 mph 70 / 69°F 45% 1010 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

 18 / 21 mph 66 / 65°F 50% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 16 / 24 mph 60 / 60°F 55% 1013 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
Tue 05
Aug		00:00

W
W

 14 / 20 mph 58 / 55°F 64% 1014 mb
Low level cloud: 5%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

 15 / 20 mph 57 / 54°F 67% 1015 mb
Low level cloud: 93%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

 14 / 19 mph 57 / 54°F 64% 1017 mb
Low level cloud: 83%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

 17 / 19 mph 60 / 60°F 59% 1019 mb
Low level cloud: 90%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WNW
WNW

 19 / 22 mph 66 / 66°F 47% 1020 mb
Low level cloud: 85%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

 19 / 21 mph 68 / 67°F 46% 1021 mb
Low level cloud: 66%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 14 / 16 mph 67 / 65°F 51% 1023 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 9 / 11 mph 61 / 61°F 67% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: high
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 06
Aug		00:00

W
W

 7 / 9 mph 59 / 58°F 76% 1024 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

 9 / 15 mph 56 / 54°F 81% 1024 mb
Low level cloud: 0%
Mid level cloud: 5%
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

WSW
WSW

 8 / 11 mph 59 / 56°F 77% 1023 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

 10 / 11 mph 68 / 66°F 50% 1023 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 8 / 9 mph 74 / 75°F 37% 1022 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 38%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

 8 / 9 mph 76 / 75°F 33% 1019 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 100%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

 10 / 12 mph 73 / 75°F 42% 1018 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 33%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 2 / 3 mph 67 / 67°F 57% 1017 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 7%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 07
Aug		00:00

SW
SW

 9 / 15 mph 62 / 62°F 59% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 18%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 13 / 20 mph 61 / 61°F 54% 1013 mb
Low level cloud: 0%
Mid level cloud: 69%
High level cloud: 0%
Most Significant Cloud Type: medium
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 13 / 16 mph 61 / 60°F 71% 1012 mb
Low level cloud: 14%
Mid level cloud: 1%
High level cloud: 20%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 16 / 19 mph 70 / 68°F 60% 1012 mb
Low level cloud: 69%
Mid level cloud: 2%
High level cloud: 4%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

 15 / 17 mph 73 / 76°F 50% 1012 mb
Low level cloud: 63%
Mid level cloud: 4%
High level cloud: 13%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 15 / 17 mph 76 / 76°F 35% 1012 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 22%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 12 / 14 mph 72 / 76°F 45% 1013 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 7 / 8 mph 66 / 66°F 63% 1015 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 08
Aug		00:00

WSW
WSW

 6 / 9 mph 63 / 63°F 66% 1016 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
03:00

SW
SW

 5 / 7 mph 62 / 62°F 70% 1016 mb
Low level cloud: 1%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

 4 / 5 mph 63 / 61°F 71% 1017 mb
Low level cloud: 2%
Mid level cloud: 1%
High level cloud: 100%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 6 / 7 mph 72 / 69°F 53% 1017 mb
Low level cloud: 28%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 8 / 9 mph 78 / 77°F 38% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 70%
Most Significant Cloud Type: high
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

 8 / 9 mph 81 / 78°F 31% 1015 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 37%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

 7 / 9 mph 81 / 78°F 31% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 99%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NW
NW

 6 / 9 mph 68 / 68°F 59% 1016 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 47%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 09
Aug		00:00

NW
NW

 4 / 5 mph 66 / 66°F 62% 1016 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 86%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

 5 / 6 mph 64 / 64°F 60% 1016 mb
Low level cloud: 0%
Mid level cloud: 53%
High level cloud: 100%
Most Significant Cloud Type: medium
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

 5 / 7 mph 66 / 63°F 64% 1016 mb
Low level cloud: 0%
Mid level cloud: 49%
High level cloud: 100%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 4 / 5 mph 68 / 66°F 59% 1016 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

 8 / 9 mph 78 / 76°F 35% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 9 / 10 mph 81 / 78°F 31% 1015 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 3%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

 9 / 11 mph 78 / 77°F 38% 1015 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 13%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NW
NW

 6 / 7 mph 69 / 69°F 59% 1017 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 10
Aug		00:00

W
W

 1 / 2 mph 65 / 65°F 64% 1018 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

 2 / 3 mph 62 / 62°F 68% 1017 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 18%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 2 / 3 mph 63 / 61°F 62% 1017 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 10%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

 5 / 5 mph 73 / 76°F 49% 1017 mb
Low level cloud: 11%
Mid level cloud: 6%
High level cloud: 20%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

 12 / 14 mph 76 / 76°F 44% 1017 mb
Low level cloud: 46%
Mid level cloud: 53%
High level cloud: 0%
Most Significant Cloud Type: low
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 12 / 14 mph 77 / 77°F 39% 1017 mb
Low level cloud: 2%
Mid level cloud: 25%
High level cloud: 5%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 14 / 16 mph 72 / 70°F 43% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

 7 / 9 mph 66 / 65°F 60% 1020 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 5%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Mon 11
Aug		00:00

W
W

 5 / 8 mph 72 / 72°F 64% 1020 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 2%
Most Significant Cloud Type: medium
8%
0.0 In
06:00

SE
SE

 2 / 3 mph 69 / 69°F 75% 1025 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 78%
Most Significant Cloud Type: medium
11%
0.0 In
12:00

WNW
WNW

 5 / 7 mph 82 / 82°F 37% 1016 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
18:00

WNW
WNW

 13 / 18 mph 71 / 71°F 44% 1022 mb
Low level cloud: 11%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
10%
0.0 In
Tue 12
Aug		00:00

SSE
SSE

 3 / 5 mph 65 / 65°F 64% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: high
10%
0.0 In
06:00

E
E

 4 / 5 mph 61 / 61°F 86% 1025 mb
Low level cloud: 22%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: low
22%
0.0 In
12:00

SSW
SSW

 9 / 11 mph 81 / 80°F 37% 1017 mb
Low level cloud: 0%
Mid level cloud: 35%
High level cloud: 0%
Most Significant Cloud Type: medium
34%
0.0 In
18:00

WNW
WNW

 9 / 11 mph 82 / 82°F 38% 1017 mb
Low level cloud: 0%
Mid level cloud: 49%
High level cloud: 15%
Most Significant Cloud Type: medium
49%
0.0 In
Wed 13
Aug		00:00

NW
NW

 2 / 2 mph 74 / 77°F 60% 1018 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 8%
Most Significant Cloud Type: medium
6%
0.0 In
06:00

WNW
WNW

 6 / 7 mph 67 / 67°F 70% 1019 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: medium
47%
0.0 In
12:00

SSW
SSW

 8 / 11 mph 83 / 81°F 29% 1017 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
18:00

NW
NW

 9 / 11 mph 79 / 80°F 43% 1019 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
0.0 In
Thu 14
Aug		00:00

NW
NW

 3 / 4 mph 76 / 78°F 68% 1013 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
06:00

W
W

 5 / 6 mph 70 / 70°F 68% 1019 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 13%
Most Significant Cloud Type: medium
23%
0.0 In
12:00

WNW
WNW

 10 / 12 mph 79 / 78°F 30% 1013 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 96%
Most Significant Cloud Type: medium
11%
0.0 In
18:00

WNW
WNW

 13 / 17 mph 70 / 70°F 55% 1022 mb
Low level cloud: 7%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
9%
0.0 In
Fri 15
Aug		00:00

N
N

 7 / 9 mph 64 / 64°F 60% 1019 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: medium
6%
0.0 In
06:00

NNW
NNW

 3 / 4 mph 64 / 64°F 55% 1026 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.0 In
12:00

ENE
ENE

 10 / 13 mph 75 / 76°F 38% 1021 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 12%
Most Significant Cloud Type: medium
11%
0.0 In
18:00

WNW
WNW

 10 / 12 mph 76 / 77°F 41% 1024 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
0.0 In
Sat 16
Aug		00:00

ENE
ENE

 4 / 5 mph 65 / 65°F 76% 1024 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
06:00

W
W

 4 / 5 mph 68 / 68°F 69% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

SSE
SSE

 1 / 2 mph 82 / 81°F 34% 1024 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 11%
Most Significant Cloud Type: medium
19%
0.0 In
18:00

WNW
WNW

 11 / 13 mph 79 / 78°F 33% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sun 17
Aug		00:00

S
S

 2 / 3 mph 74 / 77°F 50% 1024 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 21%
Most Significant Cloud Type: medium
12%
0.0 In
06:00

W
W

 2 / 3 mph 71 / 71°F 66% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

ENE
ENE

 5 / 6 mph 84 / 82°F 32% 1024 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.0 In
18:00

NW
NW

 7 / 9 mph 89 / 87°F 29% 1020 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
Mon 18
Aug		00:00

ESE
ESE

 4 / 5 mph 72 / 76°F 57% 1024 mb
Low level cloud: 3%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
4%
0.0 In
06:00

NW
NW

 1 / 1 mph 75 / 78°F 54% 1018 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
12:00

ENE
ENE

 5 / 7 mph 84 / 84°F 41% 1022 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 2%
Most Significant Cloud Type: medium
8%
0.0 In
18:00

WNW
WNW

 13 / 16 mph 83 / 82°F 37% 1014 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 5%
Most Significant Cloud Type: medium
4%
0.0 In
Tue 19
Aug		00:00

SE
SE

 4 / 5 mph 70 / 70°F 84% 1022 mb
Low level cloud: 7%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
12%
0.0 In
06:00

WNW
WNW

 10 / 12 mph 65 / 65°F 65% 1015 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 4%
Most Significant Cloud Type: medium
8%
0.0 In
12:00

E
E

 2 / 3 mph 86 / 87°F 42% 1020 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
18:00

NNW
NNW

 5 / 6 mph 78 / 78°F 40% 1016 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 33%
Most Significant Cloud Type: medium
3%
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