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La Harpe 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for La Harpe

Illinois, United States Of America

Long range weather outlook for La Harpe includes 14 day forecast summary:

For La Harpe in the coming two weeks the average daytime maximum temperature will be around 23°C, with a high for the two weeks of 31°C expected on the afternoon of Wednesday 22nd. The mean minimum temperature will be 15°C, dipping to its lowest on the morning of Wednesday 15th at 9°C. The coming 14 days will have some days seeing a little precipitation and some days with rain. Predictions are Wednesday 22nd will have the most precipitation with an accumulation of around 20.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 14
May		12:00

ENE
ENE

 8 / 11 mph 64 / 64°F 87% 1006 mb
Low level cloud: 82%
Mid level cloud: 45%
High level cloud: 97%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

 14 / 22 mph 65 / 65°F 86% 1006 mb
Low level cloud: 68%
Mid level cloud: 45%
High level cloud: 95%
Most Significant Cloud Type: low
95%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

NE
NE

 11 / 17 mph 64 / 63°F 88% 1007 mb
Low level cloud: 66%
Mid level cloud: 46%
High level cloud: 16%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

 11 / 17 mph 56 / 53°F 94% 1009 mb
Low level cloud: 79%
Mid level cloud: 26%
High level cloud: 9%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 15
May		00:00

NNE
NNE

 9 / 15 mph 52 / 49°F 96% 1009 mb
Low level cloud: 53%
Mid level cloud: 37%
High level cloud: 0%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

 8 / 15 mph 50 / 46°F 95% 1011 mb
Low level cloud: 14%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 6 / 11 mph 53 / 49°F 89% 1011 mb
Low level cloud: 3%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 8 / 10 mph 64 / 61°F 74% 1012 mb
Low level cloud: 23%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 8 / 9 mph 73 / 76°F 67% 1011 mb
Low level cloud: 52%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

 6 / 8 mph 73 / 69°F 72% 1011 mb
Low level cloud: 56%
Mid level cloud: 8%
High level cloud: 1%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

 4 / 6 mph 71 / 69°F 72% 1010 mb
Low level cloud: 69%
Mid level cloud: 11%
High level cloud: 32%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

 4 / 7 mph 65 / 65°F 78% 1011 mb
Low level cloud: 64%
Mid level cloud: 13%
High level cloud: 13%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 16
May		00:00

SSE
SSE

 5 / 9 mph 63 / 63°F 81% 1011 mb
Low level cloud: 72%
Mid level cloud: 13%
High level cloud: 1%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

 6 / 13 mph 60 / 60°F 89% 1011 mb
Low level cloud: 42%
Mid level cloud: 44%
High level cloud: 22%
Most Significant Cloud Type: low
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

 7 / 12 mph 63 / 60°F 90% 1011 mb
Low level cloud: 9%
Mid level cloud: 25%
High level cloud: 99%
Most Significant Cloud Type: medium
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

 9 / 12 mph 66 / 64°F 84% 1011 mb
Low level cloud: 46%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

 11 / 12 mph 66 / 65°F 85% 1010 mb
Low level cloud: 82%
Mid level cloud: 46%
High level cloud: 9%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 10 / 13 mph 65 / 64°F 89% 1009 mb
Low level cloud: 91%
Mid level cloud: 26%
High level cloud: 64%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

 9 / 13 mph 66 / 66°F 89% 1008 mb
Low level cloud: 93%
Mid level cloud: 65%
High level cloud: 97%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

 7 / 13 mph 61 / 62°F 98% 1008 mb
Low level cloud: 83%
Mid level cloud: 15%
High level cloud: 26%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 17
May		00:00

SSE
SSE

 6 / 10 mph 61 / 62°F 98% 1008 mb
Low level cloud: 95%
Mid level cloud: 15%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

SE
SE

 3 / 6 mph 61 / 61°F 99% 1006 mb
Low level cloud: 93%
Mid level cloud: 25%
High level cloud: 3%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

SSE
SSE

 4 / 6 mph 62 / 62°F 97% 1008 mb
Low level cloud: 97%
Mid level cloud: 21%
High level cloud: 14%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 6 / 8 mph 67 / 66°F 88% 1008 mb
Low level cloud: 92%
Mid level cloud: 24%
High level cloud: 88%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

 7 / 10 mph 71 / 71°F 79% 1007 mb
Low level cloud: 83%
Mid level cloud: 30%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

S
S

 8 / 15 mph 72 / 76°F 81% 1005 mb
Low level cloud: 53%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
81%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
18:00

SSE
SSE

 7 / 10 mph 70 / 67°F 89% 1006 mb
Low level cloud: 37%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

 7 / 13 mph 62 / 62°F 97% 1006 mb
Low level cloud: 42%
Mid level cloud: 23%
High level cloud: 18%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May		00:00

E
E

 7 / 13 mph 60 / 60°F 98% 1006 mb
Low level cloud: 58%
Mid level cloud: 8%
High level cloud: 12%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

 8 / 14 mph 59 / 59°F 98% 1006 mb
Low level cloud: 81%
Mid level cloud: 15%
High level cloud: 20%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 7 / 11 mph 62 / 62°F 97% 1006 mb
Low level cloud: 84%
Mid level cloud: 12%
High level cloud: 78%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

 9 / 11 mph 68 / 68°F 86% 1006 mb
Low level cloud: 93%
Mid level cloud: 21%
High level cloud: 7%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

 9 / 12 mph 73 / 77°F 74% 1006 mb
Low level cloud: 87%
Mid level cloud: 22%
High level cloud: 11%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

 6 / 9 mph 77 / 77°F 72% 1006 mb
Low level cloud: 57%
Mid level cloud: 21%
High level cloud: 42%
Most Significant Cloud Type: low
69%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

NE
NE

 4 / 6 mph 76 / 77°F 78% 1007 mb
Low level cloud: 29%
Mid level cloud: 17%
High level cloud: 19%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

 4 / 7 mph 66 / 66°F 89% 1009 mb
Low level cloud: 14%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May		00:00

NNW
NNW

 6 / 13 mph 64 / 64°F 93% 1009 mb
Low level cloud: 1%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

 7 / 13 mph 64 / 64°F 91% 1010 mb
Low level cloud: 5%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

 14 / 20 mph 65 / 63°F 91% 1012 mb
Low level cloud: 68%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

 15 / 19 mph 68 / 67°F 67% 1014 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
12:00

NNW
NNW

 13 / 15 mph 73 / 76°F 52% 1014 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

NNW
NNW

 11 / 15 mph 75 / 76°F 51% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNW
NNW

 6 / 11 mph 68 / 68°F 71% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

 6 / 12 mph 62 / 62°F 73% 1015 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 69%
Most Significant Cloud Type: high
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May		00:00

NE
NE

 5 / 11 mph 59 / 58°F 78% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

 6 / 13 mph 56 / 55°F 85% 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
06:00

E
E

 3 / 6 mph 59 / 58°F 85% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 12%
Most Significant Cloud Type: high
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

 6 / 8 mph 70 / 67°F 68% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 37%
Most Significant Cloud Type: high
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

 6 / 7 mph 76 / 77°F 57% 1015 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 16%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

 6 / 8 mph 79 / 78°F 53% 1013 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 15%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

 7 / 12 mph 75 / 76°F 72% 1012 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

 8 / 17 mph 64 / 64°F 80% 1012 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 21
May		00:00

ESE
ESE

 14 / 30 mph 57 / 54°F 68% 1018 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 6%
Most Significant Cloud Type: medium
5%
0.0 In
06:00

NNW
NNW

 10 / 20 mph 41 / 35°F 80% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: high
32%
0.0 In
18:00

E
E

 20 / 42 mph 67 / 67°F 77% 1007 mb
Low level cloud: 25%
Mid level cloud: 82%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
Wed 22
May		00:00

ENE
ENE

 7 / 15 mph 64 / 64°F 95% 1001 mb
Low level cloud: 4%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
6%
0.0 In
06:00

NNE
NNE

 4 / 7 mph 63 / 63°F 90% 1011 mb
Low level cloud: 3%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
4%
0.0 In
12:00

W
W

 7 / 15 mph 81 / 84°F 58% 1004 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 21%
Most Significant Cloud Type: medium
22%
0.0 In
18:00

E
E

 8 / 16 mph 74 / 78°F 77% 1009 mb
Low level cloud: 15%
Mid level cloud: 44%
High level cloud: 1%
Most Significant Cloud Type: medium
86%
0.0 In
Thu 23
May		00:00

N
N

 12 / 26 mph 62 / 62°F 92% 1004 mb
Low level cloud: 28%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
28%
0.8 In
06:00

E
E

 12 / 26 mph 64 / 64°F 92% 1009 mb
Low level cloud: 47%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
54%
0.2 In
12:00

NNW
NNW

 10 / 20 mph 65 / 65°F 71% 1009 mb
Low level cloud: 88%
Mid level cloud: 3%
High level cloud: 8%
Most Significant Cloud Type: low
89%
0.0 In
18:00

SE
SE

 12 / 25 mph 72 / 76°F 89% 998 mb
Low level cloud: 11%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
13%
0.3 In
Fri 24
May		00:00

NE
NE

 7 / 16 mph 58 / 57°F 83% 1010 mb
Low level cloud: 80%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
82%
0.0 In
06:00

WSW
WSW

 16 / 34 mph 64 / 64°F 93% 999 mb
Low level cloud: 47%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
47%
0.2 In
12:00

NE
NE

 10 / 21 mph 60 / 60°F 70% 1013 mb
Low level cloud: 90%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

WNW
WNW

 12 / 26 mph 67 / 67°F 81% 1002 mb
Low level cloud: 6%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
6%
0.0 In
Sat 25
May		00:00

NNE
NNE

 6 / 14 mph 52 / 50°F 84% 1015 mb
Low level cloud: 36%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
42%
0.0 In
06:00

NE
NE

 4 / 8 mph 56 / 56°F 92% 1005 mb
Low level cloud: 23%
Mid level cloud: 4%
High level cloud: 11%
Most Significant Cloud Type: low
26%
0.0 In
12:00

NNE
NNE

 4 / 8 mph 65 / 65°F 44% 1018 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
0.0 In
18:00

N
N

 10 / 21 mph 67 / 67°F 80% 1003 mb
Low level cloud: 48%
Mid level cloud: 80%
High level cloud: 88%
Most Significant Cloud Type: low
86%
0.0 In
Sun 26
May		00:00

SSW
SSW

 9 / 18 mph 56 / 54°F 78% 1017 mb
Low level cloud: 28%
Mid level cloud: 45%
High level cloud: 3%
Most Significant Cloud Type: low
43%
0.0 In
06:00

WNW
WNW

 11 / 23 mph 56 / 53°F 91% 1008 mb
Low level cloud: 6%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
6%
0.1 In
12:00

WNW
WNW

 2 / 4 mph 68 / 68°F 60% 1019 mb
Low level cloud: 1%
Mid level cloud: 52%
High level cloud: 0%
Most Significant Cloud Type: medium
54%
0.0 In
18:00

WNW
WNW

 8 / 17 mph 69 / 69°F 74% 1011 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
2%
0.0 In
Mon 27
May		00:00

SE
SE

 7 / 16 mph 58 / 57°F 83% 1017 mb
Low level cloud: 12%
Mid level cloud: 42%
High level cloud: 99%
Most Significant Cloud Type: medium
80%
0.0 In
06:00

S
S

 3 / 7 mph 62 / 62°F 85% 1015 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
12:00

SSE
SSE

 16 / 34 mph 70 / 70°F 70% 1014 mb
Low level cloud: 50%
Mid level cloud: 40%
High level cloud: 100%
Most Significant Cloud Type: low
75%
0.0 In
18:00

ESE
ESE

 12 / 25 mph 73 / 77°F 75% 1012 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
Tue 28
May		00:00

SE
SE

 15 / 31 mph 62 / 62°F 95% 1009 mb
Low level cloud: 74%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
06:00

SE
SE

 15 / 31 mph 61 / 62°F 94% 1013 mb
Low level cloud: 78%
Mid level cloud: 96%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.6 In
12:00

S
S

 11 / 22 mph 69 / 69°F 96% 1003 mb
Low level cloud: 100%
Mid level cloud: 68%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.5 In
18:00

ESE
ESE

 11 / 23 mph 67 / 67°F 94% 1012 mb
Low level cloud: 96%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
Wed 29
May		00:00

W
W

 13 / 27 mph 61 / 61°F 90% 1008 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.3 In
06:00

NE
NE

 5 / 11 mph 64 / 64°F 98% 1015 mb
Low level cloud: 100%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
12:00

WNW
WNW

 19 / 41 mph 73 / 77°F 63% 1013 mb
Low level cloud: 19%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.0 In
18:00

N
N

 15 / 31 mph 54 / 49°F 93% 1017 mb
Low level cloud: 99%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In

Other Locations Near to La Harpe

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