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Isernia 14 Day Long Range Forecast

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

Italy

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

The forecast for Isernia in the coming two weeks is predicting the average daytime maximum temperature will be around 16°C, with a high for the two weeks of 17°C expected on the afternoon of Wednesday 4th. The average minimum temperature will be 4°C, dipping to its lowest on the morning of Sunday 22nd at 2°C. Expect the coming 14 days to have mixed weather with some days dry and some seeing a little rain. It looks like Saturday 28th will have the most precipitation with an accumulation of around 1.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 22
Feb		19:00

W
W

 3 / 6 mph 42 / 41°F 77% 1026 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 12%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 4 / 7 mph 39 / 37°F 78% 1026 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 1%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 23
Feb		01:00

WSW
WSW

 3 / 6 mph 38 / 36°F 79% 1025 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 18%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

 4 / 9 mph 37 / 34°F 78% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 13%
Most Significant Cloud Type: high
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 4 / 9 mph 36 / 32°F 83% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

 7 / 8 mph 53 / 50°F 78% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 49%
Most Significant Cloud Type: high
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 7 / 8 mph 56 / 53°F 78% 1021 mb
Low level cloud: 11%
Mid level cloud: 0%
High level cloud: 90%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 6 / 7 mph 54 / 52°F 84% 1020 mb
Low level cloud: 77%
Mid level cloud: 2%
High level cloud: 4%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 3 / 6 mph 44 / 42°F 93% 1021 mb
Low level cloud: 56%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 4 / 8 mph 43 / 41°F 86% 1021 mb
Low level cloud: 28%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 24
Feb		01:00

WSW
WSW

 4 / 8 mph 42 / 39°F 87% 1020 mb
Low level cloud: 28%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

 3 / 7 mph 41 / 39°F 87% 1019 mb
Low level cloud: 32%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

W
W

 2 / 4 mph 39 / 38°F 90% 1019 mb
Low level cloud: 7%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 4 / 4 mph 55 / 54°F 78% 1019 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 4 / 5 mph 59 / 58°F 71% 1017 mb
Low level cloud: 41%
Mid level cloud: 0%
High level cloud: 17%
Most Significant Cloud Type: low
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 4 / 4 mph 59 / 58°F 76% 1017 mb
Low level cloud: 21%
Mid level cloud: 9%
High level cloud: 17%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ENE
ENE

 2 / 4 mph 46 / 47°F 93% 1019 mb
Low level cloud: 39%
Mid level cloud: 35%
High level cloud: 2%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 4 / 5 mph 49 / 47°F 92% 1020 mb
Low level cloud: 41%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 25
Feb		01:00

NE
NE

 4 / 6 mph 45 / 43°F 91% 1021 mb
Low level cloud: 16%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

 5 / 10 mph 39 / 36°F 88% 1021 mb
Low level cloud: 3%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNE
NNE

 4 / 9 mph 39 / 35°F 84% 1022 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 2%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ENE
ENE

 4 / 5 mph 57 / 55°F 69% 1021 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SE
SE

 2 / 2 mph 62 / 60°F 63% 1021 mb
Low level cloud: 20%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 2 / 3 mph 57 / 58°F 74% 1020 mb
Low level cloud: 16%
Mid level cloud: 51%
High level cloud: 0%
Most Significant Cloud Type: medium
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

 1 / 1 mph 49 / 49°F 84% 1022 mb
Low level cloud: 15%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 3 / 6 mph 43 / 41°F 90% 1023 mb
Low level cloud: 24%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 26
Feb		01:00

NE
NE

 3 / 6 mph 41 / 40°F 90% 1024 mb
Low level cloud: 40%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

 4 / 8 mph 40 / 37°F 91% 1024 mb
Low level cloud: 46%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 5 / 10 mph 39 / 35°F 92% 1025 mb
Low level cloud: 42%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ENE
ENE

 3 / 4 mph 57 / 57°F 74% 1024 mb
Low level cloud: 35%
Mid level cloud: 8%
High level cloud: 1%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

E
E

 2 / 2 mph 61 / 60°F 67% 1023 mb
Low level cloud: 50%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ENE
ENE

 3 / 3 mph 58 / 57°F 78% 1023 mb
Low level cloud: 51%
Mid level cloud: 66%
High level cloud: 2%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ENE
ENE

 4 / 4 mph 51 / 50°F 86% 1025 mb
Low level cloud: 25%
Mid level cloud: 42%
High level cloud: 0%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

 3 / 6 mph 44 / 43°F 90% 1026 mb
Low level cloud: 13%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 27
Feb		01:00

ENE
ENE

 2 / 4 mph 42 / 42°F 88% 1026 mb
Low level cloud: 28%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

 1 / 2 mph 42 / 42°F 86% 1025 mb
Low level cloud: 30%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ESE
ESE

 0 / 1 mph 42 / 42°F 85% 1025 mb
Low level cloud: 23%
Mid level cloud: 29%
High level cloud: 2%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

 4 / 4 mph 56 / 55°F 78% 1025 mb
Low level cloud: 32%
Mid level cloud: 34%
High level cloud: 4%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 4 / 5 mph 58 / 57°F 73% 1023 mb
Low level cloud: 21%
Mid level cloud: 43%
High level cloud: 8%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 3 / 3 mph 57 / 57°F 83% 1023 mb
Low level cloud: 28%
Mid level cloud: 46%
High level cloud: 2%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

 0 / 0 mph 50 / 50°F 93% 1023 mb
Low level cloud: 26%
Mid level cloud: 43%
High level cloud: 3%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

 1 / 1 mph 48 / 48°F 90% 1023 mb
Low level cloud: 11%
Mid level cloud: 43%
High level cloud: 88%
Most Significant Cloud Type: medium
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 28
Feb		01:00

SE
SE

 1 / 1 mph 48 / 48°F 88% 1023 mb
Low level cloud: 4%
Mid level cloud: 45%
High level cloud: 99%
Most Significant Cloud Type: medium
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

 2 / 3 mph 47 / 47°F 87% 1023 mb
Low level cloud: 1%
Mid level cloud: 43%
High level cloud: 57%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ENE
ENE

 2 / 3 mph 47 / 47°F 86% 1023 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 57%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

 2 / 3 mph 56 / 55°F 77% 1023 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 89%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ESE
ESE

 3 / 4 mph 60 / 60°F 65% 1022 mb
Low level cloud: 7%
Mid level cloud: 45%
High level cloud: 94%
Most Significant Cloud Type: medium
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ESE
ESE

 2 / 3 mph 59 / 59°F 72% 1022 mb
Low level cloud: 29%
Mid level cloud: 46%
High level cloud: 42%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ENE
ENE

 4 / 6 mph 47 / 46°F 86% 1023 mb
Low level cloud: 39%
Mid level cloud: 32%
High level cloud: 34%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

 4 / 8 mph 44 / 42°F 90% 1024 mb
Low level cloud: 10%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 01
Mar		01:00

WSW
WSW

 2 / 3 mph 49 / 49°F 93% 1024 mb
Low level cloud: 25%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
32%
0.0 In
07:00

NE
NE

 5 / 11 mph 32 / 27°F 76% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

SSE
SSE

 3 / 3 mph 65 / 65°F 60% 1023 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
0.0 In
19:00

SSW
SSW

 3 / 3 mph 54 / 55°F 92% 1025 mb
Low level cloud: 18%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
18%
0.0 In
Mon 02
Mar		01:00

WSW
WSW

 2 / 3 mph 43 / 43°F 95% 1025 mb
Low level cloud: 37%
Mid level cloud: 4%
High level cloud: 5%
Most Significant Cloud Type: low
38%
0.0 In
07:00

NNE
NNE

 2 / 4 mph 44 / 44°F 87% 1025 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 12%
Most Significant Cloud Type: medium
15%
0.0 In
13:00

SE
SE

 3 / 3 mph 64 / 64°F 56% 1023 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 35%
Most Significant Cloud Type: medium
10%
0.0 In
19:00

NE
NE

 6 / 9 mph 52 / 50°F 93% 1022 mb
Low level cloud: 25%
Mid level cloud: 22%
High level cloud: 4%
Most Significant Cloud Type: low
32%
0.0 In
Tue 03
Mar		01:00

NE
NE

 4 / 9 mph 39 / 36°F 87% 1031 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 3%
Most Significant Cloud Type: medium
7%
0.0 In
07:00

NE
NE

 5 / 9 mph 43 / 40°F 93% 1023 mb
Low level cloud: 25%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: low
47%
0.0 In
13:00

ESE
ESE

 2 / 3 mph 63 / 63°F 47% 1029 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 11%
Most Significant Cloud Type: medium
6%
0.0 In
19:00

NE
NE

 5 / 9 mph 45 / 42°F 89% 1025 mb
Low level cloud: 9%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: medium
70%
0.0 In
Wed 04
Mar		01:00

NNE
NNE

 3 / 7 mph 42 / 40°F 84% 1031 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 1%
Most Significant Cloud Type: medium
5%
0.0 In
07:00

NE
NE

 6 / 10 mph 43 / 39°F 92% 1027 mb
Low level cloud: 22%
Mid level cloud: 46%
High level cloud: 61%
Most Significant Cloud Type: low
45%
0.0 In
13:00

E
E

 4 / 6 mph 63 / 63°F 56% 1027 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 2%
Most Significant Cloud Type: medium
18%
0.0 In
19:00

ENE
ENE

 5 / 9 mph 47 / 45°F 87% 1028 mb
Low level cloud: 16%
Mid level cloud: 22%
High level cloud: 32%
Most Significant Cloud Type: low
27%
0.0 In
Thu 05
Mar		01:00

NE
NE

 4 / 9 mph 40 / 37°F 90% 1028 mb
Low level cloud: 7%
Mid level cloud: 25%
High level cloud: 98%
Most Significant Cloud Type: medium
49%
0.0 In
07:00

NE
NE

 5 / 10 mph 43 / 40°F 86% 1030 mb
Low level cloud: 19%
Mid level cloud: 8%
High level cloud: 100%
Most Significant Cloud Type: low
33%
0.0 In
13:00

E
E

 0 / 0 mph 61 / 61°F 59% 1025 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: medium
47%
0.0 In
19:00

NE
NE

 6 / 13 mph 44 / 40°F 91% 1030 mb
Low level cloud: 16%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: low
28%
0.0 In
Fri 06
Mar		01:00

NE
NE

 4 / 7 mph 45 / 43°F 90% 1026 mb
Low level cloud: 12%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
07:00

NE
NE

 6 / 13 mph 39 / 34°F 77% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
5%
0.0 In
13:00

NNE
NNE

 5 / 8 mph 48 / 46°F 91% 1027 mb
Low level cloud: 83%
Mid level cloud: 88%
High level cloud: 96%
Most Significant Cloud Type: low
100%
0.2 In
19:00

NE
NE

 6 / 13 mph 44 / 40°F 83% 1026 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
Sat 07
Mar		01:00

NE
NE

 5 / 9 mph 45 / 42°F 94% 1026 mb
Low level cloud: 49%
Mid level cloud: 49%
High level cloud: 92%
Most Significant Cloud Type: low
76%
0.1 In
07:00

NE
NE

 5 / 11 mph 44 / 41°F 60% 1023 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 12%
Most Significant Cloud Type: medium
44%
0.0 In
13:00

NE
NE

 6 / 11 mph 53 / 51°F 79% 1022 mb
Low level cloud: 48%
Mid level cloud: 44%
High level cloud: 8%
Most Significant Cloud Type: low
64%
0.0 In
19:00

NE
NE

 6 / 12 mph 47 / 44°F 87% 1019 mb
Low level cloud: 1%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
Sun 08
Mar		01:00

NNE
NNE

 7 / 15 mph 37 / 31°F 92% 1023 mb
Low level cloud: 19%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
27%
0.0 In
07:00

NE
NE

 7 / 15 mph 41 / 36°F 93% 1018 mb
Low level cloud: 30%
Mid level cloud: 2%
High level cloud: 9%
Most Significant Cloud Type: low
31%
0.0 In
13:00

NE
NE

 7 / 12 mph 58 / 57°F 61% 1020 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 36%
Most Significant Cloud Type: medium
23%
0.0 In
19:00

NE
NE

 7 / 12 mph 51 / 48°F 89% 1017 mb
Low level cloud: 19%
Mid level cloud: 44%
High level cloud: 30%
Most Significant Cloud Type: low
38%
0.0 In
Mon 09
Mar		01:00

NNE
NNE

 5 / 11 mph 37 / 32°F 82% 1021 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 1%
Most Significant Cloud Type: medium
2%
0.0 In
07:00

NE
NE

 5 / 9 mph 46 / 43°F 89% 1017 mb
Low level cloud: 10%
Mid level cloud: 33%
High level cloud: 84%
Most Significant Cloud Type: medium
62%
0.0 In
13:00

ENE
ENE

 5 / 9 mph 61 / 61°F 51% 1018 mb
Low level cloud: 0%
Mid level cloud: 39%
High level cloud: 11%
Most Significant Cloud Type: medium
39%
0.0 In
19:00

NE
NE

 7 / 14 mph 48 / 44°F 93% 1018 mb
Low level cloud: 23%
Mid level cloud: 29%
High level cloud: 12%
Most Significant Cloud Type: low
34%
0.2 In

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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