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Grosseto 14 Day Long Range Forecast

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

Italy

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

The outlook for Grosseto in the two weeks ahead shows the average daytime maximum temperature will be around 14°C, with a high for the two weeks of 16°C expected on the afternoon of Friday 19th. The mean minimum temperature will be 10°C, dipping to its lowest on the morning of Thursday 25th at 8°C. Expect the coming 14 days to have some days seeing a little precipitation and some days with rain. The current forecast indicates Monday 22nd will have the most precipitation with an accumulation of around 27.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Mon 15
Dec		19:00

E
E

 6 / 9 mph 57 / 55°F 81% 1023 mb
Low level cloud: 42%
Mid level cloud: 100%
High level cloud: 32%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

 8 / 11 mph 55 / 53°F 80% 1022 mb
Low level cloud: 58%
Mid level cloud: 53%
High level cloud: 100%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 16
Dec		01:00

E
E

 11 / 18 mph 54 / 50°F 81% 1020 mb
Low level cloud: 52%
Mid level cloud: 44%
High level cloud: 80%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ESE
ESE

 11 / 20 mph 53 / 49°F 78% 1018 mb
Low level cloud: 20%
Mid level cloud: 53%
High level cloud: 100%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ESE
ESE

 13 / 23 mph 53 / 49°F 71% 1018 mb
Low level cloud: 0%
Mid level cloud: 81%
High level cloud: 22%
Most Significant Cloud Type: medium
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

 9 / 15 mph 55 / 52°F 67% 1018 mb
Low level cloud: 3%
Mid level cloud: 77%
High level cloud: 100%
Most Significant Cloud Type: medium
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

E
E

 16 / 18 mph 57 / 53°F 73% 1016 mb
Low level cloud: 82%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

ESE
ESE

 18 / 21 mph 57 / 53°F 82% 1015 mb
Low level cloud: 83%
Mid level cloud: 95%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

ESE
ESE

 17 / 21 mph 56 / 52°F 83% 1015 mb
Low level cloud: 75%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

E
E

 16 / 22 mph 54 / 50°F 87% 1016 mb
Low level cloud: 98%
Mid level cloud: 82%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Wed 17
Dec		01:00

E
E

 9 / 12 mph 54 / 51°F 90% 1016 mb
Low level cloud: 89%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
04:00

SE
SE

 10 / 16 mph 53 / 50°F 92% 1016 mb
Low level cloud: 99%
Mid level cloud: 96%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

 5 / 11 mph 53 / 51°F 92% 1019 mb
Low level cloud: 55%
Mid level cloud: 62%
High level cloud: 33%
Most Significant Cloud Type: low
80%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

SSE
SSE

 6 / 11 mph 55 / 53°F 86% 1022 mb
Low level cloud: 77%
Mid level cloud: 31%
High level cloud: 17%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSE
SSE

 9 / 17 mph 56 / 54°F 78% 1022 mb
Low level cloud: 72%
Mid level cloud: 25%
High level cloud: 33%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SE
SE

 5 / 9 mph 57 / 56°F 85% 1023 mb
Low level cloud: 7%
Mid level cloud: 13%
High level cloud: 10%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

E
E

 5 / 8 mph 56 / 56°F 88% 1024 mb
Low level cloud: 5%
Mid level cloud: 6%
High level cloud: 13%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

 6 / 10 mph 54 / 53°F 88% 1025 mb
Low level cloud: 7%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: medium
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 18
Dec		01:00

ENE
ENE

 6 / 10 mph 54 / 53°F 88% 1026 mb
Low level cloud: 29%
Mid level cloud: 38%
High level cloud: 33%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

 5 / 10 mph 54 / 53°F 87% 1026 mb
Low level cloud: 69%
Mid level cloud: 7%
High level cloud: 100%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ENE
ENE

 5 / 9 mph 54 / 52°F 88% 1026 mb
Low level cloud: 52%
Mid level cloud: 44%
High level cloud: 33%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ENE
ENE

 5 / 7 mph 57 / 56°F 83% 1027 mb
Low level cloud: 17%
Mid level cloud: 18%
High level cloud: 22%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ESE
ESE

 4 / 6 mph 61 / 60°F 72% 1026 mb
Low level cloud: 1%
Mid level cloud: 15%
High level cloud: 33%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ESE
ESE

 4 / 7 mph 59 / 59°F 78% 1026 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 100%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ENE
ENE

 4 / 7 mph 57 / 57°F 83% 1026 mb
Low level cloud: 0%
Mid level cloud: 47%
High level cloud: 32%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

 3 / 6 mph 57 / 57°F 80% 1026 mb
Low level cloud: 0%
Mid level cloud: 60%
High level cloud: 1%
Most Significant Cloud Type: medium
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 19
Dec		01:00

E
E

 4 / 8 mph 56 / 56°F 78% 1025 mb
Low level cloud: 22%
Mid level cloud: 62%
High level cloud: 8%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

 3 / 6 mph 54 / 55°F 75% 1025 mb
Low level cloud: 80%
Mid level cloud: 80%
High level cloud: 4%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

E
E

 3 / 6 mph 54 / 54°F 73% 1024 mb
Low level cloud: 97%
Mid level cloud: 77%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

 4 / 7 mph 58 / 57°F 70% 1024 mb
Low level cloud: 32%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

 3 / 4 mph 61 / 60°F 62% 1023 mb
Low level cloud: 22%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNE
NNE

 4 / 6 mph 62 / 61°F 70% 1022 mb
Low level cloud: 1%
Mid level cloud: 26%
High level cloud: 100%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNE
NNE

 6 / 7 mph 59 / 59°F 76% 1022 mb
Low level cloud: 2%
Mid level cloud: 29%
High level cloud: 100%
Most Significant Cloud Type: medium
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 4 / 6 mph 57 / 57°F 76% 1021 mb
Low level cloud: 6%
Mid level cloud: 30%
High level cloud: 36%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 20
Dec		01:00

NNE
NNE

 6 / 12 mph 52 / 50°F 78% 1019 mb
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 17%
Most Significant Cloud Type: medium
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

 7 / 14 mph 50 / 48°F 81% 1018 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 11%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 6 / 13 mph 49 / 46°F 83% 1018 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

 5 / 7 mph 53 / 52°F 76% 1018 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ENE
ENE

 2 / 2 mph 61 / 60°F 64% 1017 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNE
NNE

 0 / 0 mph 60 / 59°F 69% 1016 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
19:00

NE
NE

 3 / 6 mph 53 / 53°F 76% 1015 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 1%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

 4 / 8 mph 51 / 50°F 81% 1015 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 14%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 21
Dec		01:00

ENE
ENE

 4 / 8 mph 50 / 49°F 82% 1015 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 68%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

 4 / 9 mph 49 / 47°F 80% 1014 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 9%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ENE
ENE

 6 / 11 mph 48 / 45°F 78% 1014 mb
Low level cloud: 1%
Mid level cloud: 28%
High level cloud: 36%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ENE
ENE

 5 / 7 mph 53 / 51°F 72% 1014 mb
Low level cloud: 46%
Mid level cloud: 73%
High level cloud: 100%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ENE
ENE

 5 / 6 mph 57 / 56°F 67% 1012 mb
Low level cloud: 87%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ENE
ENE

 6 / 9 mph 53 / 51°F 87% 1012 mb
Low level cloud: 63%
Mid level cloud: 95%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ENE
ENE

 7 / 11 mph 53 / 51°F 87% 1012 mb
Low level cloud: 85%
Mid level cloud: 100%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

 7 / 11 mph 54 / 53°F 81% 1012 mb
Low level cloud: 78%
Mid level cloud: 98%
High level cloud: 53%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Mon 22
Dec		01:00

NE
NE

 3 / 4 mph 57 / 57°F 77% 1018 mb
Low level cloud: 19%
Mid level cloud: 31%
High level cloud: 84%
Most Significant Cloud Type: low
39%
0.0 In
07:00

NE
NE

 6 / 11 mph 47 / 44°F 85% 1021 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
13:00

ENE
ENE

 4 / 5 mph 57 / 57°F 74% 1015 mb
Low level cloud: 75%
Mid level cloud: 79%
High level cloud: 34%
Most Significant Cloud Type: low
100%
0.0 In
19:00

ESE
ESE

 6 / 10 mph 58 / 57°F 88% 1013 mb
Low level cloud: 13%
Mid level cloud: 46%
High level cloud: 71%
Most Significant Cloud Type: medium
85%
0.0 In
Tue 23
Dec		01:00

NE
NE

 10 / 19 mph 53 / 50°F 87% 1004 mb
Low level cloud: 45%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
91%
0.0 In
07:00

E
E

 6 / 14 mph 48 / 45°F 85% 1012 mb
Low level cloud: 38%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
45%
0.0 In
13:00

ENE
ENE

 11 / 20 mph 57 / 54°F 69% 1012 mb
Low level cloud: 69%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
19:00

ESE
ESE

 9 / 18 mph 58 / 56°F 83% 1017 mb
Low level cloud: 1%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
Wed 24
Dec		01:00

S
S

 2 / 4 mph 52 / 53°F 81% 1006 mb
Low level cloud: 51%
Mid level cloud: 27%
High level cloud: 33%
Most Significant Cloud Type: low
64%
0.0 In
07:00

NE
NE

 6 / 13 mph 53 / 51°F 84% 1016 mb
Low level cloud: 9%
Mid level cloud: 100%
High level cloud: 98%
Most Significant Cloud Type: medium
100%
0.1 In
13:00

E
E

 8 / 16 mph 51 / 49°F 81% 1009 mb
Low level cloud: 91%
Mid level cloud: 59%
High level cloud: 5%
Most Significant Cloud Type: low
100%
0.7 In
19:00

E
E

 6 / 14 mph 56 / 54°F 91% 1013 mb
Low level cloud: 31%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.8 In
Thu 25
Dec		01:00

E
E

 5 / 11 mph 51 / 49°F 87% 1013 mb
Low level cloud: 16%
Mid level cloud: 22%
High level cloud: 32%
Most Significant Cloud Type: low
27%
0.1 In
07:00

E
E

 6 / 14 mph 52 / 50°F 92% 1011 mb
Low level cloud: 21%
Mid level cloud: 18%
High level cloud: 100%
Most Significant Cloud Type: low
39%
0.4 In
13:00

NE
NE

 7 / 15 mph 53 / 51°F 88% 1015 mb
Low level cloud: 87%
Mid level cloud: 71%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 In
19:00

E
E

 4 / 9 mph 59 / 59°F 79% 1011 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
0.2 In
Fri 26
Dec		01:00

NE
NE

 8 / 17 mph 45 / 41°F 84% 1014 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 12%
Most Significant Cloud Type: medium
44%
0.0 In
07:00

ENE
ENE

 5 / 10 mph 50 / 48°F 82% 1015 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 9%
Most Significant Cloud Type: medium
18%
0.0 In
13:00

NE
NE

 17 / 35 mph 59 / 56°F 71% 1012 mb
Low level cloud: 18%
Mid level cloud: 6%
High level cloud: 9%
Most Significant Cloud Type: low
20%
0.0 In
19:00

NNE
NNE

 6 / 13 mph 51 / 49°F 82% 1015 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: medium
13%
0.0 In
Sat 27
Dec		01:00

NNE
NNE

 13 / 28 mph 46 / 40°F 79% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 20%
Most Significant Cloud Type: medium
5%
0.0 In
07:00

NNE
NNE

 13 / 26 mph 48 / 42°F 81% 1010 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
7%
0.0 In
13:00

NNE
NNE

 12 / 24 mph 54 / 50°F 63% 1016 mb
Low level cloud: 1%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: medium
8%
0.0 In
19:00

N
N

 11 / 22 mph 52 / 48°F 77% 1012 mb
Low level cloud: 0%
Mid level cloud: 93%
High level cloud: 100%
Most Significant Cloud Type: medium
97%
0.0 In
Sun 28
Dec		01:00

NE
NE

 7 / 15 mph 44 / 40°F 84% 1019 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.0 In
07:00

NNE
NNE

 7 / 15 mph 46 / 42°F 84% 1014 mb
Low level cloud: 2%
Mid level cloud: 25%
High level cloud: 19%
Most Significant Cloud Type: medium
30%
0.0 In
13:00

NE
NE

 2 / 5 mph 57 / 58°F 67% 1021 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 36%
Most Significant Cloud Type: medium
5%
0.0 In
19:00

WSW
WSW

 2 / 3 mph 54 / 55°F 75% 1011 mb
Low level cloud: 59%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: low
73%
0.0 In
Mon 29
Dec		01:00

ENE
ENE

 7 / 15 mph 47 / 43°F 81% 1023 mb
Low level cloud: 47%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
74%
0.0 In
07:00

NNE
NNE

 24 / 50 mph 43 / 33°F 88% 1006 mb
Low level cloud: 75%
Mid level cloud: 51%
High level cloud: 0%
Most Significant Cloud Type: low
93%
0.0 In
13:00

E
E

 7 / 14 mph 57 / 55°F 64% 1023 mb
Low level cloud: 16%
Mid level cloud: 13%
High level cloud: 100%
Most Significant Cloud Type: low
32%
0.0 In
19:00

NNE
NNE

 26 / 54 mph 42 / 33°F 56% 1009 mb
Low level cloud: 11%
Mid level cloud: 23%
High level cloud: 6%
Most Significant Cloud Type: low
19%
0.0 In
Tue 30
Dec		01:00

NE
NE

 6 / 13 mph 49 / 47°F 76% 1024 mb
Low level cloud: 0%
Mid level cloud: 88%
High level cloud: 100%
Most Significant Cloud Type: medium
91%
0.0 In
07:00

N
N

 19 / 41 mph 38 / 28°F 53% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

NE
NE

 4 / 9 mph 57 / 57°F 63% 1023 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 79%
Most Significant Cloud Type: medium
100%
0.0 In
19:00

NNE
NNE

 8 / 16 mph 42 / 37°F 59% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In

Other Locations Near to Grosseto

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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