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Bollate 14 Day Long Range Forecast

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

Italy

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

Over the next 14 days the Bollate forecast suggests the average daytime maximum temperature will be around 15°C, with a high for the two weeks of 19°C expected on the afternoon of Thursday 19th. The average minimum temperature will be 9°C, dipping to its lowest on the morning of Sunday 15th at 5°C. The next 14 days will have mixed overhead conditions with some days dry and some seeing a significant amount of rain. Current predictions suggest Saturday 14th will have the most precipitation with an accumulation of around 59.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Tue 10
Mar
16:00

WSW
WSW

3 / 3 mph 58 / 58°F 58% 1022 mb
Low level cloud: 48%
Mid level cloud: 90%
High level cloud: 100%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SW
SW

1 / 1 mph 57 / 57°F 73% 1023 mb
Low level cloud: 82%
Mid level cloud: 94%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

2 / 2 mph 55 / 55°F 74% 1024 mb
Low level cloud: 83%
Mid level cloud: 61%
High level cloud: 53%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 11
Mar
01:00

SW
SW

2 / 2 mph 53 / 54°F 77% 1024 mb
Low level cloud: 88%
Mid level cloud: 54%
High level cloud: 57%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

2 / 3 mph 53 / 53°F 81% 1023 mb
Low level cloud: 40%
Mid level cloud: 45%
High level cloud: 6%
Most Significant Cloud Type: low
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

2 / 2 mph 53 / 51°F 82% 1023 mb
Low level cloud: 37%
Mid level cloud: 45%
High level cloud: 18%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

2 / 3 mph 56 / 56°F 76% 1024 mb
Low level cloud: 31%
Mid level cloud: 46%
High level cloud: 13%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

2 / 2 mph 59 / 59°F 66% 1022 mb
Low level cloud: 6%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: medium
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

2 / 2 mph 59 / 59°F 56% 1020 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 100%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

2 / 2 mph 58 / 59°F 64% 1020 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 92%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

2 / 2 mph 55 / 55°F 70% 1021 mb
Low level cloud: 31%
Mid level cloud: 99%
High level cloud: 77%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 12
Mar
01:00

E
E

2 / 2 mph 54 / 54°F 73% 1021 mb
Low level cloud: 33%
Mid level cloud: 100%
High level cloud: 86%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

3 / 4 mph 53 / 53°F 73% 1020 mb
Low level cloud: 80%
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
07:00

NNE
NNE

3 / 4 mph 52 / 51°F 76% 1021 mb
Low level cloud: 91%
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
10:00

E
E

1 / 1 mph 56 / 55°F 70% 1022 mb
Low level cloud: 59%
Mid level cloud: 48%
High level cloud: 36%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSE
SSE

3 / 4 mph 60 / 59°F 59% 1022 mb
Low level cloud: 29%
Mid level cloud: 41%
High level cloud: 100%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

2 / 3 mph 61 / 59°F 54% 1021 mb
Low level cloud: 7%
Mid level cloud: 17%
High level cloud: 97%
Most Significant Cloud Type: medium
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SW
SW

4 / 4 mph 59 / 59°F 66% 1021 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 11%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

2 / 3 mph 57 / 58°F 77% 1022 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 13
Mar
01:00

WSW
WSW

1 / 1 mph 53 / 53°F 81% 1022 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

1 / 1 mph 50 / 50°F 83% 1021 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

W
W

0 / 1 mph 49 / 48°F 85% 1020 mb
Low level cloud: 8%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

2 / 2 mph 56 / 56°F 68% 1020 mb
Low level cloud: 13%
Mid level cloud: 18%
High level cloud: 65%
Most Significant Cloud Type: low
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

4 / 4 mph 61 / 60°F 55% 1017 mb
Low level cloud: 24%
Mid level cloud: 13%
High level cloud: 1%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

4 / 5 mph 62 / 61°F 49% 1014 mb
Low level cloud: 21%
Mid level cloud: 21%
High level cloud: 7%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

4 / 5 mph 58 / 58°F 65% 1013 mb
Low level cloud: 4%
Mid level cloud: 21%
High level cloud: 45%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

4 / 5 mph 55 / 55°F 73% 1011 mb
Low level cloud: 3%
Mid level cloud: 29%
High level cloud: 100%
Most Significant Cloud Type: medium
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 14
Mar
01:00

ESE
ESE

1 / 2 mph 53 / 53°F 77% 1009 mb
Low level cloud: 66%
Mid level cloud: 90%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

E
E

6 / 8 mph 52 / 50°F 85% 1007 mb
Low level cloud: 73%
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
07:00

ESE
ESE

9 / 12 mph 50 / 47°F 85% 1004 mb
Low level cloud: 21%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

6 / 8 mph 50 / 47°F 92% 1004 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
13:00

NE
NE

9 / 11 mph 49 / 45°F 93% 1001 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.5 In of precipitation over the past 3 hours.
0.5 In
16:00

NE
NE

10 / 12 mph 47 / 42°F 92% 1000 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.7 In of precipitation over the past 3 hours.
0.7 In
19:00

N
N

12 / 14 mph 44 / 38°F 89% 1001 mb
Low level cloud: 98%
Mid level cloud: 94%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
22:00

NNE
NNE

12 / 15 mph 43 / 37°F 90% 1001 mb
Low level cloud: 97%
Mid level cloud: 81%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
Sun 15
Mar
01:00

N
N

12 / 14 mph 42 / 36°F 88% 1002 mb
Low level cloud: 99%
Mid level cloud: 96%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
04:00

N
N

13 / 15 mph 41 / 34°F 91% 1003 mb
Low level cloud: 99%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
07:00

N
N

10 / 15 mph 41 / 34°F 87% 1005 mb
Low level cloud: 96%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
10:00

N
N

10 / 12 mph 43 / 38°F 86% 1009 mb
Low level cloud: 97%
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
13:00

N
N

8 / 10 mph 46 / 42°F 85% 1011 mb
Low level cloud: 97%
Mid level cloud: 78%
High level cloud: 5%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

NNW
NNW

5 / 9 mph 46 / 43°F 83% 1013 mb
Low level cloud: 92%
Mid level cloud: 68%
High level cloud: 10%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NW
NW

4 / 7 mph 46 / 44°F 85% 1014 mb
Low level cloud: 30%
Mid level cloud: 46%
High level cloud: 3%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNW
NNW

4 / 8 mph 44 / 43°F 84% 1016 mb
Low level cloud: 4%
Mid level cloud: 22%
High level cloud: 32%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 16
Mar
01:00

WNW
WNW

3 / 6 mph 43 / 42°F 85% 1016 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NW
NW

4 / 7 mph 43 / 41°F 80% 1016 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNW
NNW

3 / 6 mph 42 / 40°F 75% 1017 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 57%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

N
N

1 / 2 mph 49 / 49°F 61% 1019 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 100%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ENE
ENE

0 / 0 mph 58 / 57°F 51% 1020 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

1 / 1 mph 60 / 59°F 48% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: high
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

2 / 2 mph 59 / 59°F 64% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNW
NNW

3 / 4 mph 52 / 52°F 70% 1021 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
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Tue 17
Mar
01:00

ENE
ENE

4 / 6 mph 58 / 59°F 68% 1018 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 15%
Most Significant Cloud Type: medium
5%
0.0 In
07:00

ENE
ENE

6 / 9 mph 48 / 46°F 66% 1023 mb
Low level cloud: 37%
Mid level cloud: 79%
High level cloud: 7%
Most Significant Cloud Type: low
66%
0.0 In
13:00

SE
SE

4 / 9 mph 67 / 67°F 52% 1013 mb
Low level cloud: 3%
Mid level cloud: 6%
High level cloud: 16%
Most Significant Cloud Type: low
7%
0.0 In
19:00

S
S

3 / 6 mph 71 / 71°F 54% 1010 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 5%
Most Significant Cloud Type: medium
2%
0.0 In
Wed 18
Mar
01:00

ENE
ENE

4 / 6 mph 56 / 56°F 78% 1016 mb
Low level cloud: 20%
Mid level cloud: 19%
High level cloud: 5%
Most Significant Cloud Type: low
27%
0.0 In
07:00

ENE
ENE

1 / 2 mph 55 / 55°F 84% 1016 mb
Low level cloud: 31%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
33%
0.0 In
13:00

SSE
SSE

2 / 4 mph 70 / 70°F 53% 1017 mb
Low level cloud: 7%
Mid level cloud: 4%
High level cloud: 1%
Most Significant Cloud Type: low
8%
0.0 In
19:00

WSW
WSW

3 / 6 mph 73 / 77°F 61% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Thu 19
Mar
01:00

NNE
NNE

2 / 3 mph 64 / 64°F 76% 1017 mb
Low level cloud: 4%
Mid level cloud: 3%
High level cloud: 4%
Most Significant Cloud Type: low
5%
0.0 In
07:00

NW
NW

3 / 6 mph 56 / 56°F 69% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

E
E

3 / 6 mph 62 / 62°F 65% 1018 mb
Low level cloud: 65%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
66%
0.0 In
19:00

SW
SW

4 / 9 mph 69 / 69°F 65% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
1%
0.0 In
Fri 20
Mar
01:00

N
N

2 / 4 mph 64 / 64°F 76% 1019 mb
Low level cloud: 1%
Mid level cloud: 6%
High level cloud: 4%
Most Significant Cloud Type: medium
9%
0.0 In
07:00

W
W

3 / 6 mph 53 / 53°F 74% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 95%
Most Significant Cloud Type: high
95%
0.0 In
13:00

WSW
WSW

4 / 9 mph 71 / 71°F 50% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 10%
Most Significant Cloud Type: high
9%
0.0 In
19:00

SSW
SSW

3 / 6 mph 73 / 77°F 62% 1016 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 33%
Most Significant Cloud Type: medium
2%
0.0 In
Sat 21
Mar
01:00

W
W

2 / 5 mph 65 / 65°F 78% 1019 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
3%
0.0 In
07:00

W
W

2 / 3 mph 59 / 59°F 83% 1018 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
13:00

SSW
SSW

4 / 9 mph 65 / 65°F 62% 1016 mb
Low level cloud: 51%
Mid level cloud: 27%
High level cloud: 32%
Most Significant Cloud Type: low
64%
0.0 In
19:00

SSW
SSW

4 / 9 mph 72 / 76°F 68% 1015 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 95%
Most Significant Cloud Type: medium
12%
0.0 In
Sun 22
Mar
01:00

WSW
WSW

5 / 10 mph 59 / 59°F 82% 1012 mb
Low level cloud: 88%
Mid level cloud: 81%
High level cloud: 6%
Most Significant Cloud Type: low
100%
0.0 In
07:00

WSW
WSW

2 / 4 mph 57 / 59°F 89% 1016 mb
Low level cloud: 28%
Mid level cloud: 13%
High level cloud: 28%
Most Significant Cloud Type: low
35%
0.0 In
13:00

SW
SW

6 / 12 mph 66 / 66°F 58% 1008 mb
Low level cloud: 50%
Mid level cloud: 22%
High level cloud: 100%
Most Significant Cloud Type: low
70%
0.0 In
19:00

WNW
WNW

2 / 3 mph 65 / 65°F 75% 1015 mb
Low level cloud: 65%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
75%
0.0 In
Mon 23
Mar
01:00

WNW
WNW

3 / 7 mph 64 / 64°F 80% 1009 mb
Low level cloud: 1%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.0 In
07:00

ESE
ESE

2 / 5 mph 59 / 60°F 83% 1014 mb
Low level cloud: 68%
Mid level cloud: 100%
High level cloud: 34%
Most Significant Cloud Type: low
100%
0.0 In
13:00

E
E

1 / 3 mph 64 / 64°F 66% 1010 mb
Low level cloud: 19%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
28%
0.0 In
19:00

E
E

4 / 9 mph 61 / 62°F 97% 1009 mb
Low level cloud: 95%
Mid level cloud: 81%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 In
Tue 24
Mar
01:00

WNW
WNW

3 / 6 mph 64 / 64°F 79% 1011 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 4%
Most Significant Cloud Type: medium
4%
0.0 In
07:00

W
W

3 / 6 mph 57 / 57°F 91% 1006 mb
Low level cloud: 12%
Mid level cloud: 46%
High level cloud: 91%
Most Significant Cloud Type: medium
84%
0.5 In
13:00

ESE
ESE

5 / 11 mph 71 / 71°F 50% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
5%
0.0 In
19:00

N
N

10 / 21 mph 61 / 61°F 40% 1008 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
0.0 In
Wed 25
Mar
01:00

E
E

3 / 7 mph 59 / 59°F 84% 1021 mb
Low level cloud: 56%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
58%
0.0 In
07:00

E
E

5 / 11 mph 45 / 42°F 88% 1018 mb
Low level cloud: 61%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: low
70%
0.6 In
13:00

W
W

7 / 15 mph 77 / 76°F 24% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
19:00

ENE
ENE

3 / 7 mph 61 / 61°F 45% 1016 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In

Other Locations Near to Bollate

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