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Giresun 14 Day Long Range Forecast

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

Turkey

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

The next 14 day outlook for Giresun shows the average daytime maximum temperature will be around 25°C, with a high for the two weeks of 28°C expected on the afternoon of Monday 9th. The average minimum temperature will be 15°C, dipping to its lowest on the morning of Thursday 5th at 13°C. Expect the coming 14 days to remain predominantly dry. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 04
Jun
17:00

WNW
WNW

3 / 3 mph 74 / 76°F 71% 1019 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
20:00

SSW
SSW

4 / 9 mph 58 / 58°F 78% 1020 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
23:00

S
S

6 / 12 mph 56 / 55°F 71% 1020 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 05
Jun
02:00

SSW
SSW

7 / 14 mph 55 / 53°F 67% 1020 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 1%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

S
S

6 / 12 mph 57 / 55°F 66% 1020 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
08:00

N
N

3 / 4 mph 76 / 76°F 57% 1020 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 7%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

NNE
NNE

5 / 6 mph 79 / 78°F 57% 1020 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 14%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

NE
NE

6 / 6 mph 79 / 79°F 58% 1019 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 1%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

ENE
ENE

4 / 4 mph 76 / 77°F 66% 1019 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

SSE
SSE

4 / 9 mph 59 / 59°F 76% 1019 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
23:00

S
S

4 / 8 mph 58 / 59°F 71% 1019 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 06
Jun
02:00

S
S

4 / 10 mph 57 / 56°F 70% 1018 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
05:00

SSW
SSW

4 / 8 mph 60 / 58°F 71% 1019 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

NNW
NNW

4 / 4 mph 77 / 77°F 64% 1018 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

N
N

5 / 6 mph 79 / 78°F 63% 1018 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
14:00

N
N

4 / 5 mph 79 / 79°F 61% 1018 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

N
N

2 / 2 mph 79 / 78°F 65% 1018 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

SSW
SSW

4 / 9 mph 59 / 59°F 79% 1019 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

SSW
SSW

6 / 12 mph 57 / 56°F 78% 1018 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
Sat 07
Jun
02:00

SW
SW

4 / 8 mph 56 / 56°F 71% 1018 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
05:00

S
S

5 / 10 mph 57 / 56°F 68% 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
08:00

NNE
NNE

4 / 5 mph 76 / 77°F 62% 1018 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
11:00

NNE
NNE

6 / 8 mph 80 / 79°F 63% 1018 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
14:00

NE
NE

7 / 8 mph 80 / 80°F 66% 1017 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
17:00

ENE
ENE

4 / 5 mph 78 / 79°F 73% 1017 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
20:00

SE
SE

3 / 6 mph 61 / 61°F 85% 1017 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
23:00

S
S

4 / 8 mph 58 / 58°F 78% 1017 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
Sun 08
Jun
02:00

SSW
SSW

4 / 8 mph 56 / 56°F 68% 1016 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
05:00

SSW
SSW

4 / 8 mph 58 / 57°F 64% 1016 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
08:00

NNW
NNW

4 / 5 mph 76 / 77°F 66% 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
11:00

N
N

5 / 6 mph 80 / 80°F 69% 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
14:00

NNE
NNE

5 / 6 mph 80 / 80°F 71% 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
17:00

NNE
NNE

3 / 4 mph 80 / 81°F 77% 1014 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
20:00

SSE
SSE

2 / 4 mph 63 / 63°F 88% 1015 mb
Low level cloud: 2%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

S
S

2 / 5 mph 60 / 60°F 86% 1014 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
Mon 09
Jun
02:00

S
S

3 / 6 mph 58 / 59°F 82% 1013 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

S
S

1 / 2 mph 63 / 60°F 78% 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
08:00

NNE
NNE

4 / 4 mph 77 / 78°F 73% 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
11:00

NNE
NNE

6 / 6 mph 81 / 81°F 69% 1012 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
14:00

NE
NE

6 / 6 mph 82 / 83°F 70% 1012 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

NE
NE

2 / 3 mph 82 / 83°F 74% 1011 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

SSE
SSE

3 / 5 mph 65 / 65°F 84% 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
23:00

SSW
SSW

3 / 6 mph 61 / 61°F 82% 1012 mb
Low level cloud: 0%
Mid level cloud: 1%
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 10
Jun
02:00

SSW
SSW

2 / 4 mph 60 / 60°F 81% 1012 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
05:00

SW
SW

3 / 5 mph 65 / 63°F 80% 1013 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
08:00

NW
NW

6 / 7 mph 78 / 78°F 76% 1013 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

NW
NW

6 / 7 mph 79 / 79°F 74% 1014 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

NW
NW

7 / 9 mph 78 / 79°F 73% 1014 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

WNW
WNW

5 / 6 mph 77 / 77°F 80% 1015 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

WSW
WSW

5 / 10 mph 62 / 62°F 89% 1016 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

WSW
WSW

5 / 11 mph 60 / 60°F 87% 1016 mb
Low level cloud: 8%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 11
Jun
02:00

S
S

4 / 8 mph 60 / 60°F 75% 1014 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
08:00

N
N

3 / 7 mph 79 / 82°F 66% 1011 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
14:00

NNE
NNE

3 / 7 mph 77 / 81°F 77% 1014 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
20:00

SSE
SSE

3 / 6 mph 70 / 70°F 81% 1012 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
Thu 12
Jun
02:00

SSW
SSW

4 / 8 mph 60 / 60°F 83% 1017 mb
Low level cloud: 8%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
10%
0.0 In
08:00

NW
NW

5 / 7 mph 64 / 64°F 90% 1017 mb
Low level cloud: 68%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
69%
0.0 In
14:00

NNE
NNE

4 / 7 mph 70 / 70°F 74% 1018 mb
Low level cloud: 33%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
37%
0.0 In
20:00

SSE
SSE

2 / 3 mph 71 / 71°F 89% 1016 mb
Low level cloud: 7%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
8%
0.0 In
Fri 13
Jun
02:00

S
S

3 / 5 mph 60 / 60°F 84% 1019 mb
Low level cloud: 24%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
26%
0.0 In
08:00

NW
NW

6 / 9 mph 76 / 79°F 81% 1016 mb
Low level cloud: 8%
Mid level cloud: 1%
High level cloud: 1%
Most Significant Cloud Type: low
9%
0.0 In
14:00

NNE
NNE

6 / 9 mph 74 / 78°F 72% 1019 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
20:00

WNW
WNW

2 / 3 mph 70 / 70°F 90% 1019 mb
Low level cloud: 85%
Mid level cloud: 2%
High level cloud: 12%
Most Significant Cloud Type: low
87%
0.0 In
Sat 14
Jun
02:00

S
S

2 / 3 mph 62 / 62°F 85% 1017 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
08:00

NW
NW

6 / 9 mph 66 / 66°F 91% 1017 mb
Low level cloud: 82%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: low
83%
0.0 In
14:00

NNE
NNE

6 / 10 mph 78 / 82°F 73% 1015 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
20:00

WNW
WNW

4 / 6 mph 69 / 69°F 87% 1017 mb
Low level cloud: 49%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
49%
0.0 In
Sun 15
Jun
02:00

S
S

2 / 3 mph 64 / 64°F 83% 1013 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
08:00

NW
NW

5 / 8 mph 70 / 70°F 80% 1016 mb
Low level cloud: 19%
Mid level cloud: 3%
High level cloud: 7%
Most Significant Cloud Type: low
20%
0.0 In
14:00

NNW
NNW

4 / 6 mph 75 / 78°F 77% 1013 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
20:00

SW
SW

5 / 10 mph 62 / 62°F 83% 1015 mb
Low level cloud: 21%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
26%
0.0 In
Mon 16
Jun
02:00

S
S

4 / 9 mph 60 / 60°F 81% 1013 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
08:00

WNW
WNW

4 / 7 mph 67 / 67°F 77% 1013 mb
Low level cloud: 89%
Mid level cloud: 70%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
14:00

NNE
NNE

6 / 10 mph 79 / 81°F 66% 1012 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
20:00

W
W

12 / 20 mph 64 / 64°F 93% 1015 mb
Low level cloud: 98%
Mid level cloud: 97%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.1 In
Tue 17
Jun
02:00

SW
SW

3 / 7 mph 62 / 62°F 75% 1014 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
08:00

NW
NW

3 / 6 mph 63 / 63°F 86% 1016 mb
Low level cloud: 79%
Mid level cloud: 64%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
14:00

NNW
NNW

5 / 8 mph 74 / 77°F 75% 1016 mb
Low level cloud: 1%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
20:00

ESE
ESE

2 / 4 mph 67 / 67°F 87% 1018 mb
Low level cloud: 26%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
36%
0.0 In
Wed 18
Jun
02:00

SSW
SSW

4 / 6 mph 63 / 63°F 85% 1017 mb
Low level cloud: 62%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
77%
0.0 In
08:00

NE
NE

5 / 10 mph 74 / 77°F 71% 1016 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
14:00

WNW
WNW

6 / 11 mph 68 / 69°F 84% 1019 mb
Low level cloud: 80%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
96%
0.1 In
20:00

ESE
ESE

4 / 8 mph 66 / 66°F 88% 1014 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
Thu 19
Jun
02:00

W
W

3 / 6 mph 65 / 65°F 84% 1018 mb
Low level cloud: 22%
Mid level cloud: 59%
High level cloud: 0%
Most Significant Cloud Type: low
42%
0.0 In
08:00

NE
NE

5 / 10 mph 80 / 83°F 66% 1011 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
14:00

NE
NE

6 / 11 mph 73 / 77°F 76% 1016 mb
Low level cloud: 14%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
22%
0.0 In
20:00

W
W

5 / 9 mph 64 / 64°F 89% 1012 mb
Low level cloud: 14%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
16%
0.0 In

Other Locations Near to Giresun

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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