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Ipsos 14 Day Long Range Forecast

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

Greece

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

Reviewing the forecast for Ipsos Over the next 14 days and the average daytime maximum temperature will be around 16°C, with a high for the two weeks of 18°C expected on the afternoon of Tuesday 25th. The mean minimum temperature will be 12°C, dipping to its lowest on the morning of Monday 24th at 11°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. The current forecast indicates Thursday 27th will have the most precipitation with an accumulation of around 62.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 23
Nov		20:00

WNW
WNW

 9 / 11 mph 55 / 53°F 65% 1019 mb
Low level cloud: 2%
Mid level cloud: 3%
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

NW
NW

 7 / 10 mph 55 / 53°F 60% 1021 mb
Low level cloud: 19%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 24
Nov		02:00

NNW
NNW

 4 / 7 mph 53 / 52°F 60% 1021 mb
Low level cloud: 11%
Mid level cloud: 8%
High level cloud: 12%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

NE
NE

 4 / 8 mph 51 / 50°F 63% 1020 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

E
E

 4 / 6 mph 53 / 51°F 66% 1021 mb
Low level cloud: 2%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

ESE
ESE

 4 / 5 mph 57 / 56°F 60% 1021 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
14:00

SSE
SSE

 4 / 5 mph 59 / 59°F 58% 1020 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 4%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

SSE
SSE

 6 / 7 mph 59 / 58°F 66% 1020 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 77%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

SE
SE

 8 / 13 mph 56 / 53°F 70% 1019 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

SE
SE

 11 / 21 mph 54 / 50°F 70% 1018 mb
Low level cloud: 28%
Mid level cloud: 16%
High level cloud: 100%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 25
Nov		02:00

SE
SE

 14 / 20 mph 57 / 53°F 74% 1017 mb
Low level cloud: 88%
Mid level cloud: 73%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

SE
SE

 11 / 18 mph 55 / 52°F 84% 1015 mb
Low level cloud: 92%
Mid level cloud: 74%
High level cloud: 3%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
08:00

SSE
SSE

 11 / 19 mph 57 / 54°F 82% 1015 mb
Low level cloud: 86%
Mid level cloud: 73%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
11:00

SSE
SSE

 14 / 24 mph 61 / 61°F 75% 1014 mb
Low level cloud: 46%
Mid level cloud: 58%
High level cloud: 100%
Most Significant Cloud Type: low
78%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
14:00

S
S

 16 / 29 mph 64 / 63°F 76% 1012 mb
Low level cloud: 35%
Mid level cloud: 46%
High level cloud: 21%
Most Significant Cloud Type: low
54%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
17:00

S
S

 20 / 36 mph 63 / 63°F 75% 1011 mb
Low level cloud: 22%
Mid level cloud: 28%
High level cloud: 21%
Most Significant Cloud Type: low
34%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
20:00

S
S

 21 / 39 mph 60 / 60°F 76% 1011 mb
Low level cloud: 23%
Mid level cloud: 44%
High level cloud: 14%
Most Significant Cloud Type: low
40%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
23:00

S
S

 22 / 46 mph 58 / 54°F 78% 1010 mb
Low level cloud: 9%
Mid level cloud: 14%
High level cloud: 32%
Most Significant Cloud Type: low
17%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Wed 26
Nov		02:00

S
S

 20 / 37 mph 59 / 59°F 78% 1010 mb
Low level cloud: 38%
Mid level cloud: 26%
High level cloud: 33%
Most Significant Cloud Type: low
50%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
05:00

S
S

 15 / 29 mph 58 / 55°F 80% 1009 mb
Low level cloud: 41%
Mid level cloud: 62%
High level cloud: 12%
Most Significant Cloud Type: low
63%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
08:00

SSW
SSW

 12 / 24 mph 60 / 59°F 81% 1009 mb
Low level cloud: 15%
Mid level cloud: 46%
High level cloud: 3%
Most Significant Cloud Type: medium
89%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
11:00

S
S

 8 / 14 mph 62 / 62°F 79% 1010 mb
Low level cloud: 11%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
14:00

SSE
SSE

 12 / 19 mph 63 / 63°F 84% 1009 mb
Low level cloud: 44%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
90%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
17:00

SSE
SSE

 14 / 23 mph 63 / 62°F 87% 1009 mb
Low level cloud: 54%
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
20:00

S
S

 12 / 20 mph 61 / 61°F 84% 1008 mb
Low level cloud: 48%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: low
91%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
23:00

SSE
SSE

 12 / 20 mph 60 / 60°F 84% 1008 mb
Low level cloud: 53%
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
Thu 27
Nov		02:00

SSE
SSE

 11 / 19 mph 57 / 54°F 91% 1005 mb
Low level cloud: 59%
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
05:00

W
W

 7 / 11 mph 56 / 55°F 89% 1005 mb
Low level cloud: 90%
Mid level cloud: 83%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.7 In of precipitation over the past 3 hours.
0.7 In
08:00

SE
SE

 5 / 8 mph 57 / 56°F 89% 1007 mb
Low level cloud: 82%
Mid level cloud: 50%
High level cloud: 13%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
11:00

SSE
SSE

 15 / 24 mph 59 / 59°F 85% 1007 mb
Low level cloud: 68%
Mid level cloud: 87%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
14:00

S
S

 12 / 17 mph 61 / 61°F 84% 1006 mb
Low level cloud: 63%
Mid level cloud: 51%
High level cloud: 100%
Most Significant Cloud Type: low
92%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
17:00

SSE
SSE

 9 / 16 mph 61 / 60°F 82% 1007 mb
Low level cloud: 50%
Mid level cloud: 43%
High level cloud: 76%
Most Significant Cloud Type: low
74%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
20:00

SSE
SSE

 7 / 13 mph 59 / 59°F 84% 1008 mb
Low level cloud: 14%
Mid level cloud: 35%
High level cloud: 60%
Most Significant Cloud Type: low
33%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
23:00

SSW
SSW

 5 / 8 mph 58 / 58°F 82% 1009 mb
Low level cloud: 37%
Mid level cloud: 89%
High level cloud: 58%
Most Significant Cloud Type: low
74%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
Fri 28
Nov		02:00

SE
SE

 3 / 5 mph 55 / 55°F 81% 1010 mb
Low level cloud: 4%
Mid level cloud: 91%
High level cloud: 77%
Most Significant Cloud Type: medium
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
05:00

ESE
ESE

 8 / 13 mph 54 / 51°F 78% 1010 mb
Low level cloud: 0%
Mid level cloud: 93%
High level cloud: 100%
Most Significant Cloud Type: medium
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

E
E

 10 / 15 mph 55 / 52°F 79% 1010 mb
Low level cloud: 8%
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
11:00

E
E

 8 / 10 mph 57 / 55°F 85% 1011 mb
Low level cloud: 70%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
14:00

ENE
ENE

 8 / 9 mph 59 / 57°F 77% 1010 mb
Low level cloud: 25%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
52%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
17:00

ESE
ESE

 7 / 10 mph 58 / 57°F 72% 1010 mb
Low level cloud: 1%
Mid level cloud: 57%
High level cloud: 100%
Most Significant Cloud Type: medium
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

E
E

 6 / 10 mph 57 / 55°F 71% 1011 mb
Low level cloud: 0%
Mid level cloud: 49%
High level cloud: 100%
Most Significant Cloud Type: medium
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

NE
NE

 7 / 11 mph 56 / 54°F 71% 1010 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 100%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 29
Nov		02:00

SE
SE

 5 / 8 mph 55 / 54°F 74% 1010 mb
Low level cloud: 3%
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
05:00

ESE
ESE

 2 / 2 mph 54 / 54°F 78% 1009 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 35%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

N
N

 3 / 5 mph 56 / 55°F 74% 1009 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 99%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

N
N

 5 / 6 mph 59 / 58°F 65% 1009 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 31%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

NW
NW

 6 / 7 mph 62 / 61°F 63% 1008 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 30%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

NW
NW

 7 / 9 mph 61 / 60°F 69% 1008 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 52%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

NW
NW

 9 / 13 mph 58 / 56°F 74% 1009 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 33%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

NNW
NNW

 7 / 11 mph 56 / 55°F 75% 1010 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 22%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 30
Nov		02:00

N
N

 5 / 10 mph 51 / 49°F 63% 1014 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 1%
Most Significant Cloud Type: medium
5%
0.0 In
08:00

ENE
ENE

 10 / 20 mph 54 / 51°F 67% 1014 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 46%
Most Significant Cloud Type: medium
45%
0.0 In
14:00

NW
NW

 4 / 9 mph 63 / 63°F 60% 1014 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
20:00

NNW
NNW

 9 / 18 mph 55 / 53°F 87% 1014 mb
Low level cloud: 61%
Mid level cloud: 44%
High level cloud: 13%
Most Significant Cloud Type: low
78%
0.0 In
Mon 01
Dec		02:00

NW
NW

 3 / 6 mph 57 / 58°F 70% 1023 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 4%
Most Significant Cloud Type: medium
20%
0.0 In
08:00

ENE
ENE

 3 / 7 mph 56 / 56°F 73% 1024 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 1%
Most Significant Cloud Type: medium
16%
0.0 In
14:00

ENE
ENE

 2 / 5 mph 64 / 64°F 56% 1020 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
20:00

N
N

 3 / 5 mph 59 / 60°F 65% 1025 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 95%
Most Significant Cloud Type: medium
100%
0.0 In
Tue 02
Dec		02:00

ENE
ENE

 3 / 6 mph 56 / 57°F 69% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 93%
Most Significant Cloud Type: high
93%
0.0 In
08:00

ENE
ENE

 2 / 5 mph 57 / 58°F 67% 1025 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 11%
Most Significant Cloud Type: medium
45%
0.0 In
14:00

NW
NW

 2 / 5 mph 61 / 61°F 58% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 60%
Most Significant Cloud Type: high
60%
0.0 In
20:00

N
N

 3 / 6 mph 62 / 62°F 64% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Wed 03
Dec		02:00

ENE
ENE

 3 / 7 mph 57 / 57°F 68% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
08:00

E
E

 5 / 11 mph 54 / 53°F 66% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
14:00

ENE
ENE

 1 / 2 mph 63 / 63°F 55% 1025 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
20:00

NNW
NNW

 4 / 8 mph 59 / 59°F 60% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Thu 04
Dec		02:00

ESE
ESE

 5 / 11 mph 54 / 53°F 66% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
08:00

ENE
ENE

 4 / 9 mph 54 / 53°F 54% 1026 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

 2 / 4 mph 64 / 64°F 50% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
20:00

N
N

 2 / 4 mph 60 / 60°F 58% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Fri 05
Dec		02:00

SE
SE

 3 / 6 mph 56 / 57°F 67% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
3%
0.0 In
08:00

NE
NE

 2 / 4 mph 56 / 57°F 58% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
14:00

N
N

 2 / 4 mph 61 / 61°F 59% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
31%
0.0 In
20:00

NNW
NNW

 3 / 7 mph 59 / 59°F 58% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sat 06
Dec		02:00

ESE
ESE

 3 / 6 mph 57 / 58°F 63% 1027 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: medium
12%
0.0 In
08:00

NE
NE

 2 / 4 mph 55 / 57°F 60% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
14:00

NNW
NNW

 1 / 2 mph 64 / 64°F 53% 1026 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 32%
Most Significant Cloud Type: medium
9%
0.0 In
20:00

ENE
ENE

 2 / 3 mph 60 / 60°F 56% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: high
10%
0.0 In
Sun 07
Dec		02:00

ENE
ENE

 4 / 8 mph 54 / 54°F 60% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 12%
Most Significant Cloud Type: high
11%
0.0 In
08:00

ESE
ESE

 7 / 16 mph 52 / 49°F 70% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
14:00

NW
NW

 1 / 2 mph 63 / 63°F 46% 1027 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 41%
Most Significant Cloud Type: medium
2%
0.0 In
20:00

SE
SE

 12 / 25 mph 54 / 51°F 62% 1019 mb
Low level cloud: 19%
Mid level cloud: 8%
High level cloud: 51%
Most Significant Cloud Type: low
28%
0.0 In
Mon 08
Dec		02:00

E
E

 4 / 7 mph 55 / 55°F 60% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
08:00

ESE
ESE

 15 / 32 mph 52 / 47°F 83% 1013 mb
Low level cloud: 81%
Mid level cloud: 93%
High level cloud: 48%
Most Significant Cloud Type: low
100%
0.5 In
14:00

NNW
NNW

 3 / 7 mph 63 / 63°F 53% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
20:00

ESE
ESE

 20 / 42 mph 54 / 49°F 80% 1007 mb
Low level cloud: 61%
Mid level cloud: 100%
High level cloud: 96%
Most Significant Cloud Type: low
100%
0.3 In

Other Locations Near to Ipsos

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