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Calladrum 14 Day Long Range Forecast

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

Aberdeenshire, United Kingdom

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

Over the next 14 days the Calladrum forecast suggests the average daytime maximum temperature will be around 18°C, with a high for the two weeks of 20°C expected on the afternoon of Saturday 25th. The mean minimum temperature will be 8°C, dipping to its lowest on the morning of Tuesday 21st at 3°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. The current forecast indicates Wednesday 22nd will have the most precipitation with an accumulation of around 35.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityCloud AmountPrecip AmountWeather
Sun 19
May		00:00

ENE
ENE

 2 / 2 mph 53 / 53°F 93%
Low level cloud: 88%
Mid level cloud: 46%
High level cloud: 22%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

 2 / 2 mph 52 / 52°F 92%
Low level cloud: 89%
Mid level cloud: 46%
High level cloud: 34%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 2 / 2 mph 54 / 55°F 89%
Low level cloud: 83%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

 3 / 3 mph 56 / 56°F 84%
Low level cloud: 94%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

 4 / 4 mph 59 / 59°F 77%
Low level cloud: 92%
Mid level cloud: 25%
High level cloud: 63%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

 5 / 6 mph 60 / 59°F 74%
Low level cloud: 78%
Mid level cloud: 45%
High level cloud: 92%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

 4 / 4 mph 56 / 56°F 82%
Low level cloud: 85%
Mid level cloud: 56%
High level cloud: 46%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

 2 / 3 mph 52 / 52°F 92%
Low level cloud: 93%
Mid level cloud: 21%
High level cloud: 20%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May		00:00

E
E

 2 / 2 mph 50 / 51°F 93%
Low level cloud: 68%
Mid level cloud: 16%
High level cloud: 20%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

 2 / 3 mph 48 / 48°F 96%
Low level cloud: 71%
Mid level cloud: 21%
High level cloud: 16%
Most Significant Cloud Type: low
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

 2 / 3 mph 54 / 53°F 90%
Low level cloud: 57%
Mid level cloud: 17%
High level cloud: 16%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

 4 / 5 mph 60 / 59°F 73%
Low level cloud: 85%
Mid level cloud: 9%
High level cloud: 6%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

 6 / 6 mph 62 / 61°F 67%
Low level cloud: 82%
Mid level cloud: 7%
High level cloud: 1%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

 6 / 7 mph 65 / 63°F 60%
Low level cloud: 1%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

 6 / 7 mph 62 / 60°F 70%
Low level cloud: 3%
Mid level cloud: 7%
High level cloud: 2%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

 2 / 3 mph 45 / 45°F 90%
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 5%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May		00:00

NW
NW

 1 / 3 mph 41 / 41°F 89%
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 4%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

 2 / 4 mph 38 / 38°F 87%
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
06:00

N
N

 2 / 3 mph 50 / 50°F 68%
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 2%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 4 / 5 mph 63 / 61°F 50%
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 97%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

 6 / 7 mph 65 / 64°F 69%
Low level cloud: 27%
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
15:00

E
E

 6 / 6 mph 67 / 64°F 74%
Low level cloud: 51%
Mid level cloud: 44%
High level cloud: 33%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

 5 / 6 mph 58 / 58°F 90%
Low level cloud: 98%
Mid level cloud: 27%
High level cloud: 14%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

 2 / 2 mph 53 / 53°F 99%
Low level cloud: 99%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May		00:00

ENE
ENE

 2 / 3 mph 52 / 53°F 99%
Low level cloud: 99%
Mid level cloud: 64%
High level cloud: 79%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

 1 / 2 mph 52 / 52°F 99%
Low level cloud: 94%
Mid level cloud: 22%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

 2 / 2 mph 55 / 54°F 98%
Low level cloud: 91%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

 0 / 0 mph 58 / 58°F 90%
Low level cloud: 90%
Mid level cloud: 68%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 4 / 5 mph 63 / 62°F 77%
Low level cloud: 73%
Mid level cloud: 59%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

 5 / 5 mph 59 / 59°F 95%
Low level cloud: 84%
Mid level cloud: 62%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

N
N

 8 / 10 mph 56 / 54°F 98%
Low level cloud: 94%
Mid level cloud: 97%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
21:00

N
N

 10 / 13 mph 53 / 50°F 98%
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 90%
Most Significant Cloud Type: low
100%
Expect 1.0 In of precipitation over the past 3 hours.
1.0 In
Thu 23
May		00:00

NNW
NNW

 8 / 10 mph 53 / 50°F 98%
Low level cloud: 100%
Mid level cloud: 58%
High level cloud: 6%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

NNW
NNW

 6 / 9 mph 52 / 49°F 98%
Low level cloud: 100%
Mid level cloud: 99%
High level cloud: 14%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

 6 / 9 mph 51 / 49°F 98%
Low level cloud: 99%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 8 / 11 mph 52 / 50°F 98%
Low level cloud: 99%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

 10 / 11 mph 55 / 52°F 98%
Low level cloud: 100%
Mid level cloud: 62%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

 10 / 11 mph 56 / 53°F 98%
Low level cloud: 100%
Mid level cloud: 95%
High level cloud: 14%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

 11 / 13 mph 55 / 51°F 98%
Low level cloud: 100%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

 7 / 8 mph 54 / 51°F 97%
Low level cloud: 97%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 24
May		00:00

SE
SE

 3 / 4 mph 52 / 52°F 98%
Low level cloud: 92%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

 3 / 4 mph 51 / 51°F 98%
Low level cloud: 88%
Mid level cloud: 20%
High level cloud: 4%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

 4 / 5 mph 55 / 53°F 93%
Low level cloud: 71%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

 9 / 10 mph 63 / 61°F 69%
Low level cloud: 0%
Mid level cloud: 47%
High level cloud: 33%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

 11 / 13 mph 66 / 64°F 55%
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 4%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 10 / 12 mph 65 / 64°F 59%
Low level cloud: 2%
Mid level cloud: 8%
High level cloud: 27%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

 6 / 7 mph 63 / 61°F 71%
Low level cloud: 1%
Mid level cloud: 6%
High level cloud: 65%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

 3 / 7 mph 48 / 46°F 93%
Low level cloud: 1%
Mid level cloud: 6%
High level cloud: 33%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 25
May		00:00

SW
SW

 2 / 5 mph 44 / 44°F 94%
Low level cloud: 4%
Mid level cloud: 25%
High level cloud: 2%
Most Significant Cloud Type: medium
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 2 / 4 mph 43 / 43°F 92%
Low level cloud: 10%
Mid level cloud: 88%
High level cloud: 37%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

 2 / 2 mph 56 / 54°F 79%
Low level cloud: 10%
Mid level cloud: 31%
High level cloud: 22%
Most Significant Cloud Type: medium
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

 5 / 6 mph 65 / 63°F 65%
Low level cloud: 26%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

 9 / 11 mph 68 / 66°F 60%
Low level cloud: 54%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 10 / 11 mph 67 / 66°F 62%
Low level cloud: 4%
Mid level cloud: 6%
High level cloud: 4%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

 6 / 7 mph 64 / 62°F 75%
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

 4 / 9 mph 49 / 47°F 94%
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 32%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityCloud AmountPrecip AmountWeather
Sun 26
May		00:00

SE
SE

 2 / 4 mph 46 / 46°F 98%
Low level cloud: 80%
Mid level cloud: 13%
High level cloud: 27%
Most Significant Cloud Type: low
100%
0.0 In
06:00

S
S

 5 / 8 mph 57 / 57°F 89%
Low level cloud: 26%
Mid level cloud: 80%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
12:00

SE
SE

 9 / 16 mph 58 / 56°F 84%
Low level cloud: 90%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SSE
SSE

 6 / 9 mph 69 / 69°F 78%
Low level cloud: 5%
Mid level cloud: 7%
High level cloud: 62%
Most Significant Cloud Type: medium
23%
0.0 In
Mon 27
May		00:00

S
S

 3 / 6 mph 54 / 53°F 93%
Low level cloud: 52%
Mid level cloud: 100%
High level cloud: 19%
Most Significant Cloud Type: low
89%
0.0 In
06:00

ESE
ESE

 2 / 3 mph 58 / 58°F 87%
Low level cloud: 21%
Mid level cloud: 11%
High level cloud: 99%
Most Significant Cloud Type: low
36%
0.0 In
12:00

SSW
SSW

 8 / 14 mph 64 / 64°F 63%
Low level cloud: 91%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
98%
0.1 In
18:00

ESE
ESE

 6 / 10 mph 65 / 65°F 75%
Low level cloud: 7%
Mid level cloud: 19%
High level cloud: 37%
Most Significant Cloud Type: low
18%
0.0 In
Tue 28
May		00:00

SW
SW

 3 / 7 mph 48 / 47°F 96%
Low level cloud: 4%
Mid level cloud: 29%
High level cloud: 32%
Most Significant Cloud Type: medium
40%
0.1 In
06:00

NE
NE

 2 / 2 mph 59 / 59°F 88%
Low level cloud: 21%
Mid level cloud: 8%
High level cloud: 33%
Most Significant Cloud Type: low
27%
0.0 In
12:00

SSE
SSE

 4 / 7 mph 64 / 64°F 72%
Low level cloud: 74%
Mid level cloud: 24%
High level cloud: 100%
Most Significant Cloud Type: low
94%
0.0 In
18:00

SE
SE

 4 / 7 mph 62 / 62°F 78%
Low level cloud: 12%
Mid level cloud: 98%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
Wed 29
May		00:00

NW
NW

 4 / 10 mph 52 / 51°F 98%
Low level cloud: 54%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.6 In
06:00

N
N

 1 / 1 mph 57 / 57°F 90%
Low level cloud: 38%
Mid level cloud: 24%
High level cloud: 100%
Most Significant Cloud Type: low
57%
0.0 In
12:00

NNW
NNW

 13 / 27 mph 58 / 56°F 72%
Low level cloud: 30%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
50%
0.2 In
18:00

SE
SE

 5 / 8 mph 60 / 60°F 78%
Low level cloud: 20%
Mid level cloud: 68%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
Thu 30
May		00:00

NNW
NNW

 5 / 11 mph 49 / 47°F 81%
Low level cloud: 76%
Mid level cloud: 18%
High level cloud: 12%
Most Significant Cloud Type: low
83%
0.0 In
06:00

NW
NW

 1 / 1 mph 52 / 52°F 98%
Low level cloud: 82%
Mid level cloud: 99%
High level cloud: 20%
Most Significant Cloud Type: low
100%
0.3 In
12:00

NNE
NNE

 2 / 5 mph 56 / 57°F 64%
Low level cloud: 86%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
97%
0.0 In
18:00

ESE
ESE

 3 / 6 mph 59 / 59°F 88%
Low level cloud: 58%
Mid level cloud: 28%
High level cloud: 1%
Most Significant Cloud Type: low
68%
0.1 In
Fri 31
May		00:00

ESE
ESE

 2 / 4 mph 48 / 49°F 98%
Low level cloud: 98%
Mid level cloud: 85%
High level cloud: 14%
Most Significant Cloud Type: low
100%
0.1 In
06:00

NNE
NNE

 2 / 4 mph 55 / 55°F 91%
Low level cloud: 36%
Mid level cloud: 57%
High level cloud: 21%
Most Significant Cloud Type: low
58%
0.0 In
12:00

ESE
ESE

 3 / 7 mph 50 / 50°F 95%
Low level cloud: 100%
Mid level cloud: 70%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
18:00

NNE
NNE

 6 / 11 mph 53 / 51°F 98%
Low level cloud: 98%
Mid level cloud: 100%
High level cloud: 55%
Most Significant Cloud Type: low
100%
0.1 In
Sat 01
Jun		00:00

SSE
SSE

 4 / 9 mph 48 / 46°F 94%
Low level cloud: 64%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: low
82%
0.0 In
06:00

NNE
NNE

 7 / 12 mph 49 / 46°F 99%
Low level cloud: 99%
Mid level cloud: 64%
High level cloud: 12%
Most Significant Cloud Type: low
100%
0.9 In
12:00

SE
SE

 8 / 17 mph 49 / 45°F 98%
Low level cloud: 100%
Mid level cloud: 83%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NNW
NNW

 8 / 14 mph 53 / 51°F 84%
Low level cloud: 81%
Mid level cloud: 91%
High level cloud: 94%
Most Significant Cloud Type: low
100%
0.2 In
Sun 02
Jun		00:00

SSW
SSW

 3 / 6 mph 52 / 52°F 99%
Low level cloud: 88%
Mid level cloud: 79%
High level cloud: 74%
Most Significant Cloud Type: low
100%
0.1 In
06:00

NNW
NNW

 3 / 6 mph 49 / 49°F 85%
Low level cloud: 88%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

S
S

 5 / 10 mph 57 / 56°F 99%
Low level cloud: 97%
Mid level cloud: 21%
High level cloud: 7%
Most Significant Cloud Type: low
100%
0.2 In
18:00

NE
NE

 5 / 10 mph 56 / 55°F 96%
Low level cloud: 99%
Mid level cloud: 48%
High level cloud: 11%
Most Significant Cloud Type: low
100%
0.1 In
Mon 03
Jun		00:00

S
S

 5 / 10 mph 50 / 48°F 97%
Low level cloud: 65%
Mid level cloud: 17%
High level cloud: 5%
Most Significant Cloud Type: low
72%
0.0 In
06:00

N
N

 5 / 10 mph 52 / 51°F 98%
Low level cloud: 98%
Mid level cloud: 56%
High level cloud: 3%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SW
SW

 17 / 36 mph 59 / 55°F 71%
Low level cloud: 34%
Mid level cloud: 9%
High level cloud: 85%
Most Significant Cloud Type: low
47%
0.0 In

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