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Cambridge 14 Day Long Range Forecast

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

Minnesota, United States Of America

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

Over the next 14 days the Cambridge forecast suggests the average daytime maximum temperature will be around 18°C, with a high for the two weeks of 23°C expected on the afternoon of Thursday 23rd. The mean minimum temperature will be 11°C, dipping to its lowest on the morning of Saturday 25th at 6°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain. The indicators are that Tuesday 21st will have the most precipitation with an accumulation of around 66.0mm. On the whole winds are likely to be moderate.

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

W
W

 7 / 15 mph 54 / 52°F 67% 1013 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
03:00

W
W

 6 / 13 mph 50 / 48°F 67% 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
06:00

SW
SW

 4 / 8 mph 54 / 52°F 67% 1015 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 9%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

 7 / 9 mph 66 / 65°F 49% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 5%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

 7 / 9 mph 72 / 70°F 35% 1014 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 69%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 13 / 16 mph 72 / 75°F 39% 1013 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 12%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

 11 / 17 mph 66 / 64°F 63% 1010 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 46%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

 6 / 11 mph 60 / 60°F 71% 1012 mb
Low level cloud: 0%
Mid level cloud: 50%
High level cloud: 3%
Most Significant Cloud Type: medium
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May		18:00

N
N

 9 / 13 mph 69 / 66°F 72% 1009 mb
Low level cloud: 60%
Mid level cloud: 17%
High level cloud: 6%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 7 / 14 mph 56 / 54°F 92% 1012 mb
Low level cloud: 3%
Mid level cloud: 4%
High level cloud: 53%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May		00:00

NE
NE

 8 / 15 mph 52 / 49°F 96% 1012 mb
Low level cloud: 19%
Mid level cloud: 4%
High level cloud: 6%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

 8 / 15 mph 49 / 46°F 96% 1011 mb
Low level cloud: 37%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

 13 / 19 mph 51 / 47°F 94% 1009 mb
Low level cloud: 83%
Mid level cloud: 50%
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

ENE
ENE

 16 / 23 mph 53 / 48°F 98% 1004 mb
Low level cloud: 93%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.9 In of precipitation over the past 3 hours.
0.9 In
12:00

ENE
ENE

 13 / 21 mph 56 / 52°F 98% 999 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
15:00

NE
NE

 14 / 26 mph 57 / 54°F 98% 994 mb
Low level cloud: 100%
Mid level cloud: 66%
High level cloud: 21%
Most Significant Cloud Type: low
100%
Expect 0.5 In of precipitation over the past 3 hours.
0.5 In
18:00

NE
NE

 9 / 16 mph 55 / 52°F 95% 992 mb
Low level cloud: 59%
Mid level cloud: 29%
High level cloud: 96%
Most Significant Cloud Type: low
80%
Expect 0.8 In of precipitation over the past 3 hours.
0.8 In
21:00

NNW
NNW

 15 / 22 mph 49 / 44°F 96% 995 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 0%
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

NW
NW

 18 / 27 mph 48 / 41°F 91% 1000 mb
Low level cloud: 100%
Mid level cloud: 99%
High level cloud: 56%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

NW
NW

 17 / 25 mph 46 / 40°F 91% 1003 mb
Low level cloud: 97%
Mid level cloud: 24%
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

NNW
NNW

 12 / 17 mph 49 / 44°F 86% 1005 mb
Low level cloud: 100%
Mid level cloud: 32%
High level cloud: 48%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NW
NW

 10 / 14 mph 50 / 46°F 86% 1008 mb
Low level cloud: 89%
Mid level cloud: 82%
High level cloud: 48%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

 11 / 12 mph 59 / 57°F 64% 1008 mb
Low level cloud: 74%
Mid level cloud: 22%
High level cloud: 100%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

 12 / 15 mph 63 / 62°F 63% 1008 mb
Low level cloud: 55%
Mid level cloud: 23%
High level cloud: 100%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 12 / 19 mph 61 / 60°F 72% 1009 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 7 / 14 mph 53 / 50°F 88% 1011 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 17%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May		00:00

W
W

 7 / 14 mph 50 / 48°F 90% 1012 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
03:00

WSW
WSW

 6 / 13 mph 49 / 46°F 93% 1014 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

 4 / 7 mph 52 / 50°F 88% 1014 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
09:00

WSW
WSW

 3 / 4 mph 65 / 62°F 67% 1015 mb
Low level cloud: 1%
Mid level cloud: 10%
High level cloud: 13%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 4 / 5 mph 72 / 69°F 55% 1014 mb
Low level cloud: 25%
Mid level cloud: 12%
High level cloud: 5%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

 7 / 9 mph 74 / 76°F 50% 1013 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 8%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

 11 / 17 mph 68 / 66°F 67% 1011 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 9%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

 10 / 21 mph 59 / 57°F 82% 1010 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 6%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 24
May		00:00

SSE
SSE

 12 / 20 mph 60 / 60°F 69% 1012 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 33%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

 12 / 21 mph 57 / 54°F 78% 1009 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 82%
Most Significant Cloud Type: high
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

 15 / 23 mph 57 / 52°F 83% 1006 mb
Low level cloud: 5%
Mid level cloud: 45%
High level cloud: 85%
Most Significant Cloud Type: medium
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 17 / 24 mph 55 / 50°F 95% 1005 mb
Low level cloud: 100%
Mid level cloud: 92%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
12:00

S
S

 14 / 20 mph 56 / 53°F 97% 1004 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

WNW
WNW

 10 / 13 mph 57 / 54°F 83% 1005 mb
Low level cloud: 69%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
75%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

WNW
WNW

 12 / 17 mph 57 / 53°F 78% 1007 mb
Low level cloud: 27%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

 7 / 10 mph 53 / 51°F 70% 1009 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 25
May		00:00

WNW
WNW

 5 / 10 mph 47 / 44°F 88% 1010 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
03:00

WSW
WSW

 5 / 10 mph 45 / 43°F 90% 1010 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
06:00

SSW
SSW

 4 / 7 mph 48 / 45°F 84% 1011 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 17%
Most Significant Cloud Type: high
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

 11 / 12 mph 60 / 57°F 64% 1009 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 100%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 13 / 14 mph 67 / 65°F 51% 1008 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 32%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 14 / 17 mph 71 / 70°F 51% 1006 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 3%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

 11 / 19 mph 68 / 67°F 63% 1005 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

 11 / 20 mph 64 / 64°F 64% 1006 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 32%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 26
May		00:00

WSW
WSW

 6 / 13 mph 47 / 44°F 93% 1009 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
06:00

WNW
WNW

 4 / 8 mph 46 / 45°F 85% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 30%
Most Significant Cloud Type: medium
6%
0.0 In
12:00

ENE
ENE

 11 / 22 mph 61 / 61°F 59% 1014 mb
Low level cloud: 36%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
50%
0.0 In
18:00

WNW
WNW

 8 / 18 mph 58 / 57°F 70% 1011 mb
Low level cloud: 53%
Mid level cloud: 66%
High level cloud: 53%
Most Significant Cloud Type: low
81%
0.0 In
Mon 27
May		00:00

S
S

 19 / 41 mph 60 / 60°F 88% 1005 mb
Low level cloud: 49%
Mid level cloud: 29%
High level cloud: 100%
Most Significant Cloud Type: low
70%
0.0 In
06:00

SSE
SSE

 5 / 10 mph 52 / 51°F 68% 1019 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
0.0 In
12:00

WNW
WNW

 4 / 8 mph 68 / 68°F 46% 1020 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
0.0 In
18:00

NE
NE

 8 / 16 mph 68 / 68°F 75% 1012 mb
Low level cloud: 2%
Mid level cloud: 24%
High level cloud: 14%
Most Significant Cloud Type: medium
29%
0.0 In
Tue 28
May		00:00

NE
NE

 4 / 8 mph 54 / 54°F 78% 1023 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
0.0 In
06:00

NW
NW

 7 / 15 mph 53 / 51°F 92% 1017 mb
Low level cloud: 50%
Mid level cloud: 70%
High level cloud: 10%
Most Significant Cloud Type: low
75%
0.0 In
12:00

SW
SW

 3 / 6 mph 69 / 69°F 55% 1025 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 14%
Most Significant Cloud Type: medium
14%
0.0 In
18:00

NW
NW

 11 / 23 mph 59 / 56°F 88% 1021 mb
Low level cloud: 5%
Mid level cloud: 63%
High level cloud: 22%
Most Significant Cloud Type: medium
77%
0.2 In
Wed 29
May		00:00

W
W

 1 / 2 mph 60 / 60°F 81% 1024 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
06:00

NW
NW

 7 / 14 mph 53 / 51°F 95% 1023 mb
Low level cloud: 11%
Mid level cloud: 49%
High level cloud: 99%
Most Significant Cloud Type: medium
84%
0.0 In
12:00

NE
NE

 3 / 6 mph 76 / 78°F 46% 1024 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 1%
Most Significant Cloud Type: medium
24%
0.0 In
18:00

NNW
NNW

 2 / 4 mph 68 / 68°F 62% 1022 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 12%
Most Significant Cloud Type: medium
20%
0.1 In
Thu 30
May		00:00

NNE
NNE

 1 / 2 mph 62 / 62°F 73% 1023 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
0.0 In
06:00

NNE
NNE

 3 / 6 mph 56 / 56°F 82% 1025 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
12:00

SSE
SSE

 6 / 12 mph 74 / 77°F 48% 1022 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
0.0 In
18:00

WNW
WNW

 6 / 12 mph 68 / 68°F 61% 1019 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 12%
Most Significant Cloud Type: medium
24%
0.0 In
Fri 31
May		00:00

SSW
SSW

 5 / 11 mph 58 / 57°F 69% 1020 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
06:00

W
W

 6 / 13 mph 56 / 54°F 79% 1019 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 7%
Most Significant Cloud Type: medium
10%
0.0 In
12:00

S
S

 11 / 23 mph 74 / 76°F 43% 1019 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
0.0 In
18:00

W
W

 8 / 16 mph 72 / 76°F 67% 1015 mb
Low level cloud: 11%
Mid level cloud: 6%
High level cloud: 33%
Most Significant Cloud Type: low
17%
0.0 In
Sat 01
Jun		00:00

SSE
SSE

 7 / 15 mph 60 / 60°F 80% 1017 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 26%
Most Significant Cloud Type: medium
27%
0.0 In
06:00

WSW
WSW

 5 / 10 mph 59 / 59°F 84% 1017 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
12:00

SE
SE

 9 / 20 mph 61 / 61°F 90% 1017 mb
Low level cloud: 38%
Mid level cloud: 43%
High level cloud: 2%
Most Significant Cloud Type: low
53%
0.2 In
18:00

SSW
SSW

 9 / 18 mph 73 / 77°F 63% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sun 02
Jun		00:00

SE
SE

 5 / 11 mph 59 / 58°F 96% 1015 mb
Low level cloud: 10%
Mid level cloud: 15%
High level cloud: 99%
Most Significant Cloud Type: medium
45%
0.0 In
06:00

SSE
SSE

 8 / 17 mph 59 / 59°F 86% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

SSE
SSE

 7 / 15 mph 76 / 79°F 62% 1012 mb
Low level cloud: 23%
Mid level cloud: 5%
High level cloud: 32%
Most Significant Cloud Type: low
28%
0.0 In
18:00

SSE
SSE

 13 / 26 mph 71 / 71°F 68% 1011 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 94%
Most Significant Cloud Type: medium
15%
0.0 In
Mon 03
Jun		00:00

ESE
ESE

 5 / 11 mph 63 / 63°F 96% 1010 mb
Low level cloud: 5%
Mid level cloud: 48%
High level cloud: 97%
Most Significant Cloud Type: medium
65%
0.1 In
06:00

SE
SE

 13 / 27 mph 63 / 63°F 95% 1008 mb
Low level cloud: 99%
Mid level cloud: 29%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.3 In
12:00

SW
SW

 1 / 2 mph 67 / 67°F 89% 1009 mb
Low level cloud: 0%
Mid level cloud: 49%
High level cloud: 15%
Most Significant Cloud Type: medium
50%
0.2 In
18:00

W
W

 5 / 10 mph 69 / 69°F 87% 1003 mb
Low level cloud: 40%
Mid level cloud: 31%
High level cloud: 34%
Most Significant Cloud Type: low
54%
0.4 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