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Delaware City 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Delaware City

Delaware, United States Of America

Long range weather outlook for Delaware City includes 14 day forecast summary:

For Delaware City in the coming two weeks the average daytime maximum temperature will be around 33°C, with a high for the two weeks of 37°C expected on the afternoon of Tuesday 24th. The average minimum temperature will be 22°C, dipping to its lowest on the morning of Tuesday 17th at 17°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. It looks like Wednesday 18th will have the most precipitation with an accumulation of around 8.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Mon 16
Jun		01:00

NE
NE

 5 / 6 mph 62 / 62°F 89% 1020 mb
Low level cloud: 98%
Mid level cloud: 44%
High level cloud: 28%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

 7 / 10 mph 61 / 61°F 89% 1019 mb
Low level cloud: 100%
Mid level cloud: 26%
High level cloud: 22%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 6 / 8 mph 62 / 62°F 90% 1020 mb
Low level cloud: 98%
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
10:00

ENE
ENE

 7 / 8 mph 67 / 67°F 86% 1020 mb
Low level cloud: 100%
Mid level cloud: 68%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ENE
ENE

 5 / 5 mph 70 / 70°F 84% 1019 mb
Low level cloud: 99%
Mid level cloud: 62%
High level cloud: 60%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

E
E

 6 / 7 mph 71 / 70°F 83% 1017 mb
Low level cloud: 97%
Mid level cloud: 29%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

E
E

 5 / 7 mph 69 / 69°F 87% 1017 mb
Low level cloud: 96%
Mid level cloud: 29%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

 6 / 9 mph 66 / 66°F 92% 1018 mb
Low level cloud: 78%
Mid level cloud: 46%
High level cloud: 8%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 17
Jun		19:00

SSE
SSE

 7 / 11 mph 76 / 77°F 86% 1015 mb
Low level cloud: 44%
Mid level cloud: 28%
High level cloud: 8%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 5 / 8 mph 70 / 70°F 95% 1015 mb
Low level cloud: 44%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 18
Jun		01:00

S
S

 6 / 10 mph 69 / 69°F 97% 1014 mb
Low level cloud: 45%
Mid level cloud: 12%
High level cloud: 22%
Most Significant Cloud Type: low
51%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
04:00

S
S

 5 / 9 mph 68 / 68°F 98% 1014 mb
Low level cloud: 58%
Mid level cloud: 27%
High level cloud: 21%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

 5 / 7 mph 78 / 78°F 92% 1014 mb
Low level cloud: 60%
Mid level cloud: 20%
High level cloud: 12%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 7 / 8 mph 88 / 92°F 68% 1014 mb
Low level cloud: 48%
Mid level cloud: 15%
High level cloud: 9%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 10 / 12 mph 91 / 97°F 55% 1013 mb
Low level cloud: 47%
Mid level cloud: 16%
High level cloud: 4%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

 4 / 5 mph 92 / 97°F 58% 1012 mb
Low level cloud: 1%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SW
SW

 1 / 2 mph 82 / 83°F 91% 1013 mb
Low level cloud: 0%
Mid level cloud: 35%
High level cloud: 0%
Most Significant Cloud Type: medium
35%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
22:00

SSW
SSW

 6 / 12 mph 74 / 79°F 94% 1013 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 19
Jun		01:00

SW
SW

 6 / 13 mph 73 / 77°F 94% 1013 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 5%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

 6 / 11 mph 71 / 71°F 95% 1013 mb
Low level cloud: 10%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 8 / 10 mph 78 / 80°F 86% 1013 mb
Low level cloud: 10%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 9 / 11 mph 88 / 91°F 60% 1013 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 16%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 12 / 14 mph 92 / 97°F 48% 1011 mb
Low level cloud: 9%
Mid level cloud: 19%
High level cloud: 3%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 11 / 15 mph 94 / 98°F 46% 1008 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
19:00

WSW
WSW

 8 / 12 mph 75 / 76°F 89% 1011 mb
Low level cloud: 1%
Mid level cloud: 24%
High level cloud: 13%
Most Significant Cloud Type: medium
26%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

SW
SW

 10 / 15 mph 70 / 70°F 88% 1012 mb
Low level cloud: 3%
Mid level cloud: 26%
High level cloud: 53%
Most Significant Cloud Type: medium
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 20
Jun		01:00

W
W

 10 / 16 mph 69 / 69°F 90% 1012 mb
Low level cloud: 21%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NW
NW

 7 / 11 mph 66 / 66°F 90% 1014 mb
Low level cloud: 2%
Mid level cloud: 2%
High level cloud: 10%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NW
NW

 7 / 9 mph 71 / 68°F 72% 1016 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
10:00

WNW
WNW

 7 / 8 mph 80 / 80°F 52% 1017 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 2%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

 11 / 13 mph 85 / 84°F 44% 1016 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
16:00

WSW
WSW

 10 / 12 mph 85 / 85°F 49% 1015 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 8%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SW
SW

 7 / 12 mph 81 / 82°F 71% 1015 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 6%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 6 / 12 mph 71 / 71°F 80% 1017 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 2%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 21
Jun		01:00

W
W

 5 / 10 mph 69 / 69°F 87% 1017 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 17%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WNW
WNW

 6 / 12 mph 68 / 68°F 92% 1017 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WNW
WNW

 6 / 9 mph 78 / 78°F 81% 1018 mb
Low level cloud: 4%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WNW
WNW

 8 / 9 mph 85 / 85°F 63% 1018 mb
Low level cloud: 11%
Mid level cloud: 9%
High level cloud: 32%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

 10 / 11 mph 89 / 92°F 54% 1017 mb
Low level cloud: 73%
Mid level cloud: 4%
High level cloud: 2%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

 7 / 9 mph 90 / 93°F 52% 1017 mb
Low level cloud: 3%
Mid level cloud: 7%
High level cloud: 1%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

 5 / 11 mph 84 / 85°F 74% 1017 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 21%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

 6 / 13 mph 76 / 80°F 75% 1017 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 11%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 22
Jun		01:00

SSW
SSW

 9 / 17 mph 75 / 79°F 76% 1015 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 19%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

 7 / 14 mph 74 / 77°F 82% 1015 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 9%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

W
W

 8 / 13 mph 79 / 81°F 72% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WNW
WNW

 12 / 14 mph 88 / 93°F 61% 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
13:00

WNW
WNW

 13 / 15 mph 94 / 103°F 54% 1016 mb
Low level cloud: 76%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

 9 / 13 mph 96 / 105°F 53% 1014 mb
Low level cloud: 8%
Mid level cloud: 49%
High level cloud: 0%
Most Significant Cloud Type: medium
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WSW
WSW

 4 / 9 mph 90 / 99°F 72% 1015 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WNW
WNW

 7 / 13 mph 84 / 92°F 78% 1015 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Mon 23
Jun		01:00

ESE
ESE

 4 / 8 mph 78 / 83°F 91% 1018 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.0 In
07:00

NE
NE

 5 / 11 mph 79 / 85°F 90% 1021 mb
Low level cloud: 13%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
23%
0.0 In
13:00

WNW
WNW

 8 / 16 mph 95 / 110°F 57% 1017 mb
Low level cloud: 14%
Mid level cloud: 28%
High level cloud: 3%
Most Significant Cloud Type: low
24%
0.0 In
19:00

W
W

 5 / 11 mph 91 / 110°F 71% 1020 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
Tue 24
Jun		01:00

SSW
SSW

 5 / 11 mph 69 / 69°F 82% 1022 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
07:00

NNW
NNW

 6 / 13 mph 87 / 97°F 69% 1020 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
13:00

WSW
WSW

 4 / 9 mph 99 / 118°F 51% 1020 mb
Low level cloud: 2%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
3%
0.0 In
19:00

W
W

 6 / 11 mph 92 / 107°F 65% 1017 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
Wed 25
Jun		01:00

WSW
WSW

 6 / 12 mph 82 / 90°F 85% 1019 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
07:00

NNW
NNW

 6 / 10 mph 88 / 98°F 68% 1019 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
13:00

WSW
WSW

 6 / 14 mph 99 / 115°F 47% 1018 mb
Low level cloud: 3%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
0.0 In
19:00

W
W

 5 / 9 mph 93 / 109°F 65% 1016 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
Thu 26
Jun		01:00

W
W

 4 / 9 mph 80 / 89°F 91% 1018 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 6%
Most Significant Cloud Type: medium
9%
0.1 In
07:00

WNW
WNW

 3 / 6 mph 85 / 96°F 79% 1017 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.1 In
13:00

SW
SW

 8 / 16 mph 96 / 106°F 47% 1018 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 3%
Most Significant Cloud Type: medium
5%
0.0 In
19:00

W
W

 5 / 10 mph 92 / 109°F 65% 1015 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 2%
Most Significant Cloud Type: medium
2%
0.0 In
Fri 27
Jun		01:00

SSW
SSW

 5 / 11 mph 81 / 88°F 85% 1018 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
07:00

SW
SW

 2 / 5 mph 88 / 103°F 75% 1018 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
13:00

SW
SW

 8 / 17 mph 99 / 109°F 42% 1017 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
19:00

S
S

 3 / 6 mph 92 / 112°F 71% 1015 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
Sat 28
Jun		01:00

SSW
SSW

 4 / 9 mph 84 / 94°F 80% 1017 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
0.0 In
07:00

W
W

 3 / 7 mph 89 / 103°F 70% 1017 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
13:00

W
W

 7 / 15 mph 98 / 108°F 42% 1017 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
19:00

W
W

 6 / 12 mph 81 / 86°F 78% 1015 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 25%
Most Significant Cloud Type: medium
11%
0.1 In
Sun 29
Jun		01:00

WNW
WNW

 4 / 8 mph 79 / 86°F 86% 1017 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 32%
Most Significant Cloud Type: medium
10%
0.1 In
07:00

WSW
WSW

 3 / 7 mph 82 / 89°F 77% 1016 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
0.0 In
13:00

W
W

 4 / 9 mph 89 / 98°F 58% 1017 mb
Low level cloud: 61%
Mid level cloud: 27%
High level cloud: 18%
Most Significant Cloud Type: low
73%
0.1 In
19:00

SW
SW

 3 / 6 mph 93 / 111°F 65% 1014 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 18%
Most Significant Cloud Type: medium
5%
0.0 In
Mon 30
Jun		01:00

ENE
ENE

 2 / 4 mph 75 / 80°F 98% 1018 mb
Low level cloud: 60%
Mid level cloud: 43%
High level cloud: 92%
Most Significant Cloud Type: low
86%
0.8 In
07:00

ESE
ESE

 1 / 3 mph 83 / 92°F 85% 1016 mb
Low level cloud: 12%
Mid level cloud: 18%
High level cloud: 77%
Most Significant Cloud Type: low
27%
0.1 In
13:00

S
S

 5 / 11 mph 76 / 81°F 97% 1019 mb
Low level cloud: 82%
Mid level cloud: 43%
High level cloud: 88%
Most Significant Cloud Type: low
100%
0.5 In
19:00

SE
SE

 7 / 14 mph 78 / 84°F 88% 1015 mb
Low level cloud: 5%
Mid level cloud: 46%
High level cloud: 13%
Most Significant Cloud Type: medium
61%
0.1 In
Tue 01
Jul		01:00

E
E

 4 / 8 mph 73 / 78°F 98% 1019 mb
Low level cloud: 96%
Mid level cloud: 98%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
07:00

SSW
SSW

 4 / 8 mph 78 / 85°F 90% 1018 mb
Low level cloud: 32%
Mid level cloud: 29%
High level cloud: 12%
Most Significant Cloud Type: low
43%
0.3 In
13:00

SE
SE

 2 / 4 mph 83 / 90°F 79% 1019 mb
Low level cloud: 83%
Mid level cloud: 32%
High level cloud: 1%
Most Significant Cloud Type: low
94%
0.1 In
19:00

SSE
SSE

 3 / 7 mph 85 / 96°F 78% 1015 mb
Low level cloud: 3%
Mid level cloud: 35%
High level cloud: 13%
Most Significant Cloud Type: medium
44%
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