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Concord 14 Day Long Range Forecast

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

Massachusetts, United States Of America

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

Reviewing the forecast for Concord Over the next 14 days and the average daytime maximum temperature will be around 18°C, with a high for the two weeks of 27°C expected on the afternoon of Saturday 19th. The average minimum temperature will be 8°C, dipping to its lowest on the morning of Monday 21st at 3°C. Expect the coming 14 days to have some days seeing a little precipitation and some days with rain. It looks like Saturday 19th will have the most precipitation with an accumulation of around 11.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sat 19
Apr		16:00

WSW
WSW

 12 / 16 mph 81 / 81°F 53% 1009 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 11%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SW
SW

 7 / 14 mph 72 / 68°F 86% 1010 mb
Low level cloud: 35%
Mid level cloud: 53%
High level cloud: 38%
Most Significant Cloud Type: low
58%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

W
W

 12 / 19 mph 67 / 67°F 83% 1012 mb
Low level cloud: 19%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
34%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
Sun 20
Apr		01:00

W
W

 16 / 23 mph 61 / 61°F 75% 1014 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
04:00

WNW
WNW

 15 / 17 mph 54 / 50°F 58% 1015 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
07:00

NW
NW

 16 / 18 mph 52 / 47°F 60% 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
10:00

NW
NW

 16 / 19 mph 55 / 50°F 38% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NW
NW

 16 / 18 mph 58 / 54°F 29% 1023 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
16:00

NW
NW

 12 / 14 mph 58 / 55°F 31% 1024 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
19:00

NNW
NNW

 10 / 13 mph 52 / 48°F 40% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: high
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NW
NW

 9 / 10 mph 49 / 46°F 46% 1027 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
Mon 21
Apr		01:00

NW
NW

 5 / 8 mph 43 / 40°F 50% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: high
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WNW
WNW

 5 / 8 mph 39 / 36°F 58% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: high
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNW
NNW

 3 / 4 mph 45 / 43°F 43% 1028 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 6%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 2 / 3 mph 58 / 58°F 26% 1026 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 13%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 5 / 6 mph 66 / 64°F 22% 1023 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 51%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSE
SSE

 5 / 6 mph 64 / 62°F 36% 1021 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 93%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 10 / 13 mph 53 / 50°F 50% 1021 mb
Low level cloud: 17%
Mid level cloud: 82%
High level cloud: 97%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

 9 / 12 mph 50 / 47°F 50% 1019 mb
Low level cloud: 99%
Mid level cloud: 45%
High level cloud: 59%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 22
Apr		01:00

S
S

 8 / 10 mph 48 / 45°F 74% 1017 mb
Low level cloud: 92%
Mid level cloud: 79%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 7 / 11 mph 48 / 45°F 93% 1015 mb
Low level cloud: 100%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
07:00

S
S

 7 / 10 mph 50 / 47°F 96% 1013 mb
Low level cloud: 97%
Mid level cloud: 16%
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

SW
SW

 8 / 9 mph 58 / 56°F 86% 1012 mb
Low level cloud: 99%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 9 / 11 mph 69 / 68°F 55% 1010 mb
Low level cloud: 73%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

 13 / 15 mph 68 / 66°F 48% 1011 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
19:00

WNW
WNW

 12 / 17 mph 55 / 50°F 57% 1015 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
22:00

WNW
WNW

 10 / 11 mph 49 / 45°F 70% 1017 mb
Low level cloud: 1%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 23
Apr		01:00

WNW
WNW

 7 / 10 mph 45 / 42°F 76% 1017 mb
Low level cloud: 24%
Mid level cloud: 3%
High level cloud: 4%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WNW
WNW

 6 / 8 mph 44 / 40°F 82% 1018 mb
Low level cloud: 4%
Mid level cloud: 1%
High level cloud: 17%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WNW
WNW

 6 / 7 mph 49 / 46°F 67% 1020 mb
Low level cloud: 2%
Mid level cloud: 3%
High level cloud: 8%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NW
NW

 6 / 7 mph 60 / 58°F 49% 1020 mb
Low level cloud: 75%
Mid level cloud: 4%
High level cloud: 10%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNW
NNW

 6 / 7 mph 66 / 63°F 44% 1019 mb
Low level cloud: 32%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

N
N

 8 / 9 mph 66 / 64°F 44% 1020 mb
Low level cloud: 10%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNE
NNE

 7 / 9 mph 56 / 52°F 64% 1023 mb
Low level cloud: 13%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

 4 / 6 mph 49 / 47°F 73% 1025 mb
Low level cloud: 61%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 24
Apr		01:00

N
N

 3 / 4 mph 46 / 46°F 78% 1026 mb
Low level cloud: 62%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

 2 / 3 mph 43 / 43°F 87% 1027 mb
Low level cloud: 65%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 2 / 2 mph 51 / 51°F 71% 1029 mb
Low level cloud: 46%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ENE
ENE

 2 / 2 mph 60 / 59°F 55% 1029 mb
Low level cloud: 56%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SE
SE

 4 / 4 mph 67 / 65°F 47% 1028 mb
Low level cloud: 8%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ESE
ESE

 9 / 10 mph 63 / 61°F 55% 1027 mb
Low level cloud: 37%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SE
SE

 7 / 10 mph 55 / 51°F 71% 1028 mb
Low level cloud: 28%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 6 / 8 mph 52 / 50°F 74% 1028 mb
Low level cloud: 0%
Mid level cloud: 77%
High level cloud: 53%
Most Significant Cloud Type: medium
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 25
Apr		01:00

SSE
SSE

 4 / 7 mph 48 / 47°F 82% 1028 mb
Low level cloud: 6%
Mid level cloud: 44%
High level cloud: 3%
Most Significant Cloud Type: medium
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

 6 / 9 mph 48 / 45°F 81% 1028 mb
Low level cloud: 2%
Mid level cloud: 67%
High level cloud: 18%
Most Significant Cloud Type: medium
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 7 / 10 mph 50 / 47°F 82% 1028 mb
Low level cloud: 5%
Mid level cloud: 87%
High level cloud: 6%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 10 / 15 mph 52 / 49°F 85% 1026 mb
Low level cloud: 16%
Mid level cloud: 61%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

 12 / 17 mph 54 / 51°F 91% 1023 mb
Low level cloud: 99%
Mid level cloud: 85%
High level cloud: 70%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

 13 / 20 mph 56 / 53°F 94% 1019 mb
Low level cloud: 100%
Mid level cloud: 94%
High level cloud: 6%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

SSW
SSW

 15 / 23 mph 58 / 54°F 91% 1017 mb
Low level cloud: 100%
Mid level cloud: 45%
High level cloud: 7%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 15 / 23 mph 58 / 55°F 93% 1015 mb
Low level cloud: 100%
Mid level cloud: 54%
High level cloud: 9%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sat 26
Apr		01:00

S
S

 2 / 3 mph 57 / 58°F 73% 1026 mb
Low level cloud: 48%
Mid level cloud: 42%
High level cloud: 0%
Most Significant Cloud Type: low
62%
0.0 In
07:00

S
S

 7 / 13 mph 56 / 55°F 92% 1019 mb
Low level cloud: 36%
Mid level cloud: 90%
High level cloud: 65%
Most Significant Cloud Type: low
75%
0.0 In
13:00

N
N

 5 / 6 mph 63 / 63°F 58% 1017 mb
Low level cloud: 30%
Mid level cloud: 47%
High level cloud: 100%
Most Significant Cloud Type: low
58%
0.0 In
19:00

NNW
NNW

 11 / 15 mph 50 / 45°F 51% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
Sun 27
Apr		01:00

NW
NW

 12 / 17 mph 45 / 40°F 65% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

NNW
NNW

 4 / 6 mph 58 / 58°F 59% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

WNW
WNW

 8 / 13 mph 71 / 71°F 28% 1025 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
19:00

NNE
NNE

 3 / 5 mph 60 / 60°F 38% 1031 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Mon 28
Apr		01:00

NE
NE

 5 / 9 mph 55 / 54°F 61% 1029 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
07:00

SW
SW

 2 / 4 mph 55 / 56°F 55% 1035 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

ESE
ESE

 7 / 12 mph 67 / 67°F 42% 1027 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: medium
13%
0.0 In
19:00

SSW
SSW

 9 / 15 mph 55 / 53°F 43% 1032 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 52%
Most Significant Cloud Type: medium
10%
0.0 In
Tue 29
Apr		01:00

S
S

 10 / 16 mph 52 / 49°F 95% 1021 mb
Low level cloud: 100%
Mid level cloud: 88%
High level cloud: 56%
Most Significant Cloud Type: low
100%
0.3 In
07:00

S
S

 10 / 16 mph 55 / 52°F 75% 1027 mb
Low level cloud: 39%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
54%
0.0 In
13:00

SW
SW

 7 / 13 mph 62 / 62°F 90% 1015 mb
Low level cloud: 98%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
19:00

SSW
SSW

 12 / 20 mph 60 / 60°F 89% 1019 mb
Low level cloud: 100%
Mid level cloud: 46%
High level cloud: 8%
Most Significant Cloud Type: low
100%
0.0 In
Wed 30
Apr		01:00

SSW
SSW

 9 / 15 mph 61 / 61°F 95% 1011 mb
Low level cloud: 83%
Mid level cloud: 26%
High level cloud: 33%
Most Significant Cloud Type: low
95%
0.0 In
07:00

WSW
WSW

 8 / 13 mph 60 / 60°F 96% 1014 mb
Low level cloud: 92%
Mid level cloud: 98%
High level cloud: 93%
Most Significant Cloud Type: low
100%
0.1 In
13:00

SSW
SSW

 17 / 29 mph 81 / 82°F 51% 1006 mb
Low level cloud: 2%
Mid level cloud: 13%
High level cloud: 6%
Most Significant Cloud Type: medium
18%
0.0 In
19:00

NNW
NNW

 3 / 6 mph 65 / 65°F 61% 1015 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
8%
0.1 In
Thu 01
May		01:00

SSW
SSW

 11 / 19 mph 62 / 62°F 92% 1005 mb
Low level cloud: 100%
Mid level cloud: 49%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
07:00

N
N

 4 / 7 mph 61 / 61°F 55% 1018 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
13:00

NNW
NNW

 6 / 11 mph 69 / 69°F 48% 1012 mb
Low level cloud: 25%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: low
36%
0.1 In
19:00

SE
SE

 4 / 7 mph 63 / 63°F 53% 1018 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 35%
Most Significant Cloud Type: medium
22%
0.0 In
Fri 02
May		01:00

NE
NE

 6 / 11 mph 56 / 55°F 74% 1022 mb
Low level cloud: 78%
Mid level cloud: 26%
High level cloud: 98%
Most Significant Cloud Type: low
99%
0.0 In
07:00

NE
NE

 7 / 12 mph 56 / 54°F 61% 1023 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 100%
Most Significant Cloud Type: medium
25%
0.0 In
13:00

ESE
ESE

 9 / 16 mph 63 / 63°F 44% 1026 mb
Low level cloud: 5%
Mid level cloud: 30%
High level cloud: 32%
Most Significant Cloud Type: medium
45%
0.0 In
19:00

ENE
ENE

 7 / 12 mph 55 / 53°F 74% 1023 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 100%
Most Significant Cloud Type: medium
5%
0.0 In
Sat 03
May		01:00

SE
SE

 3 / 5 mph 55 / 56°F 79% 1027 mb
Low level cloud: 25%
Mid level cloud: 7%
High level cloud: 5%
Most Significant Cloud Type: low
27%
0.0 In
07:00

NE
NE

 10 / 17 mph 44 / 38°F 93% 1020 mb
Low level cloud: 100%
Mid level cloud: 78%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
13:00

ESE
ESE

 10 / 17 mph 66 / 66°F 38% 1024 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
19:00

NE
NE

 13 / 23 mph 43 / 37°F 96% 1016 mb
Low level cloud: 100%
Mid level cloud: 74%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.6 In
Sun 04
May		01:00

ESE
ESE

 3 / 5 mph 51 / 51°F 86% 1022 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
3%
0.0 In
07:00

NE
NE

 13 / 23 mph 43 / 36°F 97% 1014 mb
Low level cloud: 100%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
13:00

E
E

 9 / 17 mph 53 / 50°F 83% 1018 mb
Low level cloud: 100%
Mid level cloud: 43%
High level cloud: 17%
Most Significant Cloud Type: low
100%
0.0 In
19:00

NE
NE

 10 / 21 mph 48 / 44°F 98% 1010 mb
Low level cloud: 100%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 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