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Jaffrey 14 Day Long Range Forecast

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

New Hampshire, United States Of America

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

For Jaffrey in the coming two weeks the average daytime maximum temperature will be around 0°C, with a high for the two weeks of 5°C expected on the afternoon of Thursday 27th. The mean minimum temperature will be -6°C, dipping to its lowest on the morning of Saturday 6th at -14°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain, sleet or snow. It looks like Saturday 6th will have the most precipitation with an accumulation of around 32.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 27
Nov
16:00

WSW
WSW

9 / 14 mph 36 / 29°F 61% 1009 mb
Low level cloud: 6%
Mid level cloud: 45%
High level cloud: 11%
Most Significant Cloud Type: medium
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WSW
WSW

9 / 13 mph 32 / 25°F 67% 1009 mb
Low level cloud: 12%
Mid level cloud: 23%
High level cloud: 32%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

9 / 13 mph 31 / 23°F 73% 1009 mb
Low level cloud: 5%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 28
Nov
01:00

WSW
WSW

9 / 14 mph 29 / 20°F 77% 1008 mb
Low level cloud: 12%
Mid level cloud: 5%
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

WSW
WSW

10 / 14 mph 28 / 19°F 77% 1007 mb
Low level cloud: 16%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

10 / 15 mph 28 / 18°F 77% 1006 mb
Low level cloud: 59%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

14 / 16 mph 35 / 25°F 55% 1006 mb
Low level cloud: 65%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

15 / 18 mph 35 / 25°F 63% 1005 mb
Low level cloud: 56%
Mid level cloud: 61%
High level cloud: 7%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

15 / 21 mph 30 / 19°F 69% 1008 mb
Low level cloud: 18%
Mid level cloud: 26%
High level cloud: 15%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

15 / 22 mph 29 / 17°F 63% 1011 mb
Low level cloud: 12%
Mid level cloud: 18%
High level cloud: 5%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

14 / 20 mph 27 / 16°F 64% 1013 mb
Low level cloud: 6%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 29
Nov
01:00

W
W

14 / 20 mph 26 / 15°F 66% 1016 mb
Low level cloud: 18%
Mid level cloud: 12%
High level cloud: 6%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

13 / 19 mph 26 / 15°F 66% 1019 mb
Low level cloud: 19%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WNW
WNW

12 / 18 mph 26 / 15°F 66% 1023 mb
Low level cloud: 6%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WNW
WNW

13 / 15 mph 32 / 22°F 48% 1026 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

13 / 15 mph 35 / 26°F 41% 1027 mb
Low level cloud: 1%
Mid level cloud: 1%
High level cloud: 2%
Most Significant Cloud Type: low
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

8 / 12 mph 32 / 24°F 48% 1030 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 8%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

3 / 6 mph 27 / 23°F 63% 1032 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 18%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

3 / 5 mph 26 / 24°F 65% 1032 mb
Low level cloud: 0%
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
Sun 30
Nov
01:00

S
S

2 / 3 mph 29 / 27°F 66% 1031 mb
Low level cloud: 0%
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
04:00

SE
SE

3 / 5 mph 29 / 26°F 68% 1031 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 73%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SE
SE

5 / 8 mph 29 / 24°F 64% 1029 mb
Low level cloud: 95%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSE
SSE

10 / 12 mph 34 / 26°F 75% 1025 mb
Low level cloud: 99%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

13 / 16 mph 39 / 31°F 90% 1019 mb
Low level cloud: 99%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

11 / 17 mph 38 / 30°F 98% 1017 mb
Low level cloud: 99%
Mid level cloud: 55%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

SW
SW

13 / 19 mph 40 / 32°F 97% 1014 mb
Low level cloud: 99%
Mid level cloud: 18%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

WSW
WSW

14 / 22 mph 35 / 26°F 92% 1015 mb
Low level cloud: 91%
Mid level cloud: 6%
High level cloud: 8%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 01
Dec
01:00

W
W

16 / 24 mph 31 / 20°F 83% 1016 mb
Low level cloud: 13%
Mid level cloud: 0%
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

W
W

13 / 21 mph 28 / 17°F 85% 1019 mb
Low level cloud: 16%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

W
W

11 / 17 mph 27 / 17°F 85% 1021 mb
Low level cloud: 81%
Mid level cloud: 1%
High level cloud: 21%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

W
W

11 / 13 mph 32 / 22°F 71% 1024 mb
Low level cloud: 77%
Mid level cloud: 5%
High level cloud: 17%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

12 / 13 mph 31 / 22°F 61% 1024 mb
Low level cloud: 56%
Mid level cloud: 35%
High level cloud: 50%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

9 / 14 mph 27 / 18°F 64% 1026 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 33%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WNW
WNW

6 / 10 mph 24 / 16°F 69% 1028 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 8%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NW
NW

3 / 5 mph 23 / 19°F 70% 1029 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 68%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 02
Dec
01:00

N
N

2 / 2 mph 24 / 24°F 62% 1029 mb
Low level cloud: 0%
Mid level cloud: 96%
High level cloud: 100%
Most Significant Cloud Type: medium
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

2 / 3 mph 23 / 20°F 62% 1029 mb
Low level cloud: 0%
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
07:00

E
E

5 / 6 mph 23 / 17°F 68% 1028 mb
Low level cloud: 0%
Mid level cloud: 98%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

5 / 6 mph 25 / 19°F 73% 1027 mb
Low level cloud: 24%
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
13:00

NE
NE

8 / 9 mph 27 / 19°F 88% 1021 mb
Low level cloud: 70%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

NE
NE

10 / 12 mph 27 / 18°F 96% 1017 mb
Low level cloud: 74%
Mid level cloud: 73%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
19:00

NE
NE

13 / 15 mph 26 / 15°F 95% 1011 mb
Low level cloud: 76%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
22:00

NNE
NNE

11 / 13 mph 25 / 14°F 95% 1011 mb
Low level cloud: 69%
Mid level cloud: 47%
High level cloud: 34%
Most Significant Cloud Type: low
89%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Wed 03
Dec
01:00

N
N

7 / 10 mph 23 / 14°F 94% 1011 mb
Low level cloud: 65%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NW
NW

3 / 7 mph 14 / 8°F 99% 1013 mb
Low level cloud: 13%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WNW
WNW

3 / 6 mph 13 / 7°F 98% 1015 mb
Low level cloud: 4%
Mid level cloud: 84%
High level cloud: 0%
Most Significant Cloud Type: medium
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

W
W

5 / 6 mph 29 / 24°F 82% 1016 mb
Low level cloud: 15%
Mid level cloud: 46%
High level cloud: 20%
Most Significant Cloud Type: medium
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

6 / 8 mph 32 / 26°F 86% 1016 mb
Low level cloud: 75%
Mid level cloud: 46%
High level cloud: 8%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

5 / 8 mph 30 / 25°F 90% 1018 mb
Low level cloud: 81%
Mid level cloud: 12%
High level cloud: 20%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

4 / 9 mph 23 / 18°F 96% 1022 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
22:00

WSW
WSW

2 / 5 mph 16 / 13°F 97% 1023 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 19%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 04
Dec
01:00

WNW
WNW

9 / 11 mph 20 / 10°F 51% 1031 mb
Low level cloud: 0%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: medium
82%
0.0 In
07:00

WNW
WNW

17 / 23 mph 20 / 5°F 75% 1022 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 13%
Most Significant Cloud Type: medium
25%
0.0 In
13:00

SW
SW

8 / 9 mph 30 / 22°F 85% 1020 mb
Low level cloud: 11%
Mid level cloud: 9%
High level cloud: 94%
Most Significant Cloud Type: medium
42%
0.0 In
19:00

SW
SW

6 / 8 mph 31 / 25°F 96% 1015 mb
Low level cloud: 14%
Mid level cloud: 21%
High level cloud: 100%
Most Significant Cloud Type: low
32%
0.0 In
Fri 05
Dec
01:00

WSW
WSW

11 / 23 mph 26 / 16°F 94% 1013 mb
Low level cloud: 49%
Mid level cloud: 3%
High level cloud: 31%
Most Significant Cloud Type: low
54%
0.0 In
07:00

WNW
WNW

3 / 6 mph 4 / -2°F 98% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
13:00

NW
NW

10 / 12 mph 18 / 6°F 80% 1026 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
1%
0.0 In
19:00

WSW
WSW

2 / 4 mph 12 / 11°F 96% 1026 mb
Low level cloud: 0%
Mid level cloud: 64%
High level cloud: 14%
Most Significant Cloud Type: medium
64%
0.0 In
Sat 06
Dec
01:00

NE
NE

1 / 1 mph 5 / 5°F 93% 1028 mb
Low level cloud: 0%
Mid level cloud: 96%
High level cloud: 100%
Most Significant Cloud Type: medium
99%
0.0 In
07:00

SE
SE

4 / 5 mph 19 / 13°F 94% 1020 mb
Low level cloud: 97%
Mid level cloud: 44%
High level cloud: 15%
Most Significant Cloud Type: low
100%
0.0 In
13:00

ENE
ENE

6 / 7 mph 23 / 16°F 96% 1016 mb
Low level cloud: 78%
Mid level cloud: 83%
High level cloud: 7%
Most Significant Cloud Type: low
100%
0.2 In
19:00

NNE
NNE

10 / 18 mph 26 / 16°F 97% 998 mb
Low level cloud: 98%
Mid level cloud: 79%
High level cloud: 89%
Most Significant Cloud Type: low
100%
0.9 In
Sun 07
Dec
01:00

WNW
WNW

5 / 10 mph 16 / 8°F 99% 1008 mb
Low level cloud: 11%
Mid level cloud: 6%
High level cloud: 19%
Most Significant Cloud Type: low
15%
0.2 In
07:00

NW
NW

10 / 19 mph 24 / 13°F 90% 1011 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.5 In
13:00

W
W

13 / 17 mph 30 / 20°F 89% 1008 mb
Low level cloud: 35%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
41%
0.0 In
19:00

SSW
SSW

5 / 9 mph 27 / 21°F 99% 1019 mb
Low level cloud: 48%
Mid level cloud: 91%
High level cloud: 100%
Most Significant Cloud Type: low
91%
0.0 In
Mon 08
Dec
01:00

W
W

4 / 9 mph 1 / -8°F 97% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 14%
Most Significant Cloud Type: high
14%
0.0 In
07:00

SSW
SSW

11 / 23 mph 32 / 23°F 100% 1006 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
13:00

WSW
WSW

5 / 6 mph 22 / 16°F 79% 1023 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
0.0 In
19:00

WSW
WSW

10 / 19 mph 34 / 27°F 100% 999 mb
Low level cloud: 94%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
93%
0.3 In
Tue 09
Dec
01:00

SSW
SSW

8 / 13 mph 30 / 22°F 94% 1018 mb
Low level cloud: 97%
Mid level cloud: 91%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
07:00

W
W

7 / 15 mph 28 / 21°F 91% 1001 mb
Low level cloud: 1%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
13:00

SW
SW

8 / 16 mph 36 / 30°F 100% 1006 mb
Low level cloud: 100%
Mid level cloud: 47%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
19:00

NW
NW

7 / 9 mph 32 / 25°F 92% 1001 mb
Low level cloud: 10%
Mid level cloud: 44%
High level cloud: 10%
Most Significant Cloud Type: medium
71%
0.0 In
Wed 10
Dec
01:00

WNW
WNW

6 / 14 mph 31 / 25°F 100% 1006 mb
Low level cloud: 91%
Mid level cloud: 0%
High level cloud: 38%
Most Significant Cloud Type: low
95%
0.0 In
07:00

NW
NW

10 / 15 mph 14 / 1°F 84% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

W
W

6 / 9 mph 35 / 30°F 100% 1008 mb
Low level cloud: 63%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
19:00

W
W

3 / 3 mph 25 / 22°F 95% 1023 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 33%
Most Significant Cloud Type: medium
24%
0.0 In
Thu 11
Dec
01:00

W
W

14 / 29 mph 31 / 20°F 93% 1006 mb
Low level cloud: 100%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
07:00

SW
SW

6 / 9 mph 22 / 15°F 87% 1019 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 100%
Most Significant Cloud Type: medium
14%
0.0 In
13:00

WNW
WNW

12 / 15 mph 36 / 28°F 90% 1014 mb
Low level cloud: 35%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: low
39%
0.0 In
19:00

SSW
SSW

9 / 16 mph 32 / 24°F 86% 1013 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
0.0 In
Fri 12
Dec
01:00

NW
NW

5 / 9 mph 24 / 18°F 94% 1023 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 32%
Most Significant Cloud Type: medium
29%
0.0 In
07:00

WNW
WNW

9 / 18 mph 26 / 17°F 94% 1003 mb
Low level cloud: 7%
Mid level cloud: 15%
High level cloud: 62%
Most Significant Cloud Type: medium
36%
0.0 In
13:00

SSE
SSE

3 / 4 mph 39 / 37°F 84% 1026 mb
Low level cloud: 2%
Mid level cloud: 3%
High level cloud: 96%
Most Significant Cloud Type: medium
12%
0.0 In
19:00

WNW
WNW

16 / 24 mph 20 / 5°F 82% 1016 mb
Low level cloud: 33%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
33%
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