Fast Forecast

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

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:

Over the next 14 days the Jaffrey 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 Friday 17th. The mean minimum temperature will be 8°C, dipping to its lowest on the morning of Wednesday 22nd at 6°C. The next 14 days will have some days seeing a little precipitation and some days with rain. Predictions are Monday 20th 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
Tue 14
May		01:00

SSW
SSW

 6 / 11 mph 49 / 46°F 96% 1016 mb
Low level cloud: 13%
Mid level cloud: 45%
High level cloud: 3%
Most Significant Cloud Type: medium
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

 6 / 11 mph 50 / 48°F 94% 1016 mb
Low level cloud: 35%
Mid level cloud: 99%
High level cloud: 2%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

 8 / 10 mph 58 / 56°F 80% 1015 mb
Low level cloud: 11%
Mid level cloud: 44%
High level cloud: 5%
Most Significant Cloud Type: medium
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 11 / 13 mph 71 / 69°F 53% 1015 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 32%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

 11 / 12 mph 76 / 77°F 46% 1013 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 7%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 9 / 15 mph 72 / 76°F 55% 1011 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SW
SW

 11 / 20 mph 65 / 64°F 72% 1012 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SW
SW

 9 / 16 mph 57 / 56°F 85% 1013 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 1%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 15
May		19:00

ENE
ENE

 1 / 2 mph 58 / 55°F 97% 1012 mb
Low level cloud: 30%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

 2 / 4 mph 53 / 54°F 97% 1012 mb
Low level cloud: 40%
Mid level cloud: 43%
High level cloud: 50%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 16
May		01:00

NE
NE

 3 / 5 mph 54 / 54°F 99% 1011 mb
Low level cloud: 80%
Mid level cloud: 56%
High level cloud: 9%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

 4 / 6 mph 54 / 53°F 99% 1011 mb
Low level cloud: 90%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ENE
ENE

 6 / 7 mph 56 / 55°F 96% 1012 mb
Low level cloud: 94%
Mid level cloud: 26%
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

E
E

 11 / 13 mph 63 / 63°F 72% 1012 mb
Low level cloud: 80%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

E
E

 8 / 9 mph 60 / 58°F 83% 1012 mb
Low level cloud: 44%
Mid level cloud: 68%
High level cloud: 2%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

E
E

 5 / 7 mph 59 / 57°F 84% 1013 mb
Low level cloud: 7%
Mid level cloud: 48%
High level cloud: 10%
Most Significant Cloud Type: medium
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ENE
ENE

 3 / 5 mph 58 / 56°F 86% 1014 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

 4 / 7 mph 51 / 50°F 96% 1015 mb
Low level cloud: 4%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 17
May		01:00

NNE
NNE

 4 / 8 mph 48 / 47°F 97% 1016 mb
Low level cloud: 9%
Mid level cloud: 18%
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

N
N

 4 / 8 mph 47 / 46°F 97% 1016 mb
Low level cloud: 4%
Mid level cloud: 15%
High level cloud: 5%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 4 / 4 mph 59 / 58°F 77% 1017 mb
Low level cloud: 4%
Mid level cloud: 12%
High level cloud: 59%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

 6 / 7 mph 69 / 66°F 56% 1017 mb
Low level cloud: 2%
Mid level cloud: 44%
High level cloud: 37%
Most Significant Cloud Type: medium
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ESE
ESE

 8 / 9 mph 73 / 76°F 50% 1016 mb
Low level cloud: 20%
Mid level cloud: 44%
High level cloud: 51%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ESE
ESE

 8 / 9 mph 71 / 68°F 57% 1016 mb
Low level cloud: 25%
Mid level cloud: 28%
High level cloud: 8%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ESE
ESE

 6 / 10 mph 59 / 57°F 87% 1017 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 3%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

 3 / 6 mph 51 / 50°F 98% 1018 mb
Low level cloud: 17%
Mid level cloud: 21%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May		01:00

ENE
ENE

 2 / 4 mph 49 / 49°F 98% 1018 mb
Low level cloud: 27%
Mid level cloud: 24%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ESE
ESE

 2 / 4 mph 47 / 47°F 98% 1019 mb
Low level cloud: 30%
Mid level cloud: 32%
High level cloud: 59%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

E
E

 3 / 4 mph 56 / 55°F 80% 1019 mb
Low level cloud: 11%
Mid level cloud: 45%
High level cloud: 19%
Most Significant Cloud Type: medium
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ESE
ESE

 6 / 7 mph 67 / 64°F 54% 1018 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 100%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SE
SE

 7 / 8 mph 72 / 69°F 46% 1017 mb
Low level cloud: 2%
Mid level cloud: 28%
High level cloud: 100%
Most Significant Cloud Type: medium
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SE
SE

 7 / 8 mph 69 / 67°F 52% 1016 mb
Low level cloud: 14%
Mid level cloud: 20%
High level cloud: 100%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ESE
ESE

 6 / 9 mph 58 / 56°F 80% 1016 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 34%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

 4 / 7 mph 48 / 46°F 99% 1017 mb
Low level cloud: 67%
Mid level cloud: 14%
High level cloud: 14%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May		01:00

ENE
ENE

 4 / 6 mph 47 / 45°F 96% 1016 mb
Low level cloud: 96%
Mid level cloud: 31%
High level cloud: 3%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

 4 / 5 mph 46 / 45°F 96% 1016 mb
Low level cloud: 94%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ENE
ENE

 7 / 9 mph 48 / 45°F 92% 1016 mb
Low level cloud: 99%
Mid level cloud: 43%
High level cloud: 45%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

 7 / 9 mph 52 / 49°F 82% 1016 mb
Low level cloud: 97%
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
13:00

ESE
ESE

 8 / 9 mph 62 / 59°F 64% 1013 mb
Low level cloud: 37%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ESE
ESE

 9 / 10 mph 57 / 55°F 72% 1013 mb
Low level cloud: 59%
Mid level cloud: 91%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

E
E

 7 / 9 mph 51 / 48°F 88% 1013 mb
Low level cloud: 94%
Mid level cloud: 71%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

 6 / 8 mph 47 / 44°F 98% 1014 mb
Low level cloud: 100%
Mid level cloud: 94%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May		01:00

ENE
ENE

 7 / 9 mph 46 / 43°F 99% 1013 mb
Low level cloud: 99%
Mid level cloud: 91%
High level cloud: 49%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

 8 / 11 mph 45 / 41°F 99% 1013 mb
Low level cloud: 96%
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
07:00

ENE
ENE

 9 / 13 mph 45 / 40°F 98% 1014 mb
Low level cloud: 95%
Mid level cloud: 73%
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

ENE
ENE

 10 / 12 mph 47 / 43°F 98% 1014 mb
Low level cloud: 98%
Mid level cloud: 88%
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

ENE
ENE

 10 / 11 mph 49 / 45°F 98% 1014 mb
Low level cloud: 96%
Mid level cloud: 95%
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

ENE
ENE

 9 / 10 mph 50 / 46°F 99% 1014 mb
Low level cloud: 98%
Mid level cloud: 82%
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

ENE
ENE

 8 / 9 mph 49 / 45°F 99% 1015 mb
Low level cloud: 98%
Mid level cloud: 91%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

NE
NE

 7 / 8 mph 47 / 44°F 99% 1015 mb
Low level cloud: 100%
Mid level cloud: 96%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 21
May		01:00

WNW
WNW

 4 / 9 mph 45 / 42°F 75% 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

ENE
ENE

 4 / 8 mph 48 / 47°F 90% 1005 mb
Low level cloud: 20%
Mid level cloud: 87%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
19:00

WSW
WSW

 5 / 7 mph 61 / 61°F 97% 1007 mb
Low level cloud: 17%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Wed 22
May		01:00

S
S

 2 / 3 mph 62 / 62°F 71% 1006 mb
Low level cloud: 0%
Mid level cloud: 65%
High level cloud: 4%
Most Significant Cloud Type: medium
65%
0.0 In
07:00

NE
NE

 4 / 5 mph 59 / 59°F 89% 1016 mb
Low level cloud: 92%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
95%
0.0 In
13:00

SW
SW

 8 / 12 mph 79 / 79°F 42% 1009 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
0.0 In
19:00

ESE
ESE

 5 / 8 mph 52 / 51°F 74% 1025 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
Thu 23
May		01:00

NNW
NNW

 1 / 2 mph 46 / 46°F 97% 1013 mb
Low level cloud: 39%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
07:00

NE
NE

 1 / 1 mph 58 / 58°F 53% 1027 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
13:00

SSE
SSE

 3 / 4 mph 55 / 55°F 91% 1010 mb
Low level cloud: 82%
Mid level cloud: 56%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
19:00

SE
SE

 6 / 11 mph 56 / 55°F 69% 1022 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
Fri 24
May		01:00

SW
SW

 3 / 4 mph 54 / 54°F 99% 1008 mb
Low level cloud: 98%
Mid level cloud: 96%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
07:00

SW
SW

 2 / 3 mph 61 / 61°F 63% 1022 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
13:00

NNE
NNE

 4 / 6 mph 56 / 56°F 96% 1010 mb
Low level cloud: 84%
Mid level cloud: 61%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
19:00

ESE
ESE

 7 / 14 mph 54 / 52°F 57% 1019 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 1%
Most Significant Cloud Type: medium
1%
0.0 In
Sat 25
May		01:00

WSW
WSW

 2 / 4 mph 52 / 53°F 96% 1011 mb
Low level cloud: 29%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
38%
0.0 In
07:00

SSE
SSE

 3 / 4 mph 57 / 58°F 50% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 20%
Most Significant Cloud Type: high
19%
0.0 In
13:00

S
S

 5 / 7 mph 72 / 76°F 53% 1010 mb
Low level cloud: 6%
Mid level cloud: 88%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
19:00

WSW
WSW

 4 / 6 mph 54 / 53°F 64% 1017 mb
Low level cloud: 0%
Mid level cloud: 70%
High level cloud: 89%
Most Significant Cloud Type: medium
73%
0.0 In
Sun 26
May		01:00

SSW
SSW

 5 / 9 mph 56 / 55°F 97% 1011 mb
Low level cloud: 26%
Mid level cloud: 44%
High level cloud: 5%
Most Significant Cloud Type: low
41%
0.1 In
07:00

SSW
SSW

 3 / 4 mph 55 / 55°F 70% 1017 mb
Low level cloud: 72%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: low
88%
0.0 In
13:00

WSW
WSW

 9 / 15 mph 76 / 78°F 46% 1011 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 11%
Most Significant Cloud Type: medium
46%
0.0 In
19:00

SE
SE

 4 / 5 mph 61 / 61°F 89% 1015 mb
Low level cloud: 90%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
97%
0.0 In
Mon 27
May		01:00

WNW
WNW

 2 / 4 mph 58 / 58°F 78% 1013 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 95%
Most Significant Cloud Type: medium
47%
0.0 In
07:00

SSE
SSE

 3 / 4 mph 61 / 61°F 87% 1016 mb
Low level cloud: 86%
Mid level cloud: 45%
High level cloud: 67%
Most Significant Cloud Type: low
100%
0.0 In
13:00

SSE
SSE

 8 / 13 mph 72 / 76°F 60% 1011 mb
Low level cloud: 89%
Mid level cloud: 49%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
19:00

ENE
ENE

 3 / 5 mph 61 / 61°F 99% 1016 mb
Low level cloud: 94%
Mid level cloud: 33%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.6 In
Tue 28
May		01:00

W
W

 10 / 20 mph 60 / 60°F 98% 1012 mb
Low level cloud: 73%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
75%
0.2 In
07:00

N
N

 3 / 4 mph 56 / 57°F 99% 1016 mb
Low level cloud: 100%
Mid level cloud: 83%
High level cloud: 1%
Most Significant Cloud Type: low
100%
0.1 In
13:00

NW
NW

 9 / 18 mph 76 / 77°F 39% 1013 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
0.0 In
19:00

ENE
ENE

 3 / 6 mph 59 / 59°F 95% 1016 mb
Low level cloud: 85%
Mid level cloud: 21%
High level cloud: 11%
Most Significant Cloud Type: low
93%
0.0 In
Wed 29
May		01:00

ENE
ENE

 3 / 6 mph 61 / 61°F 84% 1013 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 58%
Most Significant Cloud Type: medium
12%
0.0 In
07:00

ESE
ESE

 3 / 6 mph 55 / 55°F 98% 1014 mb
Low level cloud: 98%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
13:00

E
E

 6 / 11 mph 60 / 60°F 96% 1012 mb
Low level cloud: 84%
Mid level cloud: 64%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.1 In
19:00

ESE
ESE

 8 / 13 mph 57 / 55°F 99% 1011 mb
Low level cloud: 99%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In

The day label given represents the local day relative to the local time for the location you are looking at.
(More Info)

Day

This time is corrected for local time zones and where possible for daylight saving times.
(More Info)

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.
(More Info)

Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
(More Info)

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.
(More Info)

Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
(More Info)

Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
(More Info)

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.
(More Info)

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.
(More Info)

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.
(More Info)

Pressure