WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Rosehill 14 Day Long Range Forecast

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

Lancashire, United Kingdom

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

Over the next 14 days the Rosehill forecast suggests the average daytime maximum temperature will be around 7°C, with a high for the two weeks of 9°C expected on the afternoon of Thursday 18th. The average minimum temperature will be 4°C, dipping to its lowest on the morning of Thursday 25th at 0°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. Current predictions suggest Thursday 18th will have the most precipitation with an accumulation of around 27.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Tue 16
Dec
18:00

SW
SW

2 / 3 mph 44 / 44°F 92% 1014 mb
Low level cloud: 10%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

4 / 7 mph 41 / 38°F 93% 1014 mb
Low level cloud: 37%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 17
Dec
00:00

SSE
SSE

6 / 11 mph 37 / 33°F 95% 1015 mb
Low level cloud: 20%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

6 / 12 mph 36 / 31°F 94% 1013 mb
Low level cloud: 13%
Mid level cloud: 24%
High level cloud: 92%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

12 / 20 mph 37 / 30°F 85% 1011 mb
Low level cloud: 6%
Mid level cloud: 94%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

15 / 23 mph 40 / 31°F 90% 1010 mb
Low level cloud: 94%
Mid level cloud: 96%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

17 / 25 mph 42 / 34°F 92% 1008 mb
Low level cloud: 100%
Mid level cloud: 66%
High level cloud: 96%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

S
S

16 / 24 mph 45 / 38°F 92% 1006 mb
Low level cloud: 100%
Mid level cloud: 57%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

S
S

18 / 26 mph 46 / 38°F 95% 1004 mb
Low level cloud: 100%
Mid level cloud: 96%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

S
S

17 / 25 mph 47 / 41°F 95% 1002 mb
Low level cloud: 100%
Mid level cloud: 98%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
Thu 18
Dec
00:00

SW
SW

10 / 21 mph 43 / 38°F 92% 1002 mb
Low level cloud: 81%
Mid level cloud: 73%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
03:00

SSW
SSW

10 / 22 mph 42 / 36°F 93% 1003 mb
Low level cloud: 42%
Mid level cloud: 13%
High level cloud: 100%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

7 / 15 mph 41 / 36°F 92% 1005 mb
Low level cloud: 59%
Mid level cloud: 43%
High level cloud: 91%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

8 / 14 mph 44 / 39°F 93% 1005 mb
Low level cloud: 44%
Mid level cloud: 97%
High level cloud: 100%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

11 / 14 mph 47 / 42°F 91% 1001 mb
Low level cloud: 93%
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
15:00

NNE
NNE

4 / 4 mph 48 / 47°F 97% 992 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.5 In of precipitation over the past 3 hours.
0.5 In
18:00

SSW
SSW

13 / 18 mph 47 / 41°F 87% 993 mb
Low level cloud: 97%
Mid level cloud: 64%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
21:00

WSW
WSW

20 / 26 mph 44 / 36°F 80% 999 mb
Low level cloud: 65%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 19
Dec
00:00

SW
SW

14 / 22 mph 43 / 35°F 78% 1003 mb
Low level cloud: 51%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

17 / 34 mph 41 / 32°F 82% 1004 mb
Low level cloud: 100%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

19 / 41 mph 40 / 30°F 78% 1006 mb
Low level cloud: 82%
Mid level cloud: 78%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

19 / 31 mph 43 / 35°F 81% 1009 mb
Low level cloud: 88%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

19 / 24 mph 46 / 39°F 72% 1010 mb
Low level cloud: 7%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

18 / 23 mph 48 / 41°F 78% 1010 mb
Low level cloud: 39%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

11 / 13 mph 47 / 41°F 81% 1011 mb
Low level cloud: 95%
Mid level cloud: 30%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

12 / 18 mph 44 / 38°F 84% 1011 mb
Low level cloud: 68%
Mid level cloud: 46%
High level cloud: 22%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 20
Dec
00:00

SSE
SSE

8 / 11 mph 41 / 36°F 92% 1010 mb
Low level cloud: 23%
Mid level cloud: 18%
High level cloud: 100%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

9 / 14 mph 40 / 34°F 92% 1008 mb
Low level cloud: 52%
Mid level cloud: 17%
High level cloud: 90%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

9 / 16 mph 39 / 33°F 93% 1007 mb
Low level cloud: 71%
Mid level cloud: 20%
High level cloud: 82%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

13 / 19 mph 41 / 34°F 91% 1006 mb
Low level cloud: 88%
Mid level cloud: 41%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

15 / 23 mph 44 / 37°F 84% 1004 mb
Low level cloud: 75%
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
15:00

SSE
SSE

17 / 24 mph 45 / 38°F 83% 1001 mb
Low level cloud: 95%
Mid level cloud: 83%
High level cloud: 18%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

16 / 26 mph 44 / 37°F 83% 1001 mb
Low level cloud: 92%
Mid level cloud: 50%
High level cloud: 82%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

17 / 30 mph 42 / 34°F 82% 1001 mb
Low level cloud: 88%
Mid level cloud: 86%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 21
Dec
00:00

ESE
ESE

17 / 28 mph 43 / 36°F 80% 1000 mb
Low level cloud: 79%
Mid level cloud: 84%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

17 / 24 mph 43 / 35°F 87% 1001 mb
Low level cloud: 97%
Mid level cloud: 70%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

18 / 28 mph 43 / 34°F 88% 1002 mb
Low level cloud: 92%
Mid level cloud: 52%
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

ESE
ESE

14 / 21 mph 44 / 37°F 89% 1004 mb
Low level cloud: 91%
Mid level cloud: 44%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

10 / 14 mph 45 / 39°F 88% 1006 mb
Low level cloud: 80%
Mid level cloud: 83%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

10 / 13 mph 45 / 40°F 92% 1008 mb
Low level cloud: 54%
Mid level cloud: 72%
High level cloud: 100%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

11 / 15 mph 45 / 39°F 91% 1010 mb
Low level cloud: 13%
Mid level cloud: 40%
High level cloud: 100%
Most Significant Cloud Type: medium
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

7 / 10 mph 44 / 40°F 94% 1011 mb
Low level cloud: 82%
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
Mon 22
Dec
00:00

E
E

11 / 16 mph 45 / 40°F 95% 1011 mb
Low level cloud: 72%
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
03:00

ENE
ENE

17 / 28 mph 44 / 37°F 92% 1010 mb
Low level cloud: 94%
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
06:00

ENE
ENE

23 / 39 mph 44 / 35°F 90% 1008 mb
Low level cloud: 81%
Mid level cloud: 98%
High level cloud: 94%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

20 / 35 mph 45 / 37°F 90% 1009 mb
Low level cloud: 77%
Mid level cloud: 51%
High level cloud: 57%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

E
E

19 / 27 mph 47 / 40°F 94% 1010 mb
Low level cloud: 88%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

16 / 21 mph 48 / 41°F 87% 1010 mb
Low level cloud: 88%
Mid level cloud: 1%
High level cloud: 16%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

18 / 23 mph 47 / 40°F 92% 1011 mb
Low level cloud: 89%
Mid level cloud: 17%
High level cloud: 2%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

17 / 24 mph 46 / 39°F 91% 1012 mb
Low level cloud: 85%
Mid level cloud: 30%
High level cloud: 100%
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
Tue 23
Dec
00:00

E
E

8 / 13 mph 41 / 36°F 92% 1016 mb
Low level cloud: 36%
Mid level cloud: 18%
High level cloud: 91%
Most Significant Cloud Type: low
53%
0.0 In
06:00

ENE
ENE

17 / 35 mph 40 / 31°F 81% 1021 mb
Low level cloud: 96%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
96%
0.0 In
12:00

SE
SE

2 / 3 mph 43 / 44°F 85% 1020 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 100%
Most Significant Cloud Type: medium
27%
0.0 In
18:00

NNE
NNE

4 / 6 mph 49 / 48°F 88% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
6%
0.0 In
Wed 24
Dec
00:00

ENE
ENE

15 / 30 mph 39 / 30°F 77% 1027 mb
Low level cloud: 93%
Mid level cloud: 4%
High level cloud: 9%
Most Significant Cloud Type: low
95%
0.0 In
06:00

NE
NE

7 / 12 mph 39 / 35°F 85% 1030 mb
Low level cloud: 26%
Mid level cloud: 46%
High level cloud: 18%
Most Significant Cloud Type: low
44%
0.0 In
12:00

ENE
ENE

17 / 27 mph 44 / 36°F 82% 1026 mb
Low level cloud: 99%
Mid level cloud: 5%
High level cloud: 10%
Most Significant Cloud Type: low
100%
0.0 In
18:00

ENE
ENE

14 / 22 mph 41 / 33°F 77% 1024 mb
Low level cloud: 16%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
Thu 25
Dec
00:00

NNE
NNE

6 / 10 mph 39 / 34°F 82% 1026 mb
Low level cloud: 2%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
0.0 In
06:00

NE
NE

6 / 9 mph 35 / 30°F 84% 1025 mb
Low level cloud: 1%
Mid level cloud: 21%
High level cloud: 98%
Most Significant Cloud Type: medium
28%
0.0 In
12:00

ENE
ENE

12 / 19 mph 39 / 32°F 81% 1029 mb
Low level cloud: 2%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
18:00

ENE
ENE

6 / 9 mph 40 / 36°F 89% 1028 mb
Low level cloud: 25%
Mid level cloud: 31%
High level cloud: 18%
Most Significant Cloud Type: low
37%
0.0 In
Fri 26
Dec
00:00

ENE
ENE

15 / 29 mph 38 / 29°F 86% 1032 mb
Low level cloud: 100%
Mid level cloud: 8%
High level cloud: 75%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NE
NE

4 / 7 mph 34 / 30°F 80% 1029 mb
Low level cloud: 81%
Mid level cloud: 13%
High level cloud: 100%
Most Significant Cloud Type: low
97%
0.0 In
12:00

ENE
ENE

16 / 26 mph 41 / 32°F 81% 1033 mb
Low level cloud: 100%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NNE
NNE

4 / 7 mph 40 / 37°F 92% 1028 mb
Low level cloud: 83%
Mid level cloud: 44%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.0 In
Sat 27
Dec
00:00

ENE
ENE

14 / 23 mph 40 / 32°F 84% 1033 mb
Low level cloud: 100%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NE
NE

3 / 5 mph 39 / 37°F 95% 1027 mb
Low level cloud: 97%
Mid level cloud: 93%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.1 In
12:00

ENE
ENE

12 / 20 mph 42 / 35°F 69% 1032 mb
Low level cloud: 82%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
82%
0.0 In
18:00

NNE
NNE

1 / 2 mph 43 / 43°F 83% 1027 mb
Low level cloud: 75%
Mid level cloud: 46%
High level cloud: 7%
Most Significant Cloud Type: low
91%
0.0 In
Sun 28
Dec
00:00

NNE
NNE

18 / 30 mph 42 / 34°F 67% 1029 mb
Low level cloud: 86%
Mid level cloud: 3%
High level cloud: 3%
Most Significant Cloud Type: low
87%
0.0 In
06:00

NNW
NNW

2 / 4 mph 36 / 36°F 79% 1028 mb
Low level cloud: 95%
Mid level cloud: 15%
High level cloud: 87%
Most Significant Cloud Type: low
100%
0.0 In
12:00

ENE
ENE

18 / 30 mph 41 / 33°F 73% 1033 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
4%
0.0 In
18:00

NE
NE

3 / 5 mph 47 / 46°F 82% 1029 mb
Low level cloud: 1%
Mid level cloud: 19%
High level cloud: 7%
Most Significant Cloud Type: medium
23%
0.0 In
Mon 29
Dec
00:00

NE
NE

5 / 8 mph 40 / 37°F 84% 1036 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
06:00

N
N

4 / 6 mph 36 / 33°F 89% 1031 mb
Low level cloud: 6%
Mid level cloud: 23%
High level cloud: 2%
Most Significant Cloud Type: medium
39%
0.0 In
12:00

NNW
NNW

2 / 4 mph 43 / 42°F 73% 1035 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
18:00

NE
NE

5 / 7 mph 41 / 38°F 94% 1030 mb
Low level cloud: 18%
Mid level cloud: 44%
High level cloud: 17%
Most Significant Cloud Type: low
35%
0.0 In
Tue 30
Dec
00:00

N
N

4 / 7 mph 39 / 36°F 85% 1035 mb
Low level cloud: 1%
Mid level cloud: 20%
High level cloud: 21%
Most Significant Cloud Type: medium
23%
0.0 In
06:00

NNE
NNE

5 / 9 mph 35 / 30°F 89% 1030 mb
Low level cloud: 89%
Mid level cloud: 45%
High level cloud: 4%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NW
NW

2 / 4 mph 43 / 42°F 73% 1035 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 17%
Most Significant Cloud Type: medium
5%
0.0 In
18:00

NNE
NNE

5 / 8 mph 40 / 36°F 82% 1031 mb
Low level cloud: 100%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
99%
0.0 In
Wed 31
Dec
00:00

WNW
WNW

2 / 3 mph 40 / 40°F 81% 1033 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: medium
10%
0.0 In
06:00

NNW
NNW

4 / 7 mph 35 / 31°F 87% 1028 mb
Low level cloud: 100%
Mid level cloud: 0%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.0 In
12:00

WNW
WNW

2 / 4 mph 40 / 39°F 84% 1028 mb
Low level cloud: 60%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
76%
0.0 In
18:00

NW
NW

5 / 8 mph 40 / 36°F 84% 1023 mb
Low level cloud: 47%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
62%
0.0 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