WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Rothwell Haigh 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Rothwell Haigh

Kirklees, United Kingdom

Long range weather outlook for Rothwell Haigh includes 14 day forecast summary:

The forecast for Rothwell Haigh in the coming two weeks is predicting the average daytime maximum temperature will be around 20°C, with a high for the two weeks of 23°C expected on the afternoon of Saturday 25th. The average minimum temperature will be 11°C, dipping to its lowest on the morning of Monday 20th at 8°C. Expect the following 14 days ahead to have mixed overhead conditions with some days dry and some seeing a significant amount of rain. Predictions are Wednesday 22nd will have the most precipitation with an accumulation of around 6.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityCloud AmountPrecip AmountWeather
Fri 17
May
03:00

N
N

3 / 4 kts 53 / 52°F 95%
Low level cloud: 97%
Mid level cloud: 26%
High level cloud: 13%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

3 / 4 kts 54 / 53°F 92%
Low level cloud: 81%
Mid level cloud: 24%
High level cloud: 10%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

3 / 3 kts 58 / 58°F 81%
Low level cloud: 93%
Mid level cloud: 21%
High level cloud: 16%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

N
N

4 / 4 kts 63 / 61°F 73%
Low level cloud: 77%
Mid level cloud: 16%
High level cloud: 21%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

6 / 7 kts 65 / 63°F 72%
Low level cloud: 51%
Mid level cloud: 13%
High level cloud: 37%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

6 / 6 kts 65 / 62°F 78%
Low level cloud: 47%
Mid level cloud: 11%
High level cloud: 99%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

4 / 6 kts 57 / 56°F 91%
Low level cloud: 98%
Mid level cloud: 10%
High level cloud: 55%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May
00:00

N
N

4 / 5 kts 56 / 55°F 93%
Low level cloud: 67%
Mid level cloud: 8%
High level cloud: 4%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

5 / 6 kts 53 / 51°F 93%
Low level cloud: 100%
Mid level cloud: 10%
High level cloud: 41%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

5 / 7 kts 55 / 53°F 92%
Low level cloud: 90%
Mid level cloud: 27%
High level cloud: 6%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

7 / 8 kts 57 / 55°F 85%
Low level cloud: 99%
Mid level cloud: 61%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

7 / 8 kts 63 / 63°F 76%
Low level cloud: 97%
Mid level cloud: 32%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

8 / 10 kts 70 / 68°F 55%
Low level cloud: 1%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

7 / 9 kts 70 / 68°F 67%
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
21:00

N
N

4 / 5 kts 60 / 58°F 83%
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 3%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May
00:00

NNW
NNW

5 / 6 kts 54 / 52°F 86%
Low level cloud: 1%
Mid level cloud: 3%
High level cloud: 7%
Most Significant Cloud Type: low
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNW
NNW

5 / 7 kts 51 / 48°F 90%
Low level cloud: 17%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

6 / 7 kts 52 / 48°F 87%
Low level cloud: 34%
Mid level cloud: 2%
High level cloud: 7%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

7 / 8 kts 60 / 57°F 69%
Low level cloud: 12%
Mid level cloud: 5%
High level cloud: 7%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

7 / 8 kts 67 / 65°F 56%
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
15:00

NNE
NNE

8 / 10 kts 68 / 66°F 59%
Low level cloud: 59%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

8 / 9 kts 64 / 62°F 72%
Low level cloud: 59%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

6 / 7 kts 54 / 51°F 89%
Low level cloud: 40%
Mid level cloud: 25%
High level cloud: 2%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
00:00

N
N

5 / 6 kts 50 / 47°F 89%
Low level cloud: 36%
Mid level cloud: 30%
High level cloud: 33%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

4 / 6 kts 48 / 46°F 92%
Low level cloud: 51%
Mid level cloud: 23%
High level cloud: 17%
Most Significant Cloud Type: low
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

6 / 7 kts 51 / 47°F 83%
Low level cloud: 13%
Mid level cloud: 18%
High level cloud: 1%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

8 / 9 kts 58 / 55°F 53%
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

8 / 9 kts 63 / 62°F 39%
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

8 / 9 kts 64 / 63°F 40%
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 34%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

8 / 9 kts 59 / 56°F 57%
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 4%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

5 / 7 kts 50 / 47°F 79%
Low level cloud: 85%
Mid level cloud: 45%
High level cloud: 9%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
00:00

N
N

6 / 7 kts 50 / 47°F 80%
Low level cloud: 98%
Mid level cloud: 29%
High level cloud: 10%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

5 / 6 kts 50 / 47°F 84%
Low level cloud: 99%
Mid level cloud: 48%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

4 / 5 kts 51 / 49°F 86%
Low level cloud: 97%
Mid level cloud: 44%
High level cloud: 5%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

2 / 2 kts 57 / 57°F 77%
Low level cloud: 95%
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
12:00

ENE
ENE

2 / 2 kts 61 / 61°F 71%
Low level cloud: 95%
Mid level cloud: 24%
High level cloud: 8%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

2 / 2 kts 63 / 61°F 72%
Low level cloud: 63%
Mid level cloud: 19%
High level cloud: 72%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

1 / 2 kts 65 / 61°F 75%
Low level cloud: 40%
Mid level cloud: 39%
High level cloud: 36%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

1 / 3 kts 58 / 58°F 92%
Low level cloud: 33%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May
00:00

ENE
ENE

0 / 1 kts 54 / 54°F 97%
Low level cloud: 42%
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

NNE
NNE

0 / 1 kts 53 / 53°F 99%
Low level cloud: 91%
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
06:00

WNW
WNW

2 / 3 kts 54 / 55°F 98%
Low level cloud: 92%
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
09:00

WNW
WNW

4 / 5 kts 54 / 53°F 93%
Low level cloud: 52%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
99%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

WNW
WNW

6 / 7 kts 65 / 62°F 65%
Low level cloud: 33%
Mid level cloud: 30%
High level cloud: 37%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

8 / 10 kts 65 / 64°F 59%
Low level cloud: 67%
Mid level cloud: 38%
High level cloud: 89%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

6 / 7 kts 61 / 60°F 73%
Low level cloud: 8%
Mid level cloud: 69%
High level cloud: 100%
Most Significant Cloud Type: medium
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

5 / 7 kts 58 / 55°F 85%
Low level cloud: 7%
Mid level cloud: 18%
High level cloud: 44%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May
00:00

W
W

5 / 7 kts 53 / 51°F 90%
Low level cloud: 12%
Mid level cloud: 11%
High level cloud: 1%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

4 / 7 kts 51 / 49°F 91%
Low level cloud: 10%
Mid level cloud: 11%
High level cloud: 2%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WNW
WNW

5 / 6 kts 55 / 51°F 82%
Low level cloud: 7%
Mid level cloud: 6%
High level cloud: 41%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WNW
WNW

4 / 5 kts 64 / 61°F 65%
Low level cloud: 27%
Mid level cloud: 8%
High level cloud: 74%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

3 / 4 kts 67 / 66°F 54%
Low level cloud: 90%
Mid level cloud: 12%
High level cloud: 94%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNW
NNW

2 / 3 kts 68 / 65°F 69%
Low level cloud: 50%
Mid level cloud: 44%
High level cloud: 33%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNW
NNW

3 / 4 kts 62 / 61°F 85%
Low level cloud: 79%
Mid level cloud: 39%
High level cloud: 11%
Most Significant Cloud Type: low
94%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

NNE
NNE

3 / 5 kts 57 / 57°F 95%
Low level cloud: 95%
Mid level cloud: 32%
High level cloud: 10%
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
HumidityCloud AmountPrecip AmountWeather
Fri 24
May
00:00

W
W

3 / 6 kts 55 / 55°F 88%
Low level cloud: 3%
Mid level cloud: 7%
High level cloud: 5%
Most Significant Cloud Type: low
5%
0.0 In
06:00

W
W

6 / 11 kts 51 / 48°F 78%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
12:00

ENE
ENE

10 / 20 kts 58 / 55°F 72%
Low level cloud: 96%
Mid level cloud: 12%
High level cloud: 6%
Most Significant Cloud Type: low
100%
0.0 In
18:00

ENE
ENE

5 / 10 kts 62 / 62°F 93%
Low level cloud: 96%
Mid level cloud: 38%
High level cloud: 99%
Most Significant Cloud Type: low
100%
0.0 In
Sat 25
May
00:00

NNE
NNE

6 / 13 kts 53 / 50°F 91%
Low level cloud: 39%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
39%
0.0 In
06:00

W
W

3 / 6 kts 62 / 62°F 69%
Low level cloud: 1%
Mid level cloud: 5%
High level cloud: 12%
Most Significant Cloud Type: medium
9%
0.0 In
12:00

ENE
ENE

10 / 20 kts 65 / 65°F 63%
Low level cloud: 9%
Mid level cloud: 8%
High level cloud: 82%
Most Significant Cloud Type: medium
37%
0.0 In
18:00

W
W

6 / 13 kts 67 / 67°F 64%
Low level cloud: 22%
Mid level cloud: 41%
High level cloud: 99%
Most Significant Cloud Type: low
48%
0.0 In
Sun 26
May
00:00

NE
NE

5 / 9 kts 55 / 54°F 90%
Low level cloud: 20%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
20%
0.0 In
06:00

WSW
WSW

6 / 13 kts 59 / 58°F 92%
Low level cloud: 88%
Mid level cloud: 59%
High level cloud: 9%
Most Significant Cloud Type: low
100%
0.0 In
12:00

ENE
ENE

10 / 20 kts 61 / 61°F 74%
Low level cloud: 91%
Mid level cloud: 89%
High level cloud: 12%
Most Significant Cloud Type: low
100%
0.0 In
18:00

WNW
WNW

9 / 18 kts 65 / 65°F 63%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: high
33%
0.0 In
Mon 27
May
00:00

N
N

4 / 9 kts 53 / 51°F 95%
Low level cloud: 69%
Mid level cloud: 14%
High level cloud: 7%
Most Significant Cloud Type: low
74%
0.0 In
06:00

W
W

5 / 10 kts 59 / 58°F 77%
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 41%
Most Significant Cloud Type: medium
9%
0.0 In
12:00

NE
NE

8 / 17 kts 66 / 66°F 47%
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 15%
Most Significant Cloud Type: medium
4%
0.0 In
18:00

W
W

6 / 13 kts 71 / 71°F 68%
Low level cloud: 25%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
26%
0.0 In
Tue 28
May
00:00

NNW
NNW

3 / 6 kts 54 / 53°F 93%
Low level cloud: 39%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: low
40%
0.0 In
06:00

SSW
SSW

4 / 9 kts 62 / 62°F 86%
Low level cloud: 84%
Mid level cloud: 44%
High level cloud: 82%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NE
NE

5 / 10 kts 66 / 66°F 61%
Low level cloud: 57%
Mid level cloud: 3%
High level cloud: 22%
Most Significant Cloud Type: low
60%
0.0 In
18:00

WNW
WNW

4 / 9 kts 51 / 49°F 94%
Low level cloud: 96%
Mid level cloud: 100%
High level cloud: 9%
Most Significant Cloud Type: low
100%
0.5 In
Wed 29
May
00:00

NNE
NNE

1 / 2 kts 56 / 56°F 94%
Low level cloud: 42%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: low
42%
0.0 In
06:00

W
W

6 / 13 kts 51 / 49°F 83%
Low level cloud: 11%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
12%
0.0 In
12:00

ENE
ENE

4 / 8 kts 70 / 70°F 50%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
18:00

W
W

9 / 19 kts 57 / 55°F 65%
Low level cloud: 9%
Mid level cloud: 14%
High level cloud: 6%
Most Significant Cloud Type: low
15%
0.0 In
Thu 30
May
00:00

NNE
NNE

2 / 5 kts 55 / 56°F 92%
Low level cloud: 38%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
38%
0.0 In
06:00

W
W

7 / 16 kts 51 / 48°F 79%
Low level cloud: 30%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
32%
0.0 In
12:00

ENE
ENE

7 / 15 kts 68 / 68°F 56%
Low level cloud: 24%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
25%
0.0 In
18:00

WNW
WNW

5 / 10 kts 63 / 63°F 58%
Low level cloud: 9%
Mid level cloud: 10%
High level cloud: 55%
Most Significant Cloud Type: low
18%
0.0 In
Fri 31
May
00:00

NNE
NNE

4 / 8 kts 59 / 59°F 90%
Low level cloud: 10%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
11%
0.0 In
06:00

S
S

8 / 17 kts 51 / 47°F 74%
Low level cloud: 69%
Mid level cloud: 85%
High level cloud: 99%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NE
NE

8 / 17 kts 68 / 68°F 52%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
18:00

SSW
SSW

5 / 10 kts 61 / 61°F 89%
Low level cloud: 79%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
89%
0.2 In
Sat 01
Jun
00:00

NNW
NNW

4 / 9 kts 57 / 56°F 81%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: high
8%
0.0 In
06:00

SW
SW

4 / 8 kts 57 / 56°F 92%
Low level cloud: 13%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
12%
0.0 In
12:00

NNE
NNE

8 / 18 kts 67 / 67°F 45%
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
18:00

SSW
SSW

7 / 15 kts 58 / 57°F 81%
Low level cloud: 1%
Mid level cloud: 34%
High level cloud: 99%
Most Significant Cloud Type: medium
40%
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