Fast Forecast

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Little Driffield 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Little Driffield

Yorkshire, United Kingdom

Long range weather outlook for Little Driffield includes 14 day forecast summary:

The outlook for Little Driffield in the two weeks ahead shows the average daytime maximum temperature will be around 22°C, with a high for the two weeks of 27°C expected on the afternoon of Saturday 21st. The average minimum temperature will be 13°C, dipping to its lowest on the morning of Tuesday 24th at 8°C. The coming 14 days will have most days seeing a little rain. The current forecast indicates Sunday 22nd will have the most precipitation with an accumulation of around 3.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 19
Jun		21:00

SE
SE

 7 / 13 mph 58 / 55°F 92% 1026 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 5%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 20
Jun		00:00

SSE
SSE

 6 / 11 mph 55 / 54°F 93% 1026 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 32%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

 7 / 14 mph 55 / 53°F 93% 1026 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 33%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

 7 / 11 mph 60 / 58°F 80% 1025 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 7%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

 10 / 15 mph 69 / 68°F 62% 1024 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 21%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

 12 / 17 mph 77 / 77°F 52% 1023 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 13%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 13 / 20 mph 78 / 78°F 51% 1022 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 37%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

 10 / 18 mph 74 / 76°F 63% 1021 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 66%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

 7 / 15 mph 69 / 67°F 76% 1022 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
Sat 21
Jun		00:00

S
S

 8 / 16 mph 62 / 62°F 79% 1021 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 2%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

 6 / 13 mph 59 / 59°F 80% 1020 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
06:00

S
S

 7 / 12 mph 64 / 62°F 67% 1020 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 12 / 18 mph 74 / 76°F 48% 1018 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 6%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

 14 / 21 mph 81 / 79°F 39% 1017 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 13%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 10 / 18 mph 78 / 78°F 55% 1015 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 100%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

 13 / 23 mph 72 / 76°F 81% 1015 mb
Low level cloud: 1%
Mid level cloud: 43%
High level cloud: 33%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 8 / 17 mph 67 / 65°F 96% 1014 mb
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 6%
Most Significant Cloud Type: medium
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 22
Jun		00:00

S
S

 9 / 17 mph 64 / 64°F 95% 1013 mb
Low level cloud: 4%
Mid level cloud: 46%
High level cloud: 18%
Most Significant Cloud Type: medium
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

 9 / 17 mph 61 / 62°F 97% 1011 mb
Low level cloud: 27%
Mid level cloud: 44%
High level cloud: 62%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

 11 / 16 mph 65 / 63°F 95% 1010 mb
Low level cloud: 46%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

 16 / 20 mph 68 / 66°F 65% 1009 mb
Low level cloud: 55%
Mid level cloud: 2%
High level cloud: 84%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 19 / 24 mph 72 / 76°F 50% 1009 mb
Low level cloud: 18%
Mid level cloud: 32%
High level cloud: 100%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

 23 / 32 mph 72 / 75°F 40% 1008 mb
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

 20 / 30 mph 63 / 63°F 58% 1008 mb
Low level cloud: 11%
Mid level cloud: 79%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 19 / 29 mph 60 / 60°F 71% 1007 mb
Low level cloud: 77%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 23
Jun		00:00

WSW
WSW

 21 / 33 mph 58 / 54°F 84% 1006 mb
Low level cloud: 71%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

 13 / 23 mph 50 / 45°F 88% 1007 mb
Low level cloud: 34%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

 18 / 27 mph 53 / 48°F 74% 1008 mb
Low level cloud: 87%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

 22 / 29 mph 59 / 54°F 63% 1008 mb
Low level cloud: 45%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

 22 / 29 mph 62 / 62°F 47% 1009 mb
Low level cloud: 15%
Mid level cloud: 98%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 24 / 31 mph 64 / 63°F 53% 1010 mb
Low level cloud: 32%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

 20 / 29 mph 63 / 62°F 59% 1011 mb
Low level cloud: 49%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 16 / 26 mph 57 / 53°F 71% 1012 mb
Low level cloud: 12%
Mid level cloud: 4%
High level cloud: 7%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 24
Jun		00:00

WSW
WSW

 11 / 20 mph 51 / 47°F 88% 1013 mb
Low level cloud: 1%
Mid level cloud: 2%
High level cloud: 8%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

 9 / 16 mph 49 / 45°F 95% 1012 mb
Low level cloud: 10%
Mid level cloud: 8%
High level cloud: 15%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 12 / 17 mph 54 / 50°F 82% 1012 mb
Low level cloud: 26%
Mid level cloud: 45%
High level cloud: 61%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 10 / 16 mph 55 / 51°F 84% 1011 mb
Low level cloud: 58%
Mid level cloud: 97%
High level cloud: 12%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 8 / 13 mph 58 / 56°F 82% 1010 mb
Low level cloud: 99%
Mid level cloud: 88%
High level cloud: 13%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

 14 / 20 mph 61 / 61°F 82% 1009 mb
Low level cloud: 88%
Mid level cloud: 14%
High level cloud: 4%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

 15 / 23 mph 66 / 65°F 70% 1009 mb
Low level cloud: 68%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 12 / 20 mph 62 / 60°F 86% 1010 mb
Low level cloud: 48%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 25
Jun		00:00

WSW
WSW

 11 / 18 mph 58 / 55°F 96% 1010 mb
Low level cloud: 72%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

 10 / 17 mph 59 / 57°F 92% 1009 mb
Low level cloud: 32%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

 12 / 17 mph 61 / 59°F 78% 1010 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 32%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

 15 / 19 mph 67 / 65°F 56% 1010 mb
Low level cloud: 48%
Mid level cloud: 31%
High level cloud: 10%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 14 / 17 mph 69 / 69°F 55% 1010 mb
Low level cloud: 97%
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

W
W

 17 / 22 mph 68 / 67°F 57% 1010 mb
Low level cloud: 32%
Mid level cloud: 1%
High level cloud: 13%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

 17 / 24 mph 65 / 63°F 62% 1010 mb
Low level cloud: 9%
Mid level cloud: 26%
High level cloud: 32%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 12 / 21 mph 59 / 56°F 71% 1011 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 98%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 26
Jun		00:00

WSW
WSW

 4 / 7 mph 64 / 64°F 84% 1011 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
06:00

WSW
WSW

 11 / 15 mph 61 / 61°F 71% 1015 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 4%
Most Significant Cloud Type: medium
17%
0.0 In
12:00

WSW
WSW

 23 / 36 mph 75 / 76°F 31% 1005 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
0.0 In
18:00

WSW
WSW

 12 / 23 mph 75 / 77°F 51% 1015 mb
Low level cloud: 5%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
6%
0.0 In
Fri 27
Jun		00:00

SW
SW

 16 / 32 mph 63 / 63°F 83% 1012 mb
Low level cloud: 61%
Mid level cloud: 11%
High level cloud: 46%
Most Significant Cloud Type: low
70%
0.0 In
06:00

SSW
SSW

 23 / 42 mph 60 / 60°F 93% 1001 mb
Low level cloud: 94%
Mid level cloud: 43%
High level cloud: 39%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NW
NW

 4 / 6 mph 74 / 76°F 48% 1022 mb
Low level cloud: 20%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
35%
0.0 In
18:00

WSW
WSW

 2 / 4 mph 77 / 80°F 61% 1020 mb
Low level cloud: 13%
Mid level cloud: 46%
High level cloud: 1%
Most Significant Cloud Type: medium
82%
0.0 In
Sat 28
Jun		00:00

ENE
ENE

 4 / 8 mph 60 / 60°F 92% 1021 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 14%
Most Significant Cloud Type: medium
28%
0.0 In
06:00

SSE
SSE

 5 / 9 mph 66 / 66°F 67% 1019 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 5%
Most Significant Cloud Type: medium
44%
0.0 In
12:00

E
E

 13 / 23 mph 68 / 67°F 64% 1019 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 4%
Most Significant Cloud Type: medium
32%
0.1 In
18:00

SE
SE

 9 / 17 mph 68 / 68°F 66% 1015 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 8%
Most Significant Cloud Type: medium
46%
0.0 In
Sun 29
Jun		00:00

NE
NE

 5 / 9 mph 57 / 56°F 95% 1017 mb
Low level cloud: 13%
Mid level cloud: 17%
High level cloud: 100%
Most Significant Cloud Type: low
30%
0.0 In
06:00

SW
SW

 4 / 8 mph 69 / 69°F 68% 1012 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.0 In
12:00

ENE
ENE

 11 / 21 mph 67 / 67°F 62% 1014 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 28%
Most Significant Cloud Type: medium
7%
0.0 In
18:00

WNW
WNW

 13 / 24 mph 67 / 67°F 70% 1013 mb
Low level cloud: 62%
Mid level cloud: 44%
High level cloud: 38%
Most Significant Cloud Type: low
81%
0.0 In
Mon 30
Jun		00:00

ENE
ENE

 4 / 7 mph 59 / 59°F 96% 1011 mb
Low level cloud: 35%
Mid level cloud: 4%
High level cloud: 46%
Most Significant Cloud Type: low
41%
0.0 In
06:00

N
N

 16 / 31 mph 57 / 53°F 79% 1021 mb
Low level cloud: 48%
Mid level cloud: 31%
High level cloud: 81%
Most Significant Cloud Type: low
68%
0.0 In
12:00

E
E

 6 / 12 mph 68 / 68°F 69% 1009 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 76%
Most Significant Cloud Type: medium
47%
0.0 In
18:00

NNE
NNE

 14 / 27 mph 57 / 54°F 66% 1024 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 100%
Most Significant Cloud Type: medium
15%
0.0 In
Tue 01
Jul		00:00

NNE
NNE

 2 / 4 mph 62 / 62°F 97% 1009 mb
Low level cloud: 71%
Mid level cloud: 46%
High level cloud: 20%
Most Significant Cloud Type: low
89%
0.2 In
06:00

N
N

 11 / 22 mph 54 / 50°F 79% 1022 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 20%
Most Significant Cloud Type: medium
21%
0.0 In
12:00

ESE
ESE

 7 / 14 mph 58 / 56°F 94% 1014 mb
Low level cloud: 89%
Mid level cloud: 3%
High level cloud: 11%
Most Significant Cloud Type: low
91%
0.0 In
18:00

NE
NE

 7 / 13 mph 58 / 57°F 65% 1018 mb
Low level cloud: 0%
Mid level cloud: 82%
High level cloud: 12%
Most Significant Cloud Type: medium
82%
0.0 In
Wed 02
Jul		00:00

SE
SE

 7 / 13 mph 52 / 49°F 95% 1018 mb
Low level cloud: 26%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
25%
0.0 In
06:00

NW
NW

 4 / 7 mph 53 / 52°F 85% 1014 mb
Low level cloud: 19%
Mid level cloud: 43%
High level cloud: 32%
Most Significant Cloud Type: low
38%
0.0 In
12:00

SSE
SSE

 10 / 19 mph 67 / 67°F 50% 1019 mb
Low level cloud: 16%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
30%
0.0 In
18:00

SE
SE

 5 / 9 mph 59 / 59°F 74% 1012 mb
Low level cloud: 10%
Mid level cloud: 83%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
Thu 03
Jul		00:00

S
S

 8 / 16 mph 59 / 59°F 78% 1021 mb
Low level cloud: 42%
Mid level cloud: 42%
High level cloud: 0%
Most Significant Cloud Type: low
56%
0.0 In
06:00

W
W

 7 / 15 mph 54 / 51°F 69% 1012 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
0.0 In
12:00

E
E

 11 / 20 mph 60 / 60°F 81% 1019 mb
Low level cloud: 1%
Mid level cloud: 25%
High level cloud: 100%
Most Significant Cloud Type: medium
31%
0.0 In
18:00

SSW
SSW

 9 / 17 mph 66 / 67°F 51% 1008 mb
Low level cloud: 0%
Mid level cloud: 51%
High level cloud: 0%
Most Significant Cloud Type: medium
50%
0.0 In
Fri 04
Jul		00:00

ESE
ESE

 6 / 11 mph 58 / 57°F 97% 1016 mb
Low level cloud: 68%
Mid level cloud: 32%
High level cloud: 100%
Most Significant Cloud Type: low
91%
0.4 In
06:00

WSW
WSW

 16 / 31 mph 54 / 50°F 88% 1004 mb
Low level cloud: 38%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: low
39%
0.0 In
12:00

ESE
ESE

 9 / 18 mph 60 / 60°F 86% 1014 mb
Low level cloud: 84%
Mid level cloud: 23%
High level cloud: 53%
Most Significant Cloud Type: low
98%
0.1 In
18:00

SW
SW

 17 / 34 mph 63 / 63°F 50% 1004 mb
Low level cloud: 25%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
52%
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