WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Drumhany North 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Drumhany North

Leitrim, Ireland

Long range weather outlook for Drumhany North includes 14 day forecast summary:

The forecast for Drumhany North in the coming two weeks is predicting the average daytime maximum temperature will be around 15°C, with a high for the two weeks of 17°C expected on the afternoon of Thursday 30th. The average minimum temperature will be 8°C, dipping to its lowest on the morning of Friday 24th at 6°C. The next 14 days will have some days seeing a little precipitation and some days with rain. Current predictions suggest Sunday 26th 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
Fri 24
May
18:00

SSE
SSE

1 / 1 mph 56 / 56°F 74% 1017 mb
Low level cloud: 84%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

4 / 5 mph 54 / 53°F 88% 1017 mb
Low level cloud: 73%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 25
May
00:00

ESE
ESE

4 / 7 mph 50 / 48°F 95% 1016 mb
Low level cloud: 51%
Mid level cloud: 86%
High level cloud: 0%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

4 / 7 mph 48 / 46°F 93% 1016 mb
Low level cloud: 39%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

5 / 7 mph 50 / 47°F 85% 1015 mb
Low level cloud: 8%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

9 / 11 mph 57 / 53°F 66% 1014 mb
Low level cloud: 54%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

9 / 11 mph 58 / 56°F 68% 1013 mb
Low level cloud: 79%
Mid level cloud: 42%
High level cloud: 70%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

11 / 13 mph 61 / 59°F 70% 1011 mb
Low level cloud: 52%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

7 / 11 mph 54 / 49°F 94% 1010 mb
Low level cloud: 26%
Mid level cloud: 51%
High level cloud: 100%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

7 / 11 mph 50 / 47°F 98% 1010 mb
Low level cloud: 86%
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
Sun 26
May
00:00

ESE
ESE

6 / 7 mph 50 / 48°F 98% 1009 mb
Low level cloud: 94%
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

E
E

4 / 6 mph 49 / 47°F 99% 1008 mb
Low level cloud: 94%
Mid level cloud: 95%
High level cloud: 76%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

E
E

3 / 4 mph 48 / 47°F 99% 1008 mb
Low level cloud: 99%
Mid level cloud: 85%
High level cloud: 74%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

2 / 3 mph 51 / 51°F 96% 1008 mb
Low level cloud: 86%
Mid level cloud: 90%
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

W
W

4 / 6 mph 54 / 54°F 92% 1008 mb
Low level cloud: 78%
Mid level cloud: 78%
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

WNW
WNW

3 / 4 mph 56 / 56°F 94% 1008 mb
Low level cloud: 91%
Mid level cloud: 70%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

W
W

4 / 5 mph 54 / 54°F 96% 1008 mb
Low level cloud: 90%
Mid level cloud: 66%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

W
W

5 / 6 mph 52 / 50°F 98% 1010 mb
Low level cloud: 94%
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
Mon 27
May
00:00

WSW
WSW

4 / 6 mph 48 / 46°F 99% 1010 mb
Low level cloud: 94%
Mid level cloud: 100%
High level cloud: 96%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

4 / 6 mph 47 / 45°F 98% 1011 mb
Low level cloud: 94%
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

WSW
WSW

3 / 4 mph 48 / 46°F 98% 1012 mb
Low level cloud: 35%
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
09:00

WSW
WSW

5 / 6 mph 54 / 52°F 79% 1012 mb
Low level cloud: 77%
Mid level cloud: 46%
High level cloud: 12%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

5 / 6 mph 59 / 58°F 58% 1012 mb
Low level cloud: 82%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

7 / 8 mph 62 / 59°F 59% 1012 mb
Low level cloud: 52%
Mid level cloud: 46%
High level cloud: 6%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

6 / 8 mph 59 / 56°F 72% 1012 mb
Low level cloud: 26%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

3 / 6 mph 47 / 46°F 97% 1013 mb
Low level cloud: 9%
Mid level cloud: 18%
High level cloud: 99%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 28
May
00:00

S
S

3 / 6 mph 44 / 43°F 97% 1013 mb
Low level cloud: 19%
Mid level cloud: 66%
High level cloud: 84%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

3 / 6 mph 45 / 44°F 97% 1012 mb
Low level cloud: 39%
Mid level cloud: 79%
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

SE
SE

4 / 5 mph 49 / 48°F 90% 1012 mb
Low level cloud: 15%
Mid level cloud: 78%
High level cloud: 12%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

5 / 7 mph 50 / 48°F 92% 1012 mb
Low level cloud: 99%
Mid level cloud: 69%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

4 / 6 mph 51 / 50°F 99% 1011 mb
Low level cloud: 100%
Mid level cloud: 76%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

5 / 7 mph 56 / 55°F 99% 1011 mb
Low level cloud: 98%
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
18:00

SSW
SSW

5 / 8 mph 57 / 56°F 99% 1011 mb
Low level cloud: 100%
Mid level cloud: 20%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

6 / 9 mph 56 / 55°F 99% 1011 mb
Low level cloud: 100%
Mid level cloud: 45%
High level cloud: 93%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 29
May
00:00

SSW
SSW

5 / 8 mph 56 / 55°F 99% 1011 mb
Low level cloud: 98%
Mid level cloud: 48%
High level cloud: 48%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

6 / 10 mph 57 / 55°F 99% 1009 mb
Low level cloud: 99%
Mid level cloud: 92%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

SW
SW

8 / 12 mph 56 / 54°F 99% 1009 mb
Low level cloud: 100%
Mid level cloud: 50%
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

SW
SW

8 / 11 mph 57 / 55°F 98% 1010 mb
Low level cloud: 97%
Mid level cloud: 19%
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

SW
SW

9 / 11 mph 62 / 60°F 90% 1010 mb
Low level cloud: 61%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

9 / 11 mph 62 / 62°F 66% 1010 mb
Low level cloud: 80%
Mid level cloud: 26%
High level cloud: 61%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

8 / 11 mph 60 / 57°F 80% 1009 mb
Low level cloud: 40%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

7 / 12 mph 53 / 49°F 94% 1009 mb
Low level cloud: 48%
Mid level cloud: 54%
High level cloud: 0%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 30
May
00:00

WSW
WSW

6 / 9 mph 50 / 48°F 97% 1009 mb
Low level cloud: 82%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

7 / 11 mph 51 / 48°F 96% 1010 mb
Low level cloud: 86%
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
06:00

WNW
WNW

10 / 14 mph 53 / 49°F 88% 1012 mb
Low level cloud: 100%
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
09:00

WNW
WNW

10 / 12 mph 58 / 55°F 81% 1013 mb
Low level cloud: 66%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

11 / 14 mph 63 / 61°F 70% 1015 mb
Low level cloud: 33%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

11 / 12 mph 63 / 62°F 63% 1016 mb
Low level cloud: 24%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

9 / 11 mph 59 / 56°F 71% 1018 mb
Low level cloud: 24%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NW
NW

6 / 10 mph 52 / 48°F 93% 1020 mb
Low level cloud: 48%
Mid level cloud: 5%
High level cloud: 8%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Fri 31
May
00:00

NW
NW

6 / 12 mph 52 / 50°F 99% 1000 mb
Low level cloud: 100%
Mid level cloud: 89%
High level cloud: 70%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NW
NW

3 / 6 mph 49 / 48°F 98% 1003 mb
Low level cloud: 67%
Mid level cloud: 28%
High level cloud: 8%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NW
NW

10 / 21 mph 61 / 61°F 65% 1010 mb
Low level cloud: 40%
Mid level cloud: 21%
High level cloud: 20%
Most Significant Cloud Type: low
49%
0.0 In
18:00

NNW
NNW

10 / 20 mph 61 / 61°F 70% 1022 mb
Low level cloud: 26%
Mid level cloud: 21%
High level cloud: 4%
Most Significant Cloud Type: low
34%
0.0 In
Sat 01
Jun
00:00

W
W

4 / 9 mph 40 / 37°F 89% 1016 mb
Low level cloud: 30%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
34%
0.0 In
06:00

N
N

5 / 11 mph 52 / 51°F 65% 1021 mb
Low level cloud: 65%
Mid level cloud: 2%
High level cloud: 6%
Most Significant Cloud Type: low
66%
0.0 In
12:00

W
W

7 / 15 mph 58 / 57°F 81% 1024 mb
Low level cloud: 87%
Mid level cloud: 76%
High level cloud: 8%
Most Significant Cloud Type: low
100%
0.0 In
18:00

W
W

5 / 11 mph 57 / 56°F 92% 1024 mb
Low level cloud: 90%
Mid level cloud: 67%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.0 In
Sun 02
Jun
00:00

WSW
WSW

5 / 10 mph 54 / 53°F 95% 1024 mb
Low level cloud: 94%
Mid level cloud: 78%
High level cloud: 61%
Most Significant Cloud Type: low
100%
0.0 In
06:00

WNW
WNW

2 / 5 mph 51 / 51°F 94% 1025 mb
Low level cloud: 47%
Mid level cloud: 46%
High level cloud: 19%
Most Significant Cloud Type: low
65%
0.0 In
12:00

WNW
WNW

10 / 21 mph 62 / 62°F 77% 1024 mb
Low level cloud: 91%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
96%
0.0 In
18:00

NW
NW

9 / 18 mph 58 / 57°F 76% 1027 mb
Low level cloud: 83%
Mid level cloud: 4%
High level cloud: 10%
Most Significant Cloud Type: low
85%
0.0 In
Mon 03
Jun
00:00

NW
NW

9 / 19 mph 52 / 49°F 90% 1024 mb
Low level cloud: 94%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
94%
0.0 In
06:00

WNW
WNW

7 / 14 mph 53 / 51°F 85% 1028 mb
Low level cloud: 98%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
99%
0.0 In
12:00

NW
NW

11 / 23 mph 60 / 60°F 54% 1025 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
18:00

NW
NW

8 / 17 mph 58 / 56°F 81% 1026 mb
Low level cloud: 88%
Mid level cloud: 6%
High level cloud: 1%
Most Significant Cloud Type: low
90%
0.0 In
Tue 04
Jun
00:00

NW
NW

9 / 19 mph 51 / 47°F 76% 1023 mb
Low level cloud: 72%
Mid level cloud: 4%
High level cloud: 19%
Most Significant Cloud Type: low
76%
0.0 In
06:00

NW
NW

8 / 17 mph 51 / 48°F 78% 1023 mb
Low level cloud: 84%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
84%
0.0 In
12:00

NW
NW

9 / 19 mph 60 / 60°F 53% 1019 mb
Low level cloud: 0%
Mid level cloud: 75%
High level cloud: 8%
Most Significant Cloud Type: medium
74%
0.0 In
18:00

NW
NW

9 / 18 mph 57 / 55°F 68% 1022 mb
Low level cloud: 40%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
39%
0.0 In
Wed 05
Jun
00:00

NW
NW

5 / 10 mph 52 / 51°F 93% 1015 mb
Low level cloud: 91%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
06:00

WNW
WNW

9 / 19 mph 53 / 50°F 90% 1019 mb
Low level cloud: 97%
Mid level cloud: 7%
High level cloud: 4%
Most Significant Cloud Type: low
99%
0.0 In
12:00

NW
NW

11 / 22 mph 60 / 60°F 50% 1011 mb
Low level cloud: 12%
Mid level cloud: 0%
High level cloud: 10%
Most Significant Cloud Type: low
13%
0.0 In
18:00

NW
NW

8 / 17 mph 57 / 55°F 60% 1021 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 18%
Most Significant Cloud Type: medium
14%
0.0 In
Thu 06
Jun
00:00

WNW
WNW

8 / 17 mph 49 / 45°F 82% 1006 mb
Low level cloud: 69%
Mid level cloud: 20%
High level cloud: 97%
Most Significant Cloud Type: low
87%
0.0 In
06:00

WSW
WSW

3 / 6 mph 50 / 50°F 83% 1021 mb
Low level cloud: 88%
Mid level cloud: 57%
High level cloud: 7%
Most Significant Cloud Type: low
100%
0.0 In
12:00

N
N

12 / 25 mph 58 / 56°F 78% 999 mb
Low level cloud: 76%
Mid level cloud: 22%
High level cloud: 8%
Most Significant Cloud Type: low
84%
0.2 In
18:00

WNW
WNW

9 / 18 mph 57 / 55°F 82% 1019 mb
Low level cloud: 60%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
70%
0.0 In
Fri 07
Jun
00:00

NNW
NNW

3 / 7 mph 42 / 40°F 97% 1009 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
06:00

N
N

2 / 4 mph 46 / 46°F 86% 1021 mb
Low level cloud: 2%
Mid level cloud: 13%
High level cloud: 85%
Most Significant Cloud Type: medium
21%
0.0 In
12:00

N
N

7 / 16 mph 62 / 62°F 53% 1010 mb
Low level cloud: 61%
Mid level cloud: 36%
High level cloud: 32%
Most Significant Cloud Type: low
77%
0.0 In
18:00

WSW
WSW

3 / 6 mph 58 / 59°F 62% 1018 mb
Low level cloud: 78%
Mid level cloud: 50%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Sat 08
Jun
00:00

NW
NW

5 / 10 mph 44 / 42°F 97% 1014 mb
Low level cloud: 5%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NE
NE

2 / 5 mph 49 / 49°F 94% 1017 mb
Low level cloud: 96%
Mid level cloud: 48%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.0 In
12:00

WNW
WNW

8 / 17 mph 63 / 63°F 51% 1014 mb
Low level cloud: 14%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
14%
0.0 In
18:00

NNW
NNW

4 / 8 mph 60 / 60°F 61% 1016 mb
Low level cloud: 11%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
59%
0.0 In

Other Locations Near to Drumhany North

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