WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Am Balg 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Am Balg

Highland, United Kingdom

Long range weather outlook for Am Balg includes 14 day forecast summary:

The next 14 day outlook for Am Balg shows the average daytime maximum temperature will be around 15°C, with a high for the two weeks of 18°C expected on the afternoon of Tuesday 21st. The average minimum temperature will be 9°C, dipping to its lowest on the morning of Friday 24th at 6°C. The next 14 days will remain predominantly dry. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 15
May
18:00

NNE
NNE

6 / 9 mph 63 / 60°F 86% 1007 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

3 / 7 mph 59 / 58°F 89% 1007 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 16
May
00:00

ESE
ESE

6 / 13 mph 56 / 55°F 90% 1007 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

4 / 8 mph 55 / 55°F 91% 1008 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

3 / 7 mph 55 / 54°F 89% 1009 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

2 / 4 mph 58 / 58°F 81% 1010 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 18%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

4 / 6 mph 62 / 59°F 80% 1011 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 20%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

3 / 5 mph 64 / 61°F 82% 1011 mb
Low level cloud: 19%
Mid level cloud: 20%
High level cloud: 100%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

1 / 2 mph 62 / 59°F 85% 1012 mb
Low level cloud: 8%
Mid level cloud: 19%
High level cloud: 90%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

2 / 4 mph 59 / 58°F 89% 1012 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 14%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 17
May
00:00

S
S

1 / 2 mph 58 / 58°F 92% 1013 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

0 / 1 mph 57 / 57°F 88% 1013 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WNW
WNW

3 / 5 mph 58 / 56°F 88% 1014 mb
Low level cloud: 1%
Mid level cloud: 12%
High level cloud: 2%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

3 / 4 mph 62 / 60°F 81% 1014 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 3%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

8 / 11 mph 58 / 55°F 86% 1014 mb
Low level cloud: 5%
Mid level cloud: 13%
High level cloud: 71%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNW
NNW

7 / 13 mph 54 / 50°F 91% 1014 mb
Low level cloud: 32%
Mid level cloud: 19%
High level cloud: 100%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

9 / 15 mph 49 / 46°F 93% 1015 mb
Low level cloud: 72%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

6 / 11 mph 48 / 45°F 95% 1016 mb
Low level cloud: 80%
Mid level cloud: 40%
High level cloud: 40%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May
00:00

NW
NW

9 / 14 mph 48 / 44°F 95% 1017 mb
Low level cloud: 90%
Mid level cloud: 44%
High level cloud: 4%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

9 / 14 mph 47 / 43°F 93% 1017 mb
Low level cloud: 99%
Mid level cloud: 20%
High level cloud: 43%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NW
NW

7 / 11 mph 46 / 43°F 85% 1018 mb
Low level cloud: 89%
Mid level cloud: 16%
High level cloud: 32%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

6 / 9 mph 49 / 46°F 77% 1018 mb
Low level cloud: 11%
Mid level cloud: 26%
High level cloud: 18%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

11 / 14 mph 51 / 46°F 75% 1019 mb
Low level cloud: 24%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

11 / 15 mph 51 / 47°F 76% 1019 mb
Low level cloud: 94%
Mid level cloud: 71%
High level cloud: 14%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

9 / 12 mph 50 / 47°F 81% 1019 mb
Low level cloud: 100%
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
21:00

WSW
WSW

7 / 11 mph 49 / 46°F 87% 1019 mb
Low level cloud: 100%
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
Sun 19
May
00:00

WNW
WNW

4 / 8 mph 47 / 45°F 91% 1020 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
03:00

NNE
NNE

11 / 19 mph 46 / 41°F 91% 1021 mb
Low level cloud: 58%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NE
NE

13 / 21 mph 46 / 40°F 79% 1022 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 11%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

13 / 21 mph 48 / 42°F 73% 1023 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
12:00

ENE
ENE

15 / 23 mph 49 / 43°F 70% 1023 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 18%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

17 / 25 mph 50 / 43°F 70% 1023 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 14%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

16 / 24 mph 49 / 43°F 74% 1023 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 34%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

17 / 27 mph 48 / 41°F 81% 1023 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 35%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
00:00

E
E

15 / 27 mph 45 / 38°F 81% 1023 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 34%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

13 / 24 mph 44 / 38°F 80% 1022 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 22%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

13 / 22 mph 45 / 39°F 76% 1022 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 17%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

12 / 20 mph 50 / 45°F 71% 1022 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 10%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

11 / 15 mph 57 / 54°F 66% 1021 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 9%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

13 / 17 mph 59 / 56°F 64% 1020 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 4%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

16 / 22 mph 59 / 55°F 64% 1020 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 8%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

14 / 22 mph 53 / 48°F 76% 1020 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
00:00

ESE
ESE

12 / 24 mph 47 / 42°F 77% 1019 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

12 / 25 mph 46 / 41°F 69% 1019 mb
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
06:00

ESE
ESE

13 / 24 mph 47 / 41°F 72% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

14 / 25 mph 53 / 48°F 75% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

16 / 20 mph 61 / 60°F 68% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

14 / 16 mph 65 / 64°F 61% 1016 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 20%
Most Significant Cloud Type: high
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

15 / 19 mph 63 / 62°F 70% 1016 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

8 / 13 mph 58 / 55°F 84% 1017 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 22
May
00:00

NNE
NNE

9 / 15 mph 50 / 46°F 93% 1011 mb
Low level cloud: 70%
Mid level cloud: 34%
High level cloud: 13%
Most Significant Cloud Type: low
83%
0.0 In
06:00

ENE
ENE

20 / 31 mph 44 / 35°F 68% 1019 mb
Low level cloud: 92%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
91%
0.0 In
12:00

E
E

15 / 31 mph 59 / 59°F 70% 1021 mb
Low level cloud: 0%
Mid level cloud: 84%
High level cloud: 100%
Most Significant Cloud Type: medium
87%
0.0 In
18:00

ENE
ENE

27 / 43 mph 45 / 35°F 62% 1025 mb
Low level cloud: 25%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: low
39%
0.0 In
Thu 23
May
00:00

ESE
ESE

13 / 26 mph 55 / 52°F 87% 1019 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 32%
Most Significant Cloud Type: medium
14%
0.0 In
06:00

ESE
ESE

19 / 31 mph 49 / 42°F 85% 1007 mb
Low level cloud: 6%
Mid level cloud: 83%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
12:00

ENE
ENE

9 / 16 mph 50 / 47°F 63% 1028 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 32%
Most Significant Cloud Type: medium
20%
0.0 In
18:00

ENE
ENE

15 / 21 mph 50 / 45°F 70% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Fri 24
May
00:00

SSE
SSE

7 / 13 mph 49 / 46°F 72% 1027 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 13%
Most Significant Cloud Type: medium
31%
0.0 In
06:00

SE
SE

9 / 16 mph 47 / 42°F 77% 1024 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
1%
0.0 In
12:00

ENE
ENE

7 / 12 mph 58 / 57°F 70% 1024 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
18:00

ENE
ENE

5 / 8 mph 58 / 58°F 79% 1020 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
Sat 25
May
00:00

ESE
ESE

6 / 12 mph 56 / 55°F 80% 1021 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
06:00

S
S

4 / 8 mph 51 / 50°F 81% 1018 mb
Low level cloud: 21%
Mid level cloud: 20%
High level cloud: 71%
Most Significant Cloud Type: low
36%
0.0 In
12:00

ESE
ESE

6 / 10 mph 64 / 64°F 66% 1018 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
18:00

SW
SW

12 / 16 mph 56 / 53°F 82% 1016 mb
Low level cloud: 95%
Mid level cloud: 68%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Sun 26
May
00:00

SW
SW

10 / 18 mph 56 / 53°F 80% 1020 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.0 In
06:00

SW
SW

13 / 22 mph 49 / 44°F 91% 1016 mb
Low level cloud: 95%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NE
NE

9 / 16 mph 59 / 57°F 77% 1024 mb
Low level cloud: 32%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
42%
0.0 In
18:00

WSW
WSW

10 / 14 mph 52 / 49°F 82% 1017 mb
Low level cloud: 22%
Mid level cloud: 50%
High level cloud: 6%
Most Significant Cloud Type: low
39%
0.0 In
Mon 27
May
00:00

ESE
ESE

6 / 12 mph 55 / 54°F 87% 1024 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
06:00

SW
SW

15 / 26 mph 48 / 41°F 93% 1016 mb
Low level cloud: 82%
Mid level cloud: 80%
High level cloud: 11%
Most Significant Cloud Type: low
100%
0.0 In
12:00

W
W

8 / 14 mph 58 / 57°F 86% 1023 mb
Low level cloud: 12%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
16%
0.0 In
18:00

W
W

17 / 27 mph 49 / 43°F 76% 1018 mb
Low level cloud: 31%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
33%
0.1 In
Tue 28
May
00:00

NNW
NNW

4 / 7 mph 53 / 52°F 87% 1021 mb
Low level cloud: 11%
Mid level cloud: 7%
High level cloud: 100%
Most Significant Cloud Type: medium
40%
0.0 In
06:00

WSW
WSW

24 / 42 mph 47 / 39°F 78% 1014 mb
Low level cloud: 21%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
37%
0.1 In
12:00

NE
NE

12 / 21 mph 56 / 53°F 81% 1018 mb
Low level cloud: 12%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
16%
0.0 In
18:00

WSW
WSW

27 / 51 mph 51 / 44°F 88% 1008 mb
Low level cloud: 92%
Mid level cloud: 97%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
Wed 29
May
00:00

SSW
SSW

4 / 9 mph 53 / 53°F 80% 1015 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
06:00

WSW
WSW

29 / 61 mph 46 / 37°F 87% 1000 mb
Low level cloud: 74%
Mid level cloud: 67%
High level cloud: 0%
Most Significant Cloud Type: low
97%
0.2 In
12:00

WNW
WNW

8 / 14 mph 57 / 55°F 79% 1013 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
18:00

WNW
WNW

22 / 47 mph 48 / 41°F 86% 1004 mb
Low level cloud: 14%
Mid level cloud: 46%
High level cloud: 2%
Most Significant Cloud Type: medium
85%
0.1 In
Thu 30
May
00:00

NNE
NNE

6 / 11 mph 55 / 53°F 85% 1010 mb
Low level cloud: 2%
Mid level cloud: 34%
High level cloud: 4%
Most Significant Cloud Type: medium
38%
0.0 In
06:00

NW
NW

13 / 27 mph 47 / 41°F 89% 1008 mb
Low level cloud: 32%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
37%
0.1 In
12:00

NNW
NNW

4 / 8 mph 58 / 58°F 78% 1006 mb
Low level cloud: 20%
Mid level cloud: 22%
High level cloud: 16%
Most Significant Cloud Type: low
29%
0.0 In
18:00

WSW
WSW

10 / 21 mph 50 / 46°F 78% 1010 mb
Low level cloud: 30%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: low
45%
0.0 In

Other Locations Near to Am Balg

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