Fast Forecast

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Suffield 14 Day Long Range Forecast

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

Alberta, Canada

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

For Suffield in the coming two weeks the average daytime maximum temperature will be around 17°C, with a high for the two weeks of 25°C expected on the evening of Saturday 11th. The average minimum temperature will be 9°C, dipping to its lowest on the morning of Tuesday 14th at 7°C. The coming 14 days will have some days seeing a little precipitation and some days with rain or snow. It looks like Tuesday 7th will have the most precipitation with an accumulation of around 46.0mm. On the whole winds are likely to be moderate. Expect the strongest wind on the afternoon of Tuesday 7th, coming from a northerly direction, and reaching around 26mph.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 05
May		00:00

ESE
ESE

 12 / 23 mph 48 / 43°F 48% 1008 mb
Low level cloud: 0%
Mid level cloud: 94%
High level cloud: 35%
Most Significant Cloud Type: medium
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

 13 / 23 mph 46 / 41°F 46% 1006 mb
Low level cloud: 0%
Mid level cloud: 61%
High level cloud: 80%
Most Significant Cloud Type: medium
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

 14 / 25 mph 44 / 38°F 49% 1004 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 53%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

 15 / 19 mph 50 / 44°F 46% 1003 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 97%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

 19 / 22 mph 59 / 54°F 39% 1000 mb
Low level cloud: 0%
Mid level cloud: 65%
High level cloud: 100%
Most Significant Cloud Type: medium
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

 18 / 21 mph 64 / 62°F 38% 997 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

 14 / 18 mph 63 / 62°F 43% 995 mb
Low level cloud: 0%
Mid level cloud: 66%
High level cloud: 95%
Most Significant Cloud Type: medium
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

 7 / 14 mph 57 / 53°F 59% 995 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 06
May		21:00

W
W

 21 / 30 mph 47 / 40°F 93% 988 mb
Low level cloud: 93%
Mid level cloud: 84%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
Tue 07
May		00:00

WNW
WNW

 17 / 25 mph 48 / 42°F 97% 987 mb
Low level cloud: 98%
Mid level cloud: 94%
High level cloud: 97%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
03:00

W
W

 19 / 29 mph 45 / 38°F 96% 986 mb
Low level cloud: 100%
Mid level cloud: 99%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

NW
NW

 18 / 27 mph 46 / 38°F 95% 987 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 95%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
09:00

NNW
NNW

 21 / 32 mph 46 / 38°F 96% 987 mb
Low level cloud: 100%
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
12:00

NNW
NNW

 27 / 39 mph 45 / 36°F 95% 987 mb
Low level cloud: 99%
Mid level cloud: 98%
High level cloud: 73%
Most Significant Cloud Type: low
100%
Expect 0.5 In of precipitation over the past 3 hours.
0.5 In
15:00

NNE
NNE

 16 / 23 mph 53 / 47°F 83% 989 mb
Low level cloud: 62%
Mid level cloud: 90%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
18:00

NNE
NNE

 13 / 19 mph 51 / 46°F 92% 992 mb
Low level cloud: 59%
Mid level cloud: 45%
High level cloud: 98%
Most Significant Cloud Type: low
86%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
21:00

NNE
NNE

 19 / 28 mph 49 / 42°F 92% 997 mb
Low level cloud: 81%
Mid level cloud: 66%
High level cloud: 12%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
Wed 08
May		00:00

N
N

 14 / 20 mph 48 / 43°F 95% 1000 mb
Low level cloud: 80%
Mid level cloud: 78%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

N
N

 15 / 24 mph 46 / 40°F 95% 1004 mb
Low level cloud: 84%
Mid level cloud: 52%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
06:00

NNW
NNW

 17 / 28 mph 45 / 38°F 97% 1007 mb
Low level cloud: 100%
Mid level cloud: 91%
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

N
N

 15 / 21 mph 49 / 43°F 92% 1010 mb
Low level cloud: 95%
Mid level cloud: 71%
High level cloud: 54%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

N
N

 13 / 16 mph 52 / 48°F 93% 1013 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 18%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 16 / 18 mph 54 / 50°F 78% 1015 mb
Low level cloud: 86%
Mid level cloud: 54%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

 10 / 13 mph 53 / 49°F 77% 1018 mb
Low level cloud: 4%
Mid level cloud: 51%
High level cloud: 0%
Most Significant Cloud Type: medium
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 4 / 6 mph 50 / 49°F 83% 1021 mb
Low level cloud: 5%
Mid level cloud: 67%
High level cloud: 11%
Most Significant Cloud Type: medium
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 09
May		00:00

N
N

 6 / 10 mph 50 / 47°F 84% 1022 mb
Low level cloud: 11%
Mid level cloud: 76%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

 4 / 8 mph 49 / 48°F 87% 1024 mb
Low level cloud: 1%
Mid level cloud: 86%
High level cloud: 0%
Most Significant Cloud Type: medium
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NW
NW

 6 / 11 mph 49 / 46°F 90% 1026 mb
Low level cloud: 11%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NW
NW

 7 / 10 mph 53 / 49°F 85% 1027 mb
Low level cloud: 16%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WNW
WNW

 9 / 11 mph 58 / 55°F 71% 1027 mb
Low level cloud: 0%
Mid level cloud: 52%
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

NW
NW

 9 / 10 mph 65 / 62°F 54% 1025 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

 6 / 8 mph 65 / 63°F 50% 1025 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 11%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

 6 / 11 mph 60 / 58°F 61% 1025 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 10
May		00:00

WSW
WSW

 7 / 14 mph 56 / 54°F 64% 1025 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

 9 / 18 mph 51 / 47°F 77% 1025 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 3%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

 7 / 15 mph 48 / 45°F 74% 1026 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
09:00

SW
SW

 8 / 10 mph 58 / 55°F 56% 1024 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 9 / 10 mph 66 / 65°F 42% 1022 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
15:00

SSW
SSW

 11 / 12 mph 70 / 68°F 37% 1019 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
18:00

SSW
SSW

 12 / 15 mph 70 / 68°F 39% 1016 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 8 / 17 mph 62 / 60°F 58% 1015 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
Sat 11
May		00:00

SSW
SSW

 9 / 19 mph 55 / 53°F 67% 1014 mb
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
03:00

SSW
SSW

 9 / 18 mph 51 / 48°F 74% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 10%
Most Significant Cloud Type: high
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 7 / 15 mph 48 / 45°F 81% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 8%
Most Significant Cloud Type: high
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 6 / 8 mph 59 / 57°F 63% 1010 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
12:00

W
W

 4 / 5 mph 70 / 68°F 46% 1008 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
15:00

NNW
NNW

 4 / 4 mph 76 / 75°F 30% 1007 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
18:00

N
N

 2 / 3 mph 77 / 75°F 28% 1006 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 1 / 2 mph 67 / 65°F 45% 1005 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 10%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 12
May		00:00

ENE
ENE

 8 / 15 mph 55 / 53°F 54% 1024 mb
Low level cloud: 0%
Mid level cloud: 62%
High level cloud: 94%
Most Significant Cloud Type: medium
65%
0.0 In
06:00

E
E

 11 / 14 mph 40 / 34°F 90% 1019 mb
Low level cloud: 88%
Mid level cloud: 81%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
12:00

W
W

 12 / 19 mph 70 / 70°F 49% 1006 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 8%
Most Significant Cloud Type: medium
3%
0.0 In
18:00

NE
NE

 4 / 6 mph 75 / 75°F 28% 1007 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
Mon 13
May		00:00

SSW
SSW

 7 / 15 mph 63 / 64°F 45% 1009 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
06:00

S
S

 11 / 23 mph 59 / 57°F 63% 1004 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
12:00

E
E

 18 / 36 mph 51 / 45°F 85% 1014 mb
Low level cloud: 30%
Mid level cloud: 90%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
18:00

WSW
WSW

 21 / 40 mph 78 / 77°F 31% 997 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
Tue 14
May		00:00

E
E

 17 / 33 mph 47 / 41°F 82% 1011 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 3%
Most Significant Cloud Type: medium
22%
0.0 In
06:00

NW
NW

 16 / 30 mph 52 / 47°F 65% 1005 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 4%
Most Significant Cloud Type: medium
19%
0.0 In
12:00

SE
SE

 13 / 25 mph 55 / 52°F 72% 1004 mb
Low level cloud: 62%
Mid level cloud: 98%
High level cloud: 99%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SSW
SSW

 11 / 21 mph 65 / 65°F 41% 1002 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 34%
Most Significant Cloud Type: medium
44%
0.0 In
Wed 15
May		00:00

ESE
ESE

 11 / 22 mph 55 / 53°F 90% 998 mb
Low level cloud: 41%
Mid level cloud: 44%
High level cloud: 62%
Most Significant Cloud Type: low
63%
0.2 In
06:00

N
N

 9 / 16 mph 46 / 42°F 88% 1003 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SE
SE

 9 / 20 mph 62 / 62°F 70% 997 mb
Low level cloud: 55%
Mid level cloud: 26%
High level cloud: 53%
Most Significant Cloud Type: low
70%
0.0 In
18:00

NNE
NNE

 9 / 17 mph 51 / 48°F 64% 1003 mb
Low level cloud: 12%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.1 In
Thu 16
May		00:00

SE
SE

 7 / 15 mph 54 / 52°F 87% 998 mb
Low level cloud: 5%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
0.2 In
06:00

NNW
NNW

 9 / 17 mph 42 / 37°F 90% 1008 mb
Low level cloud: 14%
Mid level cloud: 31%
High level cloud: 4%
Most Significant Cloud Type: low
25%
0.0 In
12:00

N
N

 15 / 31 mph 49 / 43°F 89% 1004 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 86%
Most Significant Cloud Type: low
100%
0.1 In
18:00

NNE
NNE

 19 / 38 mph 56 / 52°F 50% 1012 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
0.0 In
Fri 17
May		00:00

NNE
NNE

 8 / 17 mph 45 / 40°F 85% 1009 mb
Low level cloud: 85%
Mid level cloud: 46%
High level cloud: 3%
Most Significant Cloud Type: low
100%
0.1 In
06:00

NW
NW

 10 / 21 mph 41 / 35°F 83% 1022 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
12:00

N
N

 15 / 32 mph 48 / 42°F 80% 1008 mb
Low level cloud: 99%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NNW
NNW

 15 / 30 mph 60 / 60°F 40% 1018 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 6%
Most Significant Cloud Type: medium
31%
0.0 In
Sat 18
May		00:00

NNW
NNW

 11 / 23 mph 42 / 35°F 87% 1008 mb
Low level cloud: 66%
Mid level cloud: 67%
High level cloud: 14%
Most Significant Cloud Type: low
91%
0.0 In
06:00

SSW
SSW

 9 / 18 mph 47 / 42°F 67% 1014 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 14%
Most Significant Cloud Type: medium
6%
0.0 In
12:00

NNW
NNW

 20 / 42 mph 36 / 26°F 97% 1008 mb
Low level cloud: 100%
Mid level cloud: 92%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.7 In
18:00

SW
SW

 15 / 31 mph 71 / 71°F 35% 1004 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 7%
Most Significant Cloud Type: medium
9%
0.0 In
Sun 19
May		00:00

NNW
NNW

 9 / 19 mph 34 / 27°F 100% 1011 mb
Low level cloud: 100%
Mid level cloud: 83%
High level cloud: 13%
Most Significant Cloud Type: low
100%
0.8 In
06:00

WNW
WNW

 14 / 30 mph 51 / 46°F 55% 1015 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
12:00

N
N

 14 / 29 mph 41 / 33°F 100% 1011 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 95%
Most Significant Cloud Type: low
100%
0.3 In
18:00

NNW
NNW

 21 / 43 mph 61 / 61°F 35% 1017 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 1%
Most Significant Cloud Type: medium
43%
0.0 In
Mon 20
May		00:00

N
N

 7 / 14 mph 40 / 35°F 99% 1015 mb
Low level cloud: 98%
Mid level cloud: 100%
High level cloud: 20%
Most Significant Cloud Type: low
100%
0.3 In
06:00

NNW
NNW

 3 / 6 mph 44 / 43°F 76% 1019 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 3%
Most Significant Cloud Type: medium
6%
0.0 In
12:00

WNW
WNW

 9 / 19 mph 43 / 37°F 91% 1016 mb
Low level cloud: 96%
Mid level cloud: 65%
High level cloud: 41%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NE
NE

 6 / 14 mph 64 / 64°F 37% 1013 mb
Low level cloud: 0%
Mid level cloud: 39%
High level cloud: 100%
Most Significant Cloud Type: medium
43%
0.0 In

Other Locations Near to Suffield

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