Fast Forecast

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Zyrjanka 14 Day Long Range Forecast

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

Russia

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

The next 14 day outlook for Zyrjanka shows the average daytime maximum temperature will be around -29°C, with a high for the two weeks of -21°C expected on the afternoon of Wednesday 12th. The mean minimum temperature will be -36°C, dipping to its lowest on the morning of Wednesday 5th at -48°C. The next 14 days will have most days seeing a little snow. It looks like Wednesday 12th will have the most precipitation with an accumulation of around 7.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 05
Feb		18:00

S
S

 3 / 6 mph -45 / -57°F 94% 1038 mb
Low level cloud: 3%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

 3 / 7 mph -48 / -63°F 95% 1040 mb
Low level cloud: 3%
Mid level cloud: 8%
High level cloud: 9%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 06
Feb		00:00

S
S

 3 / 6 mph -50 / -64°F 96% 1042 mb
Low level cloud: 6%
Mid level cloud: 10%
High level cloud: 14%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

 3 / 7 mph -52 / -66°F 97% 1043 mb
Low level cloud: 14%
Mid level cloud: 11%
High level cloud: 14%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

 4 / 9 mph -52 / -70°F 99% 1044 mb
Low level cloud: 29%
Mid level cloud: 10%
High level cloud: 5%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

 4 / 7 mph -54 / -69°F 99% 1046 mb
Low level cloud: 32%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

 4 / 9 mph -47 / -64°F 96% 1047 mb
Low level cloud: 24%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

 2 / 4 mph -37 / -47°F 86% 1047 mb
Low level cloud: 2%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

 2 / 4 mph -43 / -52°F 92% 1047 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

 2 / 4 mph -47 / -56°F 93% 1048 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 07
Feb		00:00

S
S

 2 / 5 mph -49 / -60°F 95% 1049 mb
Low level cloud: 2%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

 3 / 7 mph -50 / -65°F 97% 1049 mb
Low level cloud: 8%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

 4 / 8 mph -52 / -68°F 98% 1049 mb
Low level cloud: 15%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

 4 / 9 mph -52 / -70°F 99% 1049 mb
Low level cloud: 21%
Mid level cloud: 31%
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

S
S

 5 / 11 mph -46 / -64°F 96% 1048 mb
Low level cloud: 31%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 3 / 6 mph -36 / -48°F 89% 1047 mb
Low level cloud: 11%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

 4 / 9 mph -42 / -57°F 94% 1046 mb
Low level cloud: 2%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

 5 / 10 mph -46 / -64°F 96% 1046 mb
Low level cloud: 11%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 08
Feb		00:00

S
S

 5 / 11 mph -47 / -67°F 97% 1045 mb
Low level cloud: 7%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

 6 / 12 mph -46 / -66°F 96% 1044 mb
Low level cloud: 8%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

 5 / 11 mph -46 / -65°F 96% 1043 mb
Low level cloud: 11%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

 6 / 12 mph -45 / -65°F 95% 1042 mb
Low level cloud: 8%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

 6 / 12 mph -41 / -60°F 92% 1041 mb
Low level cloud: 3%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

 5 / 8 mph -31 / -46°F 85% 1040 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

 3 / 7 mph -37 / -51°F 91% 1039 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

 2 / 5 mph -42 / -53°F 93% 1039 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
Sun 09
Feb		00:00

S
S

 1 / 2 mph -45 / -45°F 96% 1038 mb
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
03:00

SW
SW

 1 / 2 mph -47 / -47°F 98% 1037 mb
Low level cloud: 6%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NW
NW

 0 / 0 mph -49 / -49°F 100% 1037 mb
Low level cloud: 24%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNW
NNW

 2 / 5 mph -50 / -61°F 100% 1037 mb
Low level cloud: 57%
Mid level cloud: 8%
High level cloud: 33%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

N
N

 6 / 11 mph -41 / -59°F 97% 1036 mb
Low level cloud: 89%
Mid level cloud: 32%
High level cloud: 93%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

 8 / 12 mph -33 / -54°F 94% 1034 mb
Low level cloud: 82%
Mid level cloud: 27%
High level cloud: 77%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

N
N

 7 / 13 mph -32 / -52°F 96% 1034 mb
Low level cloud: 87%
Mid level cloud: 100%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

 9 / 15 mph -30 / -52°F 96% 1033 mb
Low level cloud: 88%
Mid level cloud: 100%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 10
Feb		00:00

N
N

 10 / 15 mph -26 / -49°F 95% 1033 mb
Low level cloud: 81%
Mid level cloud: 100%
High level cloud: 97%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNW
NNW

 11 / 15 mph -25 / -47°F 94% 1033 mb
Low level cloud: 77%
Mid level cloud: 65%
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

N
N

 11 / 15 mph -23 / -45°F 93% 1033 mb
Low level cloud: 67%
Mid level cloud: 100%
High level cloud: 67%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

 11 / 15 mph -20 / -42°F 91% 1033 mb
Low level cloud: 63%
Mid level cloud: 100%
High level cloud: 61%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

N
N

 11 / 15 mph -18 / -39°F 91% 1033 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

 12 / 16 mph -15 / -36°F 94% 1032 mb
Low level cloud: 100%
Mid level cloud: 83%
High level cloud: 12%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

N
N

 10 / 14 mph -14 / -33°F 96% 1033 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 80%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

 9 / 13 mph -14 / -32°F 98% 1033 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 66%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 11
Feb		00:00

N
N

 9 / 12 mph -12 / -30°F 98% 1033 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 64%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNW
NNW

 10 / 15 mph -13 / -33°F 97% 1032 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
06:00

NNW
NNW

 10 / 16 mph -14 / -34°F 97% 1031 mb
Low level cloud: 100%
Mid level cloud: 60%
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

NNW
NNW

 11 / 15 mph -12 / -32°F 96% 1031 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
12:00

NNW
NNW

 12 / 14 mph -10 / -29°F 97% 1030 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
15:00

NNW
NNW

 13 / 15 mph -8 / -29°F 96% 1028 mb
Low level cloud: 100%
Mid level cloud: 93%
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

NNW
NNW

 13 / 18 mph -10 / -30°F 97% 1028 mb
Low level cloud: 100%
Mid level cloud: 92%
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

NNW
NNW

 14 / 26 mph -11 / -33°F 98% 1027 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
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 12
Feb		00:00

NNW
NNW

 11 / 18 mph -21 / -43°F 97% 1017 mb
Low level cloud: 100%
Mid level cloud: 13%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NNW
NNW

 9 / 13 mph -15 / -34°F 98% 1007 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NNW
NNW

 15 / 20 mph -15 / -38°F 95% 1017 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NNW
NNW

 11 / 16 mph -11 / -31°F 98% 1009 mb
Low level cloud: 100%
Mid level cloud: 63%
High level cloud: 26%
Most Significant Cloud Type: low
100%
0.0 In
Thu 13
Feb		00:00

NNW
NNW

 20 / 29 mph -11 / -36°F 98% 1011 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
06:00

SSE
SSE

 4 / 8 mph -29 / -42°F 100% 1011 mb
Low level cloud: 99%
Mid level cloud: 23%
High level cloud: 21%
Most Significant Cloud Type: low
100%
0.0 In
12:00

S
S

 4 / 7 mph -24 / -36°F 98% 1025 mb
Low level cloud: 100%
Mid level cloud: 43%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NE
NE

 1 / 2 mph -9 / -9°F 100% 1015 mb
Low level cloud: 95%
Mid level cloud: 43%
High level cloud: 51%
Most Significant Cloud Type: low
100%
0.0 In
Fri 14
Feb		00:00

SSE
SSE

 1 / 3 mph -18 / -18°F 97% 1025 mb
Low level cloud: 100%
Mid level cloud: 84%
High level cloud: 8%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NNW
NNW

 6 / 10 mph -14 / -29°F 98% 1018 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

N
N

 4 / 8 mph -23 / -36°F 98% 1028 mb
Low level cloud: 98%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NNW
NNW

 13 / 19 mph -8 / -28°F 98% 1018 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Sat 15
Feb		00:00

NNW
NNW

 9 / 13 mph -20 / -40°F 98% 1029 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 16%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NNW
NNW

 13 / 19 mph -5 / -25°F 98% 1015 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
12:00

N
N

 5 / 6 mph -15 / -27°F 95% 1031 mb
Low level cloud: 100%
Mid level cloud: 61%
High level cloud: 29%
Most Significant Cloud Type: low
100%
0.1 In
18:00

SSE
SSE

 3 / 6 mph -8 / -16°F 99% 1017 mb
Low level cloud: 100%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
Sun 16
Feb		00:00

NNW
NNW

 4 / 7 mph -24 / -36°F 100% 1032 mb
Low level cloud: 100%
Mid level cloud: 43%
High level cloud: 8%
Most Significant Cloud Type: low
100%
0.0 In
06:00

S
S

 4 / 8 mph -25 / -38°F 100% 1021 mb
Low level cloud: 100%
Mid level cloud: 83%
High level cloud: 18%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NNW
NNW

 6 / 9 mph -15 / -30°F 95% 1031 mb
Low level cloud: 100%
Mid level cloud: 67%
High level cloud: 12%
Most Significant Cloud Type: low
100%
0.0 In
18:00

N
N

 2 / 4 mph -14 / -14°F 98% 1024 mb
Low level cloud: 81%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
86%
0.0 In
Mon 17
Feb		00:00

NNW
NNW

 6 / 13 mph -21 / -37°F 100% 1029 mb
Low level cloud: 100%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NNW
NNW

 9 / 18 mph -16 / -34°F 99% 1028 mb
Low level cloud: 100%
Mid level cloud: 6%
High level cloud: 80%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NNW
NNW

 4 / 7 mph -21 / -33°F 100% 1027 mb
Low level cloud: 100%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NNW
NNW

 16 / 23 mph -4 / -26°F 96% 1030 mb
Low level cloud: 100%
Mid level cloud: 1%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Tue 18
Feb		00:00

N
N

 1 / 2 mph -35 / -35°F 100% 1025 mb
Low level cloud: 100%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NNW
NNW

 13 / 26 mph -17 / -39°F 97% 1031 mb
Low level cloud: 100%
Mid level cloud: 21%
High level cloud: 21%
Most Significant Cloud Type: low
100%
0.0 In
12:00

S
S

 3 / 6 mph -31 / -42°F 100% 1025 mb
Low level cloud: 100%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
18:00

N
N

 8 / 9 mph -10 / -26°F 97% 1030 mb
Low level cloud: 85%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
85%
0.0 In
Wed 19
Feb		00:00

S
S

 4 / 9 mph -39 / -54°F 100% 1026 mb
Low level cloud: 100%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NW
NW

 2 / 4 mph -35 / -43°F 100% 1031 mb
Low level cloud: 100%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
12:00

S
S

 4 / 9 mph -31 / -46°F 98% 1029 mb
Low level cloud: 100%
Mid level cloud: 11%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

N
N

 4 / 8 mph -21 / -33°F 98% 1030 mb
Low level cloud: 78%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
78%
0.0 In
Thu 20
Feb		00:00

N
N

 2 / 5 mph -32 / -40°F 100% 1030 mb
Low level cloud: 86%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
06:00

N
N

 2 / 5 mph -33 / -43°F 100% 1030 mb
Low level cloud: 100%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NNE
NNE

 3 / 4 mph -19 / -27°F 94% 1031 mb
Low level cloud: 93%
Mid level cloud: 49%
High level cloud: 81%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NNW
NNW

 11 / 19 mph -18 / -40°F 96% 1028 mb
Low level cloud: 100%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
100%
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