Fast Forecast

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Srednjaja Olekma 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Srednjaja Olekma

Russia

Long range weather outlook for Srednjaja Olekma includes 14 day forecast summary:

Taking a look at Srednjaja Olekma over the coming two weeks and the average daytime maximum temperature will be around 20°C, with a high for the two weeks of 28°C expected on the afternoon of Sunday 2nd. The mean minimum temperature will be 8°C, dipping to its lowest on the morning of Wednesday 29th at 2°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain. The indicators are that Thursday 6th will have the most precipitation with an accumulation of around 21.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 28
May		22:00

ENE
ENE

 2 / 4 mph 46 / 45°F 69% 1012 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 32%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 29
May		01:00

N
N

 0 / 1 mph 40 / 40°F 75% 1014 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 10%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NW
NW

 0 / 1 mph 37 / 37°F 82% 1015 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
07:00

W
W

 1 / 1 mph 41 / 40°F 76% 1015 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 2%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

 1 / 1 mph 60 / 59°F 49% 1013 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
13:00

ENE
ENE

 4 / 4 mph 67 / 65°F 37% 1012 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 3%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ESE
ESE

 7 / 8 mph 66 / 64°F 40% 1011 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 12%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ESE
ESE

 7 / 8 mph 67 / 65°F 40% 1011 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
22:00

SSE
SSE

 2 / 5 mph 49 / 49°F 69% 1013 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 5%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 30
May		01:00

SSW
SSW

 1 / 1 mph 43 / 43°F 75% 1016 mb
Low level cloud: 0%
Mid level cloud: 35%
High level cloud: 4%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

 1 / 3 mph 41 / 40°F 81% 1017 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 2%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 2 / 4 mph 46 / 45°F 74% 1018 mb
Low level cloud: 0%
Mid level cloud: 55%
High level cloud: 0%
Most Significant Cloud Type: medium
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 1 / 1 mph 59 / 58°F 57% 1017 mb
Low level cloud: 0%
Mid level cloud: 92%
High level cloud: 0%
Most Significant Cloud Type: medium
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSE
SSE

 1 / 2 mph 73 / 70°F 37% 1016 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
16:00

ESE
ESE

 0 / 0 mph 76 / 74°F 33% 1015 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WNW
WNW

 0 / 0 mph 73 / 74°F 34% 1014 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
22:00

S
S

 1 / 2 mph 55 / 53°F 59% 1015 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 5%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 31
May		01:00

NW
NW

 0 / 1 mph 47 / 47°F 65% 1017 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WNW
WNW

 1 / 2 mph 44 / 44°F 73% 1018 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
07:00

W
W

 1 / 3 mph 48 / 47°F 72% 1018 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
10:00

W
W

 2 / 2 mph 68 / 65°F 48% 1017 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 31%
Most Significant Cloud Type: high
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

N
N

 1 / 2 mph 78 / 76°F 34% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 17%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

E
E

 4 / 4 mph 80 / 77°F 30% 1014 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 21%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ENE
ENE

 4 / 5 mph 80 / 77°F 35% 1013 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 49%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

N
N

 2 / 4 mph 64 / 61°F 57% 1014 mb
Low level cloud: 0%
Mid level cloud: 52%
High level cloud: 33%
Most Significant Cloud Type: medium
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 01
Jun		01:00

N
N

 3 / 7 mph 55 / 56°F 63% 1015 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 30%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

 3 / 7 mph 52 / 52°F 67% 1016 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 19%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNW
NNW

 2 / 4 mph 55 / 54°F 72% 1017 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 12%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNE
NNE

 3 / 3 mph 73 / 69°F 52% 1016 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 7%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NE
NE

 4 / 5 mph 81 / 77°F 35% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 8%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNE
NNE

 5 / 6 mph 81 / 77°F 36% 1013 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 13%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NE
NE

 5 / 5 mph 80 / 77°F 37% 1013 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 11%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

 2 / 5 mph 62 / 60°F 66% 1013 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 10%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 02
Jun		01:00

N
N

 1 / 3 mph 54 / 54°F 71% 1014 mb
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 35%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

 3 / 6 mph 52 / 52°F 81% 1015 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 14%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

N
N

 1 / 3 mph 56 / 54°F 81% 1014 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 35%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNE
NNE

 1 / 1 mph 74 / 70°F 59% 1013 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 17%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNE
NNE

 1 / 1 mph 83 / 78°F 41% 1011 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
16:00

NE
NE

 6 / 7 mph 68 / 65°F 75% 1011 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 41%
Most Significant Cloud Type: medium
47%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

S
S

 3 / 6 mph 55 / 53°F 93% 1012 mb
Low level cloud: 26%
Mid level cloud: 45%
High level cloud: 85%
Most Significant Cloud Type: low
51%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
22:00

NNW
NNW

 3 / 5 mph 54 / 52°F 95% 1013 mb
Low level cloud: 27%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 03
Jun		01:00

N
N

 1 / 3 mph 51 / 51°F 93% 1013 mb
Low level cloud: 17%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

 1 / 2 mph 49 / 49°F 95% 1012 mb
Low level cloud: 26%
Mid level cloud: 50%
High level cloud: 33%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 2 / 3 mph 54 / 52°F 94% 1013 mb
Low level cloud: 37%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

 4 / 4 mph 64 / 61°F 80% 1012 mb
Low level cloud: 28%
Mid level cloud: 46%
High level cloud: 63%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

E
E

 5 / 6 mph 61 / 61°F 79% 1011 mb
Low level cloud: 84%
Mid level cloud: 92%
High level cloud: 73%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ENE
ENE

 7 / 9 mph 67 / 65°F 69% 1010 mb
Low level cloud: 54%
Mid level cloud: 45%
High level cloud: 5%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

E
E

 9 / 10 mph 67 / 64°F 66% 1009 mb
Low level cloud: 23%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

 7 / 13 mph 52 / 48°F 91% 1010 mb
Low level cloud: 16%
Mid level cloud: 20%
High level cloud: 16%
Most Significant Cloud Type: low
24%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 04
Jun		04:00

E
E

 3 / 5 mph 51 / 51°F 90% 1012 mb
Low level cloud: 95%
Mid level cloud: 100%
High level cloud: 6%
Most Significant Cloud Type: low
100%
0.0 In
10:00

NE
NE

 4 / 9 mph 52 / 51°F 94% 1015 mb
Low level cloud: 98%
Mid level cloud: 88%
High level cloud: 18%
Most Significant Cloud Type: low
100%
0.0 In
16:00

NE
NE

 7 / 12 mph 62 / 62°F 65% 1013 mb
Low level cloud: 0%
Mid level cloud: 60%
High level cloud: 0%
Most Significant Cloud Type: medium
60%
0.0 In
22:00

ENE
ENE

 4 / 9 mph 56 / 56°F 74% 1012 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
0.0 In
Wed 05
Jun		04:00

ESE
ESE

 3 / 6 mph 52 / 52°F 55% 1011 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
0.0 In
10:00

SSW
SSW

 3 / 5 mph 70 / 70°F 60% 1007 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 4%
Most Significant Cloud Type: medium
5%
0.0 In
16:00

E
E

 4 / 8 mph 71 / 71°F 54% 1001 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 22%
Most Significant Cloud Type: medium
45%
0.0 In
22:00

NE
NE

 7 / 14 mph 54 / 52°F 97% 997 mb
Low level cloud: 98%
Mid level cloud: 68%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Thu 06
Jun		04:00

NE
NE

 3 / 6 mph 52 / 52°F 98% 998 mb
Low level cloud: 80%
Mid level cloud: 39%
High level cloud: 7%
Most Significant Cloud Type: low
94%
0.4 In
10:00

S
S

 3 / 7 mph 53 / 53°F 84% 995 mb
Low level cloud: 37%
Mid level cloud: 43%
High level cloud: 4%
Most Significant Cloud Type: low
52%
0.7 In
16:00

NNE
NNE

 2 / 5 mph 57 / 58°F 99% 996 mb
Low level cloud: 84%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.4 In
22:00

SW
SW

 2 / 4 mph 44 / 44°F 94% 1008 mb
Low level cloud: 22%
Mid level cloud: 54%
High level cloud: 95%
Most Significant Cloud Type: low
52%
0.1 In
Fri 07
Jun		04:00

N
N

 3 / 6 mph 48 / 48°F 96% 1002 mb
Low level cloud: 60%
Mid level cloud: 85%
High level cloud: 1%
Most Significant Cloud Type: low
90%
1.1 In
10:00

SSW
SSW

 3 / 6 mph 55 / 55°F 76% 1014 mb
Low level cloud: 17%
Mid level cloud: 10%
High level cloud: 96%
Most Significant Cloud Type: low
31%
0.0 In
16:00

N
N

 5 / 11 mph 52 / 50°F 73% 1008 mb
Low level cloud: 57%
Mid level cloud: 100%
High level cloud: 74%
Most Significant Cloud Type: low
100%
0.2 In
22:00

SSE
SSE

 5 / 10 mph 51 / 50°F 75% 1009 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 14%
Most Significant Cloud Type: medium
45%
0.0 In
Sat 08
Jun		04:00

W
W

 2 / 4 mph 37 / 36°F 94% 1013 mb
Low level cloud: 13%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
20%
0.0 In
10:00

S
S

 2 / 4 mph 54 / 54°F 81% 1008 mb
Low level cloud: 3%
Mid level cloud: 60%
High level cloud: 22%
Most Significant Cloud Type: medium
68%
0.0 In
16:00

WNW
WNW

 4 / 8 mph 62 / 62°F 49% 1011 mb
Low level cloud: 0%
Mid level cloud: 56%
High level cloud: 8%
Most Significant Cloud Type: medium
55%
0.0 In
22:00

ENE
ENE

 9 / 20 mph 52 / 49°F 85% 1007 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 13%
Most Significant Cloud Type: medium
44%
0.0 In
Sun 09
Jun		04:00

NW
NW

 1 / 2 mph 38 / 38°F 93% 1016 mb
Low level cloud: 9%
Mid level cloud: 10%
High level cloud: 3%
Most Significant Cloud Type: low
12%
0.1 In
10:00

WSW
WSW

 2 / 4 mph 61 / 61°F 63% 1008 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 60%
Most Significant Cloud Type: medium
21%
0.0 In
16:00

SW
SW

 5 / 10 mph 65 / 65°F 48% 1010 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 86%
Most Significant Cloud Type: medium
29%
0.0 In
22:00

SSE
SSE

 4 / 8 mph 56 / 56°F 70% 1003 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 7%
Most Significant Cloud Type: medium
7%
0.0 In
Mon 10
Jun		04:00

NE
NE

 1 / 2 mph 43 / 43°F 93% 1009 mb
Low level cloud: 12%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
20%
0.0 In
10:00

WNW
WNW

 3 / 7 mph 62 / 62°F 63% 999 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
0.0 In
16:00

W
W

 5 / 11 mph 69 / 69°F 46% 1003 mb
Low level cloud: 0%
Mid level cloud: 62%
High level cloud: 66%
Most Significant Cloud Type: medium
64%
0.0 In
22:00

ENE
ENE

 8 / 17 mph 52 / 50°F 80% 1000 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
0.1 In
Tue 11
Jun		04:00

ENE
ENE

 2 / 4 mph 45 / 45°F 91% 1004 mb
Low level cloud: 6%
Mid level cloud: 74%
High level cloud: 35%
Most Significant Cloud Type: medium
91%
0.0 In
10:00

S
S

 2 / 5 mph 62 / 62°F 55% 1001 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
16:00

N
N

 1 / 3 mph 68 / 67°F 54% 1003 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 32%
Most Significant Cloud Type: medium
29%
0.0 In
22:00

NE
NE

 4 / 9 mph 53 / 52°F 73% 1004 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 2%
Most Significant Cloud Type: medium
19%
0.0 In
Wed 12
Jun		04:00

NE
NE

 0 / 1 mph 43 / 43°F 85% 1008 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 6%
Most Significant Cloud Type: medium
9%
0.0 In
10:00

SW
SW

 0 / 1 mph 61 / 61°F 61% 1010 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 94%
Most Significant Cloud Type: medium
16%
0.0 In
16:00

ENE
ENE

 3 / 6 mph 72 / 75°F 40% 1005 mb
Low level cloud: 0%
Mid level cloud: 53%
High level cloud: 13%
Most Significant Cloud Type: medium
53%
0.0 In
22:00

ESE
ESE

 2 / 3 mph 55 / 55°F 73% 1009 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 33%
Most Significant Cloud Type: medium
14%
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