WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Vyerkhnyadvinsk 14 Day Long Range Forecast

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

Belarus

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

Over the next 14 days the Vyerkhnyadvinsk forecast suggests the average daytime maximum temperature will be around 18°C, with a high for the two weeks of 23°C expected on the afternoon of Monday 6th. The average minimum temperature will be 7°C, dipping to its lowest on the morning of Thursday 9th at 1°C. The coming 14 days will remain predominantly dry. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Mon 29
Apr
20:00

S
S

8 / 17 mph 58 / 56°F 72% 1031 mb
Low level cloud: 0%
Mid level cloud: 99%
High level cloud: 86%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

S
S

10 / 19 mph 55 / 53°F 76% 1031 mb
Low level cloud: 0%
Mid level cloud: 72%
High level cloud: 100%
Most Significant Cloud Type: medium
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 30
Apr
02:00

SSW
SSW

11 / 19 mph 54 / 50°F 76% 1032 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
05:00

SSW
SSW

10 / 19 mph 52 / 48°F 75% 1032 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 100%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

SW
SW

12 / 15 mph 58 / 55°F 66% 1032 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 40%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

SW
SW

12 / 14 mph 65 / 65°F 51% 1031 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 59%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

SW
SW

11 / 13 mph 68 / 67°F 47% 1030 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 100%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

SW
SW

8 / 12 mph 66 / 65°F 57% 1029 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 100%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

SW
SW

6 / 12 mph 58 / 55°F 72% 1029 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

SW
SW

6 / 12 mph 53 / 52°F 77% 1029 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 01
May
02:00

WSW
WSW

4 / 9 mph 51 / 49°F 82% 1028 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

SW
SW

3 / 6 mph 49 / 49°F 84% 1027 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

SSW
SSW

2 / 3 mph 58 / 59°F 68% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

SSW
SSW

4 / 5 mph 68 / 65°F 54% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 52%
Most Significant Cloud Type: high
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

SW
SW

3 / 4 mph 71 / 68°F 44% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 37%
Most Significant Cloud Type: high
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

WSW
WSW

1 / 1 mph 69 / 68°F 46% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 85%
Most Significant Cloud Type: high
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

ENE
ENE

5 / 11 mph 59 / 57°F 70% 1022 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
23:00

E
E

6 / 13 mph 52 / 50°F 88% 1023 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 11%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 02
May
02:00

E
E

6 / 12 mph 49 / 47°F 84% 1022 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 7%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

E
E

6 / 12 mph 48 / 45°F 82% 1021 mb
Low level cloud: 1%
Mid level cloud: 17%
High level cloud: 1%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

E
E

8 / 10 mph 58 / 55°F 61% 1021 mb
Low level cloud: 9%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

ENE
ENE

9 / 10 mph 62 / 60°F 55% 1020 mb
Low level cloud: 16%
Mid level cloud: 32%
High level cloud: 17%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

E
E

6 / 6 mph 65 / 63°F 49% 1019 mb
Low level cloud: 3%
Mid level cloud: 28%
High level cloud: 6%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

NE
NE

5 / 7 mph 67 / 64°F 49% 1017 mb
Low level cloud: 4%
Mid level cloud: 42%
High level cloud: 1%
Most Significant Cloud Type: medium
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

NE
NE

9 / 17 mph 56 / 52°F 60% 1018 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 17%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

ENE
ENE

7 / 15 mph 48 / 44°F 77% 1019 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 03
May
02:00

ENE
ENE

6 / 13 mph 44 / 40°F 82% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 8%
Most Significant Cloud Type: high
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

ENE
ENE

5 / 10 mph 42 / 39°F 79% 1019 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 100%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

E
E

8 / 9 mph 52 / 48°F 60% 1018 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 2%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

E
E

6 / 8 mph 60 / 58°F 44% 1018 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 1%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

ESE
ESE

5 / 6 mph 64 / 62°F 38% 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
17:00

SE
SE

3 / 4 mph 64 / 63°F 40% 1016 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
20:00

SSE
SSE

2 / 4 mph 55 / 55°F 59% 1016 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 3%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

S
S

4 / 8 mph 48 / 47°F 71% 1016 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 2%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 04
May
02:00

SSW
SSW

4 / 8 mph 46 / 45°F 76% 1016 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 11%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

SSW
SSW

4 / 9 mph 45 / 43°F 80% 1016 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 5%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

SW
SW

4 / 6 mph 57 / 55°F 65% 1016 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 16%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

SW
SW

5 / 6 mph 66 / 64°F 49% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 12%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

WSW
WSW

6 / 7 mph 69 / 67°F 41% 1014 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 6%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

WNW
WNW

5 / 7 mph 71 / 68°F 45% 1013 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 2%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

WSW
WSW

3 / 7 mph 60 / 59°F 63% 1013 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 16%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

W
W

5 / 11 mph 55 / 54°F 74% 1013 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 27%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 05
May
02:00

W
W

5 / 11 mph 52 / 51°F 84% 1013 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
05:00

W
W

5 / 10 mph 53 / 52°F 88% 1012 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 5%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

NW
NW

6 / 7 mph 62 / 59°F 77% 1012 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 9%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

NW
NW

9 / 10 mph 70 / 68°F 51% 1012 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

NW
NW

10 / 12 mph 72 / 75°F 42% 1011 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 3%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

N
N

7 / 11 mph 70 / 68°F 48% 1011 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 7%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

ENE
ENE

6 / 12 mph 58 / 56°F 72% 1012 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 3%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

E
E

6 / 11 mph 53 / 51°F 85% 1013 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 1%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Mon 06
May
02:00

SSE
SSE

7 / 14 mph 46 / 42°F 88% 1012 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: medium
35%
0.0 In
08:00

SSW
SSW

6 / 10 mph 59 / 58°F 74% 1012 mb
Low level cloud: 0%
Mid level cloud: 51%
High level cloud: 0%
Most Significant Cloud Type: medium
51%
0.0 In
14:00

NNW
NNW

3 / 5 mph 61 / 61°F 51% 1015 mb
Low level cloud: 44%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
46%
0.0 In
20:00

NE
NE

5 / 9 mph 50 / 48°F 62% 1009 mb
Low level cloud: 33%
Mid level cloud: 44%
High level cloud: 6%
Most Significant Cloud Type: low
48%
0.0 In
Tue 07
May
02:00

SW
SW

3 / 5 mph 55 / 56°F 99% 1008 mb
Low level cloud: 65%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
08:00

SSE
SSE

9 / 13 mph 60 / 60°F 73% 1021 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 37%
Most Significant Cloud Type: medium
24%
0.0 In
14:00

NW
NW

7 / 13 mph 71 / 71°F 47% 1019 mb
Low level cloud: 1%
Mid level cloud: 68%
High level cloud: 3%
Most Significant Cloud Type: medium
71%
0.0 In
20:00

NE
NE

13 / 26 mph 48 / 42°F 92% 1009 mb
Low level cloud: 95%
Mid level cloud: 48%
High level cloud: 30%
Most Significant Cloud Type: low
100%
0.0 In
Wed 08
May
02:00

NNW
NNW

4 / 10 mph 52 / 51°F 86% 1022 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 10%
Most Significant Cloud Type: medium
25%
0.0 In
08:00

NNE
NNE

16 / 31 mph 40 / 31°F 84% 1013 mb
Low level cloud: 79%
Mid level cloud: 98%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
14:00

SW
SW

7 / 13 mph 70 / 70°F 52% 1020 mb
Low level cloud: 1%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
0.0 In
20:00

NNE
NNE

11 / 22 mph 42 / 35°F 56% 1016 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
0.0 In
Thu 09
May
02:00

NW
NW

8 / 15 mph 52 / 49°F 96% 1018 mb
Low level cloud: 37%
Mid level cloud: 19%
High level cloud: 5%
Most Significant Cloud Type: low
44%
0.2 In
08:00

N
N

16 / 30 mph 42 / 34°F 52% 1017 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
14:00

N
N

10 / 21 mph 59 / 59°F 31% 1021 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 71%
Most Significant Cloud Type: medium
10%
0.0 In
20:00

N
N

7 / 15 mph 41 / 36°F 56% 1017 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
Fri 10
May
02:00

W
W

4 / 8 mph 43 / 41°F 67% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 20%
Most Significant Cloud Type: high
19%
0.0 In
08:00

NE
NE

5 / 9 mph 42 / 39°F 44% 1017 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 32%
Most Significant Cloud Type: medium
23%
0.0 In
14:00

SW
SW

12 / 24 mph 61 / 62°F 52% 1009 mb
Low level cloud: 11%
Mid level cloud: 66%
High level cloud: 84%
Most Significant Cloud Type: medium
100%
0.0 In
20:00

N
N

2 / 3 mph 45 / 45°F 52% 1012 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 53%
Most Significant Cloud Type: medium
100%
0.0 In
Sat 11
May
02:00

NW
NW

11 / 22 mph 43 / 37°F 72% 1007 mb
Low level cloud: 0%
Mid level cloud: 60%
High level cloud: 100%
Most Significant Cloud Type: medium
63%
0.0 In
08:00

ENE
ENE

14 / 28 mph 37 / 28°F 74% 1008 mb
Low level cloud: 40%
Mid level cloud: 44%
High level cloud: 21%
Most Significant Cloud Type: low
57%
0.0 In
14:00

WNW
WNW

17 / 35 mph 53 / 48°F 42% 1007 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
0.0 In
20:00

NE
NE

4 / 8 mph 40 / 37°F 79% 1006 mb
Low level cloud: 0%
Mid level cloud: 76%
High level cloud: 9%
Most Significant Cloud Type: medium
75%
0.1 In
Sun 12
May
02:00

WNW
WNW

7 / 15 mph 34 / 28°F 90% 1012 mb
Low level cloud: 32%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
38%
0.0 In
08:00

N
N

7 / 14 mph 42 / 38°F 45% 1014 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 2%
Most Significant Cloud Type: medium
7%
0.0 In
14:00

W
W

11 / 23 mph 54 / 51°F 41% 1013 mb
Low level cloud: 0%
Mid level cloud: 39%
High level cloud: 66%
Most Significant Cloud Type: medium
41%
0.0 In
20:00

WSW
WSW

5 / 10 mph 45 / 42°F 65% 1019 mb
Low level cloud: 6%
Mid level cloud: 55%
High level cloud: 16%
Most Significant Cloud Type: medium
73%
0.0 In
Mon 13
May
02:00

WSW
WSW

20 / 42 mph 48 / 40°F 90% 1002 mb
Low level cloud: 100%
Mid level cloud: 99%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
08:00

WSW
WSW

4 / 8 mph 48 / 47°F 63% 1022 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 4%
Most Significant Cloud Type: medium
13%
0.0 In
14:00

W
W

15 / 31 mph 54 / 50°F 82% 1002 mb
Low level cloud: 91%
Mid level cloud: 64%
High level cloud: 9%
Most Significant Cloud Type: low
100%
0.0 In
20:00

ESE
ESE

2 / 5 mph 49 / 49°F 60% 1020 mb
Low level cloud: 0%
Mid level cloud: 53%
High level cloud: 0%
Most Significant Cloud Type: medium
53%
0.0 In
Tue 14
May
02:00

WNW
WNW

6 / 13 mph 38 / 33°F 95% 1008 mb
Low level cloud: 7%
Mid level cloud: 4%
High level cloud: 3%
Most Significant Cloud Type: low
9%
0.0 In
08:00

ENE
ENE

9 / 18 mph 51 / 47°F 60% 1018 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 36%
Most Significant Cloud Type: medium
10%
0.0 In
14:00

E
E

2 / 5 mph 54 / 55°F 59% 1010 mb
Low level cloud: 5%
Mid level cloud: 7%
High level cloud: 32%
Most Significant Cloud Type: low
10%
0.0 In
20:00

E
E

11 / 21 mph 50 / 46°F 68% 1012 mb
Low level cloud: 53%
Mid level cloud: 71%
High level cloud: 92%
Most Significant Cloud Type: low
88%
0.0 In

Other Locations Near to Vyerkhnyadvinsk

Cities and Towns: Dagda, Russia

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