Fast Forecast

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Kalakan 14 Day Long Range Forecast

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

Russia

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

The outlook for Kalakan in the two weeks ahead shows the average daytime maximum temperature will be around 14°C, with a high for the two weeks of 21°C expected on the evening of Sunday 11th. The mean minimum temperature will be 0°C, dipping to its lowest on the morning of Wednesday 14th at -7°C. Expect the following 14 days ahead to have mostly dry days although Tuesday 13th and Saturday 10th are likely to see a significant amount of rain or sleet. Current predictions suggest Tuesday 13th will have the most precipitation with an accumulation of around 8.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 09
May		22:00

W
W

 3 / 6 mph 48 / 47°F 50% 1005 mb
Low level cloud: 0%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: medium
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 10
May		01:00

SSW
SSW

 3 / 6 mph 45 / 44°F 57% 1003 mb
Low level cloud: 0%
Mid level cloud: 48%
High level cloud: 98%
Most Significant Cloud Type: medium
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

 6 / 13 mph 46 / 42°F 57% 999 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
07:00

WSW
WSW

 8 / 14 mph 49 / 45°F 54% 996 mb
Low level cloud: 0%
Mid level cloud: 61%
High level cloud: 100%
Most Significant Cloud Type: medium
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNW
NNW

 11 / 13 mph 59 / 56°F 48% 996 mb
Low level cloud: 0%
Mid level cloud: 36%
High level cloud: 0%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNW
NNW

 15 / 17 mph 59 / 55°F 29% 997 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
16:00

NNW
NNW

 13 / 15 mph 58 / 55°F 25% 999 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

 11 / 13 mph 56 / 53°F 26% 1000 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 4%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 3 / 6 mph 40 / 37°F 45% 1001 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 14%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 11
May		01:00

ESE
ESE

 0 / 0 mph 34 / 34°F 58% 1002 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 13%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

 2 / 5 mph 31 / 29°F 61% 1001 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 10%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ESE
ESE

 2 / 4 mph 31 / 31°F 61% 1000 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 32%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

 2 / 3 mph 50 / 50°F 39% 997 mb
Low level cloud: 0%
Mid level cloud: 53%
High level cloud: 98%
Most Significant Cloud Type: medium
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

 5 / 5 mph 63 / 60°F 29% 994 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 22%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

 6 / 7 mph 68 / 65°F 26% 991 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
19:00

NNE
NNE

 3 / 3 mph 69 / 66°F 27% 989 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 72%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 5 / 11 mph 48 / 46°F 49% 989 mb
Low level cloud: 0%
Mid level cloud: 99%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 12
May		01:00

NNE
NNE

 4 / 8 mph 46 / 45°F 51% 989 mb
Low level cloud: 0%
Mid level cloud: 68%
High level cloud: 100%
Most Significant Cloud Type: medium
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

 3 / 6 mph 45 / 44°F 57% 988 mb
Low level cloud: 0%
Mid level cloud: 61%
High level cloud: 100%
Most Significant Cloud Type: medium
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

N
N

 3 / 5 mph 46 / 45°F 64% 990 mb
Low level cloud: 0%
Mid level cloud: 92%
High level cloud: 6%
Most Significant Cloud Type: medium
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NW
NW

 5 / 6 mph 60 / 58°F 50% 991 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 13%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNW
NNW

 11 / 13 mph 63 / 62°F 32% 992 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 9%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNW
NNW

 11 / 12 mph 65 / 64°F 26% 994 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 2%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

 12 / 13 mph 59 / 56°F 34% 997 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

N
N

 6 / 11 mph 45 / 41°F 37% 1002 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 100%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 13
May		01:00

NNW
NNW

 4 / 9 mph 38 / 35°F 44% 1004 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 100%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNW
NNW

 4 / 9 mph 37 / 34°F 47% 1005 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNW
NNW

 4 / 6 mph 40 / 37°F 56% 1006 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNE
NNE

 6 / 7 mph 43 / 39°F 73% 1007 mb
Low level cloud: 50%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

N
N

 5 / 6 mph 40 / 36°F 92% 1007 mb
Low level cloud: 80%
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
16:00

N
N

 4 / 5 mph 41 / 38°F 95% 1007 mb
Low level cloud: 81%
Mid level cloud: 78%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

N
N

 4 / 5 mph 42 / 38°F 89% 1006 mb
Low level cloud: 69%
Mid level cloud: 57%
High level cloud: 0%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

 0 / 1 mph 36 / 36°F 91% 1006 mb
Low level cloud: 15%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 14
May		01:00

WNW
WNW

 1 / 2 mph 28 / 28°F 96% 1006 mb
Low level cloud: 46%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WNW
WNW

 2 / 5 mph 23 / 20°F 96% 1007 mb
Low level cloud: 42%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WNW
WNW

 2 / 5 mph 23 / 19°F 94% 1006 mb
Low level cloud: 29%
Mid level cloud: 6%
High level cloud: 14%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WNW
WNW

 3 / 4 mph 44 / 43°F 59% 1003 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 6%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

 4 / 4 mph 53 / 51°F 33% 1000 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 32%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

 2 / 2 mph 56 / 56°F 26% 998 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 100%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SW
SW

 3 / 3 mph 48 / 48°F 53% 999 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

 2 / 4 mph 37 / 37°F 72% 1001 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 15
May		01:00

N
N

 3 / 7 mph 33 / 30°F 77% 1002 mb
Low level cloud: 0%
Mid level cloud: 61%
High level cloud: 100%
Most Significant Cloud Type: medium
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNW
NNW

 4 / 8 mph 31 / 27°F 76% 1004 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 95%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NW
NW

 3 / 7 mph 29 / 25°F 71% 1006 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
10:00

NNW
NNW

 5 / 6 mph 47 / 44°F 45% 1005 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 21%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

N
N

 5 / 6 mph 56 / 53°F 26% 1003 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 7%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNW
NNW

 6 / 7 mph 57 / 54°F 21% 1002 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 6%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NW
NW

 6 / 6 mph 55 / 54°F 20% 1002 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

 2 / 5 mph 39 / 37°F 43% 1004 mb
Low level cloud: 0%
Mid level cloud: 55%
High level cloud: 5%
Most Significant Cloud Type: medium
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 16
May		04:00

WSW
WSW

 3 / 7 mph 30 / 27°F 72% 999 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 16%
Most Significant Cloud Type: medium
31%
0.0 In
10:00

W
W

 2 / 3 mph 51 / 52°F 78% 987 mb
Low level cloud: 3%
Mid level cloud: 54%
High level cloud: 100%
Most Significant Cloud Type: medium
65%
0.0 In
16:00

S
S

 6 / 12 mph 55 / 53°F 32% 996 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 86%
Most Significant Cloud Type: medium
100%
0.0 In
22:00

WNW
WNW

 3 / 7 mph 33 / 31°F 90% 997 mb
Low level cloud: 3%
Mid level cloud: 3%
High level cloud: 1%
Most Significant Cloud Type: low
4%
0.0 In
Sat 17
May		04:00

NW
NW

 5 / 10 mph 32 / 27°F 71% 997 mb
Low level cloud: 0%
Mid level cloud: 75%
High level cloud: 32%
Most Significant Cloud Type: medium
75%
0.0 In
10:00

N
N

 6 / 8 mph 49 / 47°F 47% 1004 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 100%
Most Significant Cloud Type: medium
16%
0.0 In
16:00

NNW
NNW

 5 / 8 mph 58 / 57°F 20% 1003 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 19%
Most Significant Cloud Type: medium
9%
0.0 In
22:00

NNE
NNE

 9 / 14 mph 41 / 36°F 53% 1006 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 11%
Most Significant Cloud Type: medium
45%
0.0 In
Sun 18
May		04:00

N
N

 3 / 7 mph 30 / 26°F 89% 1005 mb
Low level cloud: 5%
Mid level cloud: 67%
High level cloud: 0%
Most Significant Cloud Type: medium
82%
0.0 In
10:00

NW
NW

 9 / 13 mph 46 / 42°F 44% 1006 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 32%
Most Significant Cloud Type: medium
44%
0.0 In
16:00

N
N

 7 / 13 mph 57 / 56°F 25% 995 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.0 In
22:00

N
N

 5 / 10 mph 38 / 35°F 42% 1006 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 61%
Most Significant Cloud Type: medium
31%
0.0 In
Mon 19
May		04:00

NNW
NNW

 4 / 7 mph 29 / 25°F 67% 997 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 13%
Most Significant Cloud Type: medium
9%
0.0 In
10:00

NNW
NNW

 4 / 7 mph 49 / 47°F 43% 1010 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 9%
Most Significant Cloud Type: medium
17%
0.0 In
16:00

NNE
NNE

 10 / 17 mph 55 / 53°F 33% 994 mb
Low level cloud: 0%
Mid level cloud: 85%
High level cloud: 32%
Most Significant Cloud Type: medium
86%
0.0 In
22:00

NNW
NNW

 4 / 8 mph 41 / 39°F 45% 1011 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 32%
Most Significant Cloud Type: medium
17%
0.0 In
Tue 20
May		04:00

NW
NW

 4 / 8 mph 32 / 29°F 65% 1003 mb
Low level cloud: 0%
Mid level cloud: 98%
High level cloud: 21%
Most Significant Cloud Type: medium
99%
0.0 In
10:00

WNW
WNW

 2 / 3 mph 53 / 54°F 39% 1015 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 33%
Most Significant Cloud Type: medium
7%
0.0 In
16:00

N
N

 8 / 15 mph 52 / 49°F 41% 1005 mb
Low level cloud: 0%
Mid level cloud: 50%
High level cloud: 100%
Most Significant Cloud Type: medium
53%
0.0 In
22:00

NW
NW

 2 / 3 mph 46 / 46°F 41% 1011 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 13%
Most Significant Cloud Type: medium
44%
0.0 In
Wed 21
May		04:00

WNW
WNW

 5 / 9 mph 37 / 34°F 59% 1011 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
10:00

SSE
SSE

 2 / 4 mph 56 / 56°F 37% 1011 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 100%
Most Significant Cloud Type: medium
29%
0.0 In
16:00

N
N

 7 / 12 mph 54 / 53°F 38% 1010 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
22:00

SE
SE

 3 / 5 mph 50 / 50°F 51% 1008 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 32%
Most Significant Cloud Type: medium
31%
0.0 In
Thu 22
May		04:00

NNW
NNW

 3 / 7 mph 32 / 28°F 73% 1017 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 78%
Most Significant Cloud Type: medium
29%
0.0 In
10:00

ENE
ENE

 2 / 3 mph 61 / 61°F 44% 1010 mb
Low level cloud: 0%
Mid level cloud: 58%
High level cloud: 100%
Most Significant Cloud Type: medium
62%
0.0 In
16:00

NNE
NNE

 9 / 16 mph 57 / 55°F 48% 1013 mb
Low level cloud: 0%
Mid level cloud: 57%
High level cloud: 40%
Most Significant Cloud Type: medium
58%
0.0 In
22:00

NE
NE

 2 / 5 mph 51 / 51°F 64% 1009 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 33%
Most Significant Cloud Type: medium
46%
0.0 In
Fri 23
May		04:00

NNW
NNW

 2 / 3 mph 39 / 39°F 87% 1017 mb
Low level cloud: 18%
Mid level cloud: 63%
High level cloud: 16%
Most Significant Cloud Type: medium
100%
0.0 In
10:00

E
E

 1 / 1 mph 55 / 55°F 75% 1011 mb
Low level cloud: 0%
Mid level cloud: 65%
High level cloud: 33%
Most Significant Cloud Type: medium
66%
0.0 In
16:00

ENE
ENE

 6 / 13 mph 51 / 49°F 68% 1013 mb
Low level cloud: 33%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
22:00

SE
SE

 3 / 6 mph 50 / 50°F 83% 1011 mb
Low level cloud: 0%
Mid level cloud: 55%
High level cloud: 12%
Most Significant Cloud Type: medium
55%
0.1 In
Sat 24
May		04:00

W
W

 1 / 3 mph 34 / 34°F 97% 1015 mb
Low level cloud: 54%
Mid level cloud: 22%
High level cloud: 93%
Most Significant Cloud Type: low
73%
0.1 In
10:00

NE
NE

 1 / 2 mph 51 / 51°F 93% 1011 mb
Low level cloud: 80%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
16:00

N
N

 4 / 9 mph 61 / 61°F 31% 1008 mb
Low level cloud: 0%
Mid level cloud: 68%
High level cloud: 100%
Most Significant Cloud Type: medium
71%
0.0 In
22:00

ENE
ENE

 5 / 11 mph 49 / 46°F 89% 1008 mb
Low level cloud: 8%
Mid level cloud: 12%
High level cloud: 17%
Most Significant Cloud Type: low
14%
0.3 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