WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Point Pleasant 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Point Pleasant

West Virginia, United States Of America

Long range weather outlook for Point Pleasant includes 14 day forecast summary:

The next 14 day outlook for Point Pleasant shows the average daytime maximum temperature will be around 25°C, with a high for the two weeks of 30°C expected on the afternoon of Sunday 26th. The average minimum temperature will be 12°C, dipping to its lowest on the morning of Friday 31st at 5°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. Current predictions suggest Monday 27th will have the most precipitation with an accumulation of around 17.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sat 25
May
01:00

S
S

4 / 8 mph 63 / 63°F 94% 1011 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 32%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

4 / 9 mph 60 / 60°F 96% 1011 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 11%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

5 / 8 mph 69 / 66°F 86% 1011 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 40%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

6 / 7 mph 84 / 82°F 54% 1011 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

8 / 9 mph 86 / 86°F 46% 1009 mb
Low level cloud: 0%
Mid level cloud: 92%
High level cloud: 16%
Most Significant Cloud Type: medium
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

1 / 1 mph 85 / 84°F 63% 1009 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 33%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

2 / 5 mph 75 / 76°F 82% 1010 mb
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 100%
Most Significant Cloud Type: medium
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNW
NNW

4 / 9 mph 64 / 64°F 97% 1012 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 6%
Most Significant Cloud Type: medium
14%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Sun 26
May
19:00

ESE
ESE

4 / 7 mph 68 / 65°F 96% 1008 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 30%
Most Significant Cloud Type: medium
19%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

W
W

8 / 12 mph 64 / 64°F 99% 1007 mb
Low level cloud: 78%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.5 In of precipitation over the past 3 hours.
0.5 In
Mon 27
May
01:00

S
S

8 / 13 mph 62 / 62°F 98% 1007 mb
Low level cloud: 47%
Mid level cloud: 19%
High level cloud: 100%
Most Significant Cloud Type: low
66%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
04:00

S
S

8 / 13 mph 62 / 62°F 98% 1005 mb
Low level cloud: 85%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

14 / 22 mph 66 / 65°F 96% 1003 mb
Low level cloud: 51%
Mid level cloud: 14%
High level cloud: 100%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

15 / 18 mph 76 / 79°F 74% 1004 mb
Low level cloud: 91%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

13 / 19 mph 73 / 76°F 90% 1005 mb
Low level cloud: 55%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

11 / 17 mph 75 / 77°F 91% 1006 mb
Low level cloud: 17%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
19%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

W
W

8 / 14 mph 69 / 67°F 94% 1008 mb
Low level cloud: 15%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

WNW
WNW

8 / 13 mph 62 / 62°F 95% 1011 mb
Low level cloud: 18%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 28
May
01:00

SW
SW

4 / 8 mph 56 / 56°F 98% 1011 mb
Low level cloud: 20%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

5 / 11 mph 54 / 53°F 98% 1012 mb
Low level cloud: 25%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

8 / 11 mph 63 / 60°F 96% 1013 mb
Low level cloud: 51%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

13 / 15 mph 74 / 76°F 56% 1012 mb
Low level cloud: 14%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

14 / 16 mph 79 / 78°F 41% 1012 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

12 / 15 mph 77 / 77°F 48% 1011 mb
Low level cloud: 0%
Mid level cloud: 51%
High level cloud: 0%
Most Significant Cloud Type: medium
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

13 / 21 mph 65 / 64°F 76% 1012 mb
Low level cloud: 1%
Mid level cloud: 6%
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

W
W

11 / 17 mph 58 / 56°F 74% 1014 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 29
May
01:00

W
W

8 / 13 mph 53 / 50°F 85% 1015 mb
Low level cloud: 27%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

7 / 10 mph 54 / 52°F 83% 1016 mb
Low level cloud: 54%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WNW
WNW

8 / 9 mph 56 / 52°F 83% 1018 mb
Low level cloud: 55%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WNW
WNW

9 / 11 mph 65 / 64°F 60% 1018 mb
Low level cloud: 99%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

9 / 11 mph 68 / 66°F 61% 1018 mb
Low level cloud: 38%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NW
NW

7 / 9 mph 69 / 67°F 59% 1017 mb
Low level cloud: 18%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NW
NW

6 / 12 mph 59 / 57°F 81% 1018 mb
Low level cloud: 11%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WNW
WNW

3 / 6 mph 55 / 56°F 85% 1019 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 30
May
01:00

NNE
NNE

3 / 6 mph 47 / 46°F 89% 1021 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 1%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

3 / 6 mph 44 / 44°F 89% 1021 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
07:00

NNW
NNW

3 / 4 mph 52 / 51°F 80% 1023 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 8%
Most Significant Cloud Type: high
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNW
NNW

4 / 5 mph 67 / 64°F 48% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 19%
Most Significant Cloud Type: high
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NW
NW

6 / 7 mph 73 / 69°F 37% 1020 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 4%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NW
NW

10 / 11 mph 72 / 75°F 39% 1019 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNW
NNW

6 / 12 mph 62 / 60°F 64% 1019 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

8 / 16 mph 53 / 50°F 70% 1021 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 31
May
01:00

NE
NE

5 / 10 mph 47 / 44°F 85% 1022 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
04:00

NNE
NNE

3 / 7 mph 43 / 41°F 90% 1023 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
07:00

N
N

4 / 5 mph 49 / 47°F 67% 1025 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
10:00

NNE
NNE

6 / 8 mph 63 / 60°F 41% 1023 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
13:00

N
N

5 / 6 mph 71 / 68°F 33% 1023 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

N
N

6 / 7 mph 74 / 74°F 35% 1021 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

4 / 9 mph 63 / 60°F 67% 1022 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

5 / 10 mph 54 / 53°F 82% 1023 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
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sat 01
Jun
01:00

S
S

7 / 14 mph 66 / 66°F 97% 1016 mb
Low level cloud: 33%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
07:00

S
S

4 / 8 mph 57 / 57°F 61% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 90%
Most Significant Cloud Type: high
90%
0.0 In
13:00

NNW
NNW

4 / 8 mph 78 / 78°F 45% 1018 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 74%
Most Significant Cloud Type: medium
47%
0.0 In
19:00

W
W

5 / 11 mph 72 / 76°F 69% 1016 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.0 In
Sun 02
Jun
01:00

ENE
ENE

5 / 11 mph 51 / 50°F 74% 1019 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 15%
Most Significant Cloud Type: medium
4%
0.0 In
07:00

SSW
SSW

4 / 9 mph 66 / 66°F 70% 1022 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 4%
Most Significant Cloud Type: medium
11%
0.0 In
13:00

S
S

2 / 5 mph 80 / 80°F 40% 1021 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 81%
Most Significant Cloud Type: high
81%
0.0 In
19:00

WNW
WNW

8 / 16 mph 64 / 64°F 81% 1019 mb
Low level cloud: 0%
Mid level cloud: 53%
High level cloud: 13%
Most Significant Cloud Type: medium
53%
0.0 In
Mon 03
Jun
01:00

SSW
SSW

5 / 11 mph 60 / 60°F 98% 1018 mb
Low level cloud: 14%
Mid level cloud: 6%
High level cloud: 37%
Most Significant Cloud Type: low
100%
0.0 In
07:00

SSE
SSE

3 / 6 mph 60 / 60°F 99% 1019 mb
Low level cloud: 52%
Mid level cloud: 99%
High level cloud: 53%
Most Significant Cloud Type: low
93%
0.1 In
13:00

SW
SW

11 / 22 mph 70 / 70°F 73% 1015 mb
Low level cloud: 66%
Mid level cloud: 50%
High level cloud: 59%
Most Significant Cloud Type: low
90%
0.0 In
19:00

W
W

4 / 9 mph 70 / 70°F 87% 1016 mb
Low level cloud: 3%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
38%
0.0 In
Tue 04
Jun
01:00

S
S

3 / 7 mph 61 / 61°F 99% 1012 mb
Low level cloud: 56%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
62%
0.2 In
07:00

E
E

0 / 0 mph 69 / 69°F 92% 1018 mb
Low level cloud: 51%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
59%
0.0 In
13:00

N
N

4 / 8 mph 79 / 81°F 66% 1011 mb
Low level cloud: 56%
Mid level cloud: 26%
High level cloud: 32%
Most Significant Cloud Type: low
69%
0.0 In
19:00

WNW
WNW

4 / 8 mph 75 / 79°F 85% 1016 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
0.1 In
Wed 05
Jun
01:00

NNE
NNE

4 / 9 mph 60 / 60°F 98% 1012 mb
Low level cloud: 7%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
9%
0.3 In
07:00

N
N

0 / 1 mph 71 / 71°F 91% 1018 mb
Low level cloud: 3%
Mid level cloud: 14%
High level cloud: 94%
Most Significant Cloud Type: medium
24%
0.0 In
13:00

N
N

7 / 15 mph 79 / 80°F 41% 1013 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
0.0 In
19:00

NNW
NNW

5 / 10 mph 77 / 80°F 77% 1017 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 96%
Most Significant Cloud Type: medium
20%
0.0 In
Thu 06
Jun
01:00

N
N

5 / 11 mph 54 / 53°F 96% 1015 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
07:00

ENE
ENE

1 / 2 mph 71 / 71°F 94% 1020 mb
Low level cloud: 19%
Mid level cloud: 13%
High level cloud: 13%
Most Significant Cloud Type: low
25%
0.1 In
13:00

NNW
NNW

5 / 11 mph 80 / 80°F 40% 1014 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
0.0 In
19:00

NW
NW

4 / 9 mph 78 / 81°F 75% 1017 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 62%
Most Significant Cloud Type: medium
13%
0.0 In
Fri 07
Jun
01:00

NNW
NNW

4 / 7 mph 56 / 56°F 94% 1014 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
07:00

NW
NW

1 / 2 mph 72 / 76°F 78% 1019 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 32%
Most Significant Cloud Type: medium
5%
0.0 In
13:00

NNW
NNW

6 / 13 mph 76 / 78°F 48% 1012 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
0.0 In
19:00

NW
NW

3 / 6 mph 81 / 86°F 71% 1013 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 9%
Most Significant Cloud Type: medium
18%
0.0 In
Sat 08
Jun
01:00

NNE
NNE

3 / 5 mph 60 / 60°F 97% 1012 mb
Low level cloud: 10%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
15%
0.0 In
07:00

SW
SW

8 / 16 mph 68 / 68°F 99% 1011 mb
Low level cloud: 86%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 In
13:00

NNE
NNE

6 / 14 mph 76 / 78°F 53% 1013 mb
Low level cloud: 35%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
51%
0.0 In
19:00

NNW
NNW

6 / 14 mph 67 / 67°F 61% 1012 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
7%
0.3 In
Sun 09
Jun
01:00

NNE
NNE

3 / 7 mph 60 / 60°F 96% 1015 mb
Low level cloud: 3%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
4%
0.0 In
07:00

WSW
WSW

6 / 12 mph 62 / 62°F 74% 1013 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
13:00

NNE
NNE

5 / 10 mph 80 / 80°F 44% 1015 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 12%
Most Significant Cloud Type: medium
9%
0.0 In
19:00

WNW
WNW

9 / 19 mph 69 / 69°F 71% 1008 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 2%
Most Significant Cloud Type: medium
21%
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