WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Giessen 14 Day Long Range Forecast

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

Germany

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

Taking a look at Giessen over the coming two weeks and the average daytime maximum temperature will be around 21°C, with a high for the two weeks of 27°C expected on the afternoon of Friday 2nd. The mean minimum temperature will be 8°C, dipping to its lowest on the morning of Wednesday 7th at 2°C. Expect the coming 14 days to have most days seeing a little rain. Predictions are Saturday 3rd will have the most precipitation with an accumulation of around 6.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Tue 29
Apr
19:00

NNE
NNE

6 / 12 mph 63 / 61°F 61% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 20%
Most Significant Cloud Type: high
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

N
N

5 / 10 mph 55 / 54°F 73% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 30
Apr
01:00

NNE
NNE

4 / 9 mph 51 / 50°F 82% 1024 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 21%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

4 / 8 mph 49 / 47°F 84% 1024 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 19%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNE
NNE

3 / 4 mph 58 / 57°F 74% 1024 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 8%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

5 / 5 mph 70 / 68°F 51% 1024 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 13%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ESE
ESE

5 / 6 mph 76 / 76°F 39% 1023 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 12%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SE
SE

3 / 3 mph 78 / 76°F 35% 1021 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 8%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNW
NNW

2 / 4 mph 69 / 66°F 56% 1021 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 7%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

2 / 4 mph 60 / 60°F 65% 1022 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 5%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 01
May
01:00

N
N

3 / 6 mph 54 / 54°F 69% 1022 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 4%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

3 / 6 mph 52 / 52°F 79% 1021 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

ENE
ENE

1 / 2 mph 61 / 59°F 73% 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
10:00

SE
SE

4 / 5 mph 72 / 70°F 56% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSE
SSE

6 / 7 mph 78 / 77°F 47% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

4 / 4 mph 79 / 77°F 43% 1019 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

E
E

2 / 3 mph 72 / 69°F 58% 1018 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 6%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WNW
WNW

3 / 6 mph 60 / 60°F 64% 1019 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 100%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 02
May
01:00

W
W

2 / 5 mph 57 / 58°F 70% 1018 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 100%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

3 / 6 mph 55 / 56°F 75% 1018 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 15%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

3 / 4 mph 64 / 62°F 73% 1019 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 1%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

5 / 5 mph 75 / 77°F 60% 1018 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
13:00

SSW
SSW

8 / 9 mph 80 / 79°F 50% 1017 mb
Low level cloud: 1%
Mid level cloud: 22%
High level cloud: 7%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

9 / 11 mph 80 / 79°F 45% 1015 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 5%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

4 / 8 mph 73 / 76°F 67% 1015 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
22:00

WNW
WNW

4 / 9 mph 62 / 62°F 74% 1015 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
Sat 03
May
01:00

NW
NW

4 / 7 mph 58 / 58°F 83% 1015 mb
Low level cloud: 1%
Mid level cloud: 11%
High level cloud: 100%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

3 / 6 mph 56 / 57°F 86% 1015 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 100%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NW
NW

2 / 2 mph 66 / 63°F 79% 1014 mb
Low level cloud: 0%
Mid level cloud: 57%
High level cloud: 100%
Most Significant Cloud Type: medium
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NW
NW

4 / 4 mph 71 / 71°F 68% 1014 mb
Low level cloud: 80%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

6 / 9 mph 75 / 76°F 69% 1013 mb
Low level cloud: 37%
Mid level cloud: 46%
High level cloud: 2%
Most Significant Cloud Type: low
52%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

WNW
WNW

9 / 14 mph 74 / 76°F 70% 1012 mb
Low level cloud: 24%
Mid level cloud: 35%
High level cloud: 10%
Most Significant Cloud Type: low
36%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

NNW
NNW

7 / 12 mph 67 / 65°F 73% 1012 mb
Low level cloud: 1%
Mid level cloud: 22%
High level cloud: 100%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNW
NNW

6 / 12 mph 55 / 54°F 73% 1013 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 04
May
01:00

NNW
NNW

5 / 11 mph 50 / 48°F 80% 1014 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 16%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNW
NNW

5 / 9 mph 49 / 47°F 81% 1014 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 9%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

N
N

6 / 7 mph 53 / 49°F 75% 1014 mb
Low level cloud: 1%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

N
N

9 / 10 mph 59 / 56°F 51% 1014 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 59%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

N
N

10 / 11 mph 64 / 62°F 39% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

N
N

9 / 11 mph 65 / 64°F 39% 1013 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 13%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

9 / 14 mph 58 / 55°F 59% 1014 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 6%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

N
N

6 / 10 mph 49 / 46°F 72% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 05
May
01:00

N
N

6 / 7 mph 44 / 41°F 85% 1016 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

N
N

5 / 9 mph 37 / 33°F 94% 1017 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNE
NNE

6 / 7 mph 43 / 39°F 72% 1017 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNE
NNE

9 / 10 mph 52 / 48°F 51% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: high
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNE
NNE

7 / 8 mph 59 / 57°F 41% 1014 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 7%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNE
NNE

8 / 9 mph 63 / 61°F 39% 1012 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

10 / 16 mph 54 / 50°F 55% 1014 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

N
N

6 / 13 mph 43 / 39°F 72% 1016 mb
Low level cloud: 1%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Tue 06
May
01:00

NNE
NNE

6 / 10 mph 49 / 47°F 70% 1015 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 100%
Most Significant Cloud Type: medium
5%
0.0 In
07:00

NW
NW

6 / 11 mph 46 / 43°F 70% 1015 mb
Low level cloud: 31%
Mid level cloud: 6%
High level cloud: 2%
Most Significant Cloud Type: low
33%
0.0 In
13:00

SSW
SSW

10 / 17 mph 58 / 56°F 63% 1004 mb
Low level cloud: 34%
Mid level cloud: 63%
High level cloud: 49%
Most Significant Cloud Type: low
61%
0.0 In
19:00

NW
NW

7 / 12 mph 65 / 65°F 55% 1016 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
0.0 In
Wed 07
May
01:00

NNW
NNW

5 / 8 mph 43 / 41°F 90% 1019 mb
Low level cloud: 3%
Mid level cloud: 7%
High level cloud: 33%
Most Significant Cloud Type: medium
16%
0.0 In
07:00

WNW
WNW

3 / 3 mph 46 / 45°F 84% 1015 mb
Low level cloud: 85%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
13:00

NW
NW

9 / 12 mph 48 / 44°F 90% 1009 mb
Low level cloud: 96%
Mid level cloud: 74%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
19:00

WSW
WSW

10 / 21 mph 63 / 63°F 66% 1006 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
0.0 In
Thu 08
May
01:00

NW
NW

3 / 6 mph 46 / 45°F 66% 1016 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 6%
Most Significant Cloud Type: medium
25%
0.0 In
07:00

SW
SW

5 / 11 mph 56 / 55°F 85% 1006 mb
Low level cloud: 12%
Mid level cloud: 30%
High level cloud: 7%
Most Significant Cloud Type: low
22%
0.0 In
13:00

WSW
WSW

5 / 10 mph 67 / 67°F 42% 1014 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 9%
Most Significant Cloud Type: medium
46%
0.0 In
19:00

W
W

7 / 15 mph 56 / 55°F 68% 1008 mb
Low level cloud: 2%
Mid level cloud: 44%
High level cloud: 16%
Most Significant Cloud Type: medium
50%
0.0 In
Fri 09
May
01:00

WNW
WNW

3 / 6 mph 51 / 51°F 86% 1016 mb
Low level cloud: 16%
Mid level cloud: 23%
High level cloud: 5%
Most Significant Cloud Type: low
25%
0.0 In
07:00

W
W

3 / 7 mph 49 / 49°F 93% 1011 mb
Low level cloud: 100%
Mid level cloud: 81%
High level cloud: 1%
Most Significant Cloud Type: low
100%
0.0 In
13:00

WSW
WSW

5 / 10 mph 66 / 66°F 56% 1016 mb
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 18%
Most Significant Cloud Type: medium
33%
0.0 In
19:00

N
N

4 / 9 mph 55 / 54°F 67% 1015 mb
Low level cloud: 8%
Mid level cloud: 46%
High level cloud: 3%
Most Significant Cloud Type: medium
68%
0.1 In
Sat 10
May
01:00

NNW
NNW

2 / 4 mph 62 / 62°F 69% 1016 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 59%
Most Significant Cloud Type: medium
17%
0.0 In
07:00

SSW
SSW

1 / 3 mph 50 / 50°F 76% 1021 mb
Low level cloud: 26%
Mid level cloud: 57%
High level cloud: 11%
Most Significant Cloud Type: low
46%
0.0 In
13:00

S
S

1 / 2 mph 56 / 56°F 94% 1014 mb
Low level cloud: 94%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
19:00

WNW
WNW

5 / 10 mph 62 / 62°F 64% 1020 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 9%
Most Significant Cloud Type: medium
19%
0.0 In
Sun 11
May
01:00

WNW
WNW

4 / 8 mph 53 / 53°F 95% 1015 mb
Low level cloud: 77%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
93%
0.1 In
07:00

W
W

1 / 2 mph 58 / 58°F 74% 1023 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 19%
Most Significant Cloud Type: high
19%
0.0 In
13:00

W
W

8 / 17 mph 61 / 62°F 55% 1016 mb
Low level cloud: 51%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
60%
0.0 In
19:00

SSE
SSE

2 / 3 mph 69 / 69°F 64% 1019 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 4%
Most Significant Cloud Type: medium
10%
0.0 In
Mon 12
May
01:00

NW
NW

3 / 6 mph 47 / 46°F 91% 1017 mb
Low level cloud: 0%
Mid level cloud: 37%
High level cloud: 7%
Most Significant Cloud Type: medium
37%
0.1 In
07:00

NE
NE

3 / 6 mph 61 / 61°F 71% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: high
5%
0.0 In
13:00

SSW
SSW

4 / 9 mph 65 / 65°F 49% 1015 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 9%
Most Significant Cloud Type: medium
44%
0.0 In
19:00

NNE
NNE

6 / 14 mph 66 / 66°F 64% 1019 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 33%
Most Significant Cloud Type: medium
6%
0.0 In
Tue 13
May
01:00

NW
NW

2 / 5 mph 50 / 50°F 84% 1015 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 13%
Most Significant Cloud Type: medium
28%
0.0 In
07:00

NE
NE

4 / 9 mph 63 / 63°F 75% 1022 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 87%
Most Significant Cloud Type: medium
9%
0.0 In
13:00

E
E

2 / 5 mph 66 / 66°F 61% 1015 mb
Low level cloud: 1%
Mid level cloud: 28%
High level cloud: 100%
Most Significant Cloud Type: medium
34%
0.0 In
19:00

NNE
NNE

6 / 12 mph 65 / 65°F 64% 1022 mb
Low level cloud: 0%
Mid level cloud: 35%
High level cloud: 100%
Most Significant Cloud Type: medium
39%
0.0 In
Wed 14
May
01:00

N
N

4 / 9 mph 50 / 49°F 84% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 15%
Most Significant Cloud Type: medium
46%
0.0 In
07:00

NE
NE

5 / 11 mph 63 / 63°F 70% 1025 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
13:00

E
E

6 / 13 mph 72 / 76°F 44% 1013 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: medium
33%
0.0 In
19:00

ENE
ENE

12 / 25 mph 65 / 65°F 55% 1024 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
0.0 In

Other Locations Near to Giessen

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