WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Pompton Lake 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Pompton Lake

New Jersey, United States Of America

Long range weather outlook for Pompton Lake includes 14 day forecast summary:

For Pompton Lake in the coming two weeks the average daytime maximum temperature will be around 21°C, with a high for the two weeks of 29°C expected on the afternoon of Saturday 17th. The average minimum temperature will be 12°C, dipping to its lowest on the morning of Tuesday 20th at 7°C. Expect the following 14 days ahead to have some days seeing a little precipitation and some days with rain. The current forecast indicates Wednesday 14th will have the most precipitation with an accumulation of around 22.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Mon 12
May
01:00

NNE
NNE

4 / 7 mph 53 / 53°F 56% 1026 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 47 / 46°F 61% 1027 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

ESE
ESE

3 / 4 mph 61 / 59°F 55% 1028 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

S
S

7 / 8 mph 72 / 70°F 33% 1026 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
13:00

S
S

7 / 8 mph 79 / 76°F 33% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

8 / 9 mph 79 / 78°F 42% 1021 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

2 / 5 mph 66 / 63°F 65% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 31%
Most Significant Cloud Type: high
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

3 / 6 mph 59 / 60°F 77% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 91%
Most Significant Cloud Type: high
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 13
May
19:00

E
E

8 / 10 mph 60 / 60°F 96% 1021 mb
Low level cloud: 100%
Mid level cloud: 75%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

E
E

9 / 12 mph 58 / 56°F 98% 1020 mb
Low level cloud: 100%
Mid level cloud: 55%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Wed 14
May
01:00

ESE
ESE

7 / 10 mph 58 / 56°F 99% 1019 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 89%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
04:00

ESE
ESE

9 / 12 mph 58 / 56°F 98% 1018 mb
Low level cloud: 100%
Mid level cloud: 85%
High level cloud: 19%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
07:00

ESE
ESE

12 / 19 mph 57 / 54°F 98% 1018 mb
Low level cloud: 94%
Mid level cloud: 91%
High level cloud: 87%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

ESE
ESE

12 / 17 mph 58 / 56°F 97% 1018 mb
Low level cloud: 100%
Mid level cloud: 86%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
13:00

ESE
ESE

11 / 14 mph 60 / 60°F 98% 1017 mb
Low level cloud: 100%
Mid level cloud: 51%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

ESE
ESE

9 / 12 mph 60 / 60°F 99% 1015 mb
Low level cloud: 100%
Mid level cloud: 24%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

E
E

6 / 9 mph 60 / 60°F 99% 1015 mb
Low level cloud: 100%
Mid level cloud: 7%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

4 / 7 mph 59 / 59°F 99% 1015 mb
Low level cloud: 100%
Mid level cloud: 6%
High level cloud: 18%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 15
May
01:00

ENE
ENE

4 / 6 mph 59 / 59°F 99% 1014 mb
Low level cloud: 100%
Mid level cloud: 10%
High level cloud: 10%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

4 / 6 mph 60 / 60°F 99% 1013 mb
Low level cloud: 100%
Mid level cloud: 15%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

4 / 5 mph 61 / 60°F 99% 1013 mb
Low level cloud: 100%
Mid level cloud: 21%
High level cloud: 17%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ENE
ENE

3 / 4 mph 64 / 64°F 96% 1013 mb
Low level cloud: 94%
Mid level cloud: 35%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ESE
ESE

4 / 4 mph 68 / 68°F 84% 1011 mb
Low level cloud: 93%
Mid level cloud: 24%
High level cloud: 4%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

N
N

1 / 1 mph 76 / 77°F 71% 1010 mb
Low level cloud: 71%
Mid level cloud: 23%
High level cloud: 14%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NE
NE

0 / 1 mph 68 / 67°F 85% 1010 mb
Low level cloud: 92%
Mid level cloud: 19%
High level cloud: 4%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

1 / 2 mph 65 / 65°F 91% 1009 mb
Low level cloud: 83%
Mid level cloud: 9%
High level cloud: 7%
Most Significant Cloud Type: low
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 16
May
01:00

S
S

2 / 4 mph 62 / 62°F 96% 1009 mb
Low level cloud: 29%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

2 / 5 mph 59 / 59°F 98% 1008 mb
Low level cloud: 35%
Mid level cloud: 22%
High level cloud: 5%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

3 / 4 mph 69 / 67°F 88% 1008 mb
Low level cloud: 30%
Mid level cloud: 17%
High level cloud: 100%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

7 / 8 mph 75 / 77°F 75% 1007 mb
Low level cloud: 67%
Mid level cloud: 46%
High level cloud: 81%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

4 / 4 mph 74 / 76°F 88% 1006 mb
Low level cloud: 30%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

9 / 10 mph 79 / 79°F 73% 1005 mb
Low level cloud: 24%
Mid level cloud: 5%
High level cloud: 97%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

4 / 8 mph 72 / 69°F 90% 1006 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
22:00

W
W

3 / 7 mph 64 / 64°F 91% 1006 mb
Low level cloud: 0%
Mid level cloud: 57%
High level cloud: 32%
Most Significant Cloud Type: medium
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 17
May
01:00

WNW
WNW

3 / 6 mph 62 / 62°F 92% 1006 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
04:00

NNW
NNW

2 / 5 mph 59 / 59°F 92% 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
07:00

SSW
SSW

3 / 4 mph 69 / 66°F 83% 1006 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

6 / 7 mph 78 / 78°F 63% 1004 mb
Low level cloud: 0%
Mid level cloud: 50%
High level cloud: 0%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

9 / 11 mph 83 / 82°F 49% 1003 mb
Low level cloud: 20%
Mid level cloud: 6%
High level cloud: 3%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

12 / 14 mph 84 / 83°F 49% 1003 mb
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WNW
WNW

6 / 12 mph 73 / 76°F 70% 1005 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
22:00

W
W

3 / 7 mph 62 / 62°F 80% 1007 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 18
May
01:00

W
W

4 / 9 mph 59 / 59°F 80% 1007 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

5 / 11 mph 57 / 56°F 74% 1007 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
07:00

WSW
WSW

8 / 9 mph 70 / 68°F 65% 1007 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
10:00

WSW
WSW

12 / 14 mph 77 / 77°F 46% 1006 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

14 / 16 mph 80 / 78°F 35% 1005 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

W
W

11 / 13 mph 79 / 78°F 39% 1004 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 18%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNW
NNW

11 / 14 mph 61 / 60°F 65% 1007 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
22:00

NNW
NNW

9 / 11 mph 57 / 55°F 69% 1008 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Mon 19
May
01:00

NW
NW

7 / 12 mph 53 / 50°F 73% 1009 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
07:00

W
W

2 / 5 mph 63 / 63°F 61% 1009 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
13:00

NW
NW

16 / 34 mph 50 / 44°F 77% 1002 mb
Low level cloud: 84%
Mid level cloud: 43%
High level cloud: 13%
Most Significant Cloud Type: low
100%
0.0 In
19:00

NNW
NNW

11 / 23 mph 56 / 53°F 61% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Tue 20
May
01:00

ENE
ENE

3 / 6 mph 67 / 67°F 95% 1015 mb
Low level cloud: 20%
Mid level cloud: 97%
High level cloud: 19%
Most Significant Cloud Type: medium
100%
0.0 In
07:00

NE
NE

4 / 9 mph 66 / 66°F 69% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

SSE
SSE

11 / 23 mph 74 / 76°F 42% 1018 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 89%
Most Significant Cloud Type: medium
6%
0.0 In
19:00

NNW
NNW

14 / 22 mph 50 / 44°F 69% 1012 mb
Low level cloud: 13%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
23%
0.0 In
Wed 21
May
01:00

SE
SE

7 / 15 mph 62 / 62°F 83% 1020 mb
Low level cloud: 15%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.0 In
07:00

NNW
NNW

11 / 18 mph 51 / 47°F 65% 1011 mb
Low level cloud: 6%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
7%
0.0 In
13:00

SSE
SSE

13 / 26 mph 63 / 63°F 76% 1016 mb
Low level cloud: 41%
Mid level cloud: 81%
High level cloud: 100%
Most Significant Cloud Type: low
81%
0.0 In
19:00

N
N

4 / 7 mph 65 / 65°F 66% 1007 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: medium
9%
0.0 In
Thu 22
May
01:00

ESE
ESE

3 / 6 mph 61 / 61°F 99% 1012 mb
Low level cloud: 100%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
07:00

E
E

1 / 2 mph 59 / 59°F 77% 1007 mb
Low level cloud: 0%
Mid level cloud: 92%
High level cloud: 100%
Most Significant Cloud Type: medium
96%
0.0 In
13:00

NNW
NNW

9 / 19 mph 69 / 69°F 59% 1014 mb
Low level cloud: 14%
Mid level cloud: 14%
High level cloud: 6%
Most Significant Cloud Type: low
19%
0.0 In
19:00

E
E

6 / 10 mph 57 / 56°F 98% 1006 mb
Low level cloud: 100%
Mid level cloud: 46%
High level cloud: 1%
Most Significant Cloud Type: low
100%
0.1 In
Fri 23
May
01:00

NNW
NNW

9 / 18 mph 58 / 56°F 78% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

NE
NE

6 / 11 mph 55 / 53°F 92% 1003 mb
Low level cloud: 59%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
70%
0.0 In
13:00

NNW
NNW

3 / 7 mph 86 / 86°F 37% 1015 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
19:00

NW
NW

10 / 18 mph 57 / 55°F 96% 1004 mb
Low level cloud: 84%
Mid level cloud: 92%
High level cloud: 2%
Most Significant Cloud Type: low
100%
0.3 In
Sat 24
May
01:00

SSE
SSE

3 / 6 mph 66 / 66°F 78% 1015 mb
Low level cloud: 0%
Mid level cloud: 51%
High level cloud: 53%
Most Significant Cloud Type: medium
52%
0.0 In
07:00

NW
NW

13 / 24 mph 52 / 47°F 70% 1008 mb
Low level cloud: 2%
Mid level cloud: 14%
High level cloud: 1%
Most Significant Cloud Type: medium
20%
0.0 In
13:00

SW
SW

10 / 20 mph 86 / 87°F 45% 1010 mb
Low level cloud: 21%
Mid level cloud: 57%
High level cloud: 0%
Most Significant Cloud Type: low
40%
0.0 In
19:00

NW
NW

9 / 16 mph 55 / 53°F 63% 1009 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
0.0 In
Sun 25
May
01:00

SW
SW

9 / 19 mph 68 / 67°F 98% 1010 mb
Low level cloud: 82%
Mid level cloud: 45%
High level cloud: 97%
Most Significant Cloud Type: low
100%
0.3 In
07:00

WNW
WNW

7 / 13 mph 54 / 53°F 69% 1009 mb
Low level cloud: 86%
Mid level cloud: 48%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
13:00

NW
NW

8 / 17 mph 83 / 82°F 38% 1008 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
0.3 In
19:00

NW
NW

9 / 16 mph 53 / 51°F 77% 1009 mb
Low level cloud: 29%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
44%
0.0 In
Mon 26
May
01:00

NNW
NNW

10 / 21 mph 61 / 62°F 58% 1012 mb
Low level cloud: 0%
Mid level cloud: 86%
High level cloud: 13%
Most Significant Cloud Type: medium
86%
0.0 In
07:00

NW
NW

4 / 9 mph 56 / 56°F 66% 1011 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 3%
Most Significant Cloud Type: medium
18%
0.0 In
13:00

NNW
NNW

15 / 30 mph 70 / 71°F 33% 1014 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
0.0 In
19:00

E
E

4 / 8 mph 60 / 60°F 60% 1013 mb
Low level cloud: 11%
Mid level cloud: 72%
High level cloud: 96%
Most Significant Cloud Type: medium
100%
0.0 In
Tue 27
May
01:00

NNW
NNW

6 / 14 mph 55 / 54°F 65% 1022 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
07:00

ENE
ENE

10 / 20 mph 51 / 47°F 95% 1015 mb
Low level cloud: 100%
Mid level cloud: 85%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
13:00

NW
NW

4 / 9 mph 79 / 78°F 27% 1024 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 4%
Most Significant Cloud Type: medium
6%
0.0 In
19:00

NE
NE

4 / 9 mph 57 / 57°F 98% 1015 mb
Low level cloud: 99%
Mid level cloud: 96%
High level cloud: 86%
Most Significant Cloud Type: low
100%
0.4 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