WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Porec 14 Day Long Range Forecast

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

Croatia

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

The next 14 day outlook for Porec shows the average daytime maximum temperature will be around 20°C, with a high for the two weeks of 24°C expected on the afternoon of Tuesday 30th. The mean minimum temperature will be 13°C, dipping to its lowest on the morning of Sunday 28th at 11°C. The next 14 days will have some days seeing a little precipitation and some days with rain. Predictions are Wednesday 8th will have the most precipitation with an accumulation of around 15.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 28
Apr
19:00

NNE
NNE

3 / 6 mph 60 / 60°F 78% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 49%
Most Significant Cloud Type: high
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

6 / 13 mph 56 / 55°F 82% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 22%
Most Significant Cloud Type: high
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 29
Apr
01:00

NE
NE

5 / 11 mph 55 / 54°F 81% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

4 / 9 mph 54 / 53°F 78% 1020 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

NNE
NNE

4 / 8 mph 59 / 58°F 71% 1020 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
10:00

NW
NW

5 / 6 mph 69 / 67°F 61% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 16%
Most Significant Cloud Type: high
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

6 / 8 mph 70 / 68°F 61% 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
16:00

NW
NW

3 / 4 mph 70 / 68°F 61% 1020 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
19:00

NNW
NNW

1 / 1 mph 68 / 66°F 73% 1020 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
22:00

ENE
ENE

4 / 9 mph 59 / 59°F 72% 1021 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 30
Apr
01:00

NE
NE

2 / 5 mph 57 / 58°F 72% 1020 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
04:00

ENE
ENE

3 / 6 mph 55 / 55°F 71% 1019 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

E
E

2 / 4 mph 62 / 60°F 70% 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
10:00

WSW
WSW

3 / 4 mph 74 / 76°F 59% 1019 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 1%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

5 / 6 mph 75 / 76°F 57% 1018 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
16:00

W
W

3 / 3 mph 75 / 77°F 61% 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
19:00

NE
NE

2 / 5 mph 64 / 62°F 73% 1015 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
22:00

E
E

3 / 6 mph 59 / 59°F 79% 1014 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
Wed 01
May
01:00

ESE
ESE

4 / 9 mph 56 / 56°F 79% 1014 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 32%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

E
E

6 / 12 mph 55 / 53°F 80% 1012 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 68%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

E
E

5 / 11 mph 59 / 57°F 86% 1012 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
10:00

E
E

4 / 5 mph 72 / 68°F 75% 1012 mb
Low level cloud: 0%
Mid level cloud: 54%
High level cloud: 100%
Most Significant Cloud Type: medium
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SE
SE

6 / 7 mph 73 / 76°F 69% 1011 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 79%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ESE
ESE

6 / 8 mph 74 / 76°F 67% 1009 mb
Low level cloud: 6%
Mid level cloud: 50%
High level cloud: 100%
Most Significant Cloud Type: medium
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ESE
ESE

12 / 16 mph 67 / 67°F 70% 1009 mb
Low level cloud: 52%
Mid level cloud: 91%
High level cloud: 85%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

14 / 26 mph 59 / 56°F 84% 1009 mb
Low level cloud: 88%
Mid level cloud: 59%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Thu 02
May
01:00

ESE
ESE

7 / 13 mph 58 / 57°F 92% 1008 mb
Low level cloud: 88%
Mid level cloud: 75%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
04:00

S
S

9 / 16 mph 56 / 54°F 90% 1008 mb
Low level cloud: 32%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

11 / 18 mph 56 / 53°F 93% 1009 mb
Low level cloud: 90%
Mid level cloud: 100%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

SE
SE

17 / 20 mph 60 / 60°F 89% 1010 mb
Low level cloud: 97%
Mid level cloud: 64%
High level cloud: 75%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
13:00

S
S

14 / 18 mph 64 / 64°F 93% 1010 mb
Low level cloud: 55%
Mid level cloud: 91%
High level cloud: 99%
Most Significant Cloud Type: low
99%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

SSW
SSW

23 / 32 mph 65 / 64°F 76% 1010 mb
Low level cloud: 12%
Mid level cloud: 29%
High level cloud: 50%
Most Significant Cloud Type: low
28%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

SW
SW

8 / 9 mph 64 / 62°F 78% 1010 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 34%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

9 / 11 mph 59 / 59°F 80% 1011 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 3%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 03
May
01:00

S
S

4 / 6 mph 56 / 55°F 83% 1011 mb
Low level cloud: 0%
Mid level cloud: 79%
High level cloud: 32%
Most Significant Cloud Type: medium
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

8 / 12 mph 54 / 52°F 78% 1011 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 19%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

W
W

5 / 7 mph 56 / 53°F 71% 1012 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 16%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

6 / 8 mph 59 / 56°F 63% 1013 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 59%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

7 / 8 mph 62 / 60°F 59% 1013 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 38%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

1 / 2 mph 63 / 60°F 56% 1014 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 9%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

4 / 5 mph 62 / 59°F 67% 1014 mb
Low level cloud: 0%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: medium
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

3 / 4 mph 57 / 58°F 72% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 77%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 04
May
01:00

ENE
ENE

4 / 6 mph 54 / 53°F 77% 1016 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 18%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

4 / 8 mph 53 / 51°F 78% 1016 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 9%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

4 / 5 mph 58 / 56°F 69% 1017 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 4%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NW
NW

6 / 7 mph 63 / 61°F 61% 1018 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 1%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

9 / 12 mph 63 / 62°F 60% 1018 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
16:00

W
W

5 / 6 mph 64 / 62°F 59% 1018 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
19:00

NW
NW

1 / 2 mph 62 / 60°F 76% 1018 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
22:00

ENE
ENE

3 / 6 mph 57 / 58°F 76% 1019 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 12%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 05
May
01:00

ESE
ESE

4 / 8 mph 60 / 60°F 84% 1012 mb
Low level cloud: 15%
Mid level cloud: 6%
High level cloud: 13%
Most Significant Cloud Type: low
18%
0.0 In
07:00

SSE
SSE

11 / 21 mph 62 / 62°F 86% 1009 mb
Low level cloud: 10%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.0 In
13:00

WSW
WSW

5 / 10 mph 64 / 64°F 70% 1016 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
19:00

S
S

6 / 13 mph 56 / 55°F 86% 1011 mb
Low level cloud: 42%
Mid level cloud: 100%
High level cloud: 2%
Most Significant Cloud Type: low
76%
0.0 In
Mon 06
May
01:00

SW
SW

8 / 17 mph 57 / 55°F 80% 1008 mb
Low level cloud: 49%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: low
68%
0.0 In
07:00

SE
SE

5 / 11 mph 59 / 58°F 72% 1011 mb
Low level cloud: 1%
Mid level cloud: 43%
High level cloud: 94%
Most Significant Cloud Type: medium
48%
0.0 In
13:00

SW
SW

5 / 11 mph 70 / 70°F 64% 1016 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 59%
Most Significant Cloud Type: medium
5%
0.0 In
19:00

ESE
ESE

5 / 11 mph 64 / 64°F 84% 1014 mb
Low level cloud: 8%
Mid level cloud: 29%
High level cloud: 15%
Most Significant Cloud Type: medium
51%
0.0 In
Tue 07
May
01:00

NNE
NNE

3 / 6 mph 62 / 62°F 84% 1017 mb
Low level cloud: 70%
Mid level cloud: 97%
High level cloud: 13%
Most Significant Cloud Type: low
100%
0.0 In
07:00

SE
SE

9 / 19 mph 59 / 59°F 89% 1011 mb
Low level cloud: 87%
Mid level cloud: 58%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
13:00

WSW
WSW

5 / 10 mph 67 / 67°F 70% 1017 mb
Low level cloud: 2%
Mid level cloud: 7%
High level cloud: 13%
Most Significant Cloud Type: medium
14%
0.0 In
19:00

ENE
ENE

8 / 17 mph 54 / 52°F 78% 1012 mb
Low level cloud: 85%
Mid level cloud: 78%
High level cloud: 20%
Most Significant Cloud Type: low
100%
0.2 In
Wed 08
May
01:00

E
E

6 / 14 mph 57 / 56°F 84% 1014 mb
Low level cloud: 0%
Mid level cloud: 82%
High level cloud: 89%
Most Significant Cloud Type: medium
85%
0.0 In
07:00

NNE
NNE

0 / 0 mph 55 / 55°F 77% 1013 mb
Low level cloud: 51%
Mid level cloud: 96%
High level cloud: 86%
Most Significant Cloud Type: low
94%
0.1 In
13:00

NE
NE

5 / 11 mph 61 / 62°F 93% 1013 mb
Low level cloud: 93%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.6 In
19:00

NE
NE

17 / 36 mph 58 / 55°F 72% 1015 mb
Low level cloud: 20%
Mid level cloud: 56%
High level cloud: 4%
Most Significant Cloud Type: low
39%
0.3 In
Thu 09
May
01:00

NE
NE

12 / 26 mph 57 / 55°F 81% 1012 mb
Low level cloud: 73%
Mid level cloud: 95%
High level cloud: 99%
Most Significant Cloud Type: low
100%
0.1 In
07:00

NE
NE

22 / 45 mph 51 / 44°F 47% 1020 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 33%
Most Significant Cloud Type: medium
24%
0.0 In
13:00

NE
NE

15 / 31 mph 61 / 61°F 65% 1014 mb
Low level cloud: 28%
Mid level cloud: 68%
High level cloud: 43%
Most Significant Cloud Type: low
57%
0.2 In
19:00

E
E

18 / 38 mph 54 / 49°F 44% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 8%
Most Significant Cloud Type: high
7%
0.0 In
Fri 10
May
01:00

NE
NE

6 / 12 mph 60 / 60°F 76% 1015 mb
Low level cloud: 0%
Mid level cloud: 67%
High level cloud: 100%
Most Significant Cloud Type: medium
71%
0.0 In
07:00

NE
NE

12 / 24 mph 52 / 48°F 47% 1019 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 10%
Most Significant Cloud Type: medium
46%
0.0 In
13:00

NE
NE

18 / 37 mph 65 / 65°F 58% 1018 mb
Low level cloud: 36%
Mid level cloud: 43%
High level cloud: 8%
Most Significant Cloud Type: low
52%
0.0 In
19:00

NE
NE

9 / 18 mph 53 / 50°F 49% 1019 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 2%
Most Significant Cloud Type: medium
26%
0.0 In
Sat 11
May
01:00

NE
NE

8 / 16 mph 53 / 51°F 75% 1019 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
07:00

ENE
ENE

5 / 11 mph 53 / 51°F 55% 1020 mb
Low level cloud: 1%
Mid level cloud: 28%
High level cloud: 3%
Most Significant Cloud Type: medium
31%
0.0 In
13:00

WSW
WSW

10 / 21 mph 65 / 65°F 64% 1018 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
19:00

WNW
WNW

4 / 9 mph 58 / 58°F 63% 1018 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
Sun 12
May
01:00

NE
NE

4 / 9 mph 54 / 54°F 78% 1018 mb
Low level cloud: 46%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
45%
0.0 In
07:00

N
N

2 / 4 mph 61 / 61°F 71% 1018 mb
Low level cloud: 1%
Mid level cloud: 3%
High level cloud: 2%
Most Significant Cloud Type: low
2%
0.0 In
13:00

WSW
WSW

9 / 18 mph 65 / 65°F 64% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
19:00

SSE
SSE

1 / 1 mph 63 / 63°F 61% 1017 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Mon 13
May
01:00

ENE
ENE

6 / 13 mph 55 / 54°F 83% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

E
E

3 / 6 mph 62 / 62°F 63% 1019 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
13:00

SW
SW

7 / 14 mph 69 / 69°F 62% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
19:00

NNW
NNW

2 / 4 mph 64 / 64°F 67% 1021 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In

Other Locations Near to Porec

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