WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Morogoro 14 Day Long Range Forecast

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

Tanzania

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

Taking a look at Morogoro over the coming two weeks and the average daytime maximum temperature will be around 26°C, with a high for the two weeks of 28°C expected on the afternoon of Monday 13th. The average minimum temperature will be 19°C, dipping to its lowest on the morning of Sunday 5th at 16°C. The coming 14 days will have some days seeing a little precipitation and some days with rain. The current forecast indicates Sunday 5th will have the most precipitation with an accumulation of around 12.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sat 04
May
18:00

SSW
SSW

5 / 6 mph 76 / 77°F 88% 1013 mb
Low level cloud: 29%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

3 / 4 mph 71 / 71°F 93% 1016 mb
Low level cloud: 39%
Mid level cloud: 82%
High level cloud: 0%
Most Significant Cloud Type: low
67%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Sun 05
May
00:00

SW
SW

3 / 4 mph 68 / 68°F 95% 1016 mb
Low level cloud: 46%
Mid level cloud: 94%
High level cloud: 0%
Most Significant Cloud Type: low
78%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

SW
SW

2 / 3 mph 66 / 66°F 98% 1014 mb
Low level cloud: 65%
Mid level cloud: 81%
High level cloud: 0%
Most Significant Cloud Type: low
93%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

WSW
WSW

1 / 2 mph 65 / 65°F 97% 1015 mb
Low level cloud: 65%
Mid level cloud: 79%
High level cloud: 22%
Most Significant Cloud Type: low
95%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
09:00

SW
SW

3 / 4 mph 68 / 67°F 97% 1017 mb
Low level cloud: 80%
Mid level cloud: 84%
High level cloud: 37%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

SW
SW

3 / 4 mph 72 / 76°F 87% 1016 mb
Low level cloud: 66%
Mid level cloud: 74%
High level cloud: 21%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

2 / 2 mph 74 / 77°F 86% 1014 mb
Low level cloud: 69%
Mid level cloud: 60%
High level cloud: 4%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

1 / 2 mph 76 / 76°F 91% 1015 mb
Low level cloud: 37%
Mid level cloud: 52%
High level cloud: 20%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

2 / 2 mph 69 / 69°F 93% 1017 mb
Low level cloud: 51%
Mid level cloud: 65%
High level cloud: 100%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 06
May
00:00

SW
SW

1 / 2 mph 68 / 69°F 93% 1016 mb
Low level cloud: 48%
Mid level cloud: 70%
High level cloud: 72%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

2 / 3 mph 67 / 67°F 96% 1015 mb
Low level cloud: 77%
Mid level cloud: 77%
High level cloud: 26%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

0 / 1 mph 66 / 66°F 95% 1015 mb
Low level cloud: 65%
Mid level cloud: 91%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

1 / 1 mph 68 / 68°F 96% 1017 mb
Low level cloud: 78%
Mid level cloud: 94%
High level cloud: 22%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

1 / 1 mph 71 / 71°F 90% 1017 mb
Low level cloud: 68%
Mid level cloud: 91%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

0 / 1 mph 74 / 77°F 88% 1014 mb
Low level cloud: 55%
Mid level cloud: 48%
High level cloud: 47%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

1 / 1 mph 75 / 76°F 94% 1015 mb
Low level cloud: 30%
Mid level cloud: 44%
High level cloud: 33%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

2 / 2 mph 70 / 70°F 95% 1016 mb
Low level cloud: 30%
Mid level cloud: 46%
High level cloud: 40%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 07
May
00:00

SSW
SSW

2 / 4 mph 68 / 68°F 94% 1017 mb
Low level cloud: 46%
Mid level cloud: 69%
High level cloud: 31%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

1 / 2 mph 67 / 67°F 92% 1015 mb
Low level cloud: 18%
Mid level cloud: 45%
High level cloud: 36%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

2 / 3 mph 67 / 67°F 95% 1016 mb
Low level cloud: 28%
Mid level cloud: 45%
High level cloud: 8%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

1 / 1 mph 75 / 76°F 82% 1018 mb
Low level cloud: 19%
Mid level cloud: 45%
High level cloud: 28%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

3 / 4 mph 78 / 79°F 73% 1016 mb
Low level cloud: 69%
Mid level cloud: 34%
High level cloud: 29%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

3 / 5 mph 78 / 79°F 79% 1014 mb
Low level cloud: 57%
Mid level cloud: 29%
High level cloud: 30%
Most Significant Cloud Type: low
70%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

SE
SE

2 / 4 mph 75 / 76°F 94% 1015 mb
Low level cloud: 21%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: low
40%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

SSE
SSE

3 / 4 mph 69 / 69°F 96% 1017 mb
Low level cloud: 42%
Mid level cloud: 65%
High level cloud: 20%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 08
May
00:00

SSW
SSW

2 / 4 mph 69 / 69°F 94% 1017 mb
Low level cloud: 22%
Mid level cloud: 46%
High level cloud: 22%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

2 / 4 mph 68 / 68°F 94% 1015 mb
Low level cloud: 23%
Mid level cloud: 45%
High level cloud: 14%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

2 / 3 mph 67 / 67°F 96% 1016 mb
Low level cloud: 36%
Mid level cloud: 46%
High level cloud: 5%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

1 / 2 mph 74 / 76°F 81% 1018 mb
Low level cloud: 5%
Mid level cloud: 19%
High level cloud: 2%
Most Significant Cloud Type: medium
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

3 / 4 mph 80 / 80°F 61% 1016 mb
Low level cloud: 3%
Mid level cloud: 37%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

4 / 6 mph 80 / 80°F 67% 1013 mb
Low level cloud: 16%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

4 / 6 mph 76 / 78°F 87% 1014 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
21:00

SSE
SSE

3 / 5 mph 70 / 70°F 91% 1016 mb
Low level cloud: 8%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 09
May
00:00

S
S

2 / 4 mph 69 / 69°F 90% 1016 mb
Low level cloud: 6%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

2 / 3 mph 67 / 67°F 94% 1014 mb
Low level cloud: 19%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

2 / 4 mph 66 / 66°F 93% 1016 mb
Low level cloud: 17%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

2 / 3 mph 75 / 76°F 76% 1017 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
12:00

SE
SE

3 / 4 mph 81 / 80°F 62% 1015 mb
Low level cloud: 7%
Mid level cloud: 35%
High level cloud: 0%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

4 / 6 mph 81 / 80°F 64% 1012 mb
Low level cloud: 6%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

4 / 6 mph 76 / 77°F 89% 1013 mb
Low level cloud: 8%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

3 / 5 mph 71 / 71°F 94% 1016 mb
Low level cloud: 12%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 10
May
00:00

SSE
SSE

2 / 4 mph 69 / 69°F 95% 1016 mb
Low level cloud: 28%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

2 / 4 mph 67 / 67°F 96% 1015 mb
Low level cloud: 39%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

2 / 4 mph 66 / 66°F 96% 1015 mb
Low level cloud: 34%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

2 / 2 mph 74 / 76°F 80% 1017 mb
Low level cloud: 11%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

4 / 5 mph 80 / 80°F 65% 1015 mb
Low level cloud: 28%
Mid level cloud: 40%
High level cloud: 0%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

4 / 6 mph 80 / 80°F 67% 1013 mb
Low level cloud: 21%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

3 / 4 mph 76 / 77°F 87% 1014 mb
Low level cloud: 1%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

3 / 5 mph 70 / 70°F 91% 1017 mb
Low level cloud: 6%
Mid level cloud: 48%
High level cloud: 1%
Most Significant Cloud Type: medium
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sat 11
May
03:00

SSW
SSW

2 / 4 mph 69 / 69°F 95% 1015 mb
Low level cloud: 31%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
37%
0.0 In
09:00

SE
SE

1 / 3 mph 75 / 78°F 78% 1017 mb
Low level cloud: 9%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
15%
0.0 In
15:00

SE
SE

4 / 8 mph 79 / 84°F 78% 1013 mb
Low level cloud: 20%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
35%
0.0 In
21:00

SSW
SSW

3 / 7 mph 79 / 84°F 86% 1016 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
0.0 In
Sun 12
May
03:00

SW
SW

2 / 4 mph 72 / 76°F 93% 1014 mb
Low level cloud: 14%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
21%
0.0 In
09:00

SE
SE

0 / 1 mph 75 / 79°F 78% 1016 mb
Low level cloud: 8%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
12%
0.0 In
15:00

SE
SE

4 / 9 mph 81 / 85°F 69% 1012 mb
Low level cloud: 10%
Mid level cloud: 44%
High level cloud: 5%
Most Significant Cloud Type: medium
72%
0.0 In
21:00

S
S

2 / 5 mph 74 / 78°F 88% 1016 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
0.0 In
Mon 13
May
03:00

SSW
SSW

2 / 4 mph 72 / 76°F 87% 1014 mb
Low level cloud: 1%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
09:00

SSW
SSW

1 / 2 mph 75 / 78°F 75% 1017 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
15:00

ESE
ESE

5 / 11 mph 79 / 82°F 64% 1011 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 6%
Most Significant Cloud Type: medium
31%
0.0 In
21:00

S
S

3 / 6 mph 72 / 77°F 90% 1016 mb
Low level cloud: 4%
Mid level cloud: 29%
High level cloud: 3%
Most Significant Cloud Type: medium
39%
0.0 In
Tue 14
May
03:00

SSW
SSW

2 / 5 mph 72 / 76°F 91% 1013 mb
Low level cloud: 7%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
11%
0.0 In
09:00

SE
SE

1 / 2 mph 74 / 78°F 77% 1015 mb
Low level cloud: 1%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
0.0 In
15:00

SE
SE

4 / 8 mph 79 / 82°F 65% 1011 mb
Low level cloud: 1%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
48%
0.0 In
21:00

S
S

2 / 5 mph 72 / 76°F 92% 1014 mb
Low level cloud: 12%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
76%
0.1 In
Wed 15
May
03:00

SSW
SSW

2 / 5 mph 72 / 76°F 93% 1013 mb
Low level cloud: 11%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.0 In
09:00

NNW
NNW

0 / 0 mph 75 / 78°F 81% 1015 mb
Low level cloud: 12%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.0 In
15:00

SE
SE

4 / 9 mph 77 / 81°F 74% 1012 mb
Low level cloud: 19%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
34%
0.0 In
21:00

S
S

2 / 5 mph 73 / 77°F 91% 1014 mb
Low level cloud: 7%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
50%
0.1 In
Thu 16
May
03:00

SW
SW

2 / 5 mph 71 / 71°F 93% 1014 mb
Low level cloud: 11%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
22%
0.1 In
09:00

NE
NE

0 / 0 mph 74 / 77°F 81% 1016 mb
Low level cloud: 23%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
26%
0.0 In
15:00

SE
SE

4 / 8 mph 77 / 80°F 66% 1014 mb
Low level cloud: 12%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
78%
0.0 In
21:00

S
S

3 / 6 mph 74 / 78°F 90% 1016 mb
Low level cloud: 1%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
Fri 17
May
03:00

SSW
SSW

3 / 5 mph 69 / 69°F 90% 1016 mb
Low level cloud: 5%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
0.0 In
09:00

S
S

1 / 2 mph 75 / 78°F 79% 1018 mb
Low level cloud: 18%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
20%
0.0 In
15:00

SE
SE

4 / 9 mph 79 / 81°F 57% 1015 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
0.0 In
21:00

SSE
SSE

3 / 6 mph 75 / 79°F 85% 1017 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
Sat 18
May
03:00

SSW
SSW

2 / 5 mph 69 / 69°F 91% 1017 mb
Low level cloud: 15%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
25%
0.0 In
09:00

SSW
SSW

2 / 3 mph 75 / 78°F 79% 1017 mb
Low level cloud: 10%
Mid level cloud: 26%
High level cloud: 4%
Most Significant Cloud Type: low
19%
0.0 In
15:00

SE
SE

4 / 7 mph 79 / 82°F 66% 1014 mb
Low level cloud: 27%
Mid level cloud: 46%
High level cloud: 34%
Most Significant Cloud Type: low
47%
0.0 In
21:00

S
S

2 / 5 mph 75 / 78°F 84% 1016 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 3%
Most Significant Cloud Type: medium
30%
0.0 In
Sun 19
May
03:00

SSW
SSW

3 / 6 mph 69 / 69°F 88% 1015 mb
Low level cloud: 3%
Mid level cloud: 20%
High level cloud: 32%
Most Significant Cloud Type: medium
30%
0.0 In
09:00

SW
SW

1 / 1 mph 75 / 78°F 77% 1016 mb
Low level cloud: 17%
Mid level cloud: 40%
High level cloud: 2%
Most Significant Cloud Type: low
31%
0.0 In
15:00

SSE
SSE

4 / 9 mph 79 / 81°F 60% 1013 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: medium
47%
0.0 In
21:00

SSE
SSE

3 / 7 mph 75 / 79°F 82% 1015 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 3%
Most Significant Cloud Type: medium
19%
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