Local Weather

Ribeirao Das Neves 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Ribeirao Das Neves

Brazil

Long range weather outlook for Ribeirao Das Neves includes 14 day forecast summary:

Over the next 14 days the Ribeirao Das Neves forecast suggests the average daytime maximum temperature will be around 26°C, with a high for the two weeks of 30°C expected on the afternoon of Thursday 29th. The average minimum temperature will be 18°C, dipping to its lowest on the morning of Saturday 24th at 16°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. The indicators are that Thursday 22nd will have the most precipitation with an accumulation of around 98.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Tue 20
Jan
01:00

NNE
NNE

2 / 5 mph 66 / 66°F 92% 1009 mb
Low level cloud: 16%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
44%
Expect 0.04 In of precipitation over the past 3 hours.
0.04 In
04:00

ENE
ENE

2 / 4 mph 66 / 66°F 97% 1008 mb
Low level cloud: 57%
Mid level cloud: 43%
High level cloud: 32%
Most Significant Cloud Type: low
76%
Expect 0.07 In of precipitation over the past 3 hours.
0.07 In
07:00

ENE
ENE

2 / 3 mph 66 / 66°F 97% 1010 mb
Low level cloud: 90%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.11 In of precipitation over the past 3 hours.
0.11 In
10:00

NE
NE

2 / 3 mph 70 / 69°F 92% 1012 mb
Low level cloud: 86%
Mid level cloud: 44%
High level cloud: 13%
Most Significant Cloud Type: low
100%
Expect 0.04 In of precipitation over the past 3 hours.
0.04 In
13:00

SE
SE

5 / 7 mph 71 / 71°F 90% 1012 mb
Low level cloud: 78%
Mid level cloud: 58%
High level cloud: 60%
Most Significant Cloud Type: low
100%
Expect 0.08 In of precipitation over the past 3 hours.
0.08 In
16:00

E
E

4 / 6 mph 72 / 76°F 90% 1010 mb
Low level cloud: 70%
Mid level cloud: 69%
High level cloud: 32%
Most Significant Cloud Type: low
97%
Expect 0.11 In of precipitation over the past 3 hours.
0.11 In
19:00

ENE
ENE

8 / 12 mph 71 / 70°F 98% 1011 mb
Low level cloud: 81%
Mid level cloud: 58%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.21 In of precipitation over the past 3 hours.
0.21 In
22:00

E
E

5 / 7 mph 69 / 69°F 98% 1013 mb
Low level cloud: 69%
Mid level cloud: 76%
High level cloud: 48%
Most Significant Cloud Type: low
100%
Expect 0.13 In of precipitation over the past 3 hours.
0.13 In
Wed 21
Jan
19:00

E
E

9 / 11 mph 68 / 66°F 92% 1012 mb
Low level cloud: 46%
Mid level cloud: 65%
High level cloud: 74%
Most Significant Cloud Type: low
77%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
22:00

E
E

7 / 9 mph 64 / 64°F 98% 1014 mb
Low level cloud: 82%
Mid level cloud: 54%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.38 In of precipitation over the past 3 hours.
0.38 In
Thu 22
Jan
01:00

SE
SE

3 / 4 mph 64 / 64°F 99% 1014 mb
Low level cloud: 91%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.47 In of precipitation over the past 3 hours.
0.47 In
04:00

E
E

4 / 5 mph 64 / 64°F 99% 1011 mb
Low level cloud: 90%
Mid level cloud: 78%
High level cloud: 38%
Most Significant Cloud Type: low
100%
Expect 0.43 In of precipitation over the past 3 hours.
0.43 In
07:00

SSE
SSE

3 / 4 mph 63 / 63°F 99% 1012 mb
Low level cloud: 95%
Mid level cloud: 97%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.65 In of precipitation over the past 3 hours.
0.65 In
10:00

ESE
ESE

4 / 4 mph 66 / 65°F 99% 1014 mb
Low level cloud: 90%
Mid level cloud: 96%
High level cloud: 56%
Most Significant Cloud Type: low
100%
Expect 0.76 In of precipitation over the past 3 hours.
0.76 In
13:00

E
E

5 / 6 mph 68 / 68°F 99% 1013 mb
Low level cloud: 96%
Mid level cloud: 86%
High level cloud: 72%
Most Significant Cloud Type: low
100%
Expect 0.68 In of precipitation over the past 3 hours.
0.68 In
16:00

SSE
SSE

2 / 3 mph 68 / 68°F 99% 1012 mb
Low level cloud: 97%
Mid level cloud: 98%
High level cloud: 57%
Most Significant Cloud Type: low
100%
Expect 0.58 In of precipitation over the past 3 hours.
0.58 In
19:00

ESE
ESE

3 / 4 mph 68 / 68°F 99% 1013 mb
Low level cloud: 95%
Mid level cloud: 94%
High level cloud: 18%
Most Significant Cloud Type: low
100%
Expect 0.24 In of precipitation over the past 3 hours.
0.24 In
22:00

ENE
ENE

4 / 5 mph 66 / 66°F 99% 1014 mb
Low level cloud: 95%
Mid level cloud: 65%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
Fri 23
Jan
01:00

ESE
ESE

2 / 2 mph 65 / 65°F 98% 1014 mb
Low level cloud: 95%
Mid level cloud: 62%
High level cloud: 31%
Most Significant Cloud Type: low
100%
Expect 0.04 In of precipitation over the past 3 hours.
0.04 In
04:00

E
E

2 / 3 mph 65 / 65°F 99% 1013 mb
Low level cloud: 99%
Mid level cloud: 50%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.08 In of precipitation over the past 3 hours.
0.08 In
07:00

ENE
ENE

1 / 2 mph 65 / 64°F 99% 1014 mb
Low level cloud: 97%
Mid level cloud: 92%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.07 In of precipitation over the past 3 hours.
0.07 In
10:00

ENE
ENE

4 / 5 mph 68 / 67°F 96% 1015 mb
Low level cloud: 96%
Mid level cloud: 59%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.07 In of precipitation over the past 3 hours.
0.07 In
13:00

ENE
ENE

2 / 3 mph 70 / 70°F 95% 1015 mb
Low level cloud: 91%
Mid level cloud: 79%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.13 In of precipitation over the past 3 hours.
0.13 In
16:00

NE
NE

3 / 5 mph 73 / 76°F 93% 1013 mb
Low level cloud: 65%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
80%
Expect 0.11 In of precipitation over the past 3 hours.
0.11 In
19:00

NE
NE

4 / 6 mph 74 / 76°F 94% 1013 mb
Low level cloud: 45%
Mid level cloud: 30%
High level cloud: 6%
Most Significant Cloud Type: low
56%
Expect 0.12 In of precipitation over the past 3 hours.
0.12 In
22:00

E
E

4 / 6 mph 68 / 68°F 97% 1015 mb
Low level cloud: 56%
Mid level cloud: 24%
High level cloud: 2%
Most Significant Cloud Type: low
64%
Expect 0.04 In of precipitation over the past 3 hours.
0.04 In
Sat 24
Jan
01:00

E
E

4 / 8 mph 63 / 63°F 98% 1016 mb
Low level cloud: 69%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
78%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
04:00

E
E

4 / 7 mph 62 / 62°F 98% 1014 mb
Low level cloud: 68%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
07:00

ESE
ESE

2 / 4 mph 64 / 62°F 98% 1015 mb
Low level cloud: 65%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
10:00

ENE
ENE

4 / 5 mph 73 / 69°F 90% 1017 mb
Low level cloud: 57%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
73%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
13:00

N
N

8 / 15 mph 74 / 78°F 82% 1016 mb
Low level cloud: 85%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.17 In of precipitation over the past 3 hours.
0.17 In
16:00

NNW
NNW

9 / 16 mph 77 / 78°F 84% 1015 mb
Low level cloud: 43%
Mid level cloud: 45%
High level cloud: 2%
Most Significant Cloud Type: low
58%
Expect 0.21 In of precipitation over the past 3 hours.
0.21 In
19:00

N
N

4 / 7 mph 73 / 69°F 93% 1015 mb
Low level cloud: 18%
Mid level cloud: 23%
High level cloud: 54%
Most Significant Cloud Type: low
32%
Expect 0.11 In of precipitation over the past 3 hours.
0.11 In
22:00

E
E

1 / 2 mph 67 / 67°F 94% 1017 mb
Low level cloud: 24%
Mid level cloud: 32%
High level cloud: 13%
Most Significant Cloud Type: low
36%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Sun 25
Jan
01:00

S
S

3 / 5 mph 65 / 65°F 95% 1017 mb
Low level cloud: 30%
Mid level cloud: 30%
High level cloud: 73%
Most Significant Cloud Type: low
49%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
04:00

ESE
ESE

2 / 4 mph 64 / 64°F 95% 1016 mb
Low level cloud: 33%
Mid level cloud: 29%
High level cloud: 22%
Most Significant Cloud Type: low
45%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
07:00

E
E

3 / 5 mph 66 / 64°F 95% 1017 mb
Low level cloud: 37%
Mid level cloud: 19%
High level cloud: 13%
Most Significant Cloud Type: low
44%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
10:00

E
E

6 / 7 mph 74 / 76°F 87% 1019 mb
Low level cloud: 37%
Mid level cloud: 32%
High level cloud: 1%
Most Significant Cloud Type: low
48%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
13:00

NE
NE

5 / 6 mph 81 / 80°F 70% 1017 mb
Low level cloud: 7%
Mid level cloud: 29%
High level cloud: 3%
Most Significant Cloud Type: medium
48%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
16:00

NE
NE

7 / 9 mph 83 / 83°F 60% 1015 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 9%
Most Significant Cloud Type: medium
46%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
19:00

ENE
ENE

6 / 11 mph 78 / 78°F 83% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 16%
Most Significant Cloud Type: medium
46%
Expect 0.04 In of precipitation over the past 3 hours.
0.04 In
22:00

E
E

6 / 11 mph 67 / 67°F 94% 1017 mb
Low level cloud: 35%
Mid level cloud: 25%
High level cloud: 11%
Most Significant Cloud Type: low
44%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Mon 26
Jan
01:00

E
E

4 / 7 mph 66 / 66°F 95% 1018 mb
Low level cloud: 36%
Mid level cloud: 30%
High level cloud: 17%
Most Significant Cloud Type: low
48%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
04:00

SE
SE

5 / 10 mph 64 / 64°F 94% 1016 mb
Low level cloud: 30%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
50%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
07:00

E
E

4 / 7 mph 67 / 64°F 95% 1019 mb
Low level cloud: 37%
Mid level cloud: 23%
High level cloud: 79%
Most Significant Cloud Type: low
54%
Expect 0.05 In of precipitation over the past 3 hours.
0.05 In
10:00

ENE
ENE

7 / 8 mph 75 / 76°F 79% 1019 mb
Low level cloud: 4%
Mid level cloud: 9%
High level cloud: 56%
Most Significant Cloud Type: medium
23%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
13:00

NE
NE

7 / 8 mph 83 / 82°F 63% 1018 mb
Low level cloud: 0%
Mid level cloud: 41%
High level cloud: 64%
Most Significant Cloud Type: medium
43%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
16:00

NNE
NNE

7 / 8 mph 85 / 84°F 57% 1015 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 26%
Most Significant Cloud Type: medium
26%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
19:00

NE
NE

6 / 10 mph 78 / 79°F 80% 1015 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 16%
Most Significant Cloud Type: medium
20%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
22:00

E
E

5 / 11 mph 69 / 69°F 88% 1018 mb
Low level cloud: 3%
Mid level cloud: 12%
High level cloud: 32%
Most Significant Cloud Type: medium
21%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Tue 27
Jan
04:00

E
E

4 / 9 mph 67 / 67°F 96% 1016 mb
Low level cloud: 44%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
47%
0.00 In
10:00

ENE
ENE

10 / 21 mph 75 / 78°F 70% 1018 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.00 In
16:00

NNE
NNE

6 / 13 mph 88 / 96°F 61% 1014 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
0.00 In
22:00

ESE
ESE

6 / 13 mph 70 / 70°F 89% 1017 mb
Low level cloud: 6%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
33%
0.00 In
Wed 28
Jan
04:00

SE
SE

3 / 6 mph 68 / 68°F 92% 1017 mb
Low level cloud: 9%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
12%
0.00 In
10:00

E
E

7 / 14 mph 77 / 80°F 70% 1019 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 13%
Most Significant Cloud Type: medium
3%
0.00 In
16:00

NE
NE

7 / 14 mph 86 / 90°F 51% 1016 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
0.00 In
22:00

E
E

4 / 8 mph 75 / 79°F 84% 1018 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
0.00 In
Thu 29
Jan
04:00

ESE
ESE

3 / 6 mph 70 / 70°F 92% 1017 mb
Low level cloud: 11%
Mid level cloud: 20%
High level cloud: 6%
Most Significant Cloud Type: low
18%
0.00 In
10:00

ENE
ENE

5 / 10 mph 77 / 80°F 75% 1019 mb
Low level cloud: 26%
Mid level cloud: 7%
High level cloud: 5%
Most Significant Cloud Type: low
29%
0.00 In
16:00

NE
NE

7 / 14 mph 89 / 93°F 51% 1015 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 4%
Most Significant Cloud Type: medium
17%
0.00 In
22:00

ENE
ENE

4 / 9 mph 75 / 78°F 74% 1015 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.00 In
Fri 30
Jan
04:00

ESE
ESE

2 / 5 mph 69 / 69°F 94% 1015 mb
Low level cloud: 23%
Mid level cloud: 5%
High level cloud: 7%
Most Significant Cloud Type: low
25%
0.00 In
10:00

NNE
NNE

5 / 11 mph 78 / 81°F 68% 1016 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.00 In
16:00

N
N

6 / 13 mph 88 / 93°F 52% 1013 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
0.00 In
22:00

NE
NE

2 / 4 mph 77 / 80°F 72% 1012 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.00 In
Sat 31
Jan
04:00

E
E

2 / 5 mph 73 / 77°F 92% 1014 mb
Low level cloud: 13%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
17%
0.04 In
10:00

NNW
NNW

5 / 10 mph 81 / 84°F 65% 1013 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.00 In
16:00

NNW
NNW

6 / 12 mph 93 / 101°F 47% 1011 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 16%
Most Significant Cloud Type: medium
11%
0.00 In
22:00

SSW
SSW

7 / 16 mph 68 / 68°F 92% 1014 mb
Low level cloud: 21%
Mid level cloud: 25%
High level cloud: 99%
Most Significant Cloud Type: low
41%
0.09 In
Sun 01
Feb
04:00

ESE
ESE

2 / 3 mph 72 / 76°F 84% 1013 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 7%
Most Significant Cloud Type: medium
8%
0.07 In
10:00

NNE
NNE

4 / 7 mph 78 / 82°F 77% 1015 mb
Low level cloud: 1%
Mid level cloud: 13%
High level cloud: 8%
Most Significant Cloud Type: medium
16%
0.04 In
16:00

NW
NW

7 / 16 mph 93 / 100°F 47% 1010 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
0.00 In
22:00

E
E

1 / 2 mph 78 / 83°F 88% 1013 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 17%
Most Significant Cloud Type: medium
21%
0.24 In
Mon 02
Feb
04:00

ESE
ESE

3 / 6 mph 70 / 70°F 93% 1013 mb
Low level cloud: 17%
Mid level cloud: 24%
High level cloud: 15%
Most Significant Cloud Type: low
26%
0.12 In
10:00

NNE
NNE

4 / 9 mph 74 / 78°F 88% 1016 mb
Low level cloud: 24%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: low
43%
0.17 In
16:00

NW
NW

7 / 14 mph 83 / 88°F 65% 1010 mb
Low level cloud: 0%
Mid level cloud: 54%
High level cloud: 6%
Most Significant Cloud Type: medium
54%
0.02 In
22:00

E
E

3 / 6 mph 70 / 70°F 97% 1015 mb
Low level cloud: 54%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
81%
0.32 In
Tue 03
Feb
04:00

SSE
SSE

3 / 7 mph 71 / 71°F 92% 1010 mb
Low level cloud: 18%
Mid level cloud: 44%
High level cloud: 39%
Most Significant Cloud Type: low
37%
0.16 In
10:00

WNW
WNW

2 / 4 mph 73 / 77°F 89% 1015 mb
Low level cloud: 23%
Mid level cloud: 27%
High level cloud: 55%
Most Significant Cloud Type: low
39%
0.00 In
16:00

NNW
NNW

4 / 9 mph 80 / 86°F 82% 1009 mb
Low level cloud: 18%
Mid level cloud: 27%
High level cloud: 41%
Most Significant Cloud Type: low
32%
0.27 In
22:00

ENE
ENE

1 / 2 mph 73 / 77°F 90% 1014 mb
Low level cloud: 5%
Mid level cloud: 44%
High level cloud: 44%
Most Significant Cloud Type: medium
59%
0.22 In
Wed 04
Feb
04:00

N
N

2 / 5 mph 73 / 77°F 93% 1008 mb
Low level cloud: 23%
Mid level cloud: 46%
High level cloud: 47%
Most Significant Cloud Type: low
44%
0.03 In
10:00

N
N

3 / 7 mph 76 / 80°F 82% 1014 mb
Low level cloud: 33%
Mid level cloud: 31%
High level cloud: 32%
Most Significant Cloud Type: low
47%
0.02 In
16:00

WNW
WNW

7 / 15 mph 81 / 87°F 78% 1006 mb
Low level cloud: 5%
Mid level cloud: 36%
High level cloud: 99%
Most Significant Cloud Type: medium
52%
0.13 In
22:00

ENE
ENE

2 / 4 mph 75 / 79°F 89% 1012 mb
Low level cloud: 1%
Mid level cloud: 26%
High level cloud: 35%
Most Significant Cloud Type: medium
31%
0.28 In

Other Locations Near to Ribeirao Das Neves

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