Local Weather

Coca 14 Day Long Range Forecast

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

Ecuador

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

The next 14 day outlook for Coca shows the average daytime maximum temperature will be around 27°C, with a high for the two weeks of 31°C expected on the afternoon of Tuesday 23rd. The average minimum temperature will be 21°C, dipping to its lowest on the morning of Thursday 25th at 15°C. The next 14 days will have some days seeing a little precipitation and some days with rain. Current predictions suggest Thursday 25th will have the most precipitation with an accumulation of around 15.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 18
Jul
01:00

WSW
WSW

2 / 4 mph 72 / 76°F 87% 1018 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
04:00

SE
SE

1 / 1 mph 71 / 71°F 86% 1017 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
07:00

S
S

1 / 2 mph 74 / 76°F 85% 1018 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
10:00

SSW
SSW

2 / 4 mph 69 / 66°F 70% 1019 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
13:00

S
S

2 / 3 mph 75 / 76°F 54% 1016 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
16:00

ESE
ESE

1 / 2 mph 78 / 77°F 57% 1013 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
19:00

NNE
NNE

2 / 4 mph 75 / 78°F 83% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 14%
Most Significant Cloud Type: medium
45%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
22:00

N
N

1 / 3 mph 73 / 77°F 86% 1017 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 14%
Most Significant Cloud Type: medium
23%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Fri 19
Jul
19:00

ESE
ESE

1 / 2 mph 76 / 80°F 83% 1014 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
22:00

NNW
NNW

1 / 2 mph 75 / 78°F 84% 1016 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Sat 20
Jul
01:00

NW
NW

1 / 2 mph 73 / 77°F 89% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
04:00

NNW
NNW

2 / 4 mph 72 / 72°F 97% 1015 mb
Low level cloud: 18%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
33%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
07:00

WNW
WNW

2 / 3 mph 74 / 76°F 96% 1017 mb
Low level cloud: 25%
Mid level cloud: 53%
High level cloud: 0%
Most Significant Cloud Type: low
43%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
10:00

N
N

1 / 3 mph 64 / 64°F 89% 1018 mb
Low level cloud: 18%
Mid level cloud: 54%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
13:00

NE
NE

2 / 4 mph 77 / 79°F 95% 1016 mb
Low level cloud: 0%
Mid level cloud: 39%
High level cloud: 0%
Most Significant Cloud Type: medium
38%
Expect 0.06 In of precipitation over the past 3 hours.
0.06 In
16:00

NNE
NNE

1 / 3 mph 73 / 70°F 84% 1014 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
33%
Expect 0.06 In of precipitation over the past 3 hours.
0.06 In
19:00

NNE
NNE

3 / 5 mph 73 / 77°F 95% 1015 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
22:00

NNW
NNW

1 / 2 mph 72 / 76°F 96% 1017 mb
Low level cloud: 0%
Mid level cloud: 36%
High level cloud: 0%
Most Significant Cloud Type: medium
36%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Sun 21
Jul
01:00

NW
NW

2 / 3 mph 71 / 71°F 96% 1016 mb
Low level cloud: 1%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
48%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
04:00

NNW
NNW

2 / 4 mph 70 / 70°F 97% 1015 mb
Low level cloud: 5%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
58%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
07:00

NW
NW

2 / 4 mph 74 / 76°F 95% 1015 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 3%
Most Significant Cloud Type: medium
46%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
10:00

NNW
NNW

2 / 5 mph 76 / 77°F 57% 1016 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 3%
Most Significant Cloud Type: medium
45%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
13:00

NNE
NNE

2 / 4 mph 78 / 77°F 55% 1014 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
16:00

SW
SW

0 / 0 mph 80 / 79°F 48% 1011 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
19:00

WNW
WNW

1 / 2 mph 77 / 81°F 75% 1012 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
22:00

NNW
NNW

4 / 7 mph 72 / 76°F 90% 1014 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
Mon 22
Jul
01:00

NW
NW

2 / 3 mph 71 / 71°F 98% 1013 mb
Low level cloud: 12%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
20%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
04:00

WNW
WNW

2 / 3 mph 71 / 71°F 99% 1013 mb
Low level cloud: 5%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
59%
Expect 0.05 In of precipitation over the past 3 hours.
0.05 In
07:00

W
W

1 / 2 mph 75 / 76°F 98% 1014 mb
Low level cloud: 10%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
10:00

NE
NE

2 / 3 mph 73 / 69°F 74% 1016 mb
Low level cloud: 7%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
50%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
13:00

NNW
NNW

1 / 2 mph 85 / 82°F 46% 1013 mb
Low level cloud: 6%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
16:00

ESE
ESE

3 / 6 mph 86 / 89°F 73% 1011 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
19:00

E
E

2 / 4 mph 77 / 81°F 89% 1012 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
22:00

ESE
ESE

1 / 2 mph 74 / 78°F 90% 1014 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Tue 23
Jul
01:00

NW
NW

2 / 5 mph 72 / 76°F 95% 1014 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
04:00

NW
NW

3 / 5 mph 70 / 70°F 99% 1014 mb
Low level cloud: 15%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
20%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
07:00

WNW
WNW

2 / 3 mph 74 / 76°F 94% 1016 mb
Low level cloud: 11%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
15%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
10:00

WNW
WNW

1 / 3 mph 78 / 78°F 58% 1017 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
13:00

NE
NE

2 / 5 mph 85 / 82°F 43% 1014 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
16:00

E
E

1 / 1 mph 88 / 90°F 63% 1012 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
19:00

N
N

2 / 4 mph 77 / 82°F 85% 1013 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
22:00

E
E

2 / 4 mph 73 / 78°F 96% 1015 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 33%
Most Significant Cloud Type: medium
32%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
Wed 24
Jul
01:00

NNW
NNW

0 / 1 mph 73 / 77°F 98% 1015 mb
Low level cloud: 1%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
Expect 0.09 In of precipitation over the past 3 hours.
0.09 In
04:00

NW
NW

2 / 3 mph 71 / 71°F 99% 1015 mb
Low level cloud: 10%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
73%
Expect 0.05 In of precipitation over the past 3 hours.
0.05 In
07:00

WSW
WSW

1 / 2 mph 73 / 76°F 98% 1016 mb
Low level cloud: 11%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
76%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
10:00

NW
NW

1 / 2 mph 78 / 77°F 62% 1018 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
13:00

NW
NW

1 / 2 mph 86 / 83°F 45% 1015 mb
Low level cloud: 1%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
47%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
16:00

ESE
ESE

1 / 2 mph 87 / 90°F 70% 1012 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
19:00

S
S

3 / 6 mph 77 / 82°F 86% 1013 mb
Low level cloud: 0%
Mid level cloud: 35%
High level cloud: 0%
Most Significant Cloud Type: medium
34%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
22:00

ENE
ENE

2 / 4 mph 74 / 78°F 97% 1016 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 12%
Most Significant Cloud Type: medium
22%
Expect 0.05 In of precipitation over the past 3 hours.
0.05 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 25
Jul
01:00

N
N

2 / 4 mph 74 / 78°F 100% 1015 mb
Low level cloud: 51%
Mid level cloud: 32%
High level cloud: 69%
Most Significant Cloud Type: low
100%
0.00 In
07:00

NNW
NNW

2 / 5 mph 67 / 67°F 99% 1015 mb
Low level cloud: 66%
Mid level cloud: 43%
High level cloud: 6%
Most Significant Cloud Type: low
100%
0.00 In
13:00

NNW
NNW

3 / 6 mph 77 / 80°F 61% 1014 mb
Low level cloud: 32%
Mid level cloud: 45%
High level cloud: 11%
Most Significant Cloud Type: low
48%
0.00 In
19:00

E
E

3 / 6 mph 74 / 79°F 96% 1013 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 7%
Most Significant Cloud Type: medium
46%
0.00 In
Fri 26
Jul
01:00

N
N

2 / 4 mph 73 / 77°F 99% 1014 mb
Low level cloud: 32%
Mid level cloud: 44%
High level cloud: 1%
Most Significant Cloud Type: low
100%
0.00 In
07:00

NNW
NNW

2 / 4 mph 68 / 68°F 99% 1014 mb
Low level cloud: 48%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.00 In
13:00

NNE
NNE

3 / 7 mph 79 / 80°F 54% 1013 mb
Low level cloud: 45%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
55%
0.00 In
19:00

WNW
WNW

1 / 1 mph 76 / 80°F 88% 1012 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
0.00 In
Sat 27
Jul
01:00

WNW
WNW

3 / 5 mph 72 / 77°F 98% 1012 mb
Low level cloud: 4%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
0.15 In
07:00

NW
NW

0 / 0 mph 71 / 71°F 99% 1015 mb
Low level cloud: 23%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
34%
0.10 In
13:00

SE
SE

2 / 3 mph 71 / 71°F 87% 1013 mb
Low level cloud: 0%
Mid level cloud: 77%
High level cloud: 0%
Most Significant Cloud Type: medium
76%
0.25 In
19:00

N
N

1 / 1 mph 74 / 79°F 96% 1013 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 7%
Most Significant Cloud Type: medium
24%
0.30 In
Sun 28
Jul
01:00

W
W

1 / 3 mph 73 / 77°F 94% 1014 mb
Low level cloud: 9%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: medium
71%
0.09 In
07:00

W
W

2 / 3 mph 72 / 76°F 99% 1016 mb
Low level cloud: 46%
Mid level cloud: 60%
High level cloud: 27%
Most Significant Cloud Type: low
69%
0.03 In
13:00

WSW
WSW

4 / 8 mph 65 / 65°F 93% 1015 mb
Low level cloud: 46%
Mid level cloud: 44%
High level cloud: 12%
Most Significant Cloud Type: low
63%
0.17 In
19:00

SW
SW

3 / 6 mph 73 / 77°F 95% 1015 mb
Low level cloud: 21%
Mid level cloud: 63%
High level cloud: 10%
Most Significant Cloud Type: medium
100%
0.46 In
Mon 29
Jul
01:00

SSW
SSW

2 / 4 mph 70 / 70°F 99% 1015 mb
Low level cloud: 24%
Mid level cloud: 68%
High level cloud: 27%
Most Significant Cloud Type: medium
100%
0.05 In
07:00

SSW
SSW

2 / 3 mph 63 / 63°F 99% 1017 mb
Low level cloud: 76%
Mid level cloud: 86%
High level cloud: 18%
Most Significant Cloud Type: low
100%
0.14 In
13:00

S
S

4 / 8 mph 61 / 61°F 99% 1017 mb
Low level cloud: 97%
Mid level cloud: 88%
High level cloud: 84%
Most Significant Cloud Type: low
100%
0.47 In
19:00

NW
NW

3 / 5 mph 67 / 67°F 100% 1016 mb
Low level cloud: 68%
Mid level cloud: 44%
High level cloud: 1%
Most Significant Cloud Type: low
83%
0.31 In
Tue 30
Jul
01:00

SW
SW

1 / 2 mph 65 / 65°F 99% 1017 mb
Low level cloud: 36%
Mid level cloud: 55%
High level cloud: 16%
Most Significant Cloud Type: low
57%
0.61 In
07:00

SW
SW

2 / 3 mph 70 / 70°F 99% 1017 mb
Low level cloud: 40%
Mid level cloud: 76%
High level cloud: 0%
Most Significant Cloud Type: low
66%
0.02 In
13:00

WSW
WSW

4 / 7 mph 68 / 68°F 79% 1018 mb
Low level cloud: 33%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
48%
0.00 In
19:00

NNW
NNW

3 / 6 mph 74 / 79°F 97% 1016 mb
Low level cloud: 35%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
50%
0.07 In
Wed 31
Jul
01:00

NNW
NNW

2 / 4 mph 64 / 64°F 97% 1016 mb
Low level cloud: 33%
Mid level cloud: 32%
High level cloud: 7%
Most Significant Cloud Type: low
45%
0.01 In
07:00

WSW
WSW

1 / 2 mph 69 / 69°F 93% 1016 mb
Low level cloud: 4%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: medium
58%
0.00 In
13:00

WNW
WNW

1 / 2 mph 69 / 69°F 66% 1016 mb
Low level cloud: 3%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
53%
0.00 In
19:00

NE
NE

2 / 5 mph 74 / 78°F 97% 1017 mb
Low level cloud: 21%
Mid level cloud: 64%
High level cloud: 6%
Most Significant Cloud Type: medium
100%
0.02 In
Thu 01
Aug
01:00

NW
NW

1 / 3 mph 70 / 70°F 92% 1016 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
0.00 In
07:00

NNE
NNE

1 / 2 mph 70 / 70°F 97% 1016 mb
Low level cloud: 5%
Mid level cloud: 46%
High level cloud: 12%
Most Significant Cloud Type: medium
59%
0.01 In
13:00

NNE
NNE

4 / 8 mph 75 / 77°F 56% 1015 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
0.00 In
19:00

NW
NW

3 / 7 mph 70 / 70°F 97% 1016 mb
Low level cloud: 8%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.00 In
Fri 02
Aug
01:00

NE
NE

2 / 4 mph 72 / 76°F 86% 1015 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
0.00 In
07:00

NNW
NNW

1 / 3 mph 70 / 70°F 91% 1017 mb
Low level cloud: 5%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
57%
0.00 In
13:00

WSW
WSW

5 / 10 mph 75 / 78°F 54% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
0.00 In
19:00

SE
SE

2 / 4 mph 72 / 72°F 97% 1014 mb
Low level cloud: 0%
Mid level cloud: 38%
High level cloud: 0%
Most Significant Cloud Type: medium
38%
0.12 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