WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Huarmaca 14 Day Long Range Forecast

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

Peru

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

Over the next 14 days the Huarmaca forecast suggests the average daytime maximum temperature will be around 21°C, with a high for the two weeks of 22°C expected on the afternoon of Saturday 11th. The mean minimum temperature will be 16°C, dipping to its lowest on the evening of Tuesday 7th at 13°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. It looks like Thursday 9th will have the most precipitation with an accumulation of around 7.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 05
May
01:00

NE
NE

2 / 2 mph 64 / 64°F 88% 1014 mb
Low level cloud: 6%
Mid level cloud: 46%
High level cloud: 4%
Most Significant Cloud Type: medium
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

E
E

3 / 4 mph 62 / 62°F 86% 1014 mb
Low level cloud: 2%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ENE
ENE

4 / 7 mph 65 / 62°F 83% 1014 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

1 / 1 mph 69 / 67°F 62% 1014 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

4 / 7 mph 73 / 76°F 57% 1011 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

6 / 11 mph 70 / 68°F 64% 1010 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 19%
Most Significant Cloud Type: medium
45%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

WNW
WNW

1 / 2 mph 65 / 65°F 81% 1012 mb
Low level cloud: 2%
Mid level cloud: 27%
High level cloud: 32%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

2 / 4 mph 64 / 64°F 83% 1014 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 99%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 06
May
19:00

W
W

2 / 5 mph 61 / 61°F 83% 1013 mb
Low level cloud: 13%
Mid level cloud: 46%
High level cloud: 5%
Most Significant Cloud Type: medium
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

0 / 0 mph 62 / 62°F 87% 1015 mb
Low level cloud: 9%
Mid level cloud: 40%
High level cloud: 32%
Most Significant Cloud Type: medium
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 07
May
01:00

WSW
WSW

1 / 1 mph 60 / 60°F 88% 1014 mb
Low level cloud: 19%
Mid level cloud: 44%
High level cloud: 8%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SE
SE

0 / 0 mph 61 / 61°F 87% 1013 mb
Low level cloud: 6%
Mid level cloud: 46%
High level cloud: 5%
Most Significant Cloud Type: medium
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ESE
ESE

1 / 2 mph 62 / 60°F 85% 1014 mb
Low level cloud: 6%
Mid level cloud: 65%
High level cloud: 13%
Most Significant Cloud Type: medium
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

3 / 6 mph 63 / 61°F 77% 1015 mb
Low level cloud: 0%
Mid level cloud: 70%
High level cloud: 2%
Most Significant Cloud Type: medium
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

5 / 10 mph 66 / 64°F 72% 1013 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

5 / 11 mph 62 / 62°F 79% 1011 mb
Low level cloud: 18%
Mid level cloud: 52%
High level cloud: 3%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

3 / 6 mph 59 / 60°F 88% 1013 mb
Low level cloud: 44%
Mid level cloud: 91%
High level cloud: 0%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

1 / 1 mph 59 / 59°F 89% 1015 mb
Low level cloud: 27%
Mid level cloud: 57%
High level cloud: 3%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 08
May
01:00

NNE
NNE

1 / 3 mph 61 / 61°F 86% 1014 mb
Low level cloud: 5%
Mid level cloud: 45%
High level cloud: 26%
Most Significant Cloud Type: medium
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WNW
WNW

1 / 2 mph 59 / 59°F 91% 1014 mb
Low level cloud: 33%
Mid level cloud: 63%
High level cloud: 9%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

E
E

0 / 0 mph 60 / 59°F 89% 1014 mb
Low level cloud: 23%
Mid level cloud: 44%
High level cloud: 19%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

2 / 4 mph 64 / 62°F 73% 1014 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
13:00

WNW
WNW

4 / 8 mph 67 / 65°F 70% 1012 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 5%
Most Significant Cloud Type: medium
44%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

WSW
WSW

6 / 12 mph 66 / 64°F 74% 1011 mb
Low level cloud: 4%
Mid level cloud: 46%
High level cloud: 10%
Most Significant Cloud Type: medium
58%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

W
W

2 / 5 mph 61 / 61°F 85% 1013 mb
Low level cloud: 27%
Mid level cloud: 44%
High level cloud: 10%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

1 / 2 mph 62 / 62°F 84% 1014 mb
Low level cloud: 5%
Mid level cloud: 49%
High level cloud: 11%
Most Significant Cloud Type: medium
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 09
May
01:00

ENE
ENE

2 / 3 mph 63 / 63°F 85% 1014 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 28%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

E
E

2 / 3 mph 62 / 62°F 85% 1014 mb
Low level cloud: 2%
Mid level cloud: 43%
High level cloud: 68%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ENE
ENE

3 / 5 mph 63 / 61°F 83% 1015 mb
Low level cloud: 2%
Mid level cloud: 46%
High level cloud: 76%
Most Significant Cloud Type: medium
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

1 / 2 mph 68 / 66°F 63% 1015 mb
Low level cloud: 0%
Mid level cloud: 42%
High level cloud: 17%
Most Significant Cloud Type: medium
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

6 / 10 mph 72 / 69°F 61% 1012 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 12%
Most Significant Cloud Type: medium
44%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

W
W

4 / 9 mph 68 / 66°F 71% 1011 mb
Low level cloud: 0%
Mid level cloud: 40%
High level cloud: 29%
Most Significant Cloud Type: medium
41%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

NE
NE

1 / 2 mph 65 / 65°F 83% 1013 mb
Low level cloud: 9%
Mid level cloud: 44%
High level cloud: 50%
Most Significant Cloud Type: medium
70%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

E
E

2 / 3 mph 64 / 64°F 82% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 39%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 10
May
01:00

E
E

3 / 4 mph 63 / 63°F 82% 1014 mb
Low level cloud: 1%
Mid level cloud: 57%
High level cloud: 38%
Most Significant Cloud Type: medium
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

3 / 6 mph 60 / 60°F 85% 1014 mb
Low level cloud: 8%
Mid level cloud: 60%
High level cloud: 32%
Most Significant Cloud Type: medium
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

E
E

5 / 10 mph 63 / 60°F 86% 1015 mb
Low level cloud: 6%
Mid level cloud: 50%
High level cloud: 34%
Most Significant Cloud Type: medium
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

4 / 10 mph 63 / 60°F 76% 1016 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 47%
Most Significant Cloud Type: medium
47%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
13:00

E
E

2 / 4 mph 67 / 64°F 66% 1013 mb
Low level cloud: 0%
Mid level cloud: 58%
High level cloud: 19%
Most Significant Cloud Type: medium
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

1 / 2 mph 67 / 64°F 66% 1011 mb
Low level cloud: 0%
Mid level cloud: 40%
High level cloud: 15%
Most Significant Cloud Type: medium
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

E
E

2 / 2 mph 64 / 64°F 83% 1013 mb
Low level cloud: 1%
Mid level cloud: 25%
High level cloud: 17%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

4 / 6 mph 63 / 63°F 85% 1016 mb
Low level cloud: 2%
Mid level cloud: 24%
High level cloud: 15%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 11
May
01:00

ENE
ENE

4 / 6 mph 62 / 62°F 85% 1015 mb
Low level cloud: 1%
Mid level cloud: 17%
High level cloud: 16%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

E
E

4 / 6 mph 62 / 62°F 84% 1014 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 16%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

E
E

4 / 7 mph 64 / 62°F 82% 1015 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 21%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

1 / 2 mph 69 / 66°F 57% 1014 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 22%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

7 / 13 mph 72 / 76°F 54% 1011 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 32%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

7 / 13 mph 69 / 67°F 64% 1010 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 13%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WNW
WNW

2 / 3 mph 64 / 64°F 81% 1013 mb
Low level cloud: 3%
Mid level cloud: 27%
High level cloud: 6%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

1 / 2 mph 64 / 64°F 83% 1015 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 17%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 12
May
01:00

ESE
ESE

0 / 1 mph 67 / 67°F 86% 1015 mb
Low level cloud: 2%
Mid level cloud: 32%
High level cloud: 7%
Most Significant Cloud Type: medium
38%
0.0 In
07:00

ENE
ENE

5 / 10 mph 62 / 62°F 87% 1014 mb
Low level cloud: 6%
Mid level cloud: 15%
High level cloud: 16%
Most Significant Cloud Type: low
13%
0.0 In
13:00

W
W

7 / 15 mph 69 / 69°F 61% 1012 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 7%
Most Significant Cloud Type: medium
16%
0.0 In
19:00

W
W

3 / 7 mph 63 / 63°F 80% 1013 mb
Low level cloud: 5%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
60%
0.0 In
Mon 13
May
01:00

E
E

2 / 5 mph 65 / 65°F 88% 1015 mb
Low level cloud: 4%
Mid level cloud: 26%
High level cloud: 9%
Most Significant Cloud Type: medium
37%
0.0 In
07:00

E
E

5 / 10 mph 61 / 61°F 85% 1016 mb
Low level cloud: 4%
Mid level cloud: 24%
High level cloud: 15%
Most Significant Cloud Type: medium
35%
0.0 In
13:00

W
W

4 / 8 mph 67 / 67°F 62% 1014 mb
Low level cloud: 0%
Mid level cloud: 35%
High level cloud: 39%
Most Significant Cloud Type: medium
36%
0.0 In
19:00

WSW
WSW

1 / 2 mph 63 / 63°F 83% 1014 mb
Low level cloud: 11%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: medium
76%
0.2 In
Tue 14
May
01:00

ENE
ENE

4 / 9 mph 66 / 66°F 83% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: medium
46%
0.1 In
07:00

E
E

3 / 6 mph 60 / 60°F 86% 1016 mb
Low level cloud: 6%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: medium
63%
0.0 In
13:00

WSW
WSW

6 / 13 mph 69 / 69°F 61% 1013 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 32%
Most Significant Cloud Type: medium
30%
0.0 In
19:00

WSW
WSW

1 / 2 mph 63 / 64°F 86% 1014 mb
Low level cloud: 29%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: low
49%
0.2 In
Wed 15
May
01:00

ENE
ENE

2 / 5 mph 67 / 67°F 87% 1015 mb
Low level cloud: 3%
Mid level cloud: 23%
High level cloud: 49%
Most Significant Cloud Type: medium
33%
0.1 In
07:00

E
E

2 / 5 mph 63 / 63°F 87% 1013 mb
Low level cloud: 6%
Mid level cloud: 26%
High level cloud: 8%
Most Significant Cloud Type: medium
44%
0.1 In
13:00

W
W

7 / 14 mph 68 / 68°F 63% 1012 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 5%
Most Significant Cloud Type: medium
28%
0.0 In
19:00

WSW
WSW

2 / 4 mph 64 / 64°F 83% 1012 mb
Low level cloud: 10%
Mid level cloud: 38%
High level cloud: 15%
Most Significant Cloud Type: medium
67%
0.1 In
Thu 16
May
01:00

ENE
ENE

2 / 5 mph 67 / 67°F 85% 1014 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 11%
Most Significant Cloud Type: medium
28%
0.1 In
07:00

E
E

5 / 10 mph 61 / 60°F 85% 1014 mb
Low level cloud: 5%
Mid level cloud: 20%
High level cloud: 1%
Most Significant Cloud Type: medium
35%
0.0 In
13:00

WSW
WSW

6 / 13 mph 68 / 68°F 62% 1013 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 2%
Most Significant Cloud Type: medium
43%
0.1 In
19:00

W
W

2 / 4 mph 65 / 65°F 81% 1012 mb
Low level cloud: 4%
Mid level cloud: 29%
High level cloud: 39%
Most Significant Cloud Type: medium
42%
0.1 In
Fri 17
May
01:00

E
E

4 / 8 mph 68 / 68°F 83% 1014 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 10%
Most Significant Cloud Type: medium
18%
0.1 In
07:00

E
E

4 / 9 mph 62 / 62°F 82% 1014 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: medium
48%
0.0 In
13:00

WSW
WSW

5 / 11 mph 70 / 70°F 59% 1012 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
0.0 In
19:00

ENE
ENE

2 / 4 mph 68 / 68°F 80% 1014 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 61%
Most Significant Cloud Type: medium
29%
0.1 In
Sat 18
May
01:00

ENE
ENE

3 / 6 mph 65 / 65°F 85% 1015 mb
Low level cloud: 1%
Mid level cloud: 28%
High level cloud: 11%
Most Significant Cloud Type: medium
30%
0.2 In
07:00

E
E

5 / 11 mph 62 / 62°F 84% 1015 mb
Low level cloud: 3%
Mid level cloud: 44%
High level cloud: 20%
Most Significant Cloud Type: medium
53%
0.0 In
13:00

WSW
WSW

4 / 9 mph 71 / 71°F 57% 1012 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 8%
Most Significant Cloud Type: medium
30%
0.0 In
19:00

ENE
ENE

0 / 1 mph 66 / 66°F 84% 1014 mb
Low level cloud: 6%
Mid level cloud: 38%
High level cloud: 10%
Most Significant Cloud Type: medium
56%
0.2 In
Sun 19
May
01:00

E
E

5 / 11 mph 65 / 65°F 85% 1014 mb
Low level cloud: 3%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: medium
54%
0.2 In
07:00

E
E

5 / 10 mph 62 / 62°F 84% 1015 mb
Low level cloud: 2%
Mid level cloud: 31%
High level cloud: 8%
Most Significant Cloud Type: medium
36%
0.0 In
13:00

WSW
WSW

5 / 11 mph 71 / 71°F 54% 1010 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 8%
Most Significant Cloud Type: medium
19%
0.0 In
19:00

NW
NW

1 / 2 mph 65 / 65°F 83% 1013 mb
Low level cloud: 9%
Mid level cloud: 30%
High level cloud: 11%
Most Significant Cloud Type: medium
57%
0.2 In
Mon 20
May
01:00

ENE
ENE

4 / 9 mph 65 / 65°F 86% 1013 mb
Low level cloud: 5%
Mid level cloud: 26%
High level cloud: 7%
Most Significant Cloud Type: medium
39%
0.1 In
07:00

ENE
ENE

3 / 7 mph 63 / 63°F 84% 1014 mb
Low level cloud: 1%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
0.0 In
13:00

WSW
WSW

6 / 12 mph 70 / 70°F 54% 1010 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 10%
Most Significant Cloud Type: medium
16%
0.0 In
19:00

W
W

2 / 3 mph 64 / 64°F 81% 1013 mb
Low level cloud: 7%
Mid level cloud: 31%
High level cloud: 16%
Most Significant Cloud Type: medium
50%
0.1 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