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Copiapo 14 Day Long Range Forecast

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

Chile

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

The next 14 day outlook for Copiapo shows the average daytime maximum temperature will be around 26°C, with a high for the two weeks of 32°C expected on the afternoon of Monday 27th. The average minimum temperature will be 11°C, dipping to its lowest on the morning of Thursday 23rd at 7°C. The next 14 days will remain predominantly dry. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 19
May		02:00

ESE
ESE

 4 / 9 mph 50 / 49°F 45% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 20%
Most Significant Cloud Type: high
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

ESE
ESE

 6 / 12 mph 52 / 50°F 36% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: high
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

ENE
ENE

 4 / 9 mph 57 / 55°F 23% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 54%
Most Significant Cloud Type: high
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

SSE
SSE

 2 / 2 mph 85 / 79°F 10% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 15%
Most Significant Cloud Type: high
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

WSW
WSW

 7 / 9 mph 86 / 81°F 13% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

WSW
WSW

 5 / 6 mph 81 / 77°F 22% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 14%
Most Significant Cloud Type: high
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

ENE
ENE

 4 / 10 mph 61 / 61°F 26% 1013 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
23:00

W
W

 3 / 6 mph 57 / 58°F 30% 1014 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
Mon 20
May		17:00

SW
SW

 4 / 5 mph 79 / 77°F 27% 1010 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

WSW
WSW

 0 / 1 mph 58 / 58°F 43% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

ENE
ENE

 4 / 8 mph 60 / 60°F 33% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May		02:00

WSW
WSW

 3 / 6 mph 57 / 58°F 38% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

WSW
WSW

 3 / 6 mph 57 / 58°F 36% 1011 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 100%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

NNE
NNE

 0 / 1 mph 59 / 58°F 35% 1012 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

WSW
WSW

 3 / 3 mph 76 / 75°F 30% 1012 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

WSW
WSW

 4 / 4 mph 79 / 76°F 27% 1011 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

W
W

 6 / 6 mph 76 / 76°F 40% 1011 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 100%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

WNW
WNW

 2 / 3 mph 62 / 62°F 59% 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
23:00

NNW
NNW

 1 / 3 mph 58 / 58°F 57% 1014 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May		02:00

WNW
WNW

 3 / 6 mph 52 / 52°F 70% 1015 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 13%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

W
W

 2 / 4 mph 49 / 49°F 77% 1015 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

ESE
ESE

 1 / 2 mph 51 / 50°F 70% 1017 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

WSW
WSW

 4 / 4 mph 72 / 76°F 47% 1018 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

WSW
WSW

 7 / 9 mph 78 / 77°F 35% 1016 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

WSW
WSW

 6 / 7 mph 74 / 76°F 48% 1016 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
20:00

W
W

 2 / 4 mph 56 / 58°F 72% 1017 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

SSW
SSW

 2 / 4 mph 51 / 51°F 79% 1018 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May		02:00

ENE
ENE

 2 / 3 mph 48 / 48°F 84% 1018 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

NW
NW

 0 / 1 mph 47 / 47°F 82% 1018 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

SSE
SSE

 2 / 4 mph 49 / 49°F 77% 1021 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

S
S

 3 / 4 mph 72 / 76°F 47% 1020 mb
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: medium
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

SW
SW

 7 / 8 mph 77 / 76°F 37% 1018 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

SW
SW

 7 / 8 mph 74 / 76°F 47% 1018 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

SW
SW

 1 / 2 mph 53 / 53°F 72% 1019 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 2%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

E
E

 4 / 8 mph 52 / 51°F 67% 1018 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
Fri 24
May		02:00

E
E

 4 / 9 mph 52 / 51°F 60% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 35%
Most Significant Cloud Type: high
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

ESE
ESE

 2 / 5 mph 51 / 52°F 53% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

SSE
SSE

 0 / 1 mph 53 / 53°F 40% 1015 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 37%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

SW
SW

 4 / 4 mph 78 / 75°F 24% 1016 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 100%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

WSW
WSW

 6 / 7 mph 81 / 77°F 24% 1014 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 67%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

WSW
WSW

 5 / 6 mph 77 / 76°F 36% 1014 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 31%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

NW
NW

 2 / 3 mph 54 / 54°F 62% 1016 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 15%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

W
W

 1 / 3 mph 52 / 52°F 66% 1016 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 7%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 25
May		02:00

NNW
NNW

 1 / 2 mph 50 / 50°F 74% 1016 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 14%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

NW
NW

 2 / 5 mph 49 / 49°F 71% 1015 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 18%
Most Significant Cloud Type: high
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

NW
NW

 2 / 4 mph 49 / 49°F 74% 1017 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 30%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

WSW
WSW

 3 / 4 mph 73 / 76°F 47% 1017 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 15%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

WSW
WSW

 8 / 9 mph 77 / 77°F 37% 1015 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 9%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

WSW
WSW

 5 / 6 mph 73 / 76°F 46% 1015 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 2%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

SW
SW

 1 / 2 mph 54 / 54°F 68% 1017 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
23:00

E
E

 2 / 4 mph 51 / 52°F 70% 1017 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
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 26
May		02:00

SE
SE

 2 / 4 mph 54 / 56°F 52% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
08:00

E
E

 3 / 7 mph 51 / 51°F 56% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
14:00

WSW
WSW

 7 / 8 mph 80 / 78°F 28% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
20:00

NNW
NNW

 2 / 3 mph 56 / 56°F 46% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: high
9%
0.0 In
Mon 27
May		02:00

SE
SE

 1 / 1 mph 47 / 47°F 54% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
08:00

ENE
ENE

 4 / 8 mph 54 / 54°F 35% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
14:00

WSW
WSW

 7 / 9 mph 82 / 79°F 20% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
1%
0.0 In
20:00

ENE
ENE

 2 / 4 mph 59 / 59°F 26% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Tue 28
May		02:00

ESE
ESE

 2 / 4 mph 53 / 54°F 53% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 99%
Most Significant Cloud Type: high
99%
0.0 In
08:00

NNE
NNE

 1 / 2 mph 55 / 55°F 18% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
14:00

SW
SW

 6 / 6 mph 82 / 79°F 21% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
20:00

ESE
ESE

 2 / 5 mph 56 / 57°F 54% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
31%
0.0 In
Wed 29
May		02:00

SE
SE

 2 / 5 mph 52 / 53°F 45% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
08:00

WNW
WNW

 1 / 2 mph 53 / 53°F 41% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
14:00

WSW
WSW

 7 / 8 mph 85 / 81°F 16% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 79%
Most Significant Cloud Type: high
78%
0.0 In
20:00

SW
SW

 1 / 2 mph 54 / 54°F 58% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Thu 30
May		02:00

E
E

 3 / 7 mph 56 / 56°F 32% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: high
18%
0.0 In
08:00

SW
SW

 1 / 2 mph 51 / 51°F 49% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
14:00

WSW
WSW

 7 / 8 mph 90 / 86°F 10% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 20%
Most Significant Cloud Type: high
20%
0.0 In
20:00

WSW
WSW

 2 / 5 mph 54 / 55°F 59% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Fri 31
May		02:00

ENE
ENE

 2 / 4 mph 59 / 59°F 24% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 77%
Most Significant Cloud Type: high
76%
0.0 In
08:00

WSW
WSW

 3 / 5 mph 55 / 56°F 30% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: high
4%
0.0 In
14:00

WSW
WSW

 5 / 6 mph 87 / 83°F 14% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 15%
Most Significant Cloud Type: high
14%
0.0 In
20:00

WSW
WSW

 2 / 4 mph 58 / 59°F 40% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sat 01
Jun		02:00

S
S

 0 / 1 mph 58 / 58°F 29% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
08:00

WNW
WNW

 1 / 2 mph 56 / 56°F 34% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 47%
Most Significant Cloud Type: high
47%
0.0 In
14:00

WSW
WSW

 7 / 9 mph 87 / 83°F 16% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 7%
Most Significant Cloud Type: high
7%
0.0 In
20:00

E
E

 3 / 6 mph 54 / 55°F 59% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: high
17%
0.0 In
Sun 02
Jun		02:00

ESE
ESE

 1 / 2 mph 55 / 55°F 34% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
08:00

ESE
ESE

 2 / 5 mph 53 / 53°F 36% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
14:00

WSW
WSW

 6 / 6 mph 86 / 82°F 18% 1010 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
20:00

ENE
ENE

 2 / 5 mph 60 / 60°F 35% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 92%
Most Significant Cloud Type: high
91%
0.0 In
Mon 03
Jun		02:00

SSE
SSE

 1 / 3 mph 53 / 53°F 56% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
08:00

ESE
ESE

 3 / 6 mph 56 / 56°F 23% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
0%
0.0 In
14:00

WSW
WSW

 6 / 7 mph 82 / 80°F 29% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
20:00

WNW
WNW

 0 / 0 mph 61 / 61°F 31% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 29%
Most Significant Cloud Type: high
28%
0.0 In

Other Locations Near to Copiapo

Cities and Towns: Caldera, Chile

The day label given represents the local day relative to the local time for the location you are looking at.
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Day

This time is corrected for local time zones and where possible for daylight saving times.
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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.
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Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
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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.
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Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
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Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
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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.
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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.
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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.
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Pressure