Key West, FL Weather - Forecast & Monthly Averages

TEMPERATURE	78
HUMIDITY	90
PRESSURE	101730
WIND COND.	60 16.6

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Weather Quick Facts

The highest monthly average temperature in Key West for August is 85.4 degrees
The lowest monthly average temperature in Key West for January is 70 degrees
The most monthly precipitation in Key West occurs in September with 7.1 inches
The air quality index in Key West is 19% better than the national average
The pollution index in Key West is 1488% worse than the national average

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Key West Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	64°F	77°F	70°F	1.6"
February	65°F	77°F	71°F	2.1"
March	68°F	79°F	73°F	1.5"
April	72°F	83°F	77°F	2.0"
May	76°F	86°F	80°F	2.9"
June	78°F	88°F	83°F	4.1"
July	80°F	90°F	85°F	4.5"
August	80°F	90°F	85°F	5.5"
September	79°F	89°F	84°F	7.1"
October	76°F	86°F	81°F	6.1"
November	70°F	81°F	75°F	2.1"
December	68°F	79°F	73°F	2.3"

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Key West air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
Index	Key West	Florida	National
Air quality index	34	35	42
Pollution index	43,296,200	7,570,785	2,726,193

Key West air quality

Measurement	Total
Days measured	362
Days with good air quality	331
Days with moderate air quality	31
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.060%
Benzene	0.510%
Carbon Tetrachloride	0.150%
Lead	0.330%
Mercury	0.090%

Average monthly Key West temperature with heat index

Key West monthly precipitation with daily maximum

Key West monthly snow depth with daily maximum

Key West monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Big Coppitt Key, FL	2,644	34	32.0%
Stock Island, FL	4,692	34	32.0%
Key West, FL	24,495	34	32.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Collinsville, IL	24,489	54	8.0%
Watauga, TX	24,487	51	2.0%
Ottumwa, IA	24,505	29	42.0%
Brookings, SD	24,479	42	16.0%
Homer Glen, IL	24,521	55	10.0%
Key West, FL	24,495	34	32.0%

Source: The Key West, FL weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.