Jefferson, IA Weather - Forecast & Monthly Averages

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Weather Quick Facts

The highest monthly average temperature in Jefferson for July is 74 degrees
The lowest monthly average temperature in Jefferson for January is 21 degrees
The most monthly precipitation in Jefferson occurs in August with 2.2 inches
The air quality index in Jefferson is 12% better than the national average
The pollution index in Jefferson is 81% better than the national average

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Jefferson 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	12°F	31°F	21°F	0.7"
February	15°F	35°F	24°F	0.6"
March	29°F	50°F	38°F	1.0"
April	40°F	64°F	51°F	1.2"
May	50°F	75°F	62°F	1.5"
June	61°F	84°F	72°F	1.9"
July	63°F	86°F	74°F	1.3"
August	61°F	83°F	71°F	2.2"
September	53°F	79°F	65°F	2.1"
October	41°F	67°F	53°F	1.6"
November	30°F	52°F	39°F	0.8"
December	18°F	37°F	26°F	0.9"

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Jefferson 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	Jefferson	Iowa	National
Air quality index	37	39	42
Pollution index	517,691	1,154,535	2,726,193

Jefferson air quality

Measurement	Total
Days measured	214
Days with good air quality	210
Days with moderate air quality	4
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Air quality details

Pollutant	Total
Arsenic	0.000%
Benzene	0.010%
Carbon Tetrachloride	0.001%
Lead	0.002%
Mercury	0.000%

Average monthly Jefferson temperature with heat index

Jefferson monthly precipitation with daily maximum

Jefferson monthly snow depth with daily maximum

Jefferson monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Bagley, IA	303	37	26.0%
Beaver, IA	67	37	26.0%
Dawson, IA	152	37	26.0%
Ralston, IA	98	37	26.0%
Bayard, IA	332	37	26.0%
Jefferson, IA	4,121	37	26.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Burnham, IL	4,121	55	10.0%
Roebling, NJ	4,120	41	18.0%
Dewey-Humboldt, AZ	4,123	43	14.0%
Northwest Harwich, MA	4,123	36	28.0%
Broad Brook, CT	4,118	41	18.0%
Jefferson, IA	4,121	37	26.0%

Source: The Jefferson, IA 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.