Alton, IA Weather - Forecast & Monthly Averages

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Weather Quick Facts

The highest monthly average temperature in Alton for July is 74.9 degrees
The lowest monthly average temperature in Alton for January is 20.9 degrees
The most monthly precipitation in Alton occurs in June with 7.1 inches
The air quality index in Alton is 17% better than the national average
The pollution index in Alton is 67% better than the national average

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Alton 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	30°F	21°F	0.8"
February	14°F	34°F	23°F	1.0"
March	28°F	49°F	37°F	2.2"
April	39°F	63°F	49°F	4.1"
May	49°F	73°F	60°F	5.2"
June	60°F	83°F	71°F	7.1"
July	64°F	86°F	75°F	4.2"
August	62°F	83°F	71°F	5.5"
September	53°F	77°F	63°F	2.8"
October	41°F	64°F	51°F	4.0"
November	28°F	49°F	38°F	3.7"
December	16°F	33°F	24°F	2.5"

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Alton 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	Alton	Iowa	National
Air quality index	35	39	42
Pollution index	890,079	1,154,535	2,726,193

Alton air quality information

Measurement	Total
Days measured	364
Days with good air quality	322
Days with moderate air quality	42
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Alton air quality information

Pollutant	Total
Arsenic	0.000%
Benzene	0.010%
Carbon Tetrachloride	0.002%
Lead	0.004%
Mercury	0.000%

Average monthly Alton temperature with heat index

Alton monthly precipitation with daily maximum

Alton monthly snow depth with daily maximum

Alton monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Maurice, IA	295	35	30.0%
Struble, IA	95	35	30.0%
Brunsville, IA	140	35	30.0%
Orange City, IA	6,158	35	30.0%
Archer, IA	116	35	30.0%
Alton, IA	1,534	35	30.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
London, CA	1,534	66	32.0%
Wolcott, NY	1,534	37	26.0%
Falling Water, TN	1,534	46	8.0%
Hughes Springs, TX	1,534	37	26.0%
Upper Island Cove, NL	1,534	n/a
Alton, IA	1,534	35	30.0%

Source: The Alton, 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.