St. Charles, IA Weather - Forecast & Monthly Averages

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TEMPERATURE	49
HUMIDITY	65
PRESSURE	101830
WIND COND.

Weather Quick Facts

The highest monthly average temperature in St. Charles for July is 76.6 degrees
The lowest monthly average temperature in St. Charles for January is 26.1 degrees
The most monthly precipitation in St. Charles occurs in September with 9.2 inches
The air quality index in St. Charles is 7% better than the national average
The pollution index in St. Charles is 86% better than the national average

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St. Charles 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	20°F	34°F	26°F	2.9"
February	27°F	47°F	36°F	2.2"
March	35°F	56°F	44°F	8.3"
April	45°F	65°F	54°F	4.8"
May	51°F	73°F	61°F	6.4"
June	63°F	87°F	75°F	4.8"
July	67°F	88°F	77°F	8.0"
August	62°F	84°F	72°F	5.8"
September	58°F	81°F	69°F	9.2"
October	46°F	69°F	56°F	8.5"
November	35°F	56°F	45°F	4.1"
December	21°F	36°F	28°F	2.6"

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St. Charles 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	St. Charles	Iowa	National
Air quality index	39	39	42
Pollution index	376,148	1,154,535	2,726,193

St. Charles air quality

Measurement	Total
Days measured	365
Days with good air quality	306
Days with moderate air quality	59
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Air quality details

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

Average monthly St. Charles temperature with heat index

St. Charles monthly precipitation with daily maximum

St. Charles monthly snow depth with daily maximum

St. Charles monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Norwalk, IA	11,804	39	22.0%
New Virginia, IA	467	39	22.0%
Patterson, IA	247	39	22.0%
East Peru, IA	147	39	22.0%
Truro, IA	554	39	22.0%
St. Charles, IA	813	39	22.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Meadow Vale, KY	813	49	2.0%
Paraje, NM	813	53	6.0%
Belle Terre, NY	813	43	14.0%
Mount Vernon, OR	813	20	60.0%
Mountainaire, AZ	812	45	10.0%
St. Charles, IA	813	39	22.0%

Source: The St. Charles, 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.