St. Charles, IA Weather - Forecast & Monthly Averages

TEMPERATURE	34
HUMIDITY	83
PRESSURE	102100
WIND COND.	310 20.5

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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.
Cumming, IA	536	39	22.0%
Lorimor, IA	396	39	22.0%
Martensdale, IA	504	39	22.0%
Bevington, IA	27	39	22.0%
Norwalk, IA	11,467	39	22.0%
St. Charles, IA	787	39	22.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Allentown, FL	787	41	18.0%
Napoleon, ND	787	36	28.0%
Wadsworth, NV	787	39	22.0%
McClure, OH	787	40	20.0%
Twinsburg Heights, OH	787	43	14.0%
St. Charles, IA	787	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.