Mason City, IA Weather Forecast & Monthly Average Temperatures

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Mason City Average Weather

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	9°F	25°F	17°F	0.7"
February	11°F	29°F	20°F	1.1"
March	25°F	44°F	34°F	2.2"
April	36°F	60°F	47°F	5.1"
May	48°F	71°F	59°F	5.0"
June	58°F	81°F	69°F	5.4"
July	61°F	84°F	72°F	4.2"
August	59°F	82°F	70°F	4.0"
September	51°F	76°F	62°F	4.3"
October	38°F	62°F	49°F	2.7"
November	26°F	47°F	36°F	1.5"
December	13°F	29°F	21°F	1.4"

Did you know?

The highest monthly average temperature in Mason City for July is 72 degrees.
The lowest monthly average temperature in Mason City for January is 17 degrees.
The most monthly precipitation in Mason City occurs in June with 5.4 inches.
The air quality index in Mason City is 63% better than the national average.
The pollution index in Mason City is 79% better than the national average.

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Compare Mason City, IA Weather To Other Cities

Mason City 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	Mason City	Iowa	National
Air quality index	18	39	50
Pollution index	1,013,960	1,643,836	5,066,862

Mason City air quality information

Measurement	Total
Days measured	334
Days with good air quality	332
Days with moderate air quality	2
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Mason City air quality information

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

Average monthly Mason City temperature with heat index

Mason City monthly precipitation with daily maximum

Mason City monthly snow depth with daily maximum

Mason City monthly wind speed information

Nearby cities with good air quality

City, State	Population	Air Quality Index	National Avg.
Grafton, IA	355	18	64%
Manly, IA	1,551	18	64%
Rock Falls, IA	150	18	64%
Swaledale, IA	181	18	64%
Burchinal, IA	53	18	64%
Mason City, IA	27,546	18	64%

Cities with similar population

City, State	Population	Air Quality Index	National Avg.
Seguin, TX	27,543	45	10%
Magna, UT	27,553	47	6%
Danvers, MA	27,558	47	6%
Paragould, AR	27,521	36	28%
Allen Park, MI	27,519	52	4%
Mason City, IA	27,546	18	64%

Source: The Mason City, 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.