Mason City, IA Weather - Forecast & Monthly Averages

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TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.

Weather Quick Facts

The highest monthly average temperature in Mason City for July is 72.5 degrees
The lowest monthly average temperature in Mason City for January is 16.7 degrees
The most monthly precipitation in Mason City occurs in June with 5.4 inches
The air quality index in Mason City is 64% better than the national average
The pollution index in Mason City is 63% better than the national average

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Mason City 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	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"

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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	15	39	42
Pollution index	1,013,960	1,154,535	2,726,193

Mason City air quality

Measurement	Total
Days measured	118
Days with good air quality	118
Days with moderate air quality	0
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 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	Population	Air Quality Index	National Avg.
Burchinal, IA	20	15	70.0%
Joice, IA	250	15	70.0%
Grafton, IA	180	15	70.0%
Rock Falls, IA	161	15	70.0%
Rockwell, IA	871	15	70.0%
Mason City, IA	27,064	15	70.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Sainte-Thérèse, QC	27,055	n/a
Wheeling, WV	27,046	39	22.0%
Lincoln, ON	27,082	n/a
Clarence-Rockland, ON	27,082	n/a
Wakefield, MA	27,041	43	14.0%
Mason City, IA	27,064	15	70.0%

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.