TODAY AUG21
TEMPERATURE63
HUMIDITY100
PRESSURE
WIND COND.320 6.9
  • 7753Wed
  • 7963Thu
  • 7963Fri50%40%
  • 8766Sat
  • 8667Sun
daynightWeather update from Mason City, Mason City Municipal Airport at

Thornton Average Weather

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January9°F25°F17°F0.7"
February11°F29°F20°F1.1"
March25°F44°F34°F2.2"
April36°F60°F47°F5.1"
May48°F71°F59°F5.0"
June58°F81°F69°F5.4"
July61°F84°F72°F4.2"
August59°F82°F70°F4.0"
September51°F76°F62°F4.3"
October38°F62°F49°F2.7"
November26°F47°F36°F1.5"
December13°F29°F21°F1.4"

Did you know?

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

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Compare Thornton, IA Weather To Other Cities

Thornton 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.
IndexThorntonIowaNational
Air quality index183950
Pollution index1,013,9601,643,8365,066,862

Thornton air quality information

MeasurementTotal
Days measured334
Days with good air quality332
Days with moderate air quality2
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Thornton air quality information

PollutantTotal
Arsenic0.000%
Benzene0.010%
Carbon Tetrachloride0.001%
Lead0.001%
Mercury0.000%

Average monthly Thornton temperature with heat index

Thornton monthly precipitation with daily maximum

Thornton monthly snow depth with daily maximum

Thornton monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Chapin, IA2591864%
Goodell, IA1281864%
Latimer, IA4991864%
Rockwell, IA1,1001864%
Ventura, IA7371864%
Thornton, IA4821864%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Pink Hill, NC4823334%
Portland, PA4823922%
Caroga Lake, NY4823432%
Newcastle, TX4822648%
Center Ridge, AR482476%
Thornton, IA4821864%
Source: The Thornton, 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.