TODAY AUG19
TEMPERATURE85
HUMIDITY53
PRESSURE29.97
WIND COND.130 6.9
  • 8668Sun60%
  • 7762Mon80%70%
  • 7857Tue
  • 8058Wed
  • 8264Thu
daynightWeather update from Des Moines, Des Moines International Airport at

Norwalk 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
January14°F35°F23°F0.9"
February17°F39°F26°F1.2"
March30°F54°F41°F2.2"
April41°F67°F53°F4.9"
May51°F76°F63°F4.9"
June62°F86°F74°F6.5"
July66°F89°F77°F4.2"
August64°F87°F75°F5.1"
September56°F81°F68°F3.7"
October43°F68°F55°F3.2"
November31°F54°F42°F1.8"
December18°F38°F27°F2.1"

Did you know?

  • The highest monthly average temperature in Norwalk for July is 77 degrees.
  • The lowest monthly average temperature in Norwalk for January is 23 degrees.
  • The most monthly precipitation in Norwalk occurs in June with 6.5 inches.
  • The air quality index in Norwalk is 17% better than the national average.
  • The pollution index in Norwalk is 83% worse than the national average.

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Compare Norwalk, IA Weather To Other Cities

Norwalk 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.
IndexNorwalkIowaNational
Air quality index413950
Pollution index9,310,1601,643,8365,066,862

Norwalk air quality information

MeasurementTotal
Days measured365
Days with good air quality267
Days with moderate air quality98
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Norwalk air quality information

PollutantTotal
Arsenic0.010%
Benzene0.110%
Carbon Tetrachloride0.080%
Lead0.030%
Mercury0.010%

Average monthly Norwalk temperature with heat index

Norwalk monthly precipitation with daily maximum

Norwalk monthly snow depth with daily maximum

Norwalk monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Altoona, IA16,6924118%
Clive, IA17,0224118%
Grimes, IA10,4224118%
Milo, IA9284118%
St. Marys, IA2104118%
Norwalk, IA9,9444118%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Fairfield, IA9,9424020%
Jefferson, GA9,9463922%
Brownsville, TN9,938335570%
Elkhorn, WI9,9313628%
Essex Junction, VT9,9223628%
Norwalk, IA9,9444118%
Source: The Norwalk, 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.