TODAY AUG21
TEMPERATURE80
HUMIDITY69
PRESSURE29.73
WIND COND.
  • 7762Tue20%
  • 8057Wed
  • 8162Thu
  • 8370Fri60%40%
  • 9172Sat
daynightWeather update from St. Louis, Spirit Of St. Louis Airport at

Defiance 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
January23°F44°F32°F2.1"
February25°F46°F35°F1.8"
March36°F60°F47°F3.7"
April46°F71°F58°F5.3"
May55°F78°F66°F4.5"
June65°F87°F76°F4.8"
July68°F90°F79°F2.9"
August66°F89°F77°F3.4"
September58°F82°F69°F3.9"
October46°F70°F57°F3.0"
November36°F59°F46°F2.8"
December27°F45°F35°F3.1"

Did you know?

  • The highest monthly average temperature in Defiance for July is 79 degrees.
  • The lowest monthly average temperature in Defiance for January is 32 degrees.
  • The most monthly precipitation in Defiance occurs in April with 5.3 inches.
  • The air quality index in Defiance is 20% worse than the national average.
  • The pollution index in Defiance is 39% better than the national average.

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Compare Defiance, MO Weather To Other Cities

Defiance 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.
IndexDefianceMissouriNational
Air quality index609750
Pollution index3,042,5302,360,5665,066,862

Defiance air quality information

MeasurementTotal
Days measured365
Days with good air quality99
Days with moderate air quality231
Days w/ poor A.Q. for sensitive groups33
Days with unhealthy air quality2

Defiance air quality information

PollutantTotal
Arsenic0.010%
Benzene0.040%
Carbon Tetrachloride0.010%
Lead0.010%
Mercury0.001%

Average monthly Defiance temperature with heat index

Defiance monthly precipitation with daily maximum

Defiance monthly snow depth with daily maximum

Defiance monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Chesterfield, MO47,7176020%
Ellisville, MO9,1886020%
Gray Summit, MO2,9776020%
LaBarque Creek, MO1,9276020%
New Melle, MO4966020%
Defiance, MO1446020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Marquette, WI1443922%
Freistatt, MO144325550%
Jacumba, CA144476%
Sharon, GA1443922%
Nelchina, AK1442942%
Defiance, MO1446020%
Source: The Defiance, MO 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.