TODAY JUN21
TEMPERATURE75
HUMIDITY82
PRESSURE29.76
WIND COND.240 6.9
  • 7762Fri50%50%
  • 8266Sat40%
  • 8667Sun40%
  • 8769Mon
  • 9072Tue20%20%
daynightWeather update from St. Louis, Spirit Of St. Louis Airport at

Eureka 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
January0°F73°F34°F3.2"
February5°F75°F35°F2.3"
March14°F83°F48°F3.7"
April23°F92°F57°F3.4"
May38°F93°F67°F4.7"
June53°F98°F77°F3.9"
July59°F103°F79°F4.1"
August54°F106°F79°F2.4"
September45°F95°F71°F4.3"
October28°F94°F58°F4.1"
November18°F82°F48°F2.8"
December3°F69°F35°F3.5"

Did you know?

  • The highest monthly average temperature in Eureka for August is 79 degrees.
  • The lowest monthly average temperature in Eureka for January is 34 degrees.
  • The most monthly precipitation in Eureka occurs in May with 4.7 inches.
  • The air quality index in Eureka is 20% worse than the national average.
  • The pollution index in Eureka is 39% better than the national average.

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Compare Eureka, MO Weather To Other Cities

Eureka 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.
IndexEurekaMissouriNational
Air quality index609750
Pollution index3,042,5302,360,5665,066,862

Eureka 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

Eureka air quality information

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

Average monthly Eureka temperature with heat index

Eureka monthly precipitation with daily maximum

Eureka monthly snow depth with daily maximum

Eureka monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Byrnes Mill, MO2,8476020%
Clarkson Valley, MO2,6386020%
Crystal Lake Park, MO5186020%
Fenton, MO4,0366020%
Gray Summit, MO2,9776020%
Eureka, MO10,4976020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Big Rapids, MI10,4953530%
Satellite Beach, FL10,4953530%
Cambridge, OH10,495476%
Kennett, MO10,5003628%
Belmont, NC10,4944216%
Eureka, MO10,4976020%
Source: The Eureka, 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.