O'fallon, MO

Missouri · Honest neighborhood reviews

Photo: Pexels

Median Income

$101K

Median Home Price

$305K

Avg Walk Score

30/100

Neighborhoods

Avg across all zip codes · Census ACS

Climate

Weather in O'fallon

🍂

Humid Continental

Cold, snowy winters and warm summers. Four distinct seasons with year-round precipitation.

Avg High

67°F

Avg Low

49°F

Annual Rain

43.6"

Hottest / Coldest

Jul / Jan

Monthly temperatures & rain

39°

24°

49°

30°

59°

39°

68°

48°

77°

57°

86°

67°

88°

71°

86°

69°

81°

62°

71°

52°

56°

40°

47°

31°

Temp range (high / low)

Precipitation (relative)

Wettest: Jul

Based on 2021–2023 climate data · Open-Meteo ERA5 archive · Temperatures in °F