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O'Fallon, Illinois, United States

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Weather Radar in O'Fallon, Illinois, United States

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FAQ

What are the average monthly temperatures in O'Fallon?

Average temperatures for O'Fallon:

Month	Min Temp	Max Temp
January	-3.8°C (25.2°F)	4.7°C (40.5°F)
February	-1.6°C (29.1°F)	7.8°C (46.0°F)
March	4.1°C (39.3°F)	14.3°C (57.7°F)
April	9.8°C (49.6°F)	20.7°C (69.3°F)
May	15.9°C (60.7°F)	26.2°C (79.2°F)
June	20.8°C (69.4°F)	30.4°C (86.8°F)
July	21.9°C (71.4°F)	31.4°C (88.5°F)
August	20.3°C (68.5°F)	30.4°C (86.7°F)
September	16.5°C (61.6°F)	27.6°C (81.6°F)
October	9.8°C (49.6°F)	20.2°C (68.3°F)
November	3.8°C (38.8°F)	13.3°C (56.0°F)
December	-1.0°C (30.2°F)	6.4°C (43.6°F)

How much rain does O'Fallon get?

The average annual rainfall for O'Fallon is 1035mm (41").

How much snow does O'Fallon get?

The average annual snowfall for O'Fallon is 50mm (2").