Average change in
Temperature
Average change in high temperature day-to-day
Last Month:
7.7°
Last Year:
7.7°
Average change in low temperature day-to-day
Last Month:
9.3°
Last Year:
9.2°
Average change in
Precipitation
Chance of dry day after a precip day
Last Month:
83%
Last Year:
57%
Chance of precip day after a dry day
Last Month:
22%
Last Year:
22%
ForecastAdvisor Fact
3.3% of OpenWeather's high temperature forecasts for O Fallon were exactly right last month.