10-Day Weather Forecast - O'Fallon, MO
- 21|13°FSunnyHourly details
Today
21°FSunny cooler with highs in the lower 20s. Northwest winds 15 to 20 mph. Gusts up to 40 mph this morning. Wind chill values as low as 4 below.
Tonight
13°FMostly clear. Lows around 13. Southwest winds around 5 mph.
- 38|33°FMostly SunnyHourly details
Day
38°FMostly sunny. Not as cool with highs in the upper 30s. South winds 5 to 10 mph. Wind chill values as low as 5 above in the morning.
Night
33°FPartly cloudy in the evening then becoming mostly cloudy. Not as cool. Near steady temperature in the lower 30s. Temperature rising into the mid 30s after midnight. South winds 10 to 15 mph with gusts up to 25 mph.
- 42|25°FSunnyHourly details
Day
42°FSunny. Highs in the mid 40s. West winds 10 to 15 mph with gusts up to 25 mph.
Night
25°FMostly clear. Lows in the lower 20s. Highs in the mid 30s.
- 36|21°FMostly SunnyHourly details
Day
36°FMostly clear. Lows in the lower 20s. Highs in the mid 30s.
Night
21°FMostly cloudy. Lows around 20. Highs in the upper 20s.
- 19|3°FMostly CloudyHourly details
Day
19°FMostly cloudy. Lows around 20. Highs in the upper 20s.
Night
3°FMostly cloudy with a 20 percent chance of snow. Lows around zero. Highs around 15. Wind chill values as low as 15 below.
Weekend Weather
- 13|4°FMostly CloudyHourly details
Day
13°FMostly cloudy with a 20 percent chance of snow. Lows around zero. Highs around 15. Wind chill values as low as 15 below.
Night
4°FMostly cloudy. A chance of snow mainly in the evening. Lows 5 to 10 above. Chance of snow 30 percent. Wind chill values as low as 5 below.
- 20|12°FMostly Sunny
Day
20°FMostly sunny. Not as cool with highs in the mid 20s.
Night
12°FClear. Low temperature around 12F. Dew point will be around 4F with an average humidity of 62%. Winds will be 3 mph from the SW.
- 28|18°FSunny
Day
28°FSunny. High temperature around 28F. Dew point will be around 9F with an average humidity of 59%. Winds will be 3 mph from the SW.
Night
18°FClear. Low temperature around 18F. Dew point will be around 12F with an average humidity of 69%. Winds will be 2 mph from the SW.
- 28|18°FMostly Cloudy
Day
28°FMostly cloudy. High temperature around 28F. Dew point will be around 16F with an average humidity of 68%. Winds will be 1 mph from the SW.
Night
18°FCloudy. Low temperature around 18F. Dew point will be around 14F with an average humidity of 69%. Winds will be 3 mph from the NW.
- 28|16°FPartly Cloudy
Day
28°FPartly cloudy. High temperature around 28F. Dew point will be around 14F with an average humidity of 64%. Winds will be 5 mph from the NW.
Night
16°FClear. Low temperature around 16F. Dew point will be around 11F with an average humidity of 69%. Winds will be 3 mph from the W.
