10-Day Weather Forecast - O'Fallon, MO
- |77°F
40% Chance of StormsHourly detailsTonight
77°FPartly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 70s. South winds 10 to 15 mph. Chance of rain 40 percent. Heat index values up to 103 early this evening.
- 94|64°F
30% Chance of RainHourly detailsDay
94°FSunny hot with highs in the mid 90s. South winds 15 to 20 mph with gusts up to 30 mph. Heat index values up to 106.
Night
64°FMostly cloudy. Showers with a chance of thunderstorms in the evening. Cooler with lows in the mid 60s. Southwest winds 15 to 20 mph with gusts up to 30 mph becoming northwest 5 to 10 mph after midnight. Chance of rain 90 percent. Heat index values up to 103 early in the evening.
- 84|68°F
SunnyHourly detailsDay
84°FSunny cooler with highs in the mid 80s. Northwest winds around 5 mph.
Night
68°F
Mostly clear. Lows in the mid 60s. North winds around 5 mph becoming south after midnight.
Weekend Weather
- 84|70°F
50% Chance of StormsHourly detailsDay
84°FMostly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 50 percent.
Night
70°FA chance of thunderstorms. Showers. Lows in the upper 60s. Chance of rain 80 percent.
- 80|64°F40% Chance of StormsHourly details
Day
80°FMostly cloudy with a chance of showers and thunderstorms in the morning then partly sunny with a slight chance of showers and thunderstorms in the afternoon. Highs around 80. Chance of rain 40 percent.
Night
64°F
Mostly cloudy with a 30 percent chance of showers. Lows in the lower 60s.
- 79|64°F30% Chance of StormsHourly details
Day
79°FPartly sunny with a slight chance of thunderstorms. A chance of showers mainly in the morning. Highs in the mid 70s. Chance of rain 30 percent.
Night
64°F
Partly cloudy. A slight chance of showers in the evening. Lows in the upper 50s. Chance of rain 20 percent.
- 81|64°F
Mostly SunnyHourly detailsDay
81°FMostly sunny. Highs around 80.
Night
64°FMostly clear. A slight chance of showers and thunderstorms after midnight. Lows in the lower 60s. Chance of rain 20 percent.
- 83|70°FMostly Sunny
Day
83°FMostly sunny. Highs in the mid 80s.
Night
70°F
Mostly clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 70F. Dew point will be around 63F with an average humidity of 72%. Winds will be 5 mph from the S.
- 87|73°F30% Chance of Rain
Day
87°FSunny with a 25% chance for rain and thunderstorms. High temperature around 87F. Dew point will be around 68F with an average humidity of 65%. Winds will be 6 mph from the SW.
Night
73°FClear with a 30% chance for rain and thunderstorms. Low temperature around 73F. Dew point will be around 71F with an average humidity of 78%. Winds will be 3 mph from the SW.
- 88|74°F30% Chance of Rain
Day
88°FSunny with a 30% chance for rain and thunderstorms. High temperature around 88F. Dew point will be around 71F with an average humidity of 68%. Winds will be 3 mph from the SW.
Night
74°FClear with a 40% chance for rain and thunderstorms. Low temperature around 74F. Dew point will be around 72F with an average humidity of 78%. Winds will be 2 mph from the S.
