10-Day Weather Forecast - O'Fallon, IL
As of
- |81°F
Warm and HumidHourly detailsTonight
81°FClear. Low temperature around 81F. Dew point will be around 74F with an average humidity of 76%. Winds will be 5 mph from the S.
- 99|82°F
Hot and HumidHourly detailsDay
99°FSunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 108.
Night
82°F
Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. South winds around 5 mph in the evening, becoming light and variable. Heat index values up to 105 early in the evening.
Weekend Weather
- 99|76°FHot and HumidHourly details
Day
99°FMostly sunny. Hot with highs in the upper 90s. West winds around 5 mph. Heat index values up to 108.
Night
76°FPartly cloudy in the evening, then becoming mostly clear. Humid with lows in the lower 70s. Northeast winds around 5 mph. Heat index values up to 104 early in the evening.
- 93|69°F
Partly CloudyHourly detailsDay
93°FMostly clear. Hot. Highs in the mid 90s. Heat index values up to 100.
Night
69°FMostly clear. Hot. Lows in the upper 60s. Heat index values up to 100.
- 90|65°F
SunnyHourly detailsDay
90°FMostly clear. Hot. Highs in the mid 90s. Heat index values up to 100.
Night
65°FMostly clear. Hot. Lows in the upper 60s. Heat index values up to 100.
- 96|74°F
Mostly SunnyHourly detailsDay
96°FMostly clear. Hot. Highs in the mid 90s. Heat index values up to 100.
Night
74°FMostly clear. Hot. Lows in the mid 70s. Heat index values up to 105.
- 98|78°FHot and HumidHourly details
Day
98°FMostly clear. Hot. Highs in the upper 90s. Heat index values up to 105.
Night
78°FPartly cloudy in the evening, then mostly clear with a slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 100 early in the evening.
- 95|75°FMostly Sunny
Day
95°FMostly sunny with a slight chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 20 percent.
Night
75°F
Clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 75F. Dew point will be around 72F with an average humidity of 79%. Winds will be 4 mph from the S.
- 91|70°FMostly Sunny
Day
91°FMostly sunny. High temperature around 91F. Dew point will be around 71F with an average humidity of 63%. Winds will be 4 mph from the SW.
Night
70°F
Clear. Low temperature around 70F. Dew point will be around 71F with an average humidity of 85%. Winds will be 3 mph from the SE.
Weekend Weather
- 90|70°FSunny
Day
90°FSunny. High temperature around 90F. Dew point will be around 71F with an average humidity of 68%. Winds will be 5 mph from the S.
Night
70°FClear. Low temperature around 70F. Dew point will be around 69F with an average humidity of 82%. Winds will be 4 mph from the SE.
