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Current Weather Conditions for O Fallon, IL

Patchy fog after 5am. Mostly clear, with a low around 58. Northeast wind around 3 mph.
73°F

Conditions

Wind: 3 mph NE
Humidity: 59%
Probability of Precipitation: 0%

Hourly Forcast (next 12 hours)

2 AM 3 AM 4 AM 5 AM 6 AM 7 AM 8 AM 9 AM 10 AM 11 AM 12 PM 1 PM 2 PM
73° 70° 67° 64° 63° 62° 60° 60° 59° 58° 60° 64° 68°

Upcoming Week

Day Forecast High Low
Tonight
Mostly Clear then Patchy Fog
Patchy fog after 5am. Mostly clear, with a low around 58. Northeast wind around 3 mph.
76°F 62°F
Memorial Day
Patchy Fog then Mostly Sunny
Patchy fog before 7am. Mostly sunny, with a high near 82. East wind 2 to 9 mph.
76°F 62°F
Monday Night
Mostly Cloudy
Mostly cloudy, with a low around 60. East wind 3 to 7 mph.
76°F 62°F
Tuesday
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 81. East wind 2 to 7 mph. Chance of precipitation is 30%.
76°F 62°F
Tuesday Night
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
A chance of showers and thunderstorms before 10pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 65. Southeast wind 1 to 6 mph. Chance of precipitation is 60%.
76°F 62°F
Wednesday
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Showers and thunderstorms likely before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 83. Chance of precipitation is 60%.
76°F 62°F
Wednesday Night
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
Showers and thunderstorms likely before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 66. Chance of precipitation is 60%.
76°F 62°F
Thursday
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 30%.
76°F 62°F
Thursday Night
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.
76°F 62°F
Friday
Chance Showers And Thunderstorms
A chance of rain showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Chance of precipitation is 50%.
76°F 62°F
Friday Night
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 50%.
76°F 62°F
Saturday
Chance Showers And Thunderstorms
A chance of rain showers before 7am, then a chance of showers and thunderstorms. Partly sunny, with a high near 77. Chance of precipitation is 40%.
76°F 62°F
Saturday Night
Chance Showers And Thunderstorms then Partly Cloudy
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 62. Chance of precipitation is 40%.
76°F 62°F
Sunday
Mostly Sunny
Mostly sunny, with a high near 78.
76°F 62°F
Data provided by weather.gov