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Current Weather Conditions for O Fallon, IL

A slight chance of rain showers between 3am and 4am, then a slight chance of showers and thunderstorms. Mostly cloudy. Low around 66, with temperatures rising to around 70 overnight. South wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
69°F

Conditions

Wind: 12 mph S
Humidity: 90%
Probability of Precipitation: 2%

Hourly Forcast (next 12 hours)

4 AM 5 AM 6 AM 7 AM 8 AM 9 AM 10 AM 11 AM 12 PM 1 PM 2 PM 3 PM 4 PM
69° 70° 70° 70° 70° 70° 70° 70° 70° 72° 74° 76° 78°

Upcoming Week

Day Forecast High Low
Tonight
Mostly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of rain showers between 3am and 4am, then a slight chance of showers and thunderstorms. Mostly cloudy. Low around 66, with temperatures rising to around 70 overnight. South wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
81°F 66°F
Tuesday
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
A chance of showers and thunderstorms before 10am, then showers and thunderstorms likely. Mostly cloudy. High near 82, with temperatures falling to around 76 in the afternoon. Southwest wind 10 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
81°F 66°F
Tuesday Night
Showers And Thunderstorms Likely then Showers And Thunderstorms
Showers and thunderstorms likely before 7pm, then showers and thunderstorms. Cloudy, with a low around 58. Northwest wind 7 to 10 mph. Chance of precipitation is 80%.
81°F 66°F
Wednesday
Rain Showers
Rain showers. Mostly cloudy, with a high near 70. North wind around 10 mph. Chance of precipitation is 80%.
81°F 66°F
Wednesday Night
Slight Chance Rain Showers then Mostly Cloudy
A slight chance of rain showers before 7pm. Mostly cloudy, with a low around 52. Northeast wind around 8 mph. Chance of precipitation is 20%.
81°F 66°F
Thursday
Partly Sunny
Partly sunny, with a high near 73.
81°F 66°F
Thursday Night
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 50%.
81°F 66°F
Friday
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy, with a high near 75. Chance of precipitation is 70%.
81°F 66°F
Friday Night
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.
81°F 66°F
Saturday
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 30%.
81°F 66°F
Saturday Night
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 30%.
81°F 66°F
Sunday
Chance Rain Showers
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 30%.
81°F 66°F
Sunday Night
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
81°F 66°F
Memorial Day
Chance Rain Showers
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 40%.
81°F 66°F
Data provided by weather.gov