Weather Alert
O'Fallon Weather Warning NWS WEATHER ALERT FOR THE O FALLON, IL AREA - HARD FREEZE WARNING Issued: 1231 AM CST Fri Nov 6 2026 O'Fallon Weather Warning

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O'Fallon, IL Weather - Hour by Hour Forecast

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O'Fallon, IL Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Overcast. Temperature is 55°F13°C, dew point 47°F8°C, humidity 74%. Wind direction is W at 9 mph14 km/h with visibility of 10 mi16 km. Barometric pressure is 30 in1015 mb.
Rest of Tonight - Mostly cloudy with a slight chance of very light drizzle. Near steady temperature around 50. Northwest winds 5 to 10 mph with gust.. Full Forecast
Friday - Mostly cloudy with a slight chance of very light drizzle in the morning, then mostly sunny in the afternoon. Cooler with highs in .. Full Forecast

O'Fallon Hourly Weather

24 Hour Forecast Scroll
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Midnight
O'Fallon, IL Hourly Weather - Cloudy - 1:00 AM O'Fallon, IL Hourly Weather - Cloudy - 2:00 AM O'Fallon, IL Hourly Weather - Cloudy - 3:00 AM O'Fallon, IL Hourly Weather - Cloudy - 4:00 AM O'Fallon, IL Hourly Weather - Cloudy - 5:00 AM O'Fallon, IL Hourly Weather - Cloudy - 6:00 AM O'Fallon, IL Hourly Weather - Cloudy - 7:00 AM O'Fallon, IL Hourly Weather - Cloudy - 8:00 AM O'Fallon, IL Hourly Weather - Cloudy - 9:00 AM O'Fallon, IL Hourly Weather - Cloudy - 10:00 AM O'Fallon, IL Hourly Weather - Mostly Cloudy - 11:00 AM O'Fallon, IL Hourly Weather - Mostly Cloudy - 12:00 PM O'Fallon, IL Hourly Weather - Mostly Cloudy - 1:00 PM O'Fallon, IL Hourly Weather - Clear - 2:00 PM O'Fallon, IL Hourly Weather - Clear - 3:00 PM O'Fallon, IL Hourly Weather - Clear - 4:00 PM O'Fallon, IL Hourly Weather - Clear - 5:00 PM O'Fallon, IL Hourly Weather - Clear - 6:00 PM O'Fallon, IL Hourly Weather - Clear - 7:00 PM O'Fallon, IL Hourly Weather - Clear - 8:00 PM O'Fallon, IL Hourly Weather - Clear - 9:00 PM O'Fallon, IL Hourly Weather - Clear - 10:00 PM O'Fallon, IL Hourly Weather - Clear - 11:00 PM O'Fallon, IL Hourly Weather - Clear - 12:00 AM
Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear
53°F12°C 52°F11°C 52°F11°C 51°F11°C 51°F11°C 50°F10°C 51°F11°C 51°F11°C 52°F11°C 53°F12°C 55°F13°C 56°F13°C 56°F13°C 57°F14°C 57°F14°C 54°F12°C 52°F11°C 49°F9°C 47°F8°C 44°F7°C 42°F6°C 41°F5°C 39°F4°C 38°F3°C
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5% 5% 5% 5% 5% 5% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 2% 2% 2% 2% 2% 2%
46°F8°C 45°F7°C 45°F7°C 45°F7°C 45°F7°C 45°F7°C 44°F7°C 44°F7°C 43°F6°C 42°F6°C 40°F4°C 39°F4°C 38°F3°C 36°F2°C 35°F2°C 34°F1°C 33°F1°C 32°F0°C 31°F-1°C 31°F-1°C 30°F-1°C 30°F-1°C 29°F-2°C 29°F-2°C
77% 77% 77% 80% 80% 83% 77% 77% 71% 66% 57% 53% 51% 45% 43% 47% 48% 52% 54% 60% 62% 65% 67% 70%
NW NW NW NNW NNW NNW NNW N N N NNW NNW NNW NNW NNW NNW N N N N N N N N
9 mph 11 mph 11 mph 11 mph 10 mph 10 mph 10 mph 12 mph 12 mph 12 mph 10 mph 10 mph 10 mph 10 mph 10 mph 10 mph 7 mph 7 mph 7 mph 6 mph 6 mph 6 mph 5 mph 5 mph
10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km
Hour (CST)
Weather
Clouds
Temperature
Precip. Type
POP
Dewpoint
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POP = Probability of Precipitation. ** Indicates missing data/values from KCPS model statistics.

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Prob Precip % = Probability of Precipitation.

O'Fallon 36 Hour Forecast

POP = Probability of Precipitation. ** Indicates missing data/values from model statistics.

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