O Fallon, IL Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Partly Cloudy 61°F
Feels Like 61°F  
Humidity 88% Dew Point 58°F Wind NW 1 MPH Gusts 1 Barometer 29.79 in.756.7 mm
Report from a personal weather station 2.7 miles W of central O Fallon
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Point Forecast at a Glance

FriNov 14
Fri Nov 14: Mostly Cloudy, Low 60F
 
60
SatNov 15
Sat Nov 15: Mostly Sunny, High 78F, Low 44F
78
44
SunNov 16
Sun Nov 16: Sunny, High 58F, Low 37F
58
37
MonNov 17
Mon Nov 17: Showers, High 58F, Low 47F
20%
58
47
TueNov 18
Tue Nov 18: Partly Sunny, High 67F, Low 46F
67
46
WedNov 19
Wed Nov 19: Rain, High 61F, Low 50F
30%
61
50
ThuNov 20
Thu Nov 20: Thunderstorms, High 63F, Low 52F
80%
63
52

7-Day Temperature Trend

Week Ahead Summary

High temperatures drop from 78°F to a low of 58°F, then recover to 63°F by week's end. Unsettled weather expected with rain likely on at least 4 days.

Climate Context

This week's forecast shows temperatures running 8°F above the historical average for November. Normal highs for this period are around 56°F with lows around 37°F.

This Date in Weather History

1987 - Thunderstorms spawned twenty-two tornadoes in eastern Texas, Louisiana and Oklahoma. A tornado moving out of northeastern Texas killed one person and injured ninety-six others around Shreveport LA causing more than five million dollars damage. Tornadoes in Texas claimed ten lives, and injured 191 persons. A tornado caused more than nineteen million dollars damage around Palestine TX. Severe thunderstorms spawned eighteen tornadoes in Mississippi and seven in Georgia the next day, and thunderstorms in southeastern Texas produced wind gusts to 102 mph at Galveston, and wind gusts to 110 mph at Bay City, killing one person. There were a total of forty-nine tornadoes in the south central U.S. in two days. The tornadoes claimed eleven lives, injured 303 persons, and caused more than seventy million dollars damage.

More on this and other weather history

O Fallon, IL 7 Day Weather Forecast Details

Friday Nov 14

Mostly Cloudy

Night: Mostly cloudy, with a low around 60. Southwest wind around 10 mph.

Saturday Nov 15

Mostly Sunny

Day: Mostly sunny, with a high near 78. Southwest wind 10 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.

Mostly Clear

Night: Mostly clear, with a low around 44. North wind 7 to 10 mph, with gusts as high as 21 mph.

Sunday Nov 16

Sunny

Day: Sunny, with a high near 58. North wind 3 to 7 mph.

Mostly Clear

Night: Mostly clear, with a low around 37. Calm wind.

Monday Nov 17

Showers

Day: A 20 percent chance of showers after noon. Mostly sunny, with a high near 58.

Thunderstorms

Night: Showers and possibly a thunderstorm before 3am, then showers likely. Low around 47. Chance of precipitation is 80%.

Tuesday Nov 18

Partly Sunny

Day: Partly sunny, with a high near 67.

Rain

Night: A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 46.

Wednesday Nov 19

Rain

Day: A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 61.

Rain Likely

Night: Rain likely. Mostly cloudy, with a low around 50. Chance of precipitation is 60%.

Thursday Nov 20

Thunderstorms

Day: Rain and possibly a thunderstorm. High near 63. Chance of precipitation is 80%.

Rain Likely

Night: Rain likely. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.

Friday Nov 21

Rain

Day: A 40 percent chance of rain. Mostly cloudy, with a high near 64.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.