O Fallon, MO Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Clear 64°F
Feels Like 64°F  
Humidity 81% Dew Point 58°F Wind SW 5 MPH Gusts 10 Barometer 29.73 in.755.1 mm
Report from a personal weather station 0.8 miles ENE of central O Fallon
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Point Forecast at a Glance

SatNov 15
Sat Nov 15: Mostly Sunny, High 76F, Low 41F
76
41
SunNov 16
Sun Nov 16: Sunny, High 58F, Low 37F
58
37
MonNov 17
Mon Nov 17: Showers, High 58F, Low 46F
30%
58
46
TueNov 18
Tue Nov 18: Partly Sunny, High 64F, Low 43F
64
43
WedNov 19
Wed Nov 19: Rain, High 60F, Low 49F
30%
60
49
ThuNov 20
Thu Nov 20: Rain, High 62F, Low 49F
80%
62
49
FriNov 21
Fri Nov 21: Rain, High 62F
40%
62
 

7-Day Temperature Trend

Week Ahead Summary

Sharp cooling trend with high temperatures dropping from 76°F to 62°F, falling as low as 58°F. 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 55°F with lows around 35°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, MO 7 Day Weather Forecast Details

Saturday Nov 15

Mostly Sunny

Day: Mostly sunny, with a high near 76. Southwest wind 9 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph.

Mostly Clear

Night: Mostly clear, with a low around 41. North wind 5 to 8 mph.

Sunday Nov 16

Sunny

Day: Sunny, with a high near 58. North wind 3 to 5 mph.

Mostly Clear

Night: Mostly clear, with a low around 37. Light and variable wind.

Monday Nov 17

Showers

Day: A 30 percent chance of showers after noon. Mostly sunny, with a high near 58. Light east wind becoming southeast 6 to 11 mph in the morning. Winds could gust as high as 21 mph.

Thunderstorms

Night: Showers likely before midnight, then a chance of showers and thunderstorms between midnight and 3am, then a chance of showers after 3am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.

Tuesday Nov 18

Partly Sunny

Day: Partly sunny, with a high near 64.

Mostly Cloudy

Night: Mostly cloudy, with a low around 43.

Wednesday Nov 19

Rain

Day: A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 60.

Rain Likely

Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.

Thursday Nov 20

Rain

Day: Rain. High near 62. Chance of precipitation is 80%.

Rain Likely

Night: Rain likely. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.

Friday Nov 21

Rain

Day: A 40 percent chance of rain. Mostly cloudy, with a high near 62.

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.