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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Stormy Weather Along the East Coast; Extended Warm-up for the West

A strong low pressure system will bring heavy rain, gusty winds, and thunderstorms along the east coast. Isolated severe thunderstorms could produce damaging winds and a few tornadoes in the Southeast. Heavy rains may result in excessive runoff and flash flooding. Building high pressure out west will produce above normal temperatures, especially, in the Pacific Northwest. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

59°F

15°C

Humidity 81%
Wind Speed N 12 mph
Barometer 29.97 in (1014.7 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 23 Apr 2:53 pm CDT
Extended Forecast for

O'Fallon IL

  • This
    Afternoon

    This Afternoon: Isolated showers. Cloudy, with a high near 59. Northeast wind around 11 mph. Chance of precipitation is 20%.

    Isolated
    Showers

    High: 59 °F

  • Tonight

    Tonight: Scattered showers, mainly between 7pm and midnight. Cloudy, with a low around 51. North wind 6 to 9 mph. Chance of precipitation is 30%.

    Scattered
    Showers

    Low: 51 °F

  • Tuesday

    Tuesday: A 20 percent chance of showers. Cloudy, with a high near 65. North wind 8 to 11 mph.

    Slight Chance
    Showers

    High: 65 °F

  • Tuesday
    Night

    Tuesday Night: Mostly cloudy, with a low around 48. North wind 5 to 7 mph.

    Mostly Cloudy

    Low: 48 °F

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 63. North wind 6 to 9 mph.

    Mostly Cloudy

    High: 63 °F

  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 41.

    Partly Cloudy

    Low: 41 °F

  • Thursday

    Thursday: Sunny, with a high near 66.

    Sunny

    High: 66 °F

  • Thursday
    Night

    Thursday Night: A 30 percent chance of showers after 1am. Partly cloudy, with a low around 46.

    Partly Cloudy
    then Chance
    Showers

    Low: 46 °F

  • Friday

    Friday: A 40 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 61.

    Chance
    Showers

    High: 61 °F

Detailed Forecast

This Afternoon
Isolated showers. Cloudy, with a high near 59. Northeast wind around 11 mph. Chance of precipitation is 20%.
Tonight
Scattered showers, mainly between 7pm and midnight. Cloudy, with a low around 51. North wind 6 to 9 mph. Chance of precipitation is 30%.
Tuesday
A 20 percent chance of showers. Cloudy, with a high near 65. North wind 8 to 11 mph.
Tuesday Night
Mostly cloudy, with a low around 48. North wind 5 to 7 mph.
Wednesday
Mostly cloudy, with a high near 63. North wind 6 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 41.
Thursday
Sunny, with a high near 66.
Thursday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 46.
Friday
A 40 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 61.
Friday Night
Mostly clear, with a low around 42.
Saturday
Sunny, with a high near 67.
Saturday Night
Mostly clear, with a low around 47.
Sunday
Sunny, with a high near 72.
Sunday Night
Mostly clear, with a low around 51.
Monday
Sunny, with a high near 75.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
O'Fallon IL
 38.59°N 89.92°W (Elev. 551 ft)
Last Update:
2:13 pm CDT Apr 23, 2018
Forecast Valid:
3pm CDT Apr 23, 2018-6pm CDT Apr 30, 2018
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation