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

Tropical Moisture Will Bring Heavy to Excessive Rainfall with Possible Flooding This Week

Tropical moisture will surge over the southwest into the central U.S. this week with several days of heavy to excessive rainfall which may bring limited to considerable flooding. Isolated severe thunderstorm gusts and a couple of tornadoes will be possible from southeast New Mexico into west Texas. Read More >

Current conditions at

Macomb Municipal Airport (KMQB)

Lat: 40.52°NLon: 90.65°WElev: 679ft.

Fair

45°F

7°C

Humidity 100%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 29 Sep 1:55 am CDT
Extended Forecast for

Colchester IL

  • Overnight

    Overnight: Mostly clear, with a low around 50. Calm wind.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79. Light southeast wind becoming south 5 to 10 mph in the morning.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 65. South wind around 5 mph.

    Low: 65 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Showers likely before 2pm, then a slight chance of showers after 4pm. Mostly cloudy, with a high near 78. Southeast wind around 5 mph. Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely then
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 68.

    Low: 68 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers. High near 75. Chance of precipitation is 80%. New precipitation amounts between three quarters and one inch possible.

    High: 75 °F

    Showers

  • Thursday Night

    Thursday Night: Showers. Low around 61. Chance of precipitation is 90%.

    Low: 61 °F

    Showers

  • Friday

    Friday: A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 66.

    High: 66 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 50. Calm wind.
Tuesday
Mostly sunny, with a high near 79. Light southeast wind becoming south 5 to 10 mph in the morning.
Tuesday Night
Increasing clouds, with a low around 65. South wind around 5 mph.
Wednesday
Showers likely before 2pm, then a slight chance of showers after 4pm. Mostly cloudy, with a high near 78. Southeast wind around 5 mph. Chance of precipitation is 60%.
Wednesday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 68.
Thursday
Showers. High near 75. Chance of precipitation is 80%. New precipitation amounts between three quarters and one inch possible.
Thursday Night
Showers. Low around 61. Chance of precipitation is 90%.
Friday
A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 66.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 66.
Saturday Night
Mostly cloudy, with a low around 54.
Sunday
Mostly sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 48.
Monday
Sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Colchester IL
 40.42°N 90.78°W (Elev. 669 ft)
Last Update:
1:26 am CDT Sep 29, 2026
Forecast Valid:
2am CDT Sep 29, 2026-6pm CDT Oct 5, 2026
 
Forecast Discussion
 
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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