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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >

Current conditions at

Ionia County Airport (KY70)

Lat: 42.94°NLon: 85.06°WElev: 818ft.

Fair

52°F

11°C

Humidity 100%
Wind Speed Calm
Barometer 30.28 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 18 Sep 6:15 am EDT
Extended Forecast for

Greenville MI

  • Today

    Today: Increasing clouds, with a high near 71. East northeast wind 6 to 8 mph.

    High: 71 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 48. East wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 48 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers, with thunderstorms also possible after 2pm. Some of the storms could produce heavy rainfall. High near 63. East wind around 9 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 63 °F

    Heavy Rain

  • Saturday Night

    Saturday Night: Showers likely, mainly before 8pm. Cloudy, with a low around 51. East northeast wind 8 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 51 °F

    Showers
    Likely

  • Sunday

    Sunday: A 40 percent chance of showers. Mostly cloudy, with a high near 65. East northeast wind 10 to 13 mph, with gusts as high as 26 mph.

    High: 65 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 61.

    High: 61 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 71. East northeast wind 6 to 8 mph.
Tonight
A 30 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 48. East wind 8 to 10 mph, with gusts as high as 21 mph.
Saturday
Showers, with thunderstorms also possible after 2pm. Some of the storms could produce heavy rainfall. High near 63. East wind around 9 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday Night
Showers likely, mainly before 8pm. Cloudy, with a low around 51. East northeast wind 8 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
A 40 percent chance of showers. Mostly cloudy, with a high near 65. East northeast wind 10 to 13 mph, with gusts as high as 26 mph.
Sunday Night
Mostly cloudy, with a low around 46.
Monday
Mostly cloudy, with a high near 61.
Monday Night
Mostly cloudy, with a low around 44.
Tuesday
Partly sunny, with a high near 61.
Tuesday Night
Mostly cloudy, with a low around 45.
Wednesday
Partly sunny, with a high near 63.
Wednesday Night
Mostly cloudy, with a low around 46.
Thursday
Partly sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Greenville MI
 43.16°N 85.26°W (Elev. 801 ft)
Last Update:
6:03 am EDT Sep 18, 2026
Forecast Valid:
6am EDT Sep 18, 2026-6pm EDT Sep 24, 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