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

Hazardous Weather Conditions

Current conditions at

Alma, Gratiot Community Airport (KAMN)

Lat: 43.32°NLon: 84.69°WElev: 751ft.

Fair

90°F

32°C

Humidity 55%
Wind Speed S 7 mph
Barometer 30.05 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 16 Aug 3:55 pm EDT
Extended Forecast for

Sumner MI

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 91. Heat index values as high as 97. West southwest wind around 9 mph.

    High: 91 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly between 10pm and 5am. Mostly cloudy, with a low around 68. West southwest wind around 6 mph becoming light and variable.

    Low: 68 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms, mainly between 11am and 2pm. Cloudy, then becoming mostly sunny during the afternoon, with a high near 78. North northwest wind 6 to 10 mph becoming east northeast in the afternoon.

    High: 78 °F

    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 56. East northeast wind 6 to 11 mph.

    Low: 56 °F

    Mostly Clear

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84. East wind 6 to 10 mph becoming south in the afternoon.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then showers likely after 5am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of thunderstorms before 8pm. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 91. Heat index values as high as 97. West southwest wind around 9 mph.
Tonight
A 50 percent chance of showers and thunderstorms, mainly between 10pm and 5am. Mostly cloudy, with a low around 68. West southwest wind around 6 mph becoming light and variable.
Sunday
A 20 percent chance of showers and thunderstorms, mainly between 11am and 2pm. Cloudy, then becoming mostly sunny during the afternoon, with a high near 78. North northwest wind 6 to 10 mph becoming east northeast in the afternoon.
Sunday Night
Mostly clear, with a low around 56. East northeast wind 6 to 11 mph.
Monday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84. East wind 6 to 10 mph becoming south in the afternoon.
Monday Night
A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then showers likely after 5am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Tuesday
Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Tuesday Night
A chance of thunderstorms before 8pm. Mostly cloudy, with a low around 62.
Wednesday
Partly sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Sunny, with a high near 82.
Thursday Night
Clear, with a low around 57.
Friday
Sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sumner MI
 43.31°N 84.83°W (Elev. 768 ft)
Last Update:
3:03 pm EDT Aug 16, 2025
Forecast Valid:
4pm EDT Aug 16, 2025-6pm EDT Aug 22, 2025
 
Forecast Discussion
 
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Additional Resources

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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