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

Areas of Dangerous Heat and Heavy Rainfall Today

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley today. Heat Advisories remain in effect. Heavy to excessive rainfall today could bring areas of flooding to parts of the northern High Plains and Midwest into the Ohio Valley. Flood Watches remain in effect. Read More >

Current conditions at

Dillon, Dillon Airport (KDLN)

Lat: 45.2575°NLon: 112.55444°WElev: 5239.0ft.

Clear

66°F

19°C

Humidity 37%
Wind Speed N 0 MPH
Barometer 30.21 in (1023.03 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 20 Sep 05:20 PM MDT
Extended Forecast for

Dillon MT

  • Tonight

    Tonight: Mostly clear, with a low around 39. Calm wind becoming south southwest around 5 mph.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 73. South southwest wind around 5 mph becoming calm in the morning.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 40. Calm wind becoming south southwest around 6 mph in the evening.

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 74. South southwest wind around 6 mph becoming calm in the afternoon.

    High: 74 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 43. South southwest wind 5 to 7 mph.

    Low: 43 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 76. South southwest wind 3 to 7 mph.

    High: 76 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 44. South wind 8 to 10 mph.

    Low: 44 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 79. Light south wind increasing to 5 to 9 mph in the afternoon.

    High: 79 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 39. Calm wind becoming south southwest around 5 mph.
Monday
Sunny, with a high near 73. South southwest wind around 5 mph becoming calm in the morning.
Monday Night
Mostly clear, with a low around 40. Calm wind becoming south southwest around 6 mph in the evening.
Tuesday
Mostly sunny, with a high near 74. South southwest wind around 6 mph becoming calm in the afternoon.
Tuesday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 43. South southwest wind 5 to 7 mph.
Wednesday
Sunny, with a high near 76. South southwest wind 3 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 44. South wind 8 to 10 mph.
Thursday
Mostly sunny, with a high near 79. Light south wind increasing to 5 to 9 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 47.
Friday
Mostly sunny, with a high near 77.
Friday Night
Partly cloudy, with a low around 42.
Saturday
A slight chance of rain. Mostly sunny, with a high near 68.
Saturday Night
Mostly cloudy, with a low around 37.
Sunday
Partly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Dillon MT
 45.22°N 112.65°W (Elev. 5174 ft)
Last Update:
4:46 pm MDT Sep 20, 2026
Forecast Valid:
5pm MDT Sep 20, 2026-6pm MDT Sep 27, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation