Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Buffalo - Johnson County Airport (KBYG)

Lat: 44.38122°NLon: 106.71947°WElev: 4925.0ft.

light rain,mist

51°F

11°C

Humidity 96%
Wind Speed NW 5 MPH
Barometer 30.16 in (1021.34 mb)
Dewpoint 50°F (10°C)
Visibility 3.00 mi
Last update 20 Sep 08:41 AM MDT
Extended Forecast for

21 Miles SW Buffalo WY

Flood Watch September 20, 08:58am until September 20, 06:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch September 20, 08:58am until September 20, 06:00pm

    NOW until 6:00pm Sun

    Flood Watch

  • Today

    High: 48 °F

    Showers

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly before 8pm.  Cloudy, then gradually becoming partly cloudy, with a low around 37. Calm wind becoming west around 5 mph after midnight.

    Low: 37 °F

    Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 3pm.  Partly sunny, with a high near 57. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 57 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 39. Light and variable wind becoming west 5 to 8 mph in the evening.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 65. West wind 7 to 11 mph becoming south southwest in the afternoon.

    High: 65 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after midnight.  Partly cloudy, with a low around 44. West wind 6 to 9 mph.

    Low: 44 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after noon.  Mostly sunny, with a high near 63. West wind 7 to 11 mph, with gusts as high as 20 mph.  Chance of precipitation is 30%.

    High: 63 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

Detailed Forecast

Today
Showers and possibly a thunderstorm, mainly before 5pm, then a chance of showers and thunderstorms after 5pm. High near 48. West northwest wind 3 to 6 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
A 40 percent chance of showers and thunderstorms, mainly before 8pm. Cloudy, then gradually becoming partly cloudy, with a low around 37. Calm wind becoming west around 5 mph after midnight.
Monday
A 20 percent chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 57. Calm wind becoming south 5 to 7 mph in the afternoon.
Monday Night
Mostly clear, with a low around 39. Light and variable wind becoming west 5 to 8 mph in the evening.
Tuesday
Sunny, with a high near 65. West wind 7 to 11 mph becoming south southwest in the afternoon.
Tuesday Night
A 20 percent chance of showers after midnight. Partly cloudy, with a low around 44. West wind 6 to 9 mph.
Wednesday
A chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 63. West wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Wednesday Night
Mostly clear, with a low around 43.
Thursday
Sunny, with a high near 67.
Thursday Night
Mostly clear, with a low around 46.
Friday
Sunny, with a high near 69. Breezy.
Friday Night
Mostly clear, with a low around 48. Breezy.
Saturday
Mostly sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
21 Miles SW Buffalo WY
 44.09°N 106.96°W (Elev. 7999 ft)
8:19 am MDT Sep 20, 2026
8am MDT Sep 20, 2026-6pm MDT Sep 26, 2026
 
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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