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 >

Hazardous Weather Conditions

Current conditions at

Buffalo - Johnson County Airport (KBYG)

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

Overcast

64°F

18°C

Humidity 67%
Wind Speed SSE 11 MPH
Barometer 30.18 in (1022.01 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 17 Sep 07:00 PM MDT
Extended Forecast for

Buffalo WY

Flood Watch September 18, 12:00pm until September 20, 06:00pm
Click here for hazard details and duration
Flood Watch

  • Tonight

    Tonight: Partly cloudy, with a low around 57. South southeast wind 6 to 14 mph becoming west southwest after midnight. Winds could gust as high as 23 mph.

    Low: 57 °F

    Partly Cloudy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 77. Light and variable wind becoming east 5 to 9 mph in the morning.

    High: 77 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: Showers and thunderstorms, mainly before 2am. Low around 56. North wind 5 to 8 mph becoming light and variable after midnight. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 56 °F

    Showers then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely, then showers and possibly a thunderstorm after 9am. High near 66. Light and variable wind becoming north northeast 5 to 7 mph in the morning. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 66 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 53. North northwest wind 3 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 53 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 61. North northwest wind 3 to 7 mph. Chance of precipitation is 100%.

    High: 61 °F

    Showers

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 50. North wind around 6 mph becoming light and variable after midnight.

    Low: 50 °F

    Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 57. South southeast wind 6 to 14 mph becoming west southwest after midnight. Winds could gust as high as 23 mph.
Friday
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 77. Light and variable wind becoming east 5 to 9 mph in the morning.
Friday Night
Showers and thunderstorms, mainly before 2am. Low around 56. North wind 5 to 8 mph becoming light and variable after midnight. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers likely, then showers and possibly a thunderstorm after 9am. High near 66. Light and variable wind becoming north northeast 5 to 7 mph in the morning. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm. Low around 53. North northwest wind 3 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Showers and possibly a thunderstorm. High near 61. North northwest wind 3 to 7 mph. Chance of precipitation is 100%.
Sunday Night
A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 50. North wind around 6 mph becoming light and variable after midnight.
Monday
Mostly sunny, with a high near 70.
Monday Night
Mostly clear, with a low around 51.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 53.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 53.
Thursday
Sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Buffalo WY
 44.34°N 106.72°W (Elev. 4797 ft)
Last Update:
6:01 pm MDT Sep 17, 2026
Forecast Valid:
7pm MDT Sep 17, 2026-6pm MDT 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