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

FAIRFIELD (FAFI)

Lat: 43.30833°NLon: 114.825°WElev: 5039.0ft.

NA

77°F

25°C

Humidity 16%
Wind Speed WSW 5 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Heat Index77°F (25°C)
Last update 17 Sep 06:00 PM MDT
Extended Forecast for

Fairfield ID

Fire Weather Watch September 18, 03:00am until September 18, 09:00pm
Red Flag Warning September 17, 07:13pm until September 17, 09:00pm
Click here for hazard details and duration
Fire Weather Watch
...
  •  
    Red Flag Warning September 17, 07:13pm until September 17, 09:00pm

    NOW until 9:00pm Thu

    Red Flag Warning

  • Tonight

    Low: 45 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms, mainly between 8am and 4pm. Partly sunny, with a high near 69. West wind 5 to 15 mph becoming south southwest in the morning.

    High: 69 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 40. West wind 11 to 16 mph becoming light after midnight. Chance of precipitation is 20%.

    Low: 40 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after noon. Areas of fog before 10am. Otherwise, partly sunny, with a high near 67. Light west southwest wind increasing to 8 to 13 mph in the morning. Chance of precipitation is 30%.

    High: 67 °F

    Chance
    Showers and
    Areas Fog
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 37. West wind 8 to 13 mph becoming light and variable after midnight.

    Low: 37 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Areas of fog before 9am. Otherwise, sunny, with a high near 73.

    High: 73 °F

    Areas Fog
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms after 10pm. Partly cloudy, with a low around 45. West wind 5 to 11 mph, with gusts as high as 20 mph.
Friday
A 40 percent chance of showers and thunderstorms, mainly between 8am and 4pm. Partly sunny, with a high near 69. West wind 5 to 15 mph becoming south southwest in the morning.
Friday Night
A slight chance of showers and thunderstorms. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 40. West wind 11 to 16 mph becoming light after midnight. Chance of precipitation is 20%.
Saturday
A chance of showers, with thunderstorms also possible after noon. Areas of fog before 10am. Otherwise, partly sunny, with a high near 67. Light west southwest wind increasing to 8 to 13 mph in the morning. Chance of precipitation is 30%.
Saturday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 37. West wind 8 to 13 mph becoming light and variable after midnight.
Sunday
Areas of fog before 9am. Otherwise, sunny, with a high near 73.
Sunday Night
Mostly clear, with a low around 41.
Monday
Sunny, with a high near 74.
Monday Night
Partly cloudy, with a low around 41.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 40.
Wednesday
Sunny, with a high near 75.
Wednesday Night
Mostly clear, with a low around 42.
Thursday
Sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fairfield ID
 43.34°N 114.8°W (Elev. 5075 ft)
Last Update:
12:53 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