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

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Current conditions at

Joslin Field - Magic Valley Regional Airport (KTWF)

Lat: 42.4785°NLon: 114.47739°WElev: 4163.0ft.

Rain

66°F

19°C

Humidity 37%
Wind Speed WSW 19 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 39°F (4°C)
Visibility 4.00 mi
Last update 02 Aug 07:00 AM MDT
Extended Forecast for

Castleford ID

  • Today

    Today: Patchy smoke. Sunny, with a high near 85. West wind 13 to 16 mph becoming north northwest in the afternoon. Winds could gust as high as 26 mph.

    High: 85 °F

    Patchy Smoke

  • Tonight

    Tonight: Areas of smoke before 3am, then patchy smoke after 5am. Mostly clear, with a low around 54. North northwest wind 10 to 16 mph becoming west after midnight. Winds could gust as high as 25 mph.

    Low: 54 °F

    Areas Smoke

  • Monday

    Monday: Patchy smoke between 10am and 2pm. Sunny, with a high near 82. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 82 °F

    Patchy Smoke

  • Monday Night

    Monday Night: Patchy smoke after midnight. Mostly clear, with a low around 52. North northwest wind 6 to 11 mph becoming south southwest after midnight. Winds could gust as high as 21 mph.

    Low: 52 °F

    Mostly Clear
    then Patchy
    Smoke

  • Tuesday

    Tuesday: Sunny, with a high near 87. Southwest wind 7 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 92.

    High: 92 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

Detailed Forecast

Today
Patchy smoke. Sunny, with a high near 85. West wind 13 to 16 mph becoming north northwest in the afternoon. Winds could gust as high as 26 mph.
Tonight
Areas of smoke before 3am, then patchy smoke after 5am. Mostly clear, with a low around 54. North northwest wind 10 to 16 mph becoming west after midnight. Winds could gust as high as 25 mph.
Monday
Patchy smoke between 10am and 2pm. Sunny, with a high near 82. West wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Patchy smoke after midnight. Mostly clear, with a low around 52. North northwest wind 6 to 11 mph becoming south southwest after midnight. Winds could gust as high as 21 mph.
Tuesday
Sunny, with a high near 87. Southwest wind 7 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Sunny and hot, with a high near 92.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
Sunny and hot, with a high near 97.
Thursday Night
Clear, with a low around 64.
Friday
Sunny and hot, with a high near 97.
Friday Night
Mostly clear, with a low around 64.
Saturday
Sunny and hot, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castleford ID
 42.52°N 114.88°W (Elev. 3898 ft)
Last Update:
12:29 am MDT Aug 2, 2026
Forecast Valid:
7am MDT Aug 2, 2026-6pm MDT Aug 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

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Chance of Precipitation