Firth Weather Forecast

    • 31
    • 50

    Patchy Fog

    • 28
    • 49

    Areas Fog

    • 29
    • 48

    Mostly Cloudy

    • 29
    • 48

    Partly Sunny

    • 30
    • 51

    Partly Sunny

    • 33
    • 57

    Partly Sunny

    • 34
    • 56

    Mostly Cloudy

Today 3 Nov Lower Snake River Plain

Mostly sunny. Highs 53 to 60.

Tonight 3 Nov Lower Snake River Plain

Mostly cloudy. Patchy fog after midnight. Lows 29 to 37. Northeast Winds 10 to 15 Mph. Shifting to north after midnight.

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Firth Temperature Statistics

November Temperature

Idaho Falls Regional Airport (15.5 miles)

  • Lowest 1 November, 2026

    43 °F

  • Average November

    45.2 °F

  • Highest 1 November, 2026

    46.9 °F

Climate (2021–2026)

Idaho Falls Regional Airport (15.5 miles)

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  • Average Low 2021–2026

    33.9 °F

  • Average 2021–2026

    47 °F

  • Average High 2021–2026

    60.1 °F
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