Firth Weather Forecast

    • 30
    • 34

    Rain/Snow

    • 31
    • 37

    Rain/Snow Likely

    • 32
    • 37

    Rain/Snow

    • 33
    • 40

    Snow Likely

    • 23
    • 42

    Rain/Snow Likely

    • 11
    • 33

    Chance Snow

    • 16
    • 28

    Chance Snow

Today 31 Jan Lower Snake River Plain

Mostly cloudy. A chance of snow in the afternoon. Not as cold. Little or no snow accumulation. Highs 32 to 39. Northeast Winds around 10 Mph. Shifting to south in the afternoon.

Tonight 31 Jan Lower Snake River Plain

Snow and rain in the evening. Then a chance of rain and snow after midnight. Patchy blowing snow after midnight. Not as cold. Snow accumulation up to 1 inch. Lows 27 to 35. Southwest Winds 10 to 20 Mph.

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Firth Temperature Statistics

January Temperature

Idaho Falls Regional Airport (15.5 miles)

  • Lowest 20 January, 2025

    -19.2 °F

  • Average January

    15.6 °F

  • Highest 4 January, 2025

    39.7 °F

Climate (2020–Present)

Idaho Falls Regional Airport (15.5 miles)

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  • Average Low 2020–2025

    32.6 °F

  • Average 2020–2025

    45.6 °F

  • Average High 2020–2025

    58.3 °F
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