Riverton Weather Forecast

    • 40
    • 54

    Chance Rain

    • 40
    • 53

    Partly Sunny

    • 46
    • 57

    Rain Likely

    • 46
    • 55

    Rain Likely

    • 43
    • 55

    Chance Rain

    • 21
    • 57

    Chance Rain

Today 23 Dec Western Pendleton

Partly sunny. A chance of Rain, mainly in the morning. Breezy with Highs in the mid 50s. Except in the upper 40s at the higher Elevations. West Winds 20 to 25 Mph with Gusts up to 45 Mph. Chance of rain 50 percent.

Tonight 23 Dec Western Pendleton

Partly cloudy and breezy. Lows in the lower 40s. Except in the mid 30s at the higher Elevations. Northwest Winds 15 to 25 Mph with Gusts up to 45 Mph.

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Riverton Temperature Statistics

December Temperature

Petersburg, Grant County Airport (23 miles)

  • Lowest 15 December, 2025

    6.4 °F

  • Average December

    32.1 °F

  • Highest 17 December, 2025

    61.5 °F

Climate (2020–Present)

Petersburg, Grant County Airport (23 miles)

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  • Average Low 2020–2025

    44.3 °F

  • Average 2020–2025

    55.4 °F

  • Average High 2020–2025

    67.4 °F
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