McGlynn Reservoir Weather Forecast

    • 7
    • 14

    Chance Wintry Mix

    • 4
    • 44

    Chance Wintry Mix

    • 3
    • 18

    Mostly Sunny

    • 20
    • 32

    Partly Sunny

    • 13
    • 40

    Mostly Cloudy

    • 19
    • 34

    Mostly Cloudy

    • 15
    • 34

    Mostly Cloudy

Today 18 Dec Richland

Sunny. Much Colder with Highs 15 to 20. Northwest wind 10 to 15 Mph, becoming southwest 5 to 10 Mph this afternoon. Wind chill Values around 15 below.

Tonight 18 Dec Richland

Mostly cloudy. A chance of snow and freezing rain after midnight. Lows 5 to 10 above. Temperatures rising into the mid 20s after midnight. Southeast wind 5 to 10 Mph, increasing to south 15 to 20 Mph after midnight. Chance of precipitation 50 percent. Wind chill Values around 5 below.

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McGlynn Reservoir Temperature Statistics

December Temperature

Sidney-Richland (6.2 miles)

  • Lowest 13 December, 2025

    -11 °F

  • Average December

    15.8 °F

  • Highest 9 December, 2025

    43 °F

Climate (2020–Present)

Sidney-Richland (6.2 miles)

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  • Average Low 2020–2025

    31.9 °F

  • Average 2020–2025

    43.9 °F

  • Average High 2020–2025

    56.1 °F
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