Hartley Weather Forecast

    • 20
    • 39

    Mostly Cloudy

    • 26
    • 41

    Breezy

    • -2
    • 31

    Slight Chance Snow

    • 21
    • 33

    Mostly Cloudy

    • 11
    • 31

    Mostly Cloudy

    • 17
    • 27

    Mostly Cloudy

Today 16 Dec O'Brien

Partly sunny. Highs in the upper 30s. Southwest Winds 10 to 15 Mph, becoming west this afternoon.

Tonight 16 Dec O'Brien

Mostly cloudy. Lows around 20. West Winds 10 to 15 Mph.

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Hartley Temperature Statistics

December Temperature

Spencer Municipal Airport (13 miles)

  • Lowest 4 December, 2025

    -16.1 °F

  • Average December

    15.5 °F

  • Highest 9 December, 2025

    41 °F

Climate (2020–Present)

Spencer Municipal Airport (13 miles)

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  • Average Low 2020–2025

    37.7 °F

  • Average 2020–2025

    49.2 °F

  • Average High 2020–2025

    60.7 °F
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