Shirley Weather Forecast

    • 17
    • 30

    Becoming Sunny

    • 15
    • 31

    Mostly Sunny

    • 21
    • 35

    Chance Snow

    • 14
    • 30

    Chance Snow

    • 16
    • 26

    Slight Chance Snow Showers

    • 16
    • 31

    Partly Sunny

Today 11 Dec Northwest Middlesex County

Mostly sunny. A slight chance of Flurries. Cooler with Highs around 30. West Winds 15 to 20 Mph with Gusts up to 45 Mph.

Tonight 11 Dec Northwest Middlesex County

Partly cloudy. Cooler with Lows around 16. West Winds 15 to 20 Mph with Gusts up to 50 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Shirley Temperature Statistics

December Temperature

Fitchburg, Fitchburg Municipal Airport (5 miles)

  • Lowest 9 December, 2025

    1.9 °F

  • Average December

    25.1 °F

  • Highest 1 December, 2025

    39.9 °F

Climate (2020–Present)

Fitchburg, Fitchburg Municipal Airport (5 miles)

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  • Average Low 2020–2025

    41.7 °F

  • Average 2020–2025

    51.8 °F

  • Average High 2020–2025

    61.7 °F
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