Ayer Weather Forecast

    • 57
    • 87

    Severe Tstms

    • 48
    • 67

    Rain Showers

    • 47
    • 74

    Mostly Sunny

    • 48
    • 73

    Partly Sunny

    • 49
    • 71

    Slight Chance Rain Showers

    • 46
    • 79

    Mostly Sunny

    • 44
    • 69

    Mostly Sunny

Today 6 Sep Northwest Middlesex County

Numerous Showers and scattered Thunderstorms. Some Thunderstorms may be severe with damaging Winds, frequent Lightning, and heavy rainfall. Locally heavy rainfall possible. Highs in the mid 80s. Temperature falling into the upper 70s late. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

Tonight 6 Sep Northwest Middlesex County

Mostly cloudy. A chance of Showers with isolated Thunderstorms this Evening, then Showers likely with isolated Thunderstorms after midnight. Lows in the upper 50s. West Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming northwest after midnight. Chance of rain 70 percent.

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Ayer Temperature Statistics

September Temperature

Fitchburg, Fitchburg Municipal Airport (8.1 miles)

  • Lowest 2 September, 2025

    50 °F

  • Average September

    65.7 °F

  • Highest 4 September, 2025

    80.1 °F

Climate (2020–Present)

Fitchburg, Fitchburg Municipal Airport (8.1 miles)

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  • Average Low 2020–2025

    41.8 °F

  • Average 2020–2025

    51.9 °F

  • Average High 2020–2025

    61.8 °F
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