Ayer Weather Forecast

    • 52
    • 61

    Rain Showers

    • 50
    • 58

    Rain Showers

    • 53
    • 66

    Mostly Cloudy

    • 55
    • 73

    Partly Sunny

    • 62
    • 78

    Partly Sunny

    • 51
    • 76

    Partly Sunny

    • 45
    • 67

    Partly Sunny

Today 27 Sep Northwest Middlesex County

Partly sunny with a 30 percent chance of Showers. Highs in the mid 60s.

Tonight 27 Sep Northwest Middlesex County

Showers with a chance of Thunderstorms. Patchy fog. Some Thunderstorms may produce heavy rainfall after midnight. Lows in the lower 50s. Northeast Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 90 percent.

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Ayer Temperature Statistics

September Temperature

Fitchburg, Fitchburg Municipal Airport (8.1 miles)

  • Lowest 24 September, 2026

    41 °F

  • Average September

    62.2 °F

  • Highest 10 September, 2026

    84.9 °F

Climate (2021–2026)

Fitchburg, Fitchburg Municipal Airport (8.1 miles)

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  • Average Low 2021–2026

    41.2 °F

  • Average 2021–2026

    51.5 °F

  • Average High 2021–2026

    61.5 °F
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