Ayer Weather Forecast

    • 68
    • 78

    Rain Showers

    • 55
    • 84

    Chance Rain Showers

    • 46
    • 75

    Mostly Sunny

    • 54
    • 77

    Slight Chance Rain Showers

    • 62
    • 81

    Chance Rain Showers

    • 60
    • 83

    Partly Sunny

Today 9 Sep Northwest Middlesex County

Mostly cloudy. A slight chance of Showers this afternoon. Highs in the upper 70s. Light and variable Winds, becoming south 5 to 10 Mph with Gusts up to 20 Mph this afternoon. Chance of rain 20 percent.

Tonight 9 Sep Northwest Middlesex County

Mostly cloudy. A chance of Showers in the Evening, then Showers after midnight. Not as cool with Lows in the upper 60s. South Winds 5 to 10 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 6 September, 2026

    52 °F

  • Average September

    64.3 °F

  • Highest 2 September, 2026

    73.9 °F

Climate (2021–2026)

Fitchburg, Fitchburg Municipal Airport (8.1 miles)

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  • Average Low 2021–2026

    41.3 °F

  • Average 2021–2026

    51.5 °F

  • Average High 2021–2026

    61.5 °F
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