Ayer Weather Forecast

    • 45
    • 81

    Mostly Sunny

    • 42
    • 65

    Mostly Sunny

    • 51
    • 63

    Rain Showers

    • 47
    • 65

    Chance Rain Showers

    • 45
    • 60

    Chance Rain Showers

    • 45
    • 61

    Slight Chance Rain Showers

Today 18 Sep Northwest Middlesex County

Sunny. Near steady temperature in the upper 70s. Northwest Winds 5 to 10 Mph with Gusts up to 25 Mph.

Tonight 18 Sep Northwest Middlesex County

Partly cloudy. Much cooler with Lows in the mid 40s. North Winds around 5 Mph. Gusts up to 20 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ayer Temperature Statistics

September Temperature

Fitchburg, Fitchburg Municipal Airport (8.1 miles)

  • Lowest 15 September, 2026

    44.1 °F

  • Average September

    64.9 °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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