Ayer Weather Forecast

    • 47
    • 68

    Increasing Clouds

    • 45
    • 64

    Mostly Cloudy

    • 44
    • 64

    Partly Sunny

    • 45
    • 63

    Chance Rain Showers

    • 47
    • 62

    Chance Rain Showers

    • 48
    • 61

    Chance Rain Showers

Today 21 Sep Northwest Middlesex County

Partly sunny and not as cool. Near steady temperature in the mid 60s. North Winds around 5 Mph.

Tonight 21 Sep Northwest Middlesex County

Mostly cloudy. Lows in the mid 40s. North Winds around 5 Mph.

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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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