Ayer Weather Forecast
- 57
- 82
Slight Chance Rain Showers
- 44
- 78
Mostly Sunny
- 41
- 70
Mostly Sunny
- 48
- 73
Partly Sunny
- 55
- 77
Mostly Sunny
- 59
- 83
Partly Sunny
Today 18 Sep Northwest Middlesex County
Partly sunny. A slight chance of Showers in the morning. Patchy fog in the morning. Highs in the lower 80s. Light and variable Winds, becoming southwest around 5 Mph in the afternoon. Chance of rain 20 percent.
Tonight 18 Sep Northwest Middlesex County
Mostly cloudy with a 40 percent chance of Showers. Not as cool. Near steady temperature in the mid 50s. Light and variable Winds.
Ayer Temperature Statistics
September Temperature
Fitchburg, Fitchburg Municipal Airport (8.1 miles)
Lowest 11 September, 2025
44.1 °FAverage September
64 °FHighest 6 September, 2025
84 °F
Climate (2020–Present)
Fitchburg, Fitchburg Municipal Airport (8.1 miles)
Average Low 2020–2025
41.8 °FAverage 2020–2025
51.9 °FAverage High 2020–2025
61.8 °F