Shirley Weather Forecast
- 51
- 76
Becoming Sunny
- 53
- 79
Mostly Sunny
- 64
- 85
Partly Sunny
- 73
- 91
Partly Sunny
- 71
- 98
Chance Thunderstorms
- 67
- 89
Chance Thunderstorms
Today 21 Jul Northwest Middlesex County
Mostly sunny. Cooler with Highs in the mid 70s. Northwest Winds 10 to 15 Mph.
Tonight 21 Jul Northwest Middlesex County
Clear, cooler with Lows in the lower 50s. Northwest Winds 5 to 10 Mph.
Shirley Temperature Statistics
July Temperature
Fitchburg, Fitchburg Municipal Airport (5 miles)
Lowest 5 July, 2025
53.7 °FAverage July
76.9 °FHighest 16 July, 2025
94.6 °F
Climate (2020–Present)
Fitchburg, Fitchburg Municipal Airport (5 miles)
Average Low 2020–2025
41.9 °FAverage 2020–2025
52 °FAverage High 2020–2025
61.8 °F