Shirley Weather Forecast

    • 56
    • 77

    Chance Rain Showers

    • 58
    • 73

    Rain Showers Likely

    • 59
    • 74

    Rain Showers Likely

    • 54
    • 80

    Mostly Sunny

    • 55
    • 79

    Mostly Sunny

    • 60
    • 82

    Partly Sunny

Today 21 Aug Northwest Middlesex County

Partly sunny. A slight chance of Showers this morning. Highs in the mid 70s. Northeast Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 21 Aug Northwest Middlesex County

Partly cloudy in the Evening, then mostly cloudy with a chance of Showers after midnight. Lows in the mid 50s. North Winds around 5 Mph. Chance of rain 30 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Shirley Temperature Statistics

August Temperature

Fitchburg, Fitchburg Municipal Airport (5 miles)

  • Lowest 16 August, 2026

    52 °F

  • Average August

    74.4 °F

  • Highest 6 August, 2026

    90 °F

Climate (2021–2026)

Fitchburg, Fitchburg Municipal Airport (5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    41.3 °F

  • Average 2021–2026

    51.6 °F

  • Average High 2021–2026

    61.5 °F
Get WillyWeather+ to remove ads