Deer Island Weather Forecast
- 60
- 76
Becoming Sunny
- 61
- 73
Mostly Sunny
- 69
- 80
Partly Sunny
- 74
- 86
Partly Sunny
- 73
- 91
Chance Rain Showers
- 68
- 80
Chance Rain Showers
Today 21 Jul Suffolk
Mostly sunny. Highs in the upper 70s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.
Tonight 21 Jul Suffolk
Mostly clear. Cooler with Lows in the mid 50s. North Winds 10 to 15 Mph.
Deer Island Temperature Statistics
July Temperature
Boston, Logan International Airport (2.5 miles)
Lowest 10 July, 2025
63.6 °FAverage July
76.5 °FHighest 16 July, 2025
95.6 °F
Climate (2020–Present)
Boston, Logan International Airport (2.5 miles)
Average Low 2020–2025
47 °FAverage 2020–2025
53.8 °FAverage High 2020–2025
61.2 °F