Plum Island Weather Forecast
- 67
- 74
Becoming Sunny
- 66
- 77
Chance Thunderstorms
- 61
- 76
Mostly Sunny
- 58
- 70
Chance Thunderstorms
- 58
- 67
Partly Sunny
- 60
- 71
Mostly Sunny
Today 21 Aug Door
Partly cloudy. Highs in the middle 70s. North wind 5 to 10 Mph in the morning becoming light and variable.
Tonight 21 Aug Door
Mostly clear. Lows in the lower 60s. Light and variable wind becoming southwest 5 to 10 Mph after midnight.
Plum Island Temperature Statistics
August Temperature
Ephraim-Gibraltar Airport (16.2 miles)
Lowest 1 August, 2025
54.9 °FAverage August
69.8 °FHighest 8 August, 2025
85.8 °F
Climate (2020–Present)
Ephraim-Gibraltar Airport (16.2 miles)
Average Low 2020–2025
38.9 °FAverage 2020–2025
45.6 °FAverage High 2020–2025
52.8 °F