Sunapee Weather Forecast
- 3
- 32
Gradual Clearing
- 10
- 16
Mostly Cloudy
- 10
- 23
Slight Chance Snow
- 21
- 30
Wintry Mix Likely
- 17
- 36
Chance Rain/Snow
- 13
- 23
Mostly Cloudy
Today 25 Dec Sullivan
Mostly cloudy. A slight chance of snow Showers in the morning. Highs in the lower 30s. Temperatures falling into the mid 20s in the afternoon. Southwest Winds around 10 Mph with Gusts up to 20 Mph, becoming northwest 15 to 20 Mph with Gusts up to 40 Mph in the afternoon. Chance of snow 20 percent.
Tonight 25 Dec Sullivan
Cloudy with a 20 percent chance of snow Showers. Lows around 19. Light and variable Winds.
Sunapee Temperature Statistics
December Temperature
Lebanon Municipal Airport (19.3 miles)
Lowest 9 December, 2025
-8 °FAverage December
25.2 °FHighest 19 December, 2025
57.9 °F
Climate (2020–Present)
Lebanon Municipal Airport (19.3 miles)
Average Low 2020–2025
38.2 °FAverage 2020–2025
48.9 °FAverage High 2020–2025
59.8 °F