Grenell Weather Forecast
- 27
- 32
Chance Snow
- 26
- 36
Rain/Snow
- 21
- 30
Mostly Cloudy
- 25
- 35
Rain/Snow Likely
- 19
- 35
Rain/Snow Likely
- 21
- 32
Snow Showers Likely
Today 22 Dec Jefferson
Mostly cloudy. A chance of snow Showers through early afternoon. Highs Ranging from the lower 30s inland to the mid 30s along the lake Ontario shore. Light Winds, becoming southwest 5 to 10 Mph. Chance of snow 40 percent.
Tonight 22 Dec Jefferson
Snow likely. Additional accumulation Ranging from an inch or less across the lower Elevations to 1 to 2 Inches on the tug hill. Lows in the upper 20s. Light southwest Winds. Chance of snow 70 percent.
Grenell Temperature Statistics
December Temperature
Watertown, Watertown International Airport (19.9 miles)
Lowest 5 December, 2025
-6 °FAverage December
25.2 °FHighest 19 December, 2025
55 °F
Climate (2020–Present)
Watertown, Watertown International Airport (19.9 miles)
Average Low 2020–2025
38.8 °FAverage 2020–2025
48.6 °FAverage High 2020–2025
57.6 °F