Black River Bay Weather Forecast
- 60
- 71
Increasing Clouds
- 67
- 75
Chance Thunderstorms
- 63
- 75
Thunderstorms Likely
- 53
- 73
Partly Sunny
- 55
- 74
Mostly Sunny
- 62
- 77
Chance Rain Showers
- 62
- 79
Chance Rain Showers
Today 25 Aug Jefferson
Partly sunny with a 50 percent chance of Showers. Highs Ranging from the mid 60s on the tug hill to the lower 70s across the lower Elevations. Light Winds.
Tonight 25 Aug Jefferson
Partly cloudy. A chance of Showers early. Some patchy fog developing from late evening on. Lows Ranging from the lower 50s across the tug hill to the upper 50s along the lake Ontario shore. Light Winds. Chance of rain 40 percent.
Black River Bay Temperature Statistics
August Temperature
Watertown, Watertown International Airport (4.3 miles)
Lowest 16 August, 2026
47.6 °FAverage August
69.1 °FHighest 5 August, 2026
87.7 °F
Climate (2021–2026)
Watertown, Watertown International Airport (4.3 miles)
Average Low 2021–2026
38.3 °FAverage 2021–2026
48.2 °FAverage High 2021–2026
57.6 °F