Port Vivian Weather Forecast
- 58
- 80
Chance Thunderstorms
- 56
- 78
Chance Thunderstorms
- 51
- 75
Mostly Sunny
- 52
- 74
Partly Sunny
- 58
- 76
Chance Rain Showers
- 56
- 77
Partly Sunny
Today 12 Aug Jefferson
Some patchy fog in the Morning, otherwise sunny. Highs Ranging from the mid 70s on the tug hill to the upper 70s across the lower Elevations. West Winds 10 Mph or less.
Tonight 12 Aug Jefferson
Partly cloudy with a chance of Showers and Thunderstorms in the Evening, then mostly cloudy with a chance of Showers overnight. Some patchy fog developing. Lows Ranging from the upper 50s across the tug hill to the lower 60s along the lake Ontario shore. Light Winds. Chance of rain 50 percent.
Port Vivian Temperature Statistics
August Temperature
Fort Drum / Wheeler-Sack U. S. Army Airfield (21.1 miles)
Lowest 5 August, 2026
60.1 °FAverage August
73.6 °FHighest 5 August, 2026
86.7 °F
Climate (2021–2026)
Fort Drum / Wheeler-Sack U. S. Army Airfield (21.1 miles)
Average Low 2021–2026
39.4 °FAverage 2021–2026
47.8 °FAverage High 2021–2026
55.9 °F