Port Vivian Weather Forecast
- 56
- 76
Rain Showers
- 56
- 76
Mostly Sunny
- 62
- 78
Partly Sunny
- 62
- 81
Rain Showers
- 56
- 75
Chance Thunderstorms
- 58
- 77
Partly Sunny
Today 18 Jul Jefferson
Showers and Thunderstorms. Some Thunderstorms may produce gusty Winds and heavy rainfall. Highs Ranging from the lower 70s on the tug hill to the mid 70s across the lower Elevations. Southwest Winds 10 to 15 Mph with Gusts up to 35 Mph. Chance of rain near 100 percent.
Tonight 18 Jul Jefferson
Mostly cloudy with Showers and Thunderstorms likely in the Evening, then partly cloudy overnight. Some Thunderstorms may produce gusty Winds and heavy rainfall in the evening. Breezy with Lows Ranging from the mid 50s across the tug hill to the upper 50s along the lake Ontario shore. West Winds 10 to 15 Mph with Gusts up to 30 Mph, becoming northwest 5 to 10 Mph. Chance of rain 70 percent.
Port Vivian Temperature Statistics
July Temperature
Fort Drum / Wheeler-Sack U. S. Army Airfield (21.1 miles)
Lowest 12 July, 2026
59 °FAverage July
74.8 °FHighest 1 July, 2026
90 °F
Climate (2021–2026)
Fort Drum / Wheeler-Sack U. S. Army Airfield (21.1 miles)
Average Low 2021–2026
39.3 °FAverage 2021–2026
47.8 °FAverage High 2021–2026
55.9 °F