Port Ontario Weather Forecast
- 56
- 77
Chance Thunderstorms
- 55
- 70
Mostly Cloudy
- 60
- 80
Mostly Sunny
- 64
- 86
Chance Rain Showers
- 63
- 83
Chance Thunderstorms
- 64
- 81
Slight Chance Thunderstorms
Today 6 Jun Oswego
Showers likely with a chance of Thunderstorms. Highs Ranging from the lower 70s on the tug hill to the upper 70s across the lower Elevations. Southwest Winds 10 to 15 Mph with Gusts up to 40 Mph, becoming west. Chance of rain 70 percent.
Tonight 6 Jun Oswego
Partly cloudy with a chance of Showers and Thunderstorms in the Evening, then mostly cloudy overnight. Some patchy fog developing overnight. Lows Ranging from the lower 50s on the tug hill to the mid 50s across the lower Elevations. West Winds 10 to 15 Mph with Gusts up to 40 Mph in the Evening, becoming light. Chance of rain 50 percent.
Port Ontario Temperature Statistics
June Temperature
Fulton, Oswego County Airport (17.4 miles)
Lowest 2 June, 2026
41 °FAverage June
60.1 °FHighest 4 June, 2026
80.1 °F
Climate (2021–Present)
Fulton, Oswego County Airport (17.4 miles)
Average Low 2021–2026
40.7 °FAverage 2021–2026
49.4 °FAverage High 2021–2026
58 °F