Frenchman Island Weather Forecast
- 59
- 79
Rain Showers
- 56
- 70
Mostly Sunny
- 63
- 77
Partly Sunny
- 62
- 78
Rain Showers
- 57
- 73
Rain Showers Likely
- 58
- 72
Mostly Sunny
Today 18 Jul Oswego
Partly sunny with a chance of Showers Early, then Showers likely with a chance of Thunderstorms late this morning. Showers with Thunderstorms likely this afternoon. Areas of smoke through early afternoon. Some Thunderstorms may produce gusty Winds and heavy rainfall this afternoon. Locally heavy rainfall possible late. Highs Ranging from the mid 70s on the tug hill to around 80 across the lower Elevations. Southeast Winds 10 Mph or Less, becoming west 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.
Tonight 18 Jul Oswego
Mostly cloudy. Showers and Thunderstorms likely in the evening. Some Thunderstorms may produce gusty Winds and heavy rainfall in the evening. Muggy with Lows Ranging from the mid 50s across the tug hill to the lower 60s 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.
Frenchman Island Temperature Statistics
July Temperature
Syracuse, Syracuse Hancock International Airport (7.5 miles)
Lowest 12 July, 2026
57.7 °FAverage July
77.5 °FHighest 14 July, 2026
97 °F
Climate (2021–2026)
Syracuse, Syracuse Hancock International Airport (7.5 miles)
Average Low 2021–2026
42.6 °FAverage 2021–2026
51.6 °FAverage High 2021–2026
60.6 °F