Williamstown Lake Weather Forecast
- 72
- 89
Thunderstorms Likely
- 70
- 88
Rain Showers
- 65
- 86
Slight Chance Thunderstorms
- 70
- 87
Chance Thunderstorms
- 67
- 88
Chance Thunderstorms
- 62
- 81
Mostly Sunny
Today 17 Jul Grant
Mostly Sunny, then becoming partly cloudy this late morning and early Afternoon, then becoming mostly cloudy. A slight chance of Showers and Thunderstorms this Morning, then Showers and Thunderstorms likely this afternoon. Highs in the upper 80s. Light and variable Winds, becoming southwest around 5 Mph this afternoon. Chance of rain 70 percent. Heat index Values up to 102.
Tonight 17 Jul Grant
Mostly cloudy with a chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Muggy. Lows in the lower 70s. Southwest Winds around 5 Mph. Chance of rain 50 percent.
Williamstown Lake Temperature Statistics
July Temperature
Cincinnati/Northern Kentucky International Airport (26.7 miles)
Lowest 13 July, 2026
69.1 °FAverage July
79.9 °FHighest 3 July, 2026
95.6 °F
Climate (2021–2026)
Cincinnati/Northern Kentucky International Airport (26.7 miles)
Average Low 2021–2026
47.5 °FAverage 2021–2026
56.7 °FAverage High 2021–2026
66.1 °F