Monthly weather forecast and climate
Willoughby, OH

Average sea temperature - Willoughby, OH

The best month for swimming (with the highest average sea temperature) is August (75.7°F).
The coldest month (with the lowest average sea temperature) is February (32.5°F).

Average daylight - Willoughby, OH

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.2h).