Rocky River
Ohio, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Rocky River, OH

Ocean temperature

In Rocky River, Ohio, the average seawater temperature in May is 50.5°F (10.3°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

In Rocky River, the average length of the day in May is 14.5h.

How cold is the water in May in Rocky River?

In Rocky River, Ohio, the average seawater temperature in May is 50.5°F (10.3°C). Swimming in 50.5°F (10.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Rocky River have in May?

In May, the average length of the day in Rocky River, Ohio, is 14.5h.
Average sea temperature in May - Rocky River, OH
  • Average sea temperature in May: 50.5°F

The best month for swimming (with the highest average sea temperature) is August (76.3°F).
The coldest month (with the lowest average sea temperature) is February (33.2°F).

Average daylight in May - Rocky River, OH
  • Average daylight in May: 14.5h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.2h).