Weather in May
Ocean temperature
In Saint Clair, Michigan, the average seawater temperature in May is 44.6°F (7°C).Note: One needs to be cautious in 44.6°F (7°C) waters. 55.4°F (13°C) is already forbidding, but sub14°F (-10°C) can seriously disrupt your breathing and lead to a frigid shock, considering one's well-being.
Daylight
In May, the average length of the day is 14h and 40min.On the first day of May, sunrise is at 6:22 am and sunset at 8:31 pm. On the last day of the month, sunrise is at 5:54 am and sunset at 9:01 pm EDT.
Updated: Jul 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the water temperature in May?
In May, the average ocean temperature is 44.6°F (7°C). Swimming in 44.6°F (7°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.
What is the average length of the day in May?
In Saint Clair, the average day length in May is 14h and 40min.
When are sunrise and sunset in May?
On the first day of May, sunrise is at 6:22 am and sunset at 8:31 pm. On the last day of the month, sunrise is at 5:54 am and sunset at 9:01 pm EDT.
Average sea temperature in May
Saint Clair, MI
- Average sea temperature in May: 44.6°F
The best month for swimming (with the highest average sea temperature) is August (73.7°F).
The coldest month (with the lowest average sea temperature) is February (32.4°F).
Average daylight in May
Saint Clair, MI
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
Saint Clair, Michigan, USA
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