Weather in September
Ocean temperature
In September, the average ocean temperature in Saint Clair, Michigan, is 69.4°F (20.8°C).Note: Swimming is not a pleasurable activity for the majority in water at 69.4°F (20.8°C). Breathing control gets harder as the water temperature dips from 69.8°F (21°C) to 59°F (15°C).
Daylight
In Saint Clair, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:55 am and sunset at 8:04 pm. On the last day of September, sunrise is at 7:26 am and sunset at 7:12 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 ocean temperature in September in Saint Clair?
In Saint Clair, the average seawater temperature in September is 69.4°F (20.8°C). For swimming, a surface water temperature of 69.4°F (20.8°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).
How many hours of daylight does Saint Clair have in September?
In September, the average day length is 12h and 29min.
What time are sunrise and sunset in September?
On the first day of September, sunrise is at 6:55 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:12 pm EDT.
Average sea temperature in September
Saint Clair, MI
- Average sea temperature in September: 69.4°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 September
Saint Clair, MI
- Average daylight in September: 12h and 3min
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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