September weather forecast
Saint Clair, MI

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Weather in September

Ocean temperature

In September, the average ocean temperature in Saint Clair, Michigan, is 69.4°F (20.8°C).
Note: For the majority, swimming in water with a temperature of 69.4°F (20.8°C) is not enjoyable. The difficulty in managing breathing rises as the temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

In September, the average length of the day in Saint Clair, Michigan, is 12h and 29min.
On the first day of September in Saint Clair, 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.
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Frequently asked questions

What is the ocean temperature in September in Saint Clair?

In Saint Clair, in September, the average water temperature 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 Saint Clair, the average day length in September is 12h and 29min.

What time are sunrise and sunset in September in Saint Clair?

In September, on the first day of the month, sunrise is at 6:55 am and sunset at 8:04 pm. On the last day of the month, in Saint Clair, Michigan, 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 - 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).

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Average daylight in September
Saint Clair, MI

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).

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Saint Clair, Michigan, USA

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