Weather in January
In January, the average ocean temperature in Saint Clair, Michigan, is 34.7°F (1.5°C). Note: In the sphere of swimming, this is extremely cold and poses life-endangering hazards. Weather in January »
Weather in February
February and March, with an average ocean temperature of 32.5°F (0.3°C), are months with the coldest seawater in Saint Clair, Michigan. Note: In swimming, this scenario poses immediate life-threatening danger. Weather in February »
Weather in March
February and March, with an average ocean temperature of 32.5°F (0.3°C), are months with the coldest seawater in Saint Clair, Michigan. Note: Regarding swimming, this is extremely cold, hazardous, and can lead to death. Weather in March »
Weather in April
In April, the average ocean temperature in Saint Clair, Michigan, is 37.2°F (2.9°C). Note: When swimming, this is deemed life-endangering and extremely risky. Weather in April »
Weather in May
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. Weather in May »
Weather in June
In Saint Clair, Michigan, in June, the average water temperature is 60.1°F (15.6°C). Note: Most people do not find swimming enjoyable in water of 60.1°F (15.6°C). Weather in June »
Weather in July
In Saint Clair, Michigan, the average seawater temperature in July is 72.1°F (22.3°C). Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 72.1°F (22.3°C) water may be enjoyable. Weather in July »
Weather in August
With an average ocean temperature of 73.8°F (23.2°C), August is the month with the warmest seawater in Saint Clair, Michigan. Note: For someone not comfortable with cold, swimming in 73.8°F (23.2°C) waters might be a stretch. Weather in August »
Weather in September
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). Weather in September »
Weather in October
In Saint Clair, Michigan, in October, the average water temperature is 60.1°F (15.6°C). Note: Most people do not find pleasure in swimming when the water temperature is 60.1°F (15.6°C). Weather in October »
Weather in November
In November, the average ocean temperature in Saint Clair, Michigan, is 49.8°F (9.9°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. Weather in November »
Weather in December
In Saint Clair, Michigan, in December, the average water temperature is 40.6°F (4.8°C). Note: In swimming engagements, this poses immediate life-threatening risks. Weather in December »
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 months are the ocean coldest?
February and March, with an average ocean temperature of 32.5°F (0.3°C), are months with the coldest seawater.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
When are the longest days in Saint Clair?
The month with the longest days is June, with an average of 15h and 18min of daylight.
When is the ocean warmest?
The month with the warmest seawater is August, with an average ocean temperature of 73.8°F (23.2°C).
What is the month with the shortest days?
With an average of 9h and 6min of daylight, December has the shortest days of the year.
Average sea temperature
Saint Clair, MI
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
Saint Clair, MI
- Average daylight in January:
9h and 3min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
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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