September weather forecast
Sault Ste. Marie, MI

The famous Soo Locks in Sault Ste. Marie, Michigan, with the deepwater section passage for large water vessels
The famous Soo Locks in Sault Ste. Marie, Michigan, with the deepwater section passage for large water vessels

Weather in September

The first month of the autumn, September, is still a comfortable month in Sault Ste. Marie, with average temperature varying between 66.6°F (19.2°C) and 47.7°F (8.7°C).

Temperature

In Sault Ste. Marie, the average high-temperature marginally drops, from a warm 74.7°F (23.7°C) in August, to a comfortable 66.6°F (19.2°C). In Sault Ste. Marie, in September, the average low-temperature is 47.7°F (8.7°C).

Rainfall

The month with the most rainfall in Sault Ste. Marie is September when the rain falls for 12.9 days and typically aggregates up to 3.82" (97mm) of precipitation.

Snowfall

June through September are months without snowfall in Sault Ste. Marie.

Ocean temperature

In Sault Ste. Marie, the average water temperature is 57.2°F (14°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 Sault Ste. Marie, Michigan, the average length of the day in September is 12.5h.

Sunshine

In September, the average sunshine in Sault Ste. Marie is 5.8h.

UV index

In September, the average daily maximum UV index in Sault Ste. Marie is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the rainiest month in Sault Ste. Marie?

September is the month with the most rainfall. Rain falls for 12.9 days and accumulates 3.82" (97mm) of precipitation.

How many days does it rain in September in Sault Ste. Marie?

In Sault Ste. Marie, in September, it is raining for 12.9 days, with typically 3.82" (97mm) of accumulated precipitation.

When it does not snow in Sault Ste. Marie?

June through September are months without snowfall in Sault Ste. Marie, Michigan.

Does it snow in Sault Ste. Marie in September?

In Sault Ste. Marie, in September, it doesn't snow. In October, it regularly snows.

How cold is the water in September in Sault Ste. Marie?

In Sault Ste. Marie, Michigan, the average seawater temperature in September is 57.2°F (14°C). 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.

What is the average length of the day in September in Sault Ste. Marie?

In September, the average length of the day is 12.5h.

How many hours of sunshine does Sault Ste. Marie have in September?

In Sault Ste. Marie, Michigan, the average sunshine in September is 5.8h.

How high is the UV index in September in Sault Ste. Marie?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Sault Ste. Marie, MI

Average temperature in September - Sault Ste. Marie, MI
  • Average high temperature in September: 19.2°C

The warmest month (with the highest average high temperature) is July (24.6°C).
The month with the lowest average high temperature is January (-5°C).

  • Average low temperature in September: 8.7°C

The month with the highest average low temperature is August (12.5°C).
The coldest month (with the lowest average low temperature) is January (-13.6°C).

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Average rainfall in September
Sault Ste. Marie, MI

Average rainfall in September - Sault Ste. Marie, MI
  • Average rainfall in September: 97mm

The wettest month (with the highest rainfall) is September (97mm).
The driest month (with the least rainfall) is February (34mm).

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Average rainfall days in September
Sault Ste. Marie, MI

Average rainfall days in September - Sault Ste. Marie, MI
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is December (18.8 days).
The months with the least rainy days are April and August (10.9 days).

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Average snowfall in September
Sault Ste. Marie, MI

Average snowfall in September - Sault Ste. Marie, MI
  • Average snowfall in September: 0mm

The month with the highest snowfall is December (850.9mm).
The months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in September
Sault Ste. Marie, MI

Average snowfall days in September - Sault Ste. Marie, MI
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is January (19.6 days).
The months with the least snowfall days are June, July and August (0 days).

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Average sea temperature in September
Sault Ste. Marie, MI

Average sea temperature in September - Sault Ste. Marie, MI
  • Average sea temperature in September: 14°C

The best month for swimming (with the highest average sea temperature) is August (15°C).
The coldest months (with the lowest average sea temperature) are February, March and April (2°C).

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Average daylight in September /
Average sunshine in September
Sault Ste. Marie, MI

Average daylight in September / Average sunshine in September - Sault Ste. Marie, MI
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.8h).
The month with the shortest days is December (Average daylight: 8.7h).

  • Average sunshine in September: 5.8h

The month with the most sunshine is July (Average sunshine: 9.8h).
The month with the least sunshine is November (Average sunshine: 2.3h).

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Average UV index in September
Sault Ste. Marie, MI

Average UV index in September - Sault Ste. Marie, MI
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 8).
The months with the lowest UV index are January, November and December (UV index 1).

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