September weather forecast and climate
Muskegon, MI

An aerial panorama of the scenic Muskegon Town in Michigan
An aerial panorama of the scenic Muskegon Town in Michigan

Weather in September

September, the first month of the autumn, in Muskegon, is still a pleasant month, with average temperature ranging between min 57.9°F (14.4°C) and max 69.3°F (20.7°C).

Temperature

In September, the average high-temperature marginally drops, from a moderately hot 75.4°F (24.1°C) in August, to an agreeable 69.3°F (20.7°C). In September, in Muskegon, the average low-temperature is 57.9°F (14.4°C).

Humidity

In Muskegon, the average relative humidity in September is 77%.

Rainfall

In Muskegon, during September, the rain falls for 12.4 days and regularly aggregates up to 1.14" (29mm) of precipitation. In Muskegon, during the entire year, the rain falls for 124.4 days and collects up to 11.42" (290mm) of precipitation.

Snowfall

In Muskegon snow does not fall in May through September.

Ocean temperature

In September, the average ocean temperature in Muskegon is 66.2°F (19°C).
Note: Swimming in 66.2°F (19°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

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

Sunshine

The average sunshine in Muskegon is 8.3h.

UV index

In Muskegon, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 4 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
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FAQ

What is the temperature in September in Muskegon?

The average high-temperature, in September, in Muskegon, Michigan, is 69.3°F (20.7°C), while the average low-temperature is 57.9°F (14.4°C).

What is the average humidity in September in Muskegon?

In Muskegon, the average relative humidity in September is 77%.

How much does it rain in Muskegon in September?

In Muskegon, Michigan, during September, the rain falls for 12.4 days and regularly aggregates up to 1.14" (29mm) of precipitation.

Does it snow in Muskegon in September?

In Muskegon, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Muskegon?

In Muskegon, Michigan, snow does not fall in May through September.

What is the ocean temperature in September in Muskegon?

In September, the average ocean temperature in Muskegon, Michigan, is 66.2°F (19°C). Swimming in 66.2°F (19°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Muskegon have in September?

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

How long on average sun shines in September in Muskegon?

The average sunshine in September in Muskegon is 8.3h.

What is the UV index reading in September in Muskegon?

In September, the average daily maximum UV index in Muskegon is 4. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to the UV radiation.

Average temperature in September
Muskegon, MI

Average temperature in September - Muskegon, MI
  • Average high temperature in September: 69.3°F

The warmest months (with the highest average high temperature) are July and August (75.4°F).
The month with the lowest average high temperature is January (28.9°F).

  • Average low temperature in September: 57.9°F

The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

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Average pressure in September
Muskegon, MI

Average pressure in September - Muskegon, MI
  • Average pressure in September: 30.03"

The month with the highest atmospheric pressure is March (30.09").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed in September
Muskegon, MI

Average wind speed in September - Muskegon, MI
  • Average wind speed in September: 9.7mph

The windiest month (with the highest average wind speed) is November (12.4mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).

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Average humidity in September
Muskegon, MI

Average humidity in September - Muskegon, MI
  • Average humidity in September: 77%

The month with the highest relative humidity is January (84%).
Months with the lowest relative humidity are April, October and November (76%).

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Average rainfall in September
Muskegon, MI

Average rainfall in September - Muskegon, MI
  • Average rainfall in September: 1.14"

The wettest month (with the highest rainfall) is October (1.38").
The driest month (with the least rainfall) is February (0.55").

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Average rainfall days in September
Muskegon, MI

Average rainfall days in September - Muskegon, MI
  • Average rainfall days in September: 12.4 days

The month with the highest number of rainy days is October (14.9 days).
The month with the least rainy days is February (4 days).

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Average snowfall in September
Muskegon, MI

Average snowfall in September - Muskegon, MI
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.05").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Muskegon, MI

Average snowfall days in September - Muskegon, MI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (16.6 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in September
Muskegon, MI

Average sea temperature in September - Muskegon, MI
  • Average sea temperature in September: 66°F

The best month for swimming (with the highest average sea temperature) is August (70°F).
The coldest months (with the lowest average sea temperature) are February, March and April (37°F).

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Average daylight in September /
Average sunshine in September
Muskegon, MI

Average daylight in September / Average sunshine in September - Muskegon, MI
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9h).

  • Average sunshine in September: 8.3h

The month with the most sunshine is July (Average sunshine: 10.9h).
The month with the least sunshine is January (Average sunshine: 2.3h).

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Average sunshine days in September
Muskegon, MI

Average sunshine days in September - Muskegon, MI
  • Average sunshine days in September: 14.4 days

The month with the most sunshine days is March (17.3 days).
The month with the least sunshine days is January (10.3 days).

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Average UV index in September
Muskegon, MI

Average UV index in September - Muskegon, MI
  • Average UV index in September: 4

Months with the highest UV index are July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in September
Muskegon, MI

Average cloud cover in September - Muskegon, MI
  • Average cloud cover in September: 29

The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is July (Cloud cover 24).

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Average visibility in September
Muskegon, MI

Average visibility in September - Muskegon, MI
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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