September weather forecast
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 temperature in the range of an average high of 69.3°F (20.7°C) and an average low of 57.9°F (14.4°C).

Temperature

In September, the average high-temperature marginally drops from a warm 75.4°F (24.1°C) in August to a pleasant 69.3°F (20.7°C). The average low-temperature, in September, is 57.9°F (14.4°C).

Humidity

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

Rainfall

In Muskegon, in September, during 12.4 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. Throughout the year, there are 124.4 rainfall days, and 11.42" (290mm) of precipitation is accumulated.

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: For most, swimming in 66.2°F (19°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

The average length of the day in September in Muskegon is 12h and 29min.
On the first day of September in Muskegon, sunrise is at 7:09 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 7:28 pm EDT.

Sunshine

The average sunshine in September in Muskegon is 8.3h.

UV index

In Muskegon, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Muskegon?

The average high-temperature, in September, 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?

The average relative humidity in September in Muskegon is 77%.

How much does it rain in Muskegon in September?

In Muskegon, in September, it is raining for 12.4 days, with typically 1.14" (29mm) of accumulated precipitation.

When it does not snow in Muskegon?

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

Does it snow in Muskegon in September?

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

What is the ocean temperature in September in Muskegon?

In Muskegon, the average seawater temperature in September is 66.2°F (19°C). For swimming, a surface water temperature of 66.2°F (19°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 Muskegon have in September?

In Muskegon, Michigan, the average day length in September is 12h and 29min.

When are sunrise and sunset in September in Muskegon?

On the first day of September, sunrise is at 7:09 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 7:28 pm EDT.

How many hours of sunshine does Muskegon have in September?

In September, the average sunshine duration 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 UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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"Hg

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

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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%).
The 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").
The 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).
The 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: 12h and 29min

The month with the longest days is June (Average daylight: 15h and 20min).
The month with the shortest days is December (Average daylight: 9h and 2min).

  • Average sunshine in September: 8h and 18min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).

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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

The months with the highest UV index are July and August (UV index 6).
The 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

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

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