September weather forecast
Marquette, MI

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Boats docked along the piers on the vast Lake Superior and cars and buildings in the rest of Marquette City, Michigan
Boats docked along the piers on the vast Lake Superior and cars and buildings in the rest of Marquette City, Michigan

Weather in September

September brings subtle hints of autumn to Marquette's weather with a decrease in average high temperature to 65.3°F (18.5°C), signaling the end of summer. The daylight hours noticeably decline, and the frequency of sunny days decreases as well. The transition from summer to fall becomes evident, setting the stage for the colorful spectacle of foliage that defines Michigan's autumns. Chilly mornings and evenings remind residents to slowly return their warm clothes to their wardrobes.

Temperature

In Marquette, entering September brings a subtle temperature decrement, reducing from August's pleasant 72.1°F (22.3°C) to a refreshing 65.3°F (18.5°C). Throughout the nights in September, an average low-temperature of 50°F (10°C) is noted.

Humidity

In September, the average relative humidity is 79%.

Rainfall

In September, in Marquette, the rain falls for 13.6 days. Throughout September, 2.13" (54mm) of precipitation is accumulated. In Marquette, during the entire year, the rain falls for 117.1 days and collects up to 23.35" (593mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In September, the average length of the day is 12h and 32min.
On the first day of the month, sunrise is at 7:10 am and sunset at 8:28 pm. On the last day of September, sunrise is at 7:47 am and sunset at 7:30 pm EDT.

Sunshine

The average sunshine in September is 7.2h.

UV index

In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.
Note: The daily high UV index of 3 in September translates into this advice:
Preventative actions are necessary - Recommendations to ward off sunburn are given. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Opt for tightly woven and loose clothing to enhance protection from the Sun.
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Frequently asked questions

What are September temperatures in Marquette?

In Marquette, in September, the average high-temperature is 65.3°F (18.5°C), and the average low-temperature is 50°F (10°C).

What is the average humidity in September in Marquette?

In Marquette, the average relative humidity in September is 79%.

How much does it rain in Marquette in September?

In Marquette, Michigan, in September, it is raining for 13.6 days, with typically 2.13" (54mm) of accumulated precipitation.

When it does not snow in Marquette?

June through September are months without snowfall in Marquette.

Does it snow in Marquette in September?

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

What is the average length of the day in September in Marquette?

In September, the average day length is 12h and 32min.

When are sunrise and sunset in September in Marquette?

In September, on the first day of the month, sunrise is at 7:10 am and sunset at 8:28 pm. On the last day of the month, in Marquette, sunrise is at 7:47 am and sunset at 7:30 pm EDT.

How long on average sun shines in September in Marquette?

In September, the average sunshine duration is 7.2h.

What is the UV index intensity in September in Marquette?

The average daily maximum UV index in September in Marquette is 3. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Marquette, MI

Average temperature in September - Marquette, MI
  • Average high temperature in September: 65.3°F

The warmest month (with the highest average high temperature) is July (73.2°F).
The month with the lowest average high temperature is January (21.4°F).

  • Average low temperature in September: 50°F

The month with the highest average low temperature is August (56.1°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).

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Average pressure in September
Marquette, MI

Average pressure in September - Marquette, MI
  • Average pressure in September: 30"Hg

The month with the highest atmospheric pressure is March (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in September
Marquette, MI

Average wind speed in September - Marquette, MI
  • Average wind speed in September: 8.7mph

The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest months (with the lowest average wind speed) are June, July and August (7.5mph).

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Average humidity in September
Marquette, MI

Average humidity in September - Marquette, MI
  • Average humidity in September: 79%

The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is May (72%).

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Average rainfall in September
Marquette, MI

Average rainfall in September - Marquette, MI
  • Average rainfall in September: 2.13"

The wettest month (with the highest rainfall) is April (2.91").
The driest month (with the least rainfall) is January (1.26").

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Average rainfall days in September
Marquette, MI

Average rainfall days in September - Marquette, MI
  • Average rainfall days in September: 13.6 days

The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is February (2.3 days).

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Average snowfall in September
Marquette, MI

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

The month with the highest snowfall is December (9.8").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Marquette, MI

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

The month with the highest number of snowfall days is January (23.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Marquette, MI
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in September: 7h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 1h and 48min).

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Average sunshine days in September
Marquette, MI

Average sunshine days in September - Marquette, MI
  • Average sunshine days in September: 14.6 days

The month with the most sunshine days is July (15.8 days).
The month with the least sunshine days is January (7.3 days).

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Average UV index in September
Marquette, MI

Average UV index in September - Marquette, MI
  • Average UV index in September: 3

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).

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Average cloud cover in September
Marquette, MI

Average cloud cover in September - Marquette, MI
  • Average cloud cover in September: 41

The month with the most cloud cover is January (Cloud cover 82).
The month with the least cloud cover is July (Cloud cover 34).

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Average visibility in September
Marquette, MI

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

The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (4mi).

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Marquette, Michigan, USA

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