September weather forecast
Petoskey, MI

A panorama of the scenic Petoskey, Michigan
A panorama of the scenic Petoskey, Michigan

Weather in September

The first month of the autumn, September, is still a comfortable month in Petoskey, Michigan, with average temperature varying between 66.4°F (19.1°C) and 53.1°F (11.7°C).

Temperature

In September, the average high-temperature slightly decreases, from a pleasant 73°F (22.8°C) in August, to a comfortable 66.4°F (19.1°C). In Petoskey, in September, the average low-temperature is 53.1°F (11.7°C).

Humidity

The average relative humidity in Petoskey is 78%.

Rainfall

In September, the rain falls for 11.4 days. Throughout September, 1.97" (50mm) of precipitation is accumulated. Throughout the year, in Petoskey, there are 129.6 rainfall days, and 23.43" (595mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In Petoskey, Michigan, the average length of the day is 12.5h.

Sunshine

In Petoskey, the average sunshine in September is 7.8h.

UV index

In Petoskey, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for average individuals.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. 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 average humidity in September in Petoskey?

In September, the average relative humidity in Petoskey is 78%.

How much does it rain in Petoskey in September?

In Petoskey, in September, it is raining for 11.4 days, with typically 1.97" (50mm) of accumulated precipitation.

When it does not snow in Petoskey?

June through September are months without snowfall.

Does it snow in Petoskey in September?

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

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

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

How long on average sun shines in September in Petoskey?

The average sunshine in September in Petoskey, Michigan, is 7.8h.

How high is the UV index in September in Petoskey?

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

Average temperature in September
Petoskey, MI

Average temperature in September - Petoskey, MI
  • Average high temperature in September: 19.1°C

The warmest months (with the highest average high temperature) are July and August (22.8°C).
The month with the lowest average high temperature is January (-3.9°C).

  • Average low temperature in September: 11.7°C

The month with the highest average low temperature is August (14.8°C).
The coldest month (with the lowest average low temperature) is February (-8.5°C).

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Average pressure in September
Petoskey, MI

Average pressure in September - Petoskey, MI
  • Average pressure in September: 1016.4mbar

The month with the highest atmospheric pressure is March (1018.8mbar).
The month with the lowest atmospheric pressure is June (1013.2mbar).

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Average wind speed in September
Petoskey, MI

Average wind speed in September - Petoskey, MI
  • Average wind speed in September: 13.7km/h

The windiest month (with the highest average wind speed) is December (17.7km/h).
The calmest month (with the lowest average wind speed) is July (11.8km/h).

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Average humidity in September
Petoskey, MI

Average humidity in September - Petoskey, MI
  • Average humidity in September: 78%

Months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is May (74%).

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Average rainfall in September
Petoskey, MI

Average rainfall in September - Petoskey, MI
  • Average rainfall in September: 50mm

The wettest month (with the highest rainfall) is October (70mm).
The driest month (with the least rainfall) is February (34mm).

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Average rainfall days in September
Petoskey, MI

Average rainfall days in September - Petoskey, MI
  • Average rainfall days in September: 11.4 days

The month with the highest number of rainy days is October (18 days).
The month with the least rainy days is February (3.7 days).

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Average snowfall in September
Petoskey, MI

Average snowfall in September - Petoskey, MI
  • Average snowfall in September: 0mm

The month with the highest snowfall is December (209mm).
Months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in September
Petoskey, MI

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

The month with the highest number of snowfall days is January (21.5 days).
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
Petoskey, MI

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

The month with the longest days is June (Average daylight: 15.6h).
The month with the shortest days is December (Average daylight: 8.8h).

  • Average sunshine in September: 7.8h

The month with the most sunshine is July (Average sunshine: 10.1h).
The month with the least sunshine is January (Average sunshine: 1.4h).

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Average sunshine days in September
Petoskey, MI

Average sunshine days in September - Petoskey, MI
  • Average sunshine days in September: 16 days

The month with the most sunshine days is September (16 days).
The month with the least sunshine days is January (6.2 days).

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Average UV index in September
Petoskey, MI

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

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

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Average cloud cover in September
Petoskey, MI

Average cloud cover in September - Petoskey, MI
  • Average cloud cover in September: 35

The month with the most cloud cover is January (Cloud cover 85).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in September
Petoskey, MI

Average visibility in September - Petoskey, MI
  • Average visibility in September: 9km

Months with the highest visibility are April, May, June, July, August, September, October and November (9km).
The month with the lowest visibility is January (7km).

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