September weather forecastPetoskey, MI
September
Weather in September
September signals the onset of fall. As temperatures start to decline, a shift in the foliage can be noted. Minimal rain and temperatures averaging around 66.4°F (19.1°C) paint a clear picture of the transition. Diminishing daylight hours coupled with cooling temperatures calls for light jackets during early mornings and late evenings. As the vivid hues of fall start to emerge, vegetable farming and harvest-themed activities become common downtown.Temperature
The shift from August to September coincides with a small decrease in the average high-temperature, down to an enjoyable 66.4°F (19.1°C) from a pleasant 73°F (22.8°C). Petoskey's average low-temperature in the month of September is recorded at a cool 53.1°F (11.7°C).Humidity
In September, the average relative humidity is 78%.Rainfall
In Petoskey, Michigan, in September, it is raining for 11.4 days, with typically 1.97" (50mm) of accumulated precipitation. Throughout the year, there are 129.6 rainfall days, and 23.43" (595mm) of precipitation is accumulated.Snowfall
In Petoskey, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 31min.On the first day of September, sunrise is at 7:02 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 7:21 pm EDT.
Sunshine
In Petoskey, the average sunshine in September is 7.8h.UV index
In Petoskey, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: A typical high UV index of 3 in September suggests the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Petoskey, MI
- Average high temperature in September: 66.4°F
The warmest months (with the highest average high temperature) are July and August (73°F).
The month with the lowest average high temperature is January (25°F).
- Average low temperature in September: 53.1°F
The month with the highest average low temperature is August (58.6°F).
The coldest month (with the lowest average low temperature) is February (16.7°F).
Average pressure in September
Petoskey, MI
- Average pressure in September: 30.01"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).
Average wind speed in September
Petoskey, MI
- Average wind speed in September: 8.5mph
The windiest month (with the highest average wind speed) is December (11mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).
Average humidity in September
Petoskey, MI
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is May (74%).
Average rainfall in September
Petoskey, MI
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is October (2.76").
The driest month (with the least rainfall) is February (1.34").
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).
Average snowfall in September
Petoskey, MI
- Average snowfall in September: 0"
The month with the highest snowfall is December (8.23").
The months with the least snowfall are June, July, August and September (0").
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).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Petoskey, MI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 7h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 1h and 24min).
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).
Average UV index in September
Petoskey, 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, November and December (UV index 1).
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).
Average visibility in September
Petoskey, MI
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
