September weather forecastGwinn, MI
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Gwinn, Michigan, with an average temperature fluctuating between 66°F (18.9°C) and 50.2°F (10.1°C).Temperature
Gwinn observes a small decrease in the average high-temperature with the arrival of September, falling from August's agreeable 72.9°F (22.7°C) to an enjoyable 66°F (18.9°C). Throughout the month of September, the average temperature in Gwinn, Michigan, dips to a cool 50.2°F (10.1°C) at night.Humidity
In September, the average relative humidity in Gwinn is 80%.Rainfall
In Gwinn, in September, during 13.8 rainfall days, 1.93" (49mm) of precipitation is typically accumulated. In Gwinn, during the entire year, the rain falls for 133.2 days and collects up to 23.19" (589mm) of precipitation.Snowfall
In Gwinn, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 32min.On the first day of September in Gwinn, sunrise is at 7:11 am and sunset at 8:27 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 7:31 pm EDT.
Sunshine
The average sunshine in September is 7.5h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 3 translates into these guidelines:
Undertake precautions - It is suggested to shield oneself from sunburn. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Gwinn, MI
- Average high temperature in September: 66°F
The warmest month (with the highest average high temperature) is July (73.8°F).
The month with the lowest average high temperature is January (21.6°F).
- Average low temperature in September: 50.2°F
The month with the highest average low temperature is August (56.1°F).
The coldest months (with the lowest average low temperature) are January and February (12.9°F).
Average pressure in September
Gwinn, 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).
Average wind speed in September
Gwinn, MI
- Average wind speed in September: 8.4mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest months (with the lowest average wind speed) are June, July and August (7.3mph).
Average humidity in September
Gwinn, MI
- Average humidity in September: 80%
The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is May (73%).
Average rainfall in September
Gwinn, MI
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is April (2.6").
The driest month (with the least rainfall) is January (1.3").
Average rainfall days in September
Gwinn, MI
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is August (15.7 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in September
Gwinn, MI
- Average snowfall in September: 0"
The month with the highest snowfall is December (9.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Gwinn, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (24 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Gwinn, MI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 7h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 12min).
Average sunshine days in September
Gwinn, MI
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is September (13.9 days).
The month with the least sunshine days is January (5.9 days).
Average UV index in September
Gwinn, MI
- Average UV index in September: 3
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, February and November (UV index 1).
Average cloud cover in September
Gwinn, MI
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 78).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Gwinn, MI
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April, November and December (5mi).
