September weather forecastAfton, MI
September
Weather in September
September, the first month of the autumn in Afton, is also an enjoyable month, with temperature in the range of an average high of 66.4°F (19.1°C) and an average low of 52.7°F (11.5°C).Temperature
In Afton, the average high-temperature in September slightly decreases from a moderately hot 73.4°F (23°C) in August to an enjoyable 66.4°F (19.1°C). Throughout the month of September, Afton observes an average nighttime temperature of 52.7°F (11.5°C).Humidity
In Afton, the average relative humidity in September is 78%.Rainfall
In Afton, in September, it is raining for 11.8 days, with typically 1.77" (45mm) of accumulated precipitation. In Afton, during the entire year, the rain falls for 129.4 days and collects up to 21.34" (542mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 31min.On the first day of the month, sunrise is at 7:00 am and sunset at 8:15 pm. On the last day of September, in Afton, Michigan, sunrise is at 7:35 am and sunset at 7:19 pm EDT.
Sunshine
In September, the average sunshine in Afton is 7.8h.UV index
In Afton, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In September, an average UV index of 3 transforms into the following instructions:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Afton, MI
- Average high temperature in September: 66.4°F
The warmest month (with the highest average high temperature) is August (73.4°F).
The month with the lowest average high temperature is January (24.1°F).
- Average low temperature in September: 52.7°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 (15.3°F).
Average pressure in September
Afton, 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
Afton, MI
- Average wind speed in September: 7.9mph
The windiest months (with the highest average wind speed) are January and December (10.1mph).
The calmest months (with the lowest average wind speed) are June and July (7.3mph).
Average humidity in September
Afton, MI
- Average humidity in September: 78%
The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is May (74%).
Average rainfall in September
Afton, MI
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is October (2.68").
The driest month (with the least rainfall) is February (1.22").
Average rainfall days in September
Afton, MI
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is October (17.5 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in September
Afton, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (6.69").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Afton, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (22.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Afton, 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 48min).
Average sunshine days in September
Afton, MI
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is January (7 days).
Average UV index in September
Afton, 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
Afton, MI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 81).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Afton, 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).
