September weather forecastFrankfort, MI
September
Weather in September
September marks the commencement of autumn in Frankfort. The nights get longer, temperatures dip, but the days remain comfortably warm. The leaves start changing, offering a riot of colors that are a treat for the eyes. The move from summer to fall is marked by a decrease in average maximum temperatures to 65.8°F (18.8°C). The gentle autumn breeze brings along a unique charm that makes September a desirable month.Temperature
September is characterized by a slight reduction in average high-temperature, easing from a pleasant 71.2°F (21.8°C) in August to a refreshing 65.8°F (18.8°C). Frankfort experiences a subtle drop in temperature during the September nights, recording an average of 56.8°F (13.8°C).Humidity
In September, the average relative humidity is 78%.Rainfall
In September, the rain falls for 10 days. Throughout September, 0.71" (18mm) of precipitation is accumulated. Throughout the year, in Frankfort, there are 94.1 rainfall days, and 7.83" (199mm) of precipitation is accumulated.Snowfall
In Frankfort, snow does not fall in June through September.Daylight
In Frankfort, the average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 7:08 am and sunset at 8:21 pm. On the last day of September, in Frankfort, sunrise is at 7:42 am and sunset at 7:26 pm EDT.
Sunshine
In Frankfort, the average sunshine in September is 8.1h.UV index
In Frankfort, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 3 in September translates into these instructions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Frankfort, MI
- Average high temperature in September: 65.8°F
The warmest month (with the highest average high temperature) is August (71.2°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in September: 56.8°F
The month with the highest average low temperature is August (62.8°F).
The coldest months (with the lowest average low temperature) are January and February (20.7°F).
Average pressure in September
Frankfort, MI
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Frankfort, MI
- Average wind speed in September: 11.4mph
The windiest month (with the highest average wind speed) is January (14.9mph).
The calmest month (with the lowest average wind speed) is July (9.3mph).
Average humidity in September
Frankfort, MI
- Average humidity in September: 78%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are April, October and November (77%).
Average rainfall in September
Frankfort, MI
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is October (0.91").
The driest month (with the least rainfall) is February (0.43").
Average rainfall days in September
Frankfort, MI
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is July (11 days).
The month with the least rainy days is February (2.6 days).
Average snowfall in September
Frankfort, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Frankfort, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Frankfort, MI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 1h and 54min).
Average sunshine days in September
Frankfort, MI
- Average sunshine days in September: 17.7 days
The months with the most sunshine days are March and May (18.8 days).
The month with the least sunshine days is February (14.6 days).
Average UV index in September
Frankfort, 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 and December (UV index 1).
Average cloud cover in September
Frankfort, MI
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 81).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Frankfort, MI
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
