September weather forecastAtlanta, MI
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Atlanta, Michigan, with an average temperature varying between 68.9°F (20.5°C) and 49.8°F (9.9°C).Temperature
With the beginning of September, the average high-temperature shows a small decrease, transitioning from a warm 76.5°F (24.7°C) in August to an agreeable 68.9°F (20.5°C). During the month of September, an average low-temperature of 49.8°F (9.9°C) is recorded.Humidity
In Atlanta, the average relative humidity in September is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.3 days and typically collects 1.3" (33mm) of precipitation.Snowfall
In Atlanta, 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 6:59 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 7:18 pm EDT.
Sunshine
In September, the average sunshine is 7.7h.UV index
The average daily maximum UV index in September in Atlanta is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The daily maximum UV index of 3 in September interprets into the following advice:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Atlanta, MI
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (23.5°F).
- Average low temperature in September: 49.8°F
The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).
Average pressure in September
Atlanta, MI
- Average pressure in September: 30.02"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
Atlanta, MI
- Average wind speed in September: 6.4mph
The windiest month (with the highest average wind speed) is April (8.2mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in September
Atlanta, MI
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Atlanta, MI
- Average rainfall in September: 1.3"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is September (1.3").
Average rainfall days in September
Atlanta, MI
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is October (17.5 days).
The months with the least rainy days are January and February (5 days).
Average snowfall in September
Atlanta, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (10.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Atlanta, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (24.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Atlanta, 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 42min
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 42min).
Average sunshine days in September
Atlanta, MI
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is September (14.6 days).
The month with the least sunshine days is February (5.4 days).
Average UV index in September
Atlanta, 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 and December (UV index 1).
Average cloud cover in September
Atlanta, MI
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 83).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in September
Atlanta, MI
- Average visibility in September: 5mi
The months with the highest visibility are May and June (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
