September weather forecastSouth Branch, MI
September
Weather in September
The first month of the autumn, September, is also an agreeable month in South Branch, Michigan, with temperature in the range of an average high of 69.8°F (21°C) and an average low of 50.9°F (10.5°C).Temperature
September brings a slight decrease in the average high-temperature, shifting from a warm 77.2°F (25.1°C) in August to an agreeable 69.8°F (21°C). During September, South Branch consistently records a temperature low averaging a cool 50.9°F (10.5°C).Humidity
In September, the average relative humidity is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 11.5 days and accumulates 0.98" (25mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In South Branch, the average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:59 am and sunset at 8:11 pm. On the last day of September, sunrise is at 7:33 am and sunset at 7:17 pm EDT.
Sunshine
In South Branch, Michigan, the average sunshine in September is 8h.UV index
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 the ordinary person.Note: In September, the maximum UV index of 3 suggests these recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
South Branch, MI
- Average high temperature in September: 69.8°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (58.3°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure in September
South Branch, 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 (29.92"Hg).
Average wind speed in September
South Branch, MI
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in September
South Branch, MI
- Average humidity in September: 79%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is May (72%).
Average rainfall in September
South Branch, MI
- Average rainfall in September: 0.98"
The wettest months (with the highest rainfall) are May and October (2.68").
The driest month (with the least rainfall) is September (0.98").
Average rainfall days in September
South Branch, MI
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is October (16.3 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in September
South Branch, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (8.03").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
South Branch, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (21 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
South Branch, 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 0min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 12min).
Average sunshine days in September
South Branch, 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 February (8.8 days).
Average UV index in September
South Branch, 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
South Branch, MI
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
South Branch, MI
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, July, October and November (6mi).
The month with the lowest visibility is January (4mi).
