September weather forecastUnionville, MI
September
Weather in September
September, the first month of the autumn in Unionville, is also an agreeable month, with temperature in the range of an average high of 70.3°F (21.3°C) and an average low of 53.4°F (11.9°C).Temperature
With the onset of September, Unionville's climate undergoes a slight change as the average high-temperature moves from a moderately hot 76.5°F (24.7°C) in August to a pleasant 70.3°F (21.3°C). During the month of September, Unionville anticipates a mean low-temperature of 53.4°F (11.9°C).Humidity
In Unionville, the average relative humidity in September is 80%.Rainfall
In Unionville, in September, it is raining for 11.4 days, with typically 1.54" (39mm) of accumulated precipitation. In Unionville, during the entire year, the rain falls for 139.6 days and collects up to 21.3" (541mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:58 am and sunset at 8:08 pm. On the last day of September, sunrise is at 7:31 am and sunset at 7:16 pm EDT.
Sunshine
In September, the average sunshine is 7.8h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: The average daily UV index of 3 in September transforms into the following instructions:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. 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
Unionville, MI
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (26.8°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).
Average pressure in September
Unionville, MI
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Unionville, MI
- Average wind speed in September: 7.6mph
The windiest months (with the highest average wind speed) are January, February and April (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in September
Unionville, MI
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in September
Unionville, MI
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is May (2.32").
The driest month (with the least rainfall) is December (1.18").
Average rainfall days in September
Unionville, MI
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is October (15.8 days).
The month with the least rainy days is February (5 days).
Average snowfall in September
Unionville, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Unionville, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Unionville, MI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 7h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in September
Unionville, MI
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is September (16.7 days).
The month with the least sunshine days is February (9.8 days).
Average UV index in September
Unionville, MI
- Average UV index in September: 3
The months with the highest UV index are May, 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
Unionville, MI
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Unionville, MI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
