Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September marks a gentle change in average high-temperature, declining from August's warm 78.4°F (25.8°C) to an agreeable 72.5°F (22.5°C). Ypsilanti in September experiences a low-temperature average of 55°F (12.8°C).Humidity
In September, the average relative humidity is 78%.Rainfall
In Ypsilanti, in September, during 13.2 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In Ypsilanti, during the entire year, the rain falls for 142.8 days and collects up to 18.23" (463mm) of precipitation.Snowfall
In Ypsilanti, Michigan, snow does not fall in June through September.Daylight
In Ypsilanti, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 7:00 am and sunset at 8:07 pm. On the last day of September, in Ypsilanti, sunrise is at 7:31 am and sunset at 7:17 pm EDT.
Sunshine
The average sunshine in September is 8.1h.UV index
In Ypsilanti, Michigan, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Ypsilanti?
What is the average humidity in September in Ypsilanti?
How much does it rain in Ypsilanti in September?
When it does not snow in Ypsilanti?
Does it snow in Ypsilanti in September?
How many hours of daylight does Ypsilanti have in September?
When is the sunrise / sunset in September in Ypsilanti?
How many hours of sunshine does Ypsilanti have in September?
What is the UV index reading in September in Ypsilanti?
Average temperature in September
Ypsilanti, MI
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in September: 55°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in September
Ypsilanti, MI
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Ypsilanti, MI
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity in September
Ypsilanti, MI
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Ypsilanti, MI
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is May (2.32").
The driest months (with the least rainfall) are February and December (0.87").
Average rainfall days in September
Ypsilanti, MI
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in September
Ypsilanti, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.6").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Ypsilanti, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Ypsilanti, MI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Ypsilanti, MI
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is October (17.3 days).
The months with the least sunshine days are May and July (10.8 days).
Average UV index in September
Ypsilanti, MI
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Ypsilanti, MI
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Ypsilanti, MI
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Ypsilanti, Michigan, USA
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