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
The onset of September brings a small shift in high-temperatures, falling from a warm 78.3°F (25.7°C) in August to a pleasant 72.7°F (22.6°C). During the month of September, the nighttime temperature falls to an average of 54.5°F (12.5°C).Humidity
In Cassopolis, the average relative humidity in September is 79%.Rainfall
In Cassopolis, in September, during 10 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. Throughout the year, there are 112.7 rainfall days, and 10" (254mm) of precipitation is accumulated.Snowfall
In Cassopolis, snow does not fall in June through September.Daylight
In Cassopolis, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 7:10 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 7:26 pm EDT.
Sunshine
In Cassopolis, the average sunshine in September is 7.9h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: A maximum UV index of 4 in September translates into the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Cassopolis in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Cassopolis, MI
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in September
Cassopolis, MI
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January, March, November and December (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Cassopolis, MI
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Cassopolis, MI
- Average humidity in September: 79%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in September
Cassopolis, MI
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is June (1.34").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in September
Cassopolis, MI
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is May (13.8 days).
The months with the least rainy days are January and February (4.1 days).
Average snowfall in September
Cassopolis, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Cassopolis, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Cassopolis, 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: 7h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in September
Cassopolis, MI
- Average sunshine days in September: 17.2 days
The months with the most sunshine days are March and November (18.7 days).
The month with the least sunshine days is June (13.2 days).
Average UV index in September
Cassopolis, MI
- Average UV index in September: 4
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Cassopolis, MI
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Cassopolis, MI
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, July, August and September (5mi).
Cassopolis, Michigan, USA
Weather forecast for your location
2. Allow the app to use your location