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 entails a subtle temperature shift, as the average high-temperature eases from a moderately hot 78.3°F (25.7°C) in August to an agreeable 72.5°F (22.5°C). An average nighttime temperature of 54.1°F (12.3°C) is witnessed throughout September.Humidity
The average relative humidity in September is 79%.Rainfall
In Three Rivers, in September, it is raining for 13 days, with typically 1.18" (30mm) of accumulated precipitation. In Three Rivers, during the entire year, the rain falls for 138.1 days and collects up to 17.32" (440mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Three Rivers, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 7:08 am and sunset at 8:15 pm. On the last day of September, sunrise is at 7:39 am and sunset at 7:25 pm EDT.
Sunshine
In Three Rivers, Michigan, the average sunshine in September is 7.9h.UV index
The average daily maximum UV index in September in Three Rivers is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: A typical high UV index of 4 in September suggests the following recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. The Sun's radiation is especially intense around midday; try to stay in shade during this period. 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 usual temperature for Three Rivers in September?
What is the average humidity in September?
How much 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?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Three Rivers, MI
- Average high temperature in September: 72.5°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 (28.6°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in September
Three Rivers, MI
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January, March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Three Rivers, MI
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in September
Three Rivers, 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
Three Rivers, MI
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is June (2.28").
The driest months (with the least rainfall) are January and December (0.83").
Average rainfall days in September
Three Rivers, MI
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in September
Three Rivers, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.19").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Three Rivers, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Three Rivers, 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 48min).
Average sunshine days in September
Three Rivers, MI
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is November (15.8 days).
The month with the least sunshine days is February (11 days).
Average UV index in September
Three Rivers, MI
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Three Rivers, MI
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Three Rivers, MI
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Three Rivers, Michigan, USA
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