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 sea temperature 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
In Trenton, the average high-temperature in September slightly decreases from a warm 77.5°F (25.3°C) in August to an agreeable 72°F (22.2°C). Trenton experiences a mean low-temperature of 59.2°F (15.1°C) during September.Humidity
In Trenton, the average relative humidity in September is 76%.Rainfall
In Trenton, in September, during 13.5 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. In Trenton, during the entire year, the rain falls for 151.6 days and collects up to 26.97" (685mm) of precipitation.Snowfall
In Trenton, snow does not fall in June through October.Ocean temperature
In September, the average ocean temperature is 70.5°F (21.4°C).Note: Most people find swimming in 70.5°F (21.4°C) unenjoyable. As the water temperature falls from 69.8°F (21°C) to 59°F (15°C), controlling one's breathing becomes harder.
Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:58 am and sunset at 8:06 pm. On the last day of September, sunrise is at 7:29 am and sunset at 7:15 pm EDT.
Sunshine
The average sunshine in September is 8.3h.UV index
In Trenton, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: A maximum UV index of 4 in September translates into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Warning! The Sun's UV rays intensify with reflections from sand and water.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September in Trenton?
How much does it rain in September?
When it does not snow?
How cold is the water 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
Trenton, MI
- Average high temperature in September: 72°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in September: 59.2°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in September
Trenton, 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
Trenton, MI
- Average wind speed in September: 8.4mph
The windiest months (with the highest average wind speed) are January and November (10.8mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in September
Trenton, MI
- Average humidity in September: 76%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Trenton, MI
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is December (1.26").
Average rainfall days in September
Trenton, MI
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is February (6.5 days).
Average snowfall in September
Trenton, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.17").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Trenton, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in September
Trenton, MI
- Average sea temperature in September: 70.6°F
The best month for swimming (with the highest average sea temperature) is August (75.4°F).
The coldest month (with the lowest average sea temperature) is February (32.7°F).
Average daylight in September /
Average sunshine in September
Trenton, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Trenton, MI
- Average sunshine days in September: 14 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is July (10.3 days).
Average UV index in September
Trenton, 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
Trenton, MI
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in September
Trenton, MI
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Trenton, Michigan, USA
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