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
Trenton observes a small decrease in the average high-temperature with the arrival of September, falling from August's moderately hot 79.3°F (26.3°C) to a still warm 73.8°F (23.2°C). An average temperature of 56.3°F (13.5°C) is recorded during the nights in September.Humidity
In September, the average relative humidity is 79%.Rainfall
In Trenton, in September, it is raining for 14.4 days, with typically 1.97" (50mm) of accumulated precipitation. Throughout the year, there are 169.1 rainfall days, and 30.98" (787mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Trenton, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 7:09 am and sunset at 8:12 pm. On the last day of September, sunrise is at 7:37 am and sunset at 7:24 pm EDT.
Sunshine
In Trenton, the average sunshine in September is 8h.UV index
In Trenton, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 4 during September translates into the following guidance:
Make use of precautions - Shielding skin and eyes from injury is a requirement. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature 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?
How many hours of daylight does Trenton have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Trenton have in September?
What is the UV index reading in September?
Average temperature in September
Trenton, IN
- Average high temperature in September: 73.8°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.8°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in September
Trenton, IN
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Trenton, IN
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Trenton, IN
- Average humidity in September: 79%
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Trenton, IN
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is February (1.85").
Average rainfall days in September
Trenton, IN
- Average rainfall days in September: 14.4 days
The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is February (8.2 days).
Average snowfall in September
Trenton, IN
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.74").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Trenton, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Trenton, IN
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Trenton, IN
- Average sunshine days in September: 12.7 days
The month with the most sunshine days is November (15.3 days).
The month with the least sunshine days is May (8.9 days).
Average UV index in September
Trenton, IN
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Trenton, IN
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are June, July and August (Cloud cover 33).
Average visibility in September
Trenton, IN
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Trenton, Indiana, USA
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