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 start of September comes with a small reduction in the average high-temperature, subtly receding from a warm 82.9°F (28.3°C) in August to a still moderately hot 77.4°F (25.2°C). Trenton observes an average low-temperature of 57.4°F (14.1°C) during September nights.Humidity
In Trenton, the average relative humidity in September is 76%.Rainfall
In Trenton, during September, the rain falls for 11.3 days and regularly aggregates up to 2.52" (64mm) of precipitation. Throughout the year, in Trenton, there are 131.5 rainfall days, and 26.85" (682mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Trenton, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:45 pm. On the last day of September, in Trenton, Missouri, sunrise is at 7:10 am and sunset at 6:57 pm CDT.
Sunshine
In Trenton, the average sunshine in September is 9.2h.UV index
In Trenton, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 5 in September transforms into the following instructions:
Adopt protective measures - It is advised to guard against sun damage. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Trenton in September?
What is the average humidity in September in Trenton?
How much does it rain in Trenton in September?
When it does not snow in Trenton?
Does it snow in Trenton in September?
How many hours of daylight does Trenton have in September?
When are sunrise and sunset in September in Trenton?
How many hours of sunshine does Trenton have in September?
What is the UV index reading in September in Trenton?
Average temperature in September
Trenton, MO
- Average high temperature in September: 77.4°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in September: 57.4°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure in September
Trenton, MO
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Trenton, MO
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is March (10mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in September
Trenton, MO
- Average humidity in September: 76%
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Trenton, MO
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is June (3.9").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in September
Trenton, MO
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in September
Trenton, MO
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.7").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Trenton, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Trenton, MO
- 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 24min).
- Average sunshine in September: 9h 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: 4h and 42min).
Average sunshine days in September
Trenton, MO
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in September
Trenton, MO
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Trenton, MO
- Average cloud cover in September: 30
The months with the most cloud cover are January and March (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Trenton, MO
- 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, Missouri, USA
Weather forecast for your location
2. Allow the app to use your location