September weather forecastTrenton, UT
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Trenton, Utah, with temperature in the range of an average high of 71.2°F (21.8°C) and an average low of 46.8°F (8.2°C).Temperature
A change in temperatures is noted as August gives way to September, with average highs reducing from a moderately hot 81.1°F (27.3°C) to an agreeable 71.2°F (21.8°C). In September, Trenton endures a notable temperature shift from day to night, with lows averaging at a chilly 46.8°F (8.2°C).Humidity
The average relative humidity in September is 45%.Rainfall
In Trenton, during September, the rain falls for 8.7 days and regularly aggregates up to 1.06" (27mm) of precipitation. Throughout the year, there are 117.9 rainfall days, and 17.68" (449mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Trenton. Throughout September, in the average 0.1 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, in Trenton, there are 71.1 snowfall days, and 56.1" (1425mm) of snow is accumulated.Daylight
In Trenton, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:54 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:10 pm MDT.
Sunshine
In September, the average sunshine in Trenton is 10h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The UV index of 3 in September translates into these instructions:
Take necessary precautions - Suggestions to elude sunburn are provided. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Trenton, UT
- Average high temperature in September: 71.2°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is December (28.6°F).
- Average low temperature in September: 46.8°F
The month with the highest average low temperature is July (55.4°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure in September
Trenton, UT
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Trenton, UT
- Average wind speed in September: 5.3mph
The windiest months (with the highest average wind speed) are April, June and August (5.7mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in September
Trenton, UT
- Average humidity in September: 45%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (38%).
Average rainfall in September
Trenton, UT
- Average rainfall in September: 1.06"
The wettest month (with the highest rainfall) is January (2.24").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days in September
Trenton, UT
- Average rainfall days in September: 8.7 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is November (6.7 days).
Average snowfall in September
Trenton, UT
- Average snowfall in September: 0.2"
The month with the highest snowfall is January (16.73").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Trenton, UT
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (15.9 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Trenton, UT
- Average daylight in September: 12h and 30min
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: 10h and 0min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Trenton, UT
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is October (19.4 days).
The month with the least sunshine days is February (9.1 days).
Average UV index in September
Trenton, UT
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Trenton, UT
- Average cloud cover in September: 15
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in September
Trenton, UT
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
