September weather forecastPlymouth, UT
September
Weather in September
The first month of the autumn, September, is still a warm month in Plymouth, Utah, with an average temperature varying between 74.3°F (23.5°C) and 51.3°F (10.7°C).Temperature
With the onset of September, Plymouth experiences a modest temperature adjustment, with the average high-temperature receding from 84.9°F (29.4°C) in August to a still moderately hot 74.3°F (23.5°C). Plymouth observes a dramatic plunge from daytime highs in September, settling at an average low-temperature of 51.3°F (10.7°C).Humidity
The average relative humidity in September in Plymouth is 41%.Rainfall
In Plymouth, Utah, in September, during 8.3 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. In Plymouth, during the entire year, the rain falls for 120 days and collects up to 15.43" (392mm) of precipitation.Snowfall
Months with snowfall in Plymouth are January through May, September through December. September is the first month it typically snows in Plymouth. Throughout September, in the average 0.1 snowfall days, it receives 0.39" (10mm) of snow. Throughout the year, in Plymouth, there are 61.2 snowfall days, and 42.91" (1090mm) of snow is accumulated.Daylight
In Plymouth, Utah, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:55 am and sunset at 8:01 pm. On the last day of September, in Plymouth, sunrise is at 7:25 am and sunset at 7:11 pm MDT.
Sunshine
In September, the average sunshine is 9.9h.UV index
The average daily maximum UV index in September in Plymouth is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 4 during September leads to these advisories:
Guard yourself - Precautionary measures against sun damage are advocated. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Plymouth, UT
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (30.9°F).
- Average low temperature in September: 51.3°F
The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).
Average pressure in September
Plymouth, 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 (29.88"Hg).
Average wind speed in September
Plymouth, UT
- Average wind speed in September: 5.6mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in September
Plymouth, UT
- Average humidity in September: 41%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (34%).
Average rainfall in September
Plymouth, UT
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is February (2.05").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in September
Plymouth, UT
- Average rainfall days in September: 8.3 days
The month with the highest number of rainy days is April (15.1 days).
The month with the least rainy days is July (5.5 days).
Average snowfall in September
Plymouth, UT
- Average snowfall in September: 0.39"
The month with the highest snowfall is January (13.03").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Plymouth, UT
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (14.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Plymouth, 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: 9h and 54min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Plymouth, UT
- Average sunshine days in September: 19 days
The month with the most sunshine days is July (21.6 days).
The month with the least sunshine days is February (10.1 days).
Average UV index in September
Plymouth, UT
- 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 January (UV index 1).
Average cloud cover in September
Plymouth, UT
- Average cloud cover in September: 14
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in September
Plymouth, UT
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
