September weather forecastRiverside, UT
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Riverside, Utah, with an average temperature fluctuating between 51.3°F (10.7°C) and 74.3°F (23.5°C).Temperature
As August shifts into September, a slight alteration in temperatures is observed, with average highs reducing from a moderately hot 84.9°F (29.4°C) to a still warm 74.3°F (23.5°C). Riverside registers a marked temperature plunge to a cool 51.3°F (10.7°C) during the cool September nights.Humidity
In September, the average relative humidity in Riverside is 41%.Rainfall
In Riverside, in September, it is raining for 8.3 days, with typically 0.91" (23mm) of accumulated precipitation. In Riverside, during the entire year, the rain falls for 120 days and collects up to 15.43" (392mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows in Riverside. Throughout September, in the average 0.1 snowfall days, it receives 0.39" (10mm) of snow. Throughout the year, there are 61.2 snowfall days, and 42.91" (1090mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September in Riverside, sunrise is at 6:55 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 7:11 pm MDT.
Sunshine
In Riverside, Utah, the average sunshine in September is 9.9h.UV index
In September, the average daily maximum UV index in Riverside is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 4 in September translates into this advice:
Put precautions into practice - Protective measures against sun-induced damage are advised. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. 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
Riverside, 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
Riverside, 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
Riverside, 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
Riverside, 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
Riverside, 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
Riverside, 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
Riverside, 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
Riverside, 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
Riverside, 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
Riverside, 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
Riverside, 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
Riverside, 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
Riverside, 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).
