September weather forecastSunnyside, UT
September
Weather in September
September, the first month of the autumn in Sunnyside, is also a moderately hot month, with an average temperature ranging between min 53.1°F (11.7°C) and max 73.4°F (23°C).Temperature
With the commencement of September, Sunnyside records a moderate temperature decline, with the average high easing from August's warm 81.1°F (27.3°C) to a still moderately hot 73.4°F (23°C). Throughout the nights in September, an average low-temperature of 53.1°F (11.7°C) is noted.Humidity
In Sunnyside, the average relative humidity in September is 37%.Rainfall
In Sunnyside, in September, during 7.4 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. Throughout the year, there are 79.6 rainfall days, and 8.7" (221mm) of precipitation is accumulated.Snowfall
In Sunnyside, Utah, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:50 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:05 pm MDT.
Sunshine
In Sunnyside, the average sunshine in September is 10.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Exercise prevention - Precautions against solar damage are endorsed. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sunnyside, UT
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (32°F).
- Average low temperature in September: 53.1°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).
Average pressure in September
Sunnyside, UT
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Sunnyside, UT
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest month (with the lowest average wind speed) is January (4.5mph).
Average humidity in September
Sunnyside, UT
- Average humidity in September: 37%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is June (29%).
Average rainfall in September
Sunnyside, UT
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in September
Sunnyside, UT
- Average rainfall days in September: 7.4 days
The month with the highest number of rainy days is July (12.8 days).
The month with the least rainy days is January (2.4 days).
Average snowfall in September
Sunnyside, UT
- Average snowfall in September: 0"
The month with the highest snowfall is March (5.35").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Sunnyside, UT
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are February and December (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sunnyside, UT
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 10h and 36min
The months with the most sunshine are June and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).
Average sunshine days in September
Sunnyside, UT
- Average sunshine days in September: 18.1 days
The month with the most sunshine days is January (24.4 days).
The month with the least sunshine days is July (11.1 days).
Average UV index in September
Sunnyside, UT
- Average UV index in September: 4
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
Sunnyside, UT
- Average cloud cover in September: 11
The month with the most cloud cover is January (Cloud cover 32).
The month with the least cloud cover is September (Cloud cover 11).
Average visibility in September
Sunnyside, UT
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
