September weather forecastWest Valley City, UT
September
Weather in September
September signals a transition from hot summer days to the cooler conditions of fall in West Valley City. With an average temperature between 52.9°F (11.6°C) and 74.1°F (23.4°C), the weather becomes more comfortable for outdoor activities. This month witnesses a gradual dip in daylight hours alongside a decrease in UV index. Still, with low rainfall amounts and significant sunshine hours, September provides a pleasant blend of summer and autumn weather.Temperature
West Valley City experiences a temperature shift at the start of September, with average high-temperatures adjusting from a warm 83.3°F (28.5°C) in August to a still moderately hot 74.1°F (23.4°C). West Valley City cools down to an average low-temperature of 52.9°F (11.6°C) throughout the month of September.Humidity
The average relative humidity in September is 42%.Rainfall
In September, the rain falls for 7.2 days. Throughout September, 0.79" (20mm) of precipitation is accumulated. In West Valley City, during the entire year, the rain falls for 96.6 days and collects up to 12.13" (308mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day in West Valley City, Utah, is 12h and 27min.On the first day of September in West Valley City, sunrise is at 6:55 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:11 pm MDT.
Sunshine
In West Valley City, the average sunshine in September is 10h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
West Valley City, UT
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in September: 52.9°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in September
West Valley City, UT
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
West Valley City, UT
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is March (6.7mph).
The calmest month (with the lowest average wind speed) is January (5.1mph).
Average humidity in September
West Valley City, UT
- Average humidity in September: 42%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is July (36%).
Average rainfall in September
West Valley City, UT
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is December (1.61").
The driest month (with the least rainfall) is June (0.35").
Average rainfall days in September
West Valley City, UT
- Average rainfall days in September: 7.2 days
The month with the highest number of rainy days is April (12.2 days).
The month with the least rainy days is June (4.6 days).
Average snowfall in September
West Valley City, UT
- Average snowfall in September: 0"
The month with the highest snowfall is January (8.15").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
West Valley City, UT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
West Valley City, UT
- Average daylight in September: 12h and 24min
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 18min).
- Average sunshine in September: 10h and 0min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in September
West Valley City, UT
- Average sunshine days in September: 20.2 days
The month with the most sunshine days is June (23.6 days).
The month with the least sunshine days is February (13.6 days).
Average UV index in September
West Valley City, 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
West Valley City, UT
- Average cloud cover in September: 12
The months with the most cloud cover are January and February (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in September
West Valley City, 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).
