Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The commencement of September indicates a shift in the average high-temperature, receding from August's warm 81.1°F (27.3°C) to an agreeable 71.4°F (21.9°C). During the nights in September, River Heights records a pronounced shift from the daytime warmth, with a consistent average temperature of 47.7°F (8.7°C).Humidity
In September, the average relative humidity is 45%.Rainfall
In River Heights, in September, during 7.8 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. Throughout the year, in River Heights, Utah, there are 122.8 rainfall days, and 16.89" (429mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.31" (8mm) of snow. Throughout the year, in River Heights, there are 77.8 snowfall days, and 58.86" (1495mm) of snow is accumulated.Daylight
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 7:59 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:10 pm MDT.
Sunshine
In September, the average sunshine is 10h.UV index
In River Heights, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 3 in September translates into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. To guard against the harmful effects of the Sun, minimize exposure during midday. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in River Heights?
What is the average humidity in September in River Heights?
How many days does it rain in September in River Heights?
When does it start snowing in River Heights?
What is the average length of the day in September in River Heights?
When are sunrise and sunset in September in River Heights?
How long on average sun shines in September in River Heights?
How high is the UV index in September in River Heights?
Average temperature in September
River Heights, UT
- Average high temperature in September: 71.4°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The months with the lowest average high temperature are January and December (28.8°F).
- Average low temperature in September: 47.7°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 (14°F).
Average pressure in September
River Heights, 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
River Heights, UT
- Average wind speed in September: 5.4mph
The windiest months (with the highest average wind speed) are April and June (5.8mph).
The calmest month (with the lowest average wind speed) is January (4mph).
Average humidity in September
River Heights, UT
- Average humidity in September: 45%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (38%).
Average rainfall in September
River Heights, UT
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is January (2.36").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in September
River Heights, UT
- Average rainfall days in September: 7.8 days
The month with the highest number of rainy days is April (16.1 days).
The month with the least rainy days is August (6 days).
Average snowfall in September
River Heights, UT
- Average snowfall in September: 0.31"
The month with the highest snowfall is January (16.18").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
River Heights, UT
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (17.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
River Heights, UT
- Average daylight in September: 12h and 3min
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 month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in September
River Heights, UT
- Average sunshine days in September: 20.3 days
The month with the most sunshine days is June (21.6 days).
The month with the least sunshine days is February (7.8 days).
Average UV index in September
River Heights, 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, November and December (UV index 1).
Average cloud cover in September
River Heights, UT
- Average cloud cover in September: 14
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in September
River Heights, 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 and February (4mi).
River Heights, Utah, USA
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