September weather forecastCoalville, UT
September
Weather in September
Coalville weather starts cooling down in September, signifying the onset of autumn. A modest decline in temperature is observed this month, providing relief from the intense summer heat. The sun shines a bit less, and rainfall events start to become more frequent. The township experiences slightly increased humidity levels in comparison to the summer months. As autumn begins to take hold, winds maintain their speed, creating comfortable conditions.Temperature
September comes with a drop in the average high-temperature, falling from August's moderately hot 78.8°F (26°C) to a pleasant 69.4°F (20.8°C). Despite high daytime temperatures, the average temperature in Coalville lowers to a frosty 43.5°F (6.4°C) during September nights.Humidity
In Coalville, Utah, the average relative humidity in September is 48%.Rainfall
In Coalville, during September, the rain falls for 7.4 days and regularly aggregates up to 0.67" (17mm) of precipitation. In Coalville, during the entire year, the rain falls for 95 days and collects up to 13.54" (344mm) of precipitation.Snowfall
January through June, September through December are months with snowfall in Coalville. September is the first month it typically snows in Coalville, Utah. Throughout September, in the average 0.2 snowfall days, it receives 0.12" (3mm) of snow. In Coalville, during the entire year, snow falls for 81.1 days and aggregates up to 64.61" (1641mm) of snow.Daylight
In September, the average length of the day is 12h and 27min.On the first day of the month, sunrise is at 6:53 am and sunset at 7:57 pm. On the last day of September, sunrise is at 7:22 am and sunset at 7:08 pm MDT.
Sunshine
In September, the average sunshine is 10.2h.UV index
In September, the average daily maximum UV index in Coalville, Utah, is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The average daily UV index of 4 in September transforms into the following instructions:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The Sun's radiation is especially intense around midday; try to stay in shade during this period. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Notice! The UV radiation of the Sun can be intensified nearly twofold 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
Coalville, UT
- Average high temperature in September: 69.4°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is December (28.8°F).
- Average low temperature in September: 43.5°F
The month with the highest average low temperature is July (50.9°F).
The coldest month (with the lowest average low temperature) is January (11.5°F).
Average pressure in September
Coalville, UT
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Coalville, UT
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is June (6.1mph).
The calmest month (with the lowest average wind speed) is January (4.9mph).
Average humidity in September
Coalville, UT
- Average humidity in September: 48%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are July and August (43%).
Average rainfall in September
Coalville, UT
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in September
Coalville, UT
- Average rainfall days in September: 7.4 days
The month with the highest number of rainy days is May (11.8 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in September
Coalville, UT
- Average snowfall in September: 0.12"
The month with the highest snowfall is February (13.5").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Coalville, UT
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is February (15.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Coalville, UT
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 10h and 12min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in September
Coalville, UT
- Average sunshine days in September: 18 days
The month with the most sunshine days is July (20.5 days).
The month with the least sunshine days is February (10.9 days).
Average UV index in September
Coalville, UT
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Coalville, UT
- Average cloud cover in September: 13
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in September
Coalville, 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, February and December (4mi).
