September weather forecastBrigham City, UT
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Brigham City, Utah, with an average temperature fluctuating between 73.9°F (23.3°C) and 50.4°F (10.2°C).Temperature
The arrival of September corresponds with a reduction in the average high-temperature, down from August's 83.7°F (28.7°C) to a still warm 73.9°F (23.3°C). September nights bring a significant cooling from the heat of the day, with averages of 50.4°F (10.2°C).Humidity
The average relative humidity in September is 42%.Rainfall
In Brigham City, during September, the rain falls for 9.2 days and regularly aggregates up to 1.1" (28mm) of precipitation. Throughout the year, there are 92.7 rainfall days, and 15.39" (391mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.4 snowfall days, it receives 0.71" (18mm) of snow. In Brigham City, Utah, during the entire year, snow falls for 79.8 days and aggregates up to 68.94" (1751mm) of snow.Daylight
In Brigham City, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:55 am and sunset at 8:00 pm. On the last day of September, sunrise is at 7:24 am and sunset at 7:10 pm MDT.
Sunshine
The average sunshine in September is 9.8h.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 unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 4 during September translates into the following guidance:
Undertake precautions - Obligation exists to protect against skin and eye damage. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Brigham City, UT
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is December (31.1°F).
- Average low temperature in September: 50.4°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).
Average pressure in September
Brigham City, 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
Brigham City, UT
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest month (with the lowest average wind speed) is January (4.4mph).
Average humidity in September
Brigham City, UT
- Average humidity in September: 42%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (35%).
Average rainfall in September
Brigham City, UT
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is January (1.85").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in September
Brigham City, UT
- Average rainfall days in September: 9.2 days
The month with the highest number of rainy days is May (12.1 days).
The month with the least rainy days is January (3.7 days).
Average snowfall in September
Brigham City, UT
- Average snowfall in September: 0.71"
The month with the highest snowfall is January (15.63").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Brigham City, UT
- Average snowfall days in September: 0.4 days
The month with the highest number of snowfall days is February (16.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Brigham City, 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 12min).
- Average sunshine in September: 9h and 48min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in September
Brigham City, UT
- Average sunshine days in September: 18 days
The month with the most sunshine days is October (20.7 days).
The month with the least sunshine days is February (10.8 days).
Average UV index in September
Brigham City, UT
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Brigham City, UT
- Average cloud cover in September: 15
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 11).
Average visibility in September
Brigham City, 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 months with the lowest visibility are January and February (4mi).
