September weather forecastAltamont, UT
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Altamont, Utah, with an average temperature fluctuating between 68.9°F (20.5°C) and 46.6°F (8.1°C).Temperature
September ushers in a minute temperature change, with average high-temperatures reducing from August's warm 76.6°F (24.8°C) to an agreeable 68.9°F (20.5°C). Against the high September temperatures, Altamont records an average drop to a chilly 46.6°F (8.1°C) at night.Humidity
The average relative humidity in September is 43%.Rainfall
In Altamont, during September, the rain falls for 10.3 days and regularly aggregates up to 0.94" (24mm) of precipitation. Throughout the year, there are 124.1 rainfall days, and 12.87" (327mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:49 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:04 pm MDT.
Sunshine
In September, the average sunshine is 10.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, an average UV index of 4 transforms into the following instructions:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Altamont, UT
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The months with the lowest average high temperature are January and December (28.9°F).
- Average low temperature in September: 46.6°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 (11.7°F).
Average pressure in September
Altamont, UT
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Altamont, UT
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is April (7.7mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in September
Altamont, UT
- Average humidity in September: 43%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is June (36%).
Average rainfall in September
Altamont, UT
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is May (1.65").
The driest month (with the least rainfall) is November (0.71").
Average rainfall days in September
Altamont, UT
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is November (6.2 days).
Average snowfall in September
Altamont, UT
- Average snowfall in September: 0"
The month with the highest snowfall is February (7.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Altamont, UT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Altamont, 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 24min).
- Average sunshine in September: 10h and 30min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 24min).
Average sunshine days in September
Altamont, UT
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is April (12.4 days).
Average UV index in September
Altamont, UT
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Altamont, UT
- Average cloud cover in September: 13
The month with the most cloud cover is February (Cloud cover 33).
The months with the least cloud cover are June and September (Cloud cover 13).
Average visibility in September
Altamont, UT
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
