September weather forecast
Salt Lake City, UT

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A stunning autumn panorama of the Salt Lake City landscape in Utah
A stunning autumn panorama of the Salt Lake City landscape in Utah

Weather in September

In September, Salt Lake City, Utah embraces the start of the fall season. The temperatures decline from the August heights, hinting at the swift approach of autumn. As the city walks into October, it further embraces the fall with even cooler temperatures. September's moderate weather makes it an excellent time for hiking and appreciating the fall foliage, particularly in the nearby mountain ranges. With the decrease in daylight hours, the city starts preparing for the shorter days of winter.

Temperature

With September's onset, the average high-temperature recedes from August's moderately hot 82.8°F (28.2°C) to a pleasant 73.2°F (22.9°C). Throughout the month of September, the average temperature dips to a fresh 52.7°F (11.5°C) at night.

Humidity

The average relative humidity in September is 43%.

Rainfall

In September, the rain falls for 5 days. Throughout September, 0.35" (9mm) of precipitation is accumulated. In Salt Lake City, during the entire year, the rain falls for 71.6 days and collects up to 4.21" (107mm) of precipitation.

Snowfall

In Salt Lake City, snow does not fall in May through September.

Daylight

The average length of the day in September is 12h and 27min.
On the first day of the month, sunrise is at 6:55 am and sunset at 7:59 pm. On the last day of September, sunrise is at 7:23 am and sunset at 7:10 pm MDT.

Sunshine

In Salt Lake City, the average sunshine in September is 10h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 4 during September translates into the following directions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.

Frequently asked questions

What are the temperatures in September?

The average high-temperature and low-temperature during September are 73.2°F (22.9°C) and 52.7°F (11.5°C) respectively.

What is the average humidity in September?

The average relative humidity in September is 43%.

How much does it rain in September?

In Salt Lake City, in September, during 5 rainfall days, 0.35" (9mm) of precipitation is typically accumulated.

When it does not snow?

In Salt Lake City, snow does not fall in May through September.

Does it snow in September?

In Salt Lake City, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Salt Lake City?

The average day length in September is 12h and 27min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:55 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.

How long on average sun shines in September?

The average sunshine duration in September is 10h.

What is the UV index reading in September?

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Salt Lake City, UT

Average temperature in September - Salt Lake City, UT
  • Average high temperature in September: 73.2°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (34°F).

  • Average low temperature in September: 52.7°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (21°F).

Average pressure in September
Salt Lake City, UT

Average pressure in September - Salt Lake 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
Salt Lake City, UT

Average wind speed in September - Salt Lake City, UT
  • Average wind speed in September: 5.8mph

The windiest month (with the highest average wind speed) is March (6.6mph).
The calmest month (with the lowest average wind speed) is January (5mph).

Average humidity in September
Salt Lake City, UT

Average humidity in September - Salt Lake City, UT
  • Average humidity in September: 43%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is July (37%).

Average rainfall in September
Salt Lake City, UT

Average rainfall in September - Salt Lake City, UT
  • Average rainfall in September: 0.35"

The wettest month (with the highest rainfall) is March (0.51").
The driest month (with the least rainfall) is August (0.2").

Average rainfall days in September
Salt Lake City, UT

Average rainfall days in September - Salt Lake City, UT
  • Average rainfall days in September: 5 days

The month with the highest number of rainy days is April (8.9 days).
The month with the least rainy days is June (4 days).

Average snowfall in September
Salt Lake City, UT

Average snowfall in September - Salt Lake City, UT
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.68").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
Salt Lake City, UT

Average snowfall days in September - Salt Lake City, UT
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (6.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Salt Lake City, UT

Average daylight in September / Average sunshine in September - Salt Lake City, UT
  • Average daylight in September: 12h and 2min

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 0min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).

Average sunshine days in September
Salt Lake City, UT

Average sunshine days in September - Salt Lake City, UT
  • Average sunshine days in September: 22.4 days

The month with the most sunshine days is June (23.8 days).
The month with the least sunshine days is February (19 days).

Average UV index in September
Salt Lake City, UT

Average UV index in September - Salt Lake 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
Salt Lake City, UT

Average cloud cover in September - Salt Lake City, UT
  • Average cloud cover in September: 12

The months with the most cloud cover are January and February (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 9).

Average visibility in September
Salt Lake City, UT

Average visibility in September - Salt Lake 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).

Salt Lake City, Utah, USA

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