Salt Lake City
Utah, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Salt Lake City, UT

A stunning autumn panorama of the Salt Lake City landscape in Utah
A stunning autumn panorama of the Salt Lake City landscape in Utah
September, the first month of the autumn, in Salt Lake City, is still a warm month, with average temperature ranging between max 79.2°F (26.2°C) and min 53.1°F (11.7°C).

Temperature

In Salt Lake City, the average high-temperature in September decreases, from a hot 90.5°F (32.5°C) in August, to a warm 79.2°F (26.2°C). The average low-temperature, in September, is 53.1°F (11.7°C).

Humidity

In Salt Lake City, the average relative humidity is 45.6%.

Rainfall

In Salt Lake City, it is raining for 5.8 days, with typically 1.2" (30.7mm) of accumulated precipitation. Throughout the year, there are 95.6 rainfall days, and 16.1" (408.9mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In Salt Lake City, the average length of the day is 12.4h.

Sunshine

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

UV index

In Salt Lake City, the average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Salt Lake City?

In September, in Salt Lake City, Utah, the average high-temperature is 79.2°F (26.2°C), and the average low-temperature is 53.1°F (11.7°C).

What is the average humidity in September in Salt Lake City?

In Salt Lake City, the average relative humidity in September is 45.6%.

How much does it rain in Salt Lake City in September?

In Salt Lake City, Utah, in September, it is raining for 5.8 days, with typically 1.2" (30.7mm) of accumulated precipitation.

Does it snow in Salt Lake City in September?

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

When it does not snow in Salt Lake City?

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

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

In Salt Lake City, the average length of the day in September is 12.4h.

How many hours of sunshine does Salt Lake City have in September?

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

What is the UV index reading in September in Salt Lake City?

The average daily maximum UV index in September in Salt Lake City is 7. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.
Average temperature in September - Salt Lake City, UT
  • Average high temperature in September: 26.2°C

The warmest month (with the highest average high temperature) is July (33.7°C).
The month with the lowest average high temperature is January (3°C).

  • Average low temperature in September: 11.7°C

The month with the highest average low temperature is July (18.2°C).
The coldest month (with the lowest average low temperature) is January (-5.8°C).

Average humidity in September - Salt Lake City, UT
  • Average humidity in September: 45.6%

The month with the highest relative humidity is December (74.3%).
The month with the lowest relative humidity is July (35.9%).

Average rainfall in September - Salt Lake City, UT
  • Average rainfall in September: 30.7mm

The wettest month (with the highest rainfall) is April (50.5mm).
The driest month (with the lowest rainfall) is July (15.5mm).

Average rainfall days in September - Salt Lake City, UT
  • Average rainfall days in September: 5.8 days

The month with the highest number of rainy days is January (10.1 days).
The month with the lowest number of rainy days is July (4.4 days).

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

The month with the highest snowfall is December (335.3mm).
Months with the lowest snowfall are June, July, August and September (0mm).

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

The month with the highest number of snowfall days is January (8.5 days).
Months with the lowest number of 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: 12.4h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 10h

The month with most sunshine is July (Average sunshine: 12.3h).
The month with least sunshine is December (Average sunshine: 3.6h).

Average UV index in September - Salt Lake City, UT
  • Average UV index in September: 7

Months with the highest UV index are June and July (UV index 10).
Months with the lowest UV index are January, November and December (UV index 2).