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

September weather forecast and Climate
Salt Lake City, UT

  • The average high temperature in September: 79.2°F

The warmest month (with the highest average high temperature) is July (92.6°F).
The month with the lowest average high temperature is January (37.4°F).

  • The average low temperature in September: 53°F

The month with the highest average low temperature is July (64.7°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

  • The 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%).

  • The average rainfall in September: 1.2"

Wettest months (with the highest rainfall) are April and May (2").
The driest month (with the lowest rainfall) is July (0.6").

  • The 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).

  • The average snowfall in September: 0"

The month with the highest snowfall is December (13.2").
Months with the lowest snowfall are June, July, August and September (0").

  • The 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).

  • The average daylight in September: 12h

Months with the longest days are June and July (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9h).

  • The 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).

  • The 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).

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