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, USA, on a sunny day
A stunning autumn panorama of the Salt Lake City landscape in Utah, USA, on a sunny day
  • 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).

  • 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).

  • 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: 1.2"

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

  • 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: 0"

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

  • 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: 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: 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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