Salt Lake City, UT weather in September
Expect warm, mostly dry weather in Salt Lake City in September, with highs near 81°F and lows near 56°F. Rain falls on about 5 days. Good for outdoor plans.
- Normal high
- 81°F
- Normal low
- 56°F
- Wet days
- 5
- 1.1 in total
- Muggy days
- 0
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 87°F | 74°F |
| Normal low | 62°F | 50°F |
| Chance of a wet day | 17% | 19% |
| Sunrise / sunset | 6:54 am / 8:00 pm | 7:23 am / 7:11 pm |
| Daylight | 13.1 h | 11.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Mountain Time).
A typical September day
- 6 am57°Fdew point 42°F
- 9 am67°Fdew point 42°F
- Noon75°Fdew point 40°F
- 3 pm78°Fdew point 38°F
- 6 pm74°Fdew point 39°F
- 9 pm65°Fdew point 41°F
NOAA hourly normals (local standard time) from Salt Lake City Intl Airport (4 mi away); average wind 9 mph; clear or few clouds in 45% of daytime hours, mostly cloudy or overcast in 30%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F11 of 30
- Hot dayshigh 90°F or more5 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow5 of 30
- Notable rainat least 0.10 in3 of 30
- Freezing nightslow 32°F or below0 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 1.1 in; a dry September brings about 0.3 in and a wet one about 1.7 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How September varies from year to year
- Warmest September, 1991-20202018: average high 85°F
- Coolest September2006: average high 76°F
- Wettest September1991: 2.5 in
- Driest September2018: no measurable precipitation
- Highest reading100°F (September 5, 2020)
- Lowest reading35°F (September 29, 2007)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 92°F | 81°F | 66°F |
| Normal low | 67°F | 56°F | 44°F |
| Wet days | 5 | 5 | 7 |
| Comfortable days | 2 | 11 | 15 |
| Daylight | 13.8 h | 12.5 h | 11.1 h |
Highs change by -11°F from August and -15°F into October.
Nearby alternatives in September
- Warmer: Moab, UT196 mi · high 88°F · 5 wet days
- Cooler: Park City, UT22 mi · high 74°F · 6 wet days
How Salt Lake City ranks in September
- Normal high189th warmest of 378 cities; 5th of 7 in Utah
- Wet days90th driest of 378
- Comfortable days140th most of 342
What to pack for Salt Lake City in September
- Layers – afternoons near 81°F but nights near 56°F
Heating and cooling
September has 59 heating degree days and 163 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Salt Lake City in September?
The normal high is 81°F and the normal low is 56°F. From 1991 to 2020 the hottest September reading was 100°F (most recently on September 5, 2020).
Does it rain a lot in Salt Lake City in September?
About 5 days in September have at least 0.01 in of precipitation, and the normal total is 1.1 in. The wettest September in 1991-2020 was in 1991 (2.6 in); the driest was in 2018, with no measurable precipitation.
Is September a good time to visit Salt Lake City?
September ranks 5th of 12 months on our comfort score for Salt Lake City (63 out of 100). It has about 11 comfortable days and about 5 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates, humidity and wind by hour and cloud cover: Salt Lake City Intl Airport (USW00024127), 4.3 mi WNW of the city center, 4,225 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Salt Lake City International Airport (725720-24127), 3.9 mi W of the city center, 4,227 ft . Hourly observations, 1991-2020.