Las Vegas Weather in September
Average highs run from 83°F on September 1 to 74°F on September 30, and lows from 47°F to 36°F. Normal precipitation for the month is 2.43 in over about 6 wet days.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 79°F
- Average low
- 42°F
- Precipitation
- 2.43 in
- Record high
- 95°FSep 6, 2020
- Record low
- 23°FSep 26, 1970
- Chance of a freeze
- 51%
- Days of 90°F or more
- 1.0
- Daylight
- 12 h 55 min to 11 h 51 min
- Cloud cover
- 39%
- Humidity
- 50%
- Dew point
- 43°F
- Wind
- 8.9 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Sep 1 | 83°F | 47°F | 89°F 1948 | 42°F 2004 | 25% | 0% |
| Sep 2 | 82°F | 47°F | 90°F 1947 | 41°F 1976 | 25% | 0% |
| Sep 3 | 82°F | 47°F | 91°F 2019 | 36°F 1961 | 24% | 0% |
| Sep 4 | 82°F | 47°F | 90°F 1945 | 35°F 1961 | 24% | 0% |
| Sep 5 | 82°F | 46°F | 94°F 1945 | 37°F 1971 | 23% | 0% |
| Sep 6 | 82°F | 46°F | 95°F 2020 | 38°F 1943 | 23% | 0% |
| Sep 7 | 81°F | 46°F | 92°F 2020 | 40°F 1970 | 23% | 0% |
| Sep 8 | 81°F | 45°F | 89°F 1992 | 30°F 2020 | 22% | 0% |
| Sep 9 | 81°F | 45°F | 90°F 2021 | 28°F 2020 | 22% | 0% |
| Sep 10 | 80°F | 45°F | 92°F 2021 | 32°F 2020 | 22% | 0% |
| Sep 11 | 80°F | 44°F | 91°F 2021 | 32°F 2020 | 21% | 0% |
| Sep 12 | 80°F | 44°F | 88°F 1956 | 38°F 1957 | 21% | 0% |
| Sep 13 | 80°F | 43°F | 89°F 1956 | 35°F 1945 | 20% | 0% |
| Sep 14 | 79°F | 43°F | 90°F 1956 | 36°F 1993 | 20% | 0% |
| Sep 15 | 79°F | 43°F | 90°F 1956 | 33°F 2012 | 20% | 0% |
| Sep 16 | 79°F | 42°F | 90°F 1956 | 30°F 1951 | 19% | 0% |
| Sep 17 | 78°F | 42°F | 89°F 2000 | 30°F 1968 | 19% | 0% |
| Sep 18 | 78°F | 41°F | 90°F 2000 | 27°F 1971 | 19% | 0% |
| Sep 19 | 78°F | 41°F | 86°F 1954 | 28°F 1971 | 18% | 0% |
| Sep 20 | 77°F | 40°F | 89°F 1956 | 32°F 1971 | 18% | 0% |
| Sep 21 | 77°F | 40°F | 85°F 2005 | 29°F 1965 | 17% | 0% |
| Sep 22 | 77°F | 40°F | 85°F 1944 | 29°F 1995 | 17% | 0% |
| Sep 23 | 76°F | 39°F | 85°F 1947 | 31°F 1970 | 17% | 0% |
| Sep 24 | 76°F | 39°F | 85°F 1956 | 32°F 2006 | 16% | 0% |
| Sep 25 | 76°F | 38°F | 89°F 2020 | 28°F 1970 | 16% | 0% |
| Sep 26 | 75°F | 38°F | 89°F 2020 | 23°F 1970 | 16% | 0% |
| Sep 27 | 75°F | 37°F | 86°F 2001 | 30°F 1970 | 15% | 0% |
| Sep 28 | 75°F | 37°F | 87°F 2015 | 30°F 1974 | 15% | 0% |
| Sep 29 | 74°F | 36°F | 87°F 2010 | 28°F 1999 | 15% | 0% |
| Sep 30 | 74°F | 36°F | 85°F 2024 | 28°F 1945 | 15% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- September 1
- sunrise 6:33 AM, sunset 7:28 PM
- September 30
- sunrise 6:55 AM, sunset 6:46 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00294862 (Las Vegas Wwtp), public domain. Records: NOAA GHCN-Daily, station USW00023054, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.