Clark County Weather in September
Average highs run from 101°F on September 1 to 91°F on September 30, and lows from 74°F to 64°F. Normal precipitation for the month is 0.34 in over about 2 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
- 97°F
- Average low
- 70°F
- Precipitation
- 0.34 in
- Record high
- 114°FSep 6, 1955
- Record low
- 39°FSep 25, 1959
- Chance of a freeze
- 0%
- Days of 90°F or more
- 25.6
- Daylight
- 12 h 56 min to 11 h 50 min
- Cloud cover
- 22%
- Humidity
- 24%
- Dew point
- 38°F
- Wind
- 7.6 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 101°F | 74°F | 113°F 1958 | 49°F 1957 | 5% |
| Sep 2 | 101°F | 74°F | 110°F 1955 | 51°F 1951 | 5% |
| Sep 3 | 101°F | 74°F | 112°F 1955 | 49°F 1951 | 5% |
| Sep 4 | 101°F | 74°F | 112°F 1955 | 47°F 1951 | 5% |
| Sep 5 | 100°F | 73°F | 113°F 1955 | 52°F 1951 | 5% |
| Sep 6 | 100°F | 73°F | 114°F 1955 | 53°F 1951 | 5% |
| Sep 7 | 100°F | 73°F | 112°F 1955 | 50°F 1951 | 5% |
| Sep 8 | 100°F | 72°F | 111°F 1957 | 51°F 1951 | 5% |
| Sep 9 | 99°F | 72°F | 107°F 1955 | 51°F 1959 | 5% |
| Sep 10 | 99°F | 72°F | 108°F 1955 | 47°F 1951 | 5% |
| Sep 11 | 99°F | 71°F | 108°F 1955 | 50°F 1952 | 5% |
| Sep 12 | 98°F | 71°F | 110°F 1960 | 48°F 1952 | 5% |
| Sep 13 | 98°F | 71°F | 108°F 1953 | 43°F 1951 | 5% |
| Sep 14 | 98°F | 70°F | 106°F 1953 | 42°F 1952 | 5% |
| Sep 15 | 97°F | 70°F | 108°F 1951 | 41°F 1952 | 5% |
| Sep 16 | 97°F | 70°F | 107°F 1956 | 48°F 1957 | 5% |
| Sep 17 | 97°F | 69°F | 107°F 1956 | 49°F 1958 | 5% |
| Sep 18 | 96°F | 69°F | 108°F 1951 | 47°F 1954 | 5% |
| Sep 19 | 96°F | 68°F | 107°F 1951 | 48°F 1954 | 5% |
| Sep 20 | 95°F | 68°F | 107°F 1951 | 44°F 1954 | 4% |
| Sep 21 | 95°F | 68°F | 104°F 1958 | 42°F 1955 | 4% |
| Sep 22 | 95°F | 67°F | 103°F 1958 | 43°F 1955 | 4% |
| Sep 23 | 94°F | 67°F | 102°F 1951 | 41°F 1953 | 4% |
| Sep 24 | 94°F | 66°F | 104°F 2002 | 44°F 1953 | 4% |
| Sep 25 | 93°F | 66°F | 102°F 1951 | 39°F 1959 | 4% |
| Sep 26 | 93°F | 66°F | 104°F 1960 | 42°F 1953 | 4% |
| Sep 27 | 93°F | 65°F | 104°F 1960 | 43°F 1955 | 4% |
| Sep 28 | 92°F | 65°F | 104°F 2010 | 44°F 1953 | 4% |
| Sep 29 | 92°F | 64°F | 104°F 2010 | 43°F 1955 | 4% |
| Sep 30 | 91°F | 64°F | 103°F 2015 | 39°F 1955 | 4% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:12 AM, sunset 7:08 PM
- September 30
- sunrise 6:35 AM, sunset 6:25 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00265705 (N Las Vegas), public domain. Records: NOAA GHCN-Daily, station USC00265705, 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.