Summerlin South Weather in December
Average highs run from 55°F on December 1 to 51°F on December 31, and lows from 33°F to 32°F. Normal precipitation for the month is 1.09 in over about 3 wet days.
December day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 52°F
- Average low
- 32°F
- Precipitation
- 1.09 in
- Snowfall
- 0.7 in
- Record high
- 77°FDec 3, 1980
- Record low
- 11°FDec 23, 1990
- Chance of a freeze
- 100%
- Daylight
- 9 h 53 min to 9 h 45 min
- Cloud cover
- 47%
- Humidity
- 49%
- Dew point
- 21°F
- Wind
- 8.1 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 |
|---|---|---|---|---|---|---|
| Dec 1 | 55°F | 33°F | 75°F 2021 | 26°F 1957 | 7% | 0% |
| Dec 2 | 55°F | 33°F | 73°F 1958 | 24°F 1948 | 7% | 0% |
| Dec 3 | 54°F | 32°F | 77°F 1980 | 23°F 1948 | 7% | 0% |
| Dec 4 | 54°F | 32°F | 75°F 1977 | 24°F 1948 | 8% | 1% |
| Dec 5 | 54°F | 32°F | 75°F 1977 | 18°F 1948 | 8% | 1% |
| Dec 6 | 53°F | 32°F | 72°F 1977 | 25°F 1948 | 8% | 1% |
| Dec 7 | 53°F | 32°F | 70°F 2020 | 21°F 1948 | 8% | 1% |
| Dec 8 | 53°F | 32°F | 74°F 1975 | 23°F 1953 | 8% | 1% |
| Dec 9 | 52°F | 32°F | 71°F 1950 | 16°F 1956 | 8% | 1% |
| Dec 10 | 52°F | 31°F | 74°F 1950 | 20°F 1972 | 8% | 1% |
| Dec 11 | 52°F | 31°F | 74°F 2025 | 21°F 1972 | 8% | 1% |
| Dec 12 | 52°F | 31°F | 74°F 1958 | 15°F 1949 | 9% | 1% |
| Dec 13 | 52°F | 31°F | 71°F 2017 | 19°F 1949 | 9% | 1% |
| Dec 14 | 52°F | 31°F | 71°F 1950 | 22°F 1964 | 9% | 1% |
| Dec 15 | 51°F | 31°F | 75°F 1977 | 23°F 1972 | 9% | 1% |
| Dec 16 | 51°F | 31°F | 74°F 1980 | 23°F 1964 | 9% | 1% |
| Dec 17 | 51°F | 31°F | 70°F 1980 | 24°F 1949 | 9% | 1% |
| Dec 18 | 51°F | 31°F | 68°F 2024 | 25°F 1968 | 9% | 1% |
| Dec 19 | 51°F | 31°F | 68°F 2024 | 25°F 1948 | 9% | 1% |
| Dec 20 | 51°F | 31°F | 73°F 1981 | 24°F 1948 | 10% | 1% |
| Dec 21 | 51°F | 31°F | 68°F 1950 | 20°F 1968 | 10% | 1% |
| Dec 22 | 51°F | 31°F | 75°F 2014 | 12°F 1990 | 10% | 1% |
| Dec 23 | 51°F | 31°F | 74°F 1955 | 11°F 1990 | 10% | 1% |
| Dec 24 | 51°F | 31°F | 70°F 2005 | 14°F 1990 | 10% | 1% |
| Dec 25 | 51°F | 31°F | 69°F 1964 | 17°F 1948 | 10% | 1% |
| Dec 26 | 51°F | 31°F | 73°F 1980 | 20°F 1962 | 10% | 1% |
| Dec 27 | 51°F | 31°F | 70°F 1980 | 19°F 1962 | 10% | 1% |
| Dec 28 | 51°F | 31°F | 73°F 1980 | 20°F 1954 | 10% | 1% |
| Dec 29 | 51°F | 31°F | 73°F 1980 | 23°F 1962 | 11% | 1% |
| Dec 30 | 51°F | 32°F | 70°F 1980 | 15°F 1990 | 11% | 1% |
| Dec 31 | 51°F | 32°F | 74°F 1995 | 18°F 1990 | 11% | 1% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 6:34 AM, sunset 4:27 PM
- December 31
- sunrise 6:52 AM, sunset 4:37 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00266691 (Red Rock Canyon - Spg Mt Rch S), public domain. Records: NOAA GHCN-Daily, station USW00023169, 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.