Royal City Weather in December
Average highs run from 43°F on December 1 to 38°F on December 31, and lows from 28°F to 24°F.
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
- 40°F
- Average low
- 26°F
- Record high
- 68°FDec 1, 2021
- Record low
- -13°FDec 17, 1964
- Chance of a freeze
- 100%
- Daylight
- 8 h 49 min to 8 h 36 min
- Cloud cover
- 73%
- Humidity
- 84%
- Dew point
- 26°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 |
|---|---|---|---|---|---|
| Dec 1 | 43°F | 28°F | 68°F 2021 | 0°F 2022 | |
| Dec 2 | 43°F | 28°F | 60°F 2021 | 4°F 2006 | |
| Dec 3 | 42°F | 28°F | 58°F 2007 | 6°F 2022 | |
| Dec 4 | 42°F | 27°F | 60°F 2007 | 3°F 2005 | |
| Dec 5 | 42°F | 27°F | 51°F 1953 | 4°F 2013 | |
| Dec 6 | 42°F | 27°F | 55°F 2025 | 0°F 1956 | |
| Dec 7 | 41°F | 27°F | 52°F 2025 | 0°F 2013 | |
| Dec 8 | 41°F | 27°F | 61°F 2015 | -5°F 2013 | |
| Dec 9 | 41°F | 27°F | 56°F 2025 | 1°F 2009 | |
| Dec 10 | 40°F | 26°F | 62°F 2025 | -3°F 2009 | |
| Dec 11 | 40°F | 26°F | 62°F 2025 | 0°F 1963 | |
| Dec 12 | 40°F | 26°F | 53°F 1953 | 4°F 2009 | |
| Dec 13 | 40°F | 26°F | 52°F 2025 | 2°F 2009 | |
| Dec 14 | 39°F | 26°F | 50°F 1956 | 1°F 2016 | |
| Dec 15 | 39°F | 26°F | 65°F 2025 | -1°F 1964 | |
| Dec 16 | 39°F | 25°F | 58°F 1999 | -11°F 1964 | |
| Dec 17 | 39°F | 25°F | 56°F 2025 | -13°F 1964 | |
| Dec 18 | 39°F | 25°F | 54°F 1956 | -5°F 2016 | |
| Dec 19 | 39°F | 25°F | 51°F 2020 | 0°F 2008 | |
| Dec 20 | 38°F | 25°F | 57°F 2019 | -4°F 2008 | |
| Dec 21 | 38°F | 25°F | 58°F 2020 | -5°F 2022 | |
| Dec 22 | 38°F | 25°F | 52°F 2014 | -5°F 2022 | |
| Dec 23 | 38°F | 25°F | 47°F 1950 | -2°F 1951 | |
| Dec 24 | 38°F | 25°F | 50°F 1957 | -2°F 1951 | |
| Dec 25 | 38°F | 25°F | 53°F 1957 | -5°F 1964 | |
| Dec 26 | 38°F | 25°F | 48°F 2024 | 2°F 1951 | |
| Dec 27 | 38°F | 25°F | 52°F 1949 | 5°F 2021 | |
| Dec 28 | 38°F | 25°F | 68°F 1998 | 6°F 2021 | |
| Dec 29 | 38°F | 25°F | 66°F 1998 | 6°F 2007 | |
| Dec 30 | 38°F | 24°F | 64°F 1998 | 3°F 2015 | |
| Dec 31 | 38°F | 24°F | 68°F 1998 | -12°F 2021 |
Chance of rain
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:23 AM, sunset 4:12 PM
- December 31
- sunrise 7:44 AM, sunset 4:20 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00457727 (Smyrna), public domain. Records: NOAA GHCN-Daily, station USW00024110, 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.