Harbor Weather in December
Average highs run from 55°F on December 1 to 53°F on December 31, and lows from 44°F to 43°F. Normal precipitation for the month is 14.10 in.
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
- 53°F
- Average low
- 43°F
- Precipitation
- 14.10 in
- Record high
- 72°FDec 12, 2017
- Record low
- 24°FDec 8, 2009
- Chance of a freeze
- 26%
- Daylight
- 9 h 20 min to 9 h 10 min
- Cloud cover
- 74%
- Humidity
- 84%
- Dew point
- 44°F
- Wind
- 11.4 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 | 55°F | 44°F | 65°F 2008 | 30°F 2007 | |
| Dec 2 | 54°F | 44°F | 63°F 2014 | 34°F 2007 | |
| Dec 3 | 54°F | 43°F | 63°F 2004 | 35°F 2009 | |
| Dec 4 | 54°F | 43°F | 62°F 2019 | 35°F 2005 | |
| Dec 5 | 54°F | 43°F | 60°F 2002 | 32°F 2013 | |
| Dec 6 | 54°F | 43°F | 65°F 2014 | 29°F 2009 | |
| Dec 7 | 54°F | 43°F | 65°F 2017 | 29°F 2009 | |
| Dec 8 | 53°F | 43°F | 66°F 2014 | 24°F 2009 | |
| Dec 9 | 53°F | 43°F | 70°F 2017 | 25°F 2009 | |
| Dec 10 | 53°F | 43°F | 63°F 2014 | 26°F 2009 | |
| Dec 11 | 53°F | 43°F | 63°F 2014 | 31°F 2009 | |
| Dec 12 | 53°F | 43°F | 72°F 2017 | 35°F 2007 | |
| Dec 13 | 53°F | 43°F | 62°F 2004 | 34°F 2007 | |
| Dec 14 | 53°F | 43°F | 58°F 2017 | 34°F 2007 | |
| Dec 15 | 53°F | 42°F | 59°F 2017 | 31°F 2005 | |
| Dec 16 | 53°F | 42°F | 59°F 2017 | 30°F 2008 | |
| Dec 17 | 53°F | 42°F | 58°F 2013 | 30°F 2008 | |
| Dec 18 | 53°F | 42°F | 57°F 2009 | 32°F 2006 | |
| Dec 19 | 53°F | 42°F | 65°F 2003 | 33°F 2006 | |
| Dec 20 | 53°F | 42°F | 64°F 2005 | 33°F 2006 | |
| Dec 21 | 53°F | 42°F | 64°F 2005 | 32°F 2006 | |
| Dec 22 | 53°F | 42°F | 66°F 2016 | 34°F 2006 | |
| Dec 23 | 52°F | 42°F | 63°F 2013 | 32°F 2009 | |
| Dec 24 | 52°F | 43°F | 60°F 2004 | 32°F 2009 | |
| Dec 25 | 53°F | 43°F | 68°F 2004 | 32°F 2007 | |
| Dec 26 | 53°F | 43°F | 61°F 2004 | 32°F 2003 | |
| Dec 27 | 53°F | 43°F | 58°F 2013 | 32°F 2006 | |
| Dec 28 | 53°F | 43°F | 59°F 2005 | 33°F 2006 | |
| Dec 29 | 53°F | 43°F | 68°F 2013 | 34°F 2006 | |
| Dec 30 | 53°F | 43°F | 63°F 2013 | 34°F 2008 | |
| Dec 31 | 53°F | 43°F | 63°F 2013 | 31°F 2007 |
Chance of rain
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:26 AM, sunset 4:46 PM
- December 31
- sunrise 7:45 AM, sunset 4:55 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00351058 (Brookings), public domain. Records: NOAA GHCN-Daily, station USC00351058, 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.