Langley Weather in December
Average highs run from 6°C on December 1 to 4°C on December 31, and lows from 0°C to -1°C. Normal precipitation for the month is 186 mm over about 22 wet days.
December day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
December at a glance
- Average high
- 5°C
- Average low
- 0°C
- Precipitation
- 186 mm
- Reanalysis high
- 14°CDec 10, 2014
- Reanalysis low
- -18°CDec 20, 2008
- Daylight
- 8 h 31 min to 8 h 18 min
- Cloud cover
- 77%
- Humidity
- 91%
- Dew point
- 0°C
- Wind
- 9.4 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Reanalysis high | Reanalysis low | Chance wet |
|---|---|---|---|---|---|
| Dec 1 | 6°C | 0°C | 12°C 2008 | -7°C 2014 | 68% |
| Dec 2 | 5°C | 0°C | 10°C 2002 | -7°C 2006 | 68% |
| Dec 3 | 5°C | 0°C | 12°C 2007 | -12°C 1994 | 67% |
| Dec 4 | 5°C | 0°C | 11°C 2007 | -13°C 1994 | 67% |
| Dec 5 | 5°C | 0°C | 12°C 2002 | -9°C 2013 | 67% |
| Dec 6 | 5°C | 0°C | 10°C 2000 | -11°C 2013 | 67% |
| Dec 7 | 5°C | 0°C | 9°C 2020 | -14°C 2013 | 67% |
| Dec 8 | 5°C | 0°C | 12°C 2015 | -12°C 1995 | 67% |
| Dec 9 | 5°C | 0°C | 14°C 2014 | -12°C 1995 | 66% |
| Dec 10 | 5°C | 0°C | 14°C 2014 | -8°C 2009 | 66% |
| Dec 11 | 5°C | 0°C | 10°C 2014 | -8°C 2000 | 68% |
| Dec 12 | 5°C | 0°C | 12°C 2002 | -7°C 1992 | 69% |
| Dec 13 | 5°C | 0°C | 11°C 1998 | -12°C 2016 | 70% |
| Dec 14 | 5°C | 0°C | 13°C 2002 | -13°C 2016 | 72% |
| Dec 15 | 5°C | 0°C | 10°C 1999 | -13°C 2016 | 72% |
| Dec 16 | 5°C | 0°C | 10°C 1997 | -14°C 2008 | 71% |
| Dec 17 | 5°C | 0°C | 9°C 1999 | -11°C 2016 | 71% |
| Dec 18 | 5°C | 0°C | 10°C 2004 | -11°C 1992 | 70% |
| Dec 19 | 4°C | 0°C | 10°C 1994 | -14°C 2008 | 70% |
| Dec 20 | 4°C | -1°C | 12°C 2018 | -18°C 2008 | 71% |
| Dec 21 | 4°C | -1°C | 10°C 2005 | -9°C 1998 | 71% |
| Dec 22 | 4°C | -1°C | 10°C 2005 | -10°C 1998 | 70% |
| Dec 23 | 4°C | -1°C | 9°C 2005 | -13°C 2008 | 70% |
| Dec 24 | 4°C | -1°C | 14°C 2005 | -10°C 2017 | 69% |
| Dec 25 | 4°C | -1°C | 11°C 2005 | -14°C 1996 | 68% |
| Dec 26 | 4°C | -1°C | 9°C 2005 | -14°C 1996 | 67% |
| Dec 27 | 4°C | -1°C | 11°C 1999 | -15°C 1996 | 67% |
| Dec 28 | 4°C | -1°C | 9°C 2011 | -16°C 1996 | 66% |
| Dec 29 | 4°C | -1°C | 9°C 1998 | -13°C 1996 | 66% |
| Dec 30 | 4°C | -1°C | 9°C 1997 | -11°C 1992 | 67% |
| Dec 31 | 4°C | -1°C | 9°C 2019 | -13°C 1992 | 68% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:44 AM, sunset 4:15 PM
- December 31
- sunrise 8:05 AM, sunset 4:23 PM
Other months
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: 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.