Mill Bay Weather in December
Average highs run from 5°C on December 1 to 4°C on December 31, and lows from 1°C to 1°C. Normal precipitation for the month is 183 mm over about 22 wet days.
December day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 5°C
- Average low
- 1°C
- Precipitation
- 183 mm
- Record high
- 16°CDec 12, 1996
- Record low
- -13°CDec 22, 2022
- Daylight
- 8 h 35 min to 8 h 21 min
- Cloud cover
- 80%
- Humidity
- 90%
- Dew point
- 2°C
- Wind
- 11.9 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 | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Dec 1 | 5°C | 1°C | 11°C 2021 | -5°C 2022 | 69% |
| Dec 2 | 6°C | 1°C | 9°C 2000 | -5°C 2022 | 68% |
| Dec 3 | 5°C | 1°C | 12°C 2007 | -7°C 1994 | 68% |
| Dec 4 | 5°C | 1°C | 12°C 2007 | -8°C 1994 | 68% |
| Dec 5 | 4°C | 1°C | 11°C 2023 | -6°C 1994 | 67% |
| Dec 6 | 5°C | 1°C | 10°C 2000 | -9°C 2013 | 67% |
| Dec 7 | 5°C | 1°C | 8°C 2015 | -9°C 2013 | 67% |
| Dec 8 | 5°C | 1°C | 12°C 2015 | -7°C 2013 | 68% |
| Dec 9 | 5°C | 1°C | 12°C 2014 | -5°C 1995 | 68% |
| Dec 10 | 6°C | 1°C | 14°C 2004 | -5°C 2007 | 69% |
| Dec 11 | 6°C | 2°C | 11°C 1999 | -5°C 2000 | 71% |
| Dec 12 | 6°C | 1°C | 16°C 1996 | -5°C 2000 | 72% |
| Dec 13 | 6°C | 2°C | 10°C 1998 | -5°C 2000 | 73% |
| Dec 14 | 5°C | 1°C | 11°C 2002 | -5°C 2016 | 73% |
| Dec 15 | 5°C | 2°C | 8°C 2002 | -5°C 2016 | 73% |
| Dec 16 | 5°C | 2°C | 10°C 2001 | -7°C 2016 | 73% |
| Dec 17 | 5°C | 2°C | 9°C 2023 | -7°C 2016 | 73% |
| Dec 18 | 6°C | 1°C | 10°C 2004 | -7°C 2022 | 72% |
| Dec 19 | 5°C | 1°C | 11°C 2004 | -8°C 2022 | 73% |
| Dec 20 | 6°C | 1°C | 11°C 2005 | -10°C 1998 | 74% |
| Dec 21 | 5°C | 1°C | 11°C 2005 | -12°C 2022 | 74% |
| Dec 22 | 5°C | 1°C | 10°C 2005 | -13°C 2022 | 73% |
| Dec 23 | 5°C | 1°C | 9°C 2005 | -7°C 2022 | 72% |
| Dec 24 | 5°C | 1°C | 14°C 2005 | -3°C 2017 | 72% |
| Dec 25 | 5°C | 1°C | 14°C 2005 | -5°C 2021 | 71% |
| Dec 26 | 4°C | 1°C | 10°C 1999 | -11°C 2021 | 70% |
| Dec 27 | 5°C | 1°C | 10°C 2023 | -12°C 2021 | 70% |
| Dec 28 | 5°C | 1°C | 11°C 1997 | -9°C 2021 | 70% |
| Dec 29 | 5°C | 1°C | 11°C 1997 | -9°C 2021 | 70% |
| Dec 30 | 5°C | 1°C | 11°C 1997 | -7°C 2021 | 71% |
| Dec 31 | 4°C | 1°C | 9°C 2019 | -8°C 2021 | 72% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- December 1
- sunrise 8:46 AM, sunset 5:21 PM
- December 31
- sunrise 9:07 AM, sunset 5:28 PM
Other months
Sources
Records: NOAA GHCN-Daily, station CA001014820, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.