December weather in Plymouth, CA
The average temperature in Plymouth in December is 46.9°F (38.8°F–55.0°F). Average precipitation: 5.40 inches.
December is a winter month in Plymouth, and is cooler than the annual average of 61°F. Daily temperatures swing about 16.2°F between overnight low and afternoon high. Daylight averages about 9h 20m. For travel, December is a wet month.
Avg High
55.0°F
Avg Low
38.8°F
Precipitation
5.40 in
Daylight
9h 20m
December records in Plymouth
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 69.1°F (2008) | 28.9°F (2006) | 1.72 in (2012) |
| December 2 | 69.1°F (2008) | 30.9°F (2006) | 2.24 in (2005) |
| December 3 | 68.0°F (2021) | 30.9°F (1999) | 2.02 in (1950) |
| December 4 | 66.9°F (2020) | 30.9°F (2001) | 2.02 in (2022) |
| December 5 | 68.0°F (2013) | 27.0°F (2013) | 1.34 in (1956) |
| December 6 | 66.0°F (2023) | 30.0°F (1998) | 1.68 in (1955) |
| December 7 | 70.0°F (2000) | 30.0°F (1998) | 1.41 in (1950) |
| December 8 | 70.0°F (2020) | 24.1°F (2009) | 1.72 in (2004) |
| December 9 | 68.0°F (2006) | 25.0°F (2009) | 0.58 in (1955) |
| December 10 | 69.1°F (2020) | 30.9°F (2009) | 2.02 in (1954) |
| December 11 | 64.9°F (2004) | 32.0°F (1999) | 3.12 in (2022) |
| December 12 | 62.1°F (2004) | 34.0°F (2001) | 2.20 in (2014) |
| December 13 | 64.0°F (2019) | 34.0°F (1998) | 2.33 in (2021) |
| December 14 | 64.0°F (2025) | 26.1°F (2013) | 1.52 in (2021) |
| December 15 | 68.0°F (2025) | 28.9°F (2001) | 2.13 in (1977) |
| December 16 | 63.0°F (2013) | 28.0°F (2008) | 2.68 in (1962) |
| December 17 | 68.0°F (2023) | 26.1°F (2008) | 1.32 in (2002) |
| December 18 | 69.1°F (2013) | 23.0°F (2006) | 1.58 in (2005) |
| December 19 | 64.0°F (2003) | 21.9°F (2006) | 2.40 in (1969) |
| December 20 | 66.9°F (2004) | 19.9°F (1998) | 1.24 in (1964) |
| December 21 | 66.0°F (2005) | 23.0°F (1968) | 1.22 in (1969) |
| December 22 | 64.0°F (2019) | 21.0°F (1998) | 2.76 in (1955) |
| December 23 | 64.0°F (2023) | 28.9°F (1998) | 3.90 in (1964) |
| December 24 | 64.0°F (2005) | 27.0°F (2006) | 2.65 in (1955) |
| December 25 | 66.9°F (2005) | 30.9°F (2006) | 2.33 in (1971) |
| December 26 | 66.9°F (2013) | 27.0°F (2008) | 1.72 in (2005) |
| December 27 | 68.0°F (2013) | 26.1°F (2008) | 1.60 in (2022) |
| December 28 | 66.0°F (1999) | 28.9°F (2008) | 1.20 in (1964) |
| December 29 | 62.1°F (1999) | 28.9°F (2016) | 1.90 in (2010) |
| December 30 | 66.9°F (2016) | 26.1°F (2014) | 1.14 in (1965) |
| December 31 | 66.0°F (2013) | 28.9°F (2006) | 2.03 in (2005) |