December weather in Merced, CA
The average temperature in Merced in December is 45.5°F (36.2°F–54.7°F). Average precipitation: 1.98 inches.
December is a winter month in Merced, and is cooler than the annual average of 61.6°F. Daily temperatures swing about 18.5°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 9h 26m. For travel, December is cool.
Avg High
54.7°F
Avg Low
36.2°F
Precipitation
1.98 in
Daylight
9h 26m
December records in Merced
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 71.1°F (2021) | 8.1°F (1999) | 1.10 in (2019) |
| December 2 | 71.1°F (1959) | 23.0°F (1906) | 1.00 in (1961) |
| December 3 | 72.0°F (1979) | 26.1°F (1991) | 1.56 in (1974) |
| December 4 | 73.0°F (1983) | 26.1°F (2004) | 2.09 in (1915) |
| December 5 | 71.1°F (1995) | 19.9°F (1903) | 1.68 in (1957) |
| December 6 | 75.0°F (1908) | 19.9°F (1903) | 0.91 in (1966) |
| December 7 | 75.9°F (1912) | 18.0°F (1903) | 0.78 in (1952) |
| December 8 | 75.0°F (2005) | 17.1°F (1903) | 1.00 in (1909) |
| December 9 | 73.0°F (2006) | 16.0°F (1903) | 0.60 in (1996) |
| December 10 | 73.9°F (1908) | 17.1°F (1903) | 0.94 in (1937) |
| December 11 | 73.0°F (1908) | 19.9°F (1903) | 1.00 in (1906) |
| December 12 | 72.0°F (1908) | 17.1°F (1932) | 1.67 in (2014) |
| December 13 | 75.0°F (1908) | 19.0°F (1940) | 1.35 in (2021) |
| December 14 | 72.0°F (1912) | 17.1°F (1940) | 0.85 in (1934) |
| December 15 | 70.0°F (1958) | 18.0°F (1940) | 0.94 in (1936) |
| December 16 | 70.0°F (1958) | 25.0°F (1901) | 1.85 in (1962) |
| December 17 | 69.1°F (1958) | 23.0°F (1975) | 1.10 in (1977) |
| December 18 | 68.0°F (1909) | 23.0°F (1975) | 0.69 in (1925) |
| December 19 | 70.0°F (1981) | 21.0°F (2006) | 0.74 in (1949) |
| December 20 | 70.0°F (1969) | 23.0°F (1930) | 1.16 in (1921) |
| December 21 | 68.0°F (1919) | 21.9°F (1998) | 1.02 in (1982) |
| December 22 | 68.0°F (1909) | 16.0°F (1990) | 1.38 in (1982) |
| December 23 | 69.1°F (1964) | 16.0°F (1990) | 2.10 in (1955) |
| December 24 | 66.9°F (1964) | 15.1°F (1990) | 1.32 in (1921) |
| December 25 | 68.0°F (1909) | 19.0°F (1990) | 1.18 in (1931) |
| December 26 | 68.0°F (1909) | 18.0°F (1956) | 0.72 in (2005) |
| December 27 | 66.9°F (1921) | 21.0°F (1930) | 1.39 in (1973) |
| December 28 | 66.0°F (1991) | 19.9°F (1930) | 0.80 in (1951) |
| December 29 | 68.0°F (1909) | 19.0°F (1990) | 0.98 in (2010) |
| December 30 | 68.0°F (1912) | 19.9°F (1969) | 0.85 in (1904) |
| December 31 | 68.0°F (1909) | 21.0°F (1915) | 0.70 in (1952) |