December weather in Waltham, MA
The average temperature in Waltham in December is 33.0°F (24.0°F–42.0°F). Average precipitation: 3.76 inches.
December is a winter month in Waltham, and is cooler than the annual average of 50.5°F. Daily temperatures swing about 18°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 8h 54m. For travel, December is cold.
Avg High
42.0°F
Avg Low
24.0°F
Precipitation
3.76 in
Daylight
8h 54m
December records in Waltham
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 70.0°F (2001) | 12.9°F (1965) | 0.63 in (2006) |
| December 2 | 62.1°F (1998) | 7.0°F (1967) | 0.84 in (2025) |
| December 3 | 69.1°F (2009) | 10.9°F (2000) | 0.96 in (2009) |
| December 4 | 69.1°F (1998) | 8.1°F (1966) | 1.89 in (1968) |
| December 5 | 70.0°F (2020) | 6.1°F (2025) | 1.85 in (2020) |
| December 6 | 72.0°F (2001) | 8.1°F (2002) | 1.67 in (1962) |
| December 7 | 75.9°F (1998) | 0.0°F (1964) | 1.33 in (1959) |
| December 8 | 62.1°F (1951) | -7.1°F (1964) | 1.35 in (1950) |
| December 9 | 86.0°F (2009) | 1.9°F (2003) | 2.68 in (2014) |
| December 10 | 62.1°F (2008) | -6.0°F (1949) | 1.40 in (1957) |
| December 11 | 64.9°F (2021) | -2.0°F (1958) | 2.20 in (2024) |
| December 12 | 62.1°F (2021) | 3.9°F (1958) | 2.42 in (1960) |
| December 13 | 61.0°F (2020) | 5.0°F (1958) | 0.97 in (1965) |
| December 14 | 61.0°F (2019) | -8.0°F (2005) | 2.19 in (2002) |
| December 15 | 63.0°F (2008) | -8.0°F (2005) | 0.79 in (2003) |
| December 16 | 61.0°F (2008) | 0.1°F (2016) | 2.00 in (2022) |
| December 17 | 63.0°F (2000) | -6.9°F (2013) | 2.29 in (1970) |
| December 18 | 64.0°F (2023) | -0.8°F (2007) | 2.94 in (2023) |
| December 19 | 60.1°F (2025) | 1.2°F (2020) | 0.59 in (2025) |
| December 20 | 63.0°F (1957) | -2.9°F (1951) | 1.47 in (2002) |
| December 21 | 66.9°F (2018) | -5.1°F (1955) | 1.06 in (1957) |
| December 22 | 60.1°F (1949) | -0.9°F (1955) | 0.88 in (1969) |
| December 23 | 62.1°F (1949) | -4.0°F (1955) | 1.70 in (2022) |
| December 24 | 70.0°F (2015) | 3.0°F (1960) | 1.53 in (1961) |
| December 25 | 64.0°F (2015) | -2.0°F (1968) | 1.98 in (2020) |
| December 26 | 61.0°F (1964) | -7.1°F (1968) | 1.93 in (1969) |
| December 27 | 59.0°F (1949) | -7.1°F (1950) | 1.78 in (2012) |
| December 28 | 61.0°F (2008) | -6.0°F (1951) | 1.91 in (1968) |
| December 29 | 57.0°F (2003) | -8.9°F (2017) | 1.36 in (1967) |
| December 30 | 66.0°F (2022) | -5.1°F (1962) | 1.51 in (2019) |
| December 31 | 63.0°F (1965) | -15.0°F (1963) | 0.56 in (1968) |