December weather in Westfield, MA
The average temperature in Westfield in December is 31.0°F (22.1°F–39.8°F). Average precipitation: 3.58 inches.
December is a winter month in Westfield, and is cooler than the annual average of 49.4°F. Daily temperatures swing about 17.7°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 8h 56m. For travel, December is cold.
Avg High
39.8°F
Avg Low
22.1°F
Precipitation
3.58 in
Daylight
8h 56m
December records in Westfield
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 68.0°F (2001) | 16.2°F (2019) | 1.73 in (2010) |
| December 2 | 63.0°F (1998) | 10.9°F (2000) | 0.74 in (2018) |
| December 3 | 66.0°F (2009) | 6.1°F (2000) | 0.95 in (2009) |
| December 4 | 69.1°F (1998) | 0.0°F (1949) | 1.20 in (1950) |
| December 5 | 68.0°F (2001) | 1.9°F (2025) | 1.31 in (2020) |
| December 6 | 68.0°F (2001) | 5.0°F (2002) | 0.71 in (2014) |
| December 7 | 73.0°F (1998) | -0.9°F (2002) | 1.88 in (2011) |
| December 8 | 91.9°F (2001) | -0.8°F (2019) | 1.15 in (1950) |
| December 9 | 54.0°F (2008) | 0.0°F (2025) | 1.59 in (2014) |
| December 10 | 59.0°F (2023) | -7.1°F (1949) | 1.34 in (2023) |
| December 11 | 61.0°F (2021) | 7.2°F (2016) | 1.37 in (2024) |
| December 12 | 62.1°F (2015) | 12.2°F (2013) | 3.34 in (2010) |
| December 13 | 59.0°F (2020) | -2.0°F (2005) | 0.73 in (2007) |
| December 14 | 57.0°F (2006) | -9.9°F (2005) | 1.34 in (2019) |
| December 15 | 60.1°F (2008) | -7.1°F (2005) | 0.40 in (1951) |
| December 16 | 62.1°F (2021) | -9.9°F (1951) | 1.11 in (2005) |
| December 17 | 61.0°F (2000) | -13.0°F (1951) | 1.71 in (2000) |
| December 18 | 63.0°F (2023) | -0.9°F (1951) | 2.21 in (2023) |
| December 19 | 57.9°F (2025) | -1.8°F (2020) | 0.91 in (2025) |
| December 20 | 55.0°F (2002) | -9.0°F (1951) | 0.71 in (1999) |
| December 21 | 63.0°F (2018) | -6.0°F (2004) | 2.76 in (2018) |
| December 22 | 64.0°F (2013) | 1.2°F (2024) | 0.46 in (2022) |
| December 23 | 57.9°F (2004) | -2.7°F (2024) | 1.38 in (2022) |
| December 24 | 69.1°F (2015) | 5.0°F (1948) | 1.01 in (2003) |
| December 25 | 62.1°F (2020) | -2.9°F (1948) | 2.13 in (2020) |
| December 26 | 55.0°F (2015) | -2.9°F (1948) | 0.71 in (2009) |
| December 27 | 57.9°F (1949) | -7.8°F (2017) | 1.35 in (2009) |
| December 28 | 59.0°F (2008) | -11.0°F (1951) | 1.11 in (2023) |
| December 29 | 51.1°F (2003) | -6.9°F (2017) | 1.03 in (2013) |
| December 30 | 61.0°F (2022) | -5.8°F (2017) | 2.05 in (1948) |
| December 31 | 55.9°F (1948) | -6.9°F (2017) | 1.72 in (1948) |