December weather in Dover, NH
The average temperature in Dover in December is 29.7°F (21.6°F–37.8°F). Average precipitation: 4.47 inches.
December is a winter month in Dover, and is cooler than the annual average of 47.1°F. Daily temperatures swing about 16.2°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 8h 49m. For travel, December is cold.
Avg High
37.8°F
Avg Low
21.6°F
Precipitation
4.47 in
Daylight
8h 49m
December records in Dover
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 65.3°F (2006) | 14.0°F (2007) | 1.19 in (2006) |
| December 2 | 50.4°F (2010) | 12.9°F (2007) | 0.88 in (2018) |
| December 3 | 66.9°F (2009) | 12.6°F (2002) | 1.03 in (2009) |
| December 4 | 52.5°F (2020) | 10.8°F (2025) | 0.16 in (2023) |
| December 5 | 57.6°F (2012) | -0.9°F (2025) | 2.26 in (2020) |
| December 6 | 62.4°F (2011) | 11.1°F (2002) | 0.90 in (2014) |
| December 7 | 56.8°F (2015) | 4.1°F (2002) | 1.24 in (2011) |
| December 8 | 48.9°F (2004) | 1.2°F (2019) | 0.83 in (2011) |
| December 9 | 52.2°F (2019) | 1.0°F (2025) | 1.53 in (2014) |
| December 10 | 60.3°F (2023) | 5.4°F (2002) | 0.71 in (2008) |
| December 11 | 61.0°F (2024) | 7.7°F (2016) | 1.74 in (2024) |
| December 12 | 56.1°F (2024) | 7.5°F (2013) | 1.79 in (2010) |
| December 13 | 52.7°F (2010) | 6.6°F (2005) | 0.67 in (2009) |
| December 14 | 55.0°F (2006) | -2.2°F (2005) | 2.81 in (2019) |
| December 15 | 60.4°F (2008) | -5.1°F (2005) | 0.96 in (2013) |
| December 16 | 56.7°F (2008) | -1.8°F (2016) | 1.76 in (2022) |
| December 17 | 57.2°F (2024) | -6.0°F (2013) | 1.17 in (2020) |
| December 18 | 59.4°F (2023) | 4.3°F (2009) | 2.63 in (2023) |
| December 19 | 56.3°F (2025) | 3.7°F (2020) | 0.56 in (2008) |
| December 20 | 54.0°F (2002) | -0.2°F (2004) | 0.98 in (2002) |
| December 21 | 57.2°F (2018) | -2.0°F (2004) | 1.15 in (2008) |
| December 22 | 54.0°F (2018) | 7.3°F (2024) | 0.65 in (2015) |
| December 23 | 56.8°F (2004) | 1.4°F (2024) | 1.94 in (2022) |
| December 24 | 52.0°F (2007) | 10.8°F (2022) | 0.51 in (2014) |
| December 25 | 61.5°F (2015) | 8.1°F (2013) | 1.14 in (2020) |
| December 26 | 53.2°F (2023) | 5.5°F (2025) | 1.13 in (2005) |
| December 27 | 52.5°F (2016) | 1.6°F (2017) | 1.93 in (2012) |
| December 28 | 57.6°F (2008) | -3.1°F (2017) | 0.85 in (2023) |
| December 29 | 57.0°F (2003) | -13.0°F (2017) | 2.14 in (2025) |
| December 30 | 56.7°F (2022) | -8.3°F (2017) | 1.79 in (2019) |
| December 31 | 53.6°F (2022) | -5.4°F (2017) | 0.67 in (2007) |