December weather in Manassas, VA
The average temperature in Manassas in December is 37.6°F (28.7°F–46.5°F). Average precipitation: inches.
December is a winter month in Manassas, and is cooler than the annual average of 55.5°F. Daily temperatures swing about 17.8°F between overnight low and afternoon high. Daylight averages about 9h 18m. For travel, December is cool.
Avg High
46.5°F
Avg Low
28.7°F
Precipitation
in
Daylight
9h 18m
December records in Manassas
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 72.0°F (2006) | 19.9°F (2013) | 0.75 in (2016) |
| December 2 | 75.9°F (2006) | 21.0°F (2013) | 1.00 in (2025) |
| December 3 | 66.0°F (2021) | 19.9°F (2005) | 0.65 in (2009) |
| December 4 | 73.0°F (2012) | 19.0°F (2005) | 0.22 in (2005) |
| December 5 | 75.0°F (2012) | 19.0°F (2024) | 1.20 in (2020) |
| December 6 | 71.1°F (2013) | 16.0°F (2008) | 0.70 in (2009) |
| December 7 | 69.1°F (2021) | 18.0°F (2005) | 1.30 in (2011) |
| December 8 | 59.0°F (2015) | 19.0°F (2005) | 1.20 in (2011) |
| December 9 | 64.9°F (2024) | 14.0°F (2006) | 1.60 in (2009) |
| December 10 | 53.1°F (2008) | 14.0°F (2006) | 0.50 in (2019) |
| December 11 | 66.0°F (2012) | 17.1°F (2005) | 1.70 in (2023) |
| December 12 | 70.0°F (2015) | 17.1°F (2018) | 1.27 in (2024) |
| December 13 | 75.0°F (2015) | 19.9°F (2011) | 0.05 in (2006) |
| December 14 | 73.9°F (2015) | 15.1°F (2005) | 0.35 in (2019) |
| December 15 | 72.0°F (2015) | 14.0°F (2005) | 0.90 in (2020) |
| December 16 | 69.1°F (2008) | 9.0°F (2016) | 2.63 in (2018) |
| December 17 | 66.9°F (2021) | 12.9°F (2010) | 1.30 in (2020) |
| December 18 | 70.0°F (2006) | 12.9°F (2010) | 1.95 in (2023) |
| December 19 | 75.0°F (2006) | 19.0°F (2007) | 0.10 in (2008) |
| December 20 | 62.1°F (2017) | 10.0°F (2004) | 0.32 in (2008) |
| December 21 | 63.0°F (2018) | 10.0°F (2004) | 0.85 in (2012) |
| December 22 | 73.0°F (2013) | 17.1°F (2005) | 0.15 in (2018) |
| December 23 | 73.0°F (2013) | 12.0°F (2008) | 2.30 in (2022) |
| December 24 | 68.0°F (2015) | 7.0°F (2022) | 0.69 in (2004) |
| December 25 | 72.0°F (2015) | 7.0°F (2022) | 2.00 in (2020) |
| December 26 | 71.1°F (2015) | 12.0°F (2022) | 0.62 in (2005) |
| December 27 | 63.0°F (2021) | 19.0°F (2004) | 1.75 in (2012) |
| December 28 | 72.0°F (2015) | 12.9°F (2017) | 0.57 in (2011) |
| December 29 | 71.1°F (2008) | 10.9°F (2017) | 0.70 in (2024) |
| December 30 | 66.9°F (2024) | 18.0°F (2017) | 0.25 in (2021) |
| December 31 | 68.0°F (2024) | 14.0°F (2017) | 0.30 in (2007) |