December weather in Rosemont, MD
The average temperature in Rosemont in December is 35.1°F (25.3°F–44.8°F). Average precipitation: 3.46 inches.
December is a winter month in Rosemont, and is cooler than the annual average of 52.9°F. Daily temperatures swing about 19.5°F between overnight low and afternoon high. Daylight averages about 9h 14m. For travel, December is cold.
Avg High
44.8°F
Avg Low
25.3°F
Precipitation
3.46 in
Daylight
9h 14m
December records in Rosemont
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 75.0°F (1998) | 15.1°F (1999) | 1.28 in (2010) |
| December 2 | 75.0°F (2006) | 15.1°F (1999) | 0.85 in (2010) |
| December 3 | 69.1°F (1998) | 12.0°F (2000) | 0.74 in (2007) |
| December 4 | 75.0°F (1998) | 10.0°F (2002) | 0.14 in (2005) |
| December 5 | 73.9°F (1998) | 10.0°F (2002) | 0.74 in (2020) |
| December 6 | 80.1°F (2001) | 7.0°F (2007) | 0.73 in (2003) |
| December 7 | 79.0°F (1998) | 3.9°F (2002) | 1.75 in (2013) |
| December 8 | 78.1°F (1998) | 3.9°F (2002) | 0.22 in (2004) |
| December 9 | 60.1°F (2004) | 10.0°F (2002) | 1.73 in (2009) |
| December 10 | 57.0°F (1999) | 10.0°F (2002) | 0.91 in (2004) |
| December 11 | 61.0°F (2006) | 10.9°F (2005) | 1.92 in (2003) |
| December 12 | 66.9°F (2021) | 12.9°F (2013) | 1.17 in (2002) |
| December 13 | 73.0°F (2015) | 12.0°F (2005) | 0.27 in (2001) |
| December 14 | 71.1°F (2015) | 6.1°F (2005) | 1.19 in (2000) |
| December 15 | 66.9°F (2015) | 7.0°F (2005) | 0.63 in (2020) |
| December 16 | 62.1°F (2006) | 6.1°F (2016) | 2.41 in (2018) |
| December 17 | 66.9°F (2021) | 6.1°F (2010) | 1.35 in (2020) |
| December 18 | 66.9°F (2006) | 12.0°F (2010) | 0.32 in (2015) |
| December 19 | 70.0°F (2006) | 17.1°F (2007) | 0.59 in (2009) |
| December 20 | 61.0°F (2017) | 8.1°F (2004) | 1.26 in (2009) |
| December 21 | 60.1°F (2018) | 6.1°F (2000) | 0.85 in (2012) |
| December 22 | 68.0°F (2013) | 8.1°F (2000) | 0.21 in (2015) |
| December 23 | 68.0°F (2013) | 0.0°F (2000) | 0.90 in (2006) |
| December 24 | 66.9°F (2015) | 0.0°F (2000) | 0.73 in (2004) |
| December 25 | 71.1°F (2015) | 7.0°F (2009) | 1.42 in (2020) |
| December 26 | 63.0°F (2015) | 1.9°F (2000) | 1.14 in (2009) |
| December 27 | 57.9°F (2021) | 1.9°F (2000) | 1.36 in (2012) |
| December 28 | 72.0°F (2015) | 8.1°F (2017) | 0.84 in (2018) |
| December 29 | 61.0°F (2019) | 7.0°F (2000) | 0.89 in (2015) |
| December 30 | 57.0°F (2021) | 10.0°F (2017) | 0.71 in (2013) |
| December 31 | 55.0°F (2006) | 9.0°F (2017) | 0.46 in (2007) |