December weather in Richardson, TX
The average temperature in Richardson in December is 47.6°F (38.0°F–57.3°F). Average precipitation: 3.37 inches.
December is a winter month in Richardson, and is cooler than the annual average of 65.8°F. Daily temperatures swing about 19.3°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 9h 50m. For travel, December is a comfortable month to visit.
Avg High
57.3°F
Avg Low
38.0°F
Precipitation
3.37 in
Daylight
9h 50m
December records in Richardson
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 73.0°F (2021) | 24.1°F (2006) | 1.80 in (1971) |
| December 2 | 81.0°F (2012) | 30.0°F (2008) | 1.55 in (1971) |
| December 3 | 78.1°F (2012) | 28.9°F (2009) | 1.71 in (1998) |
| December 4 | 78.1°F (2013) | 21.9°F (2006) | 1.59 in (2011) |
| December 5 | 77.0°F (1979) | 21.9°F (2009) | 0.81 in (1971) |
| December 6 | 75.9°F (2022) | 18.0°F (2013) | 2.02 in (1960) |
| December 7 | 79.0°F (2007) | 18.0°F (2013) | 1.81 in (1997) |
| December 8 | 77.0°F (2023) | 21.0°F (2006) | 1.95 in (1991) |
| December 9 | 78.1°F (2021) | 23.0°F (2009) | 2.07 in (1971) |
| December 10 | 81.0°F (2021) | 18.0°F (2013) | 1.95 in (1971) |
| December 11 | 78.1°F (1979) | 21.9°F (2012) | 1.65 in (1999) |
| December 12 | 73.0°F (2015) | 24.1°F (2012) | 1.86 in (1946) |
| December 13 | 73.0°F (2017) | 24.1°F (2010) | 3.50 in (1992) |
| December 14 | 75.0°F (2008) | 28.0°F (2025) | 0.98 in (1967) |
| December 15 | 78.1°F (2021) | 23.0°F (2008) | 1.97 in (1959) |
| December 16 | 75.9°F (2006) | 16.0°F (1979) | 2.00 in (2001) |
| December 17 | 77.0°F (2006) | 17.1°F (1979) | 2.53 in (1984) |
| December 18 | 75.9°F (2012) | 15.1°F (2016) | 0.98 in (1998) |
| December 19 | 77.0°F (2012) | 14.0°F (2016) | 2.51 in (2017) |
| December 20 | 80.1°F (2025) | 25.0°F (2016) | 3.22 in (1991) |
| December 21 | 82.9°F (2010) | 19.9°F (2008) | 1.51 in (2013) |
| December 22 | 73.0°F (2025) | 9.0°F (2022) | 0.48 in (2017) |
| December 23 | 79.0°F (2025) | 9.0°F (2022) | 1.55 in (1997) |
| December 24 | 79.0°F (2025) | 19.9°F (2022) | 1.51 in (2024) |
| December 25 | 80.1°F (2021) | 23.0°F (2009) | 2.00 in (2012) |
| December 26 | 89.1°F (2023) | 19.9°F (2012) | 2.85 in (2018) |
| December 27 | 79.0°F (2025) | 21.9°F (2012) | 3.10 in (2015) |
| December 28 | 82.0°F (2025) | 26.1°F (2009) | 0.97 in (2019) |
| December 29 | 72.0°F (2022) | 25.0°F (2007) | 1.63 in (2006) |
| December 30 | 79.0°F (2024) | 25.0°F (2012) | 1.90 in (2002) |
| December 31 | 73.9°F (2011) | 19.9°F (2017) | 2.10 in (2020) |