December weather in Dayton, WY
The average temperature in Dayton in December is 22.9°F (10.0°F–35.7°F). Average precipitation: 0.82 inches. Average snowfall is 11.7 inches.
December is a winter month in Dayton, and is cooler than the annual average of 43.9°F. Daily temperatures swing about 25.7°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 8h 37m. For travel, December is cold.
Avg High
35.7°F
Avg Low
10.0°F
Precipitation
0.82 in
Snow
11.7 in
December records in Dayton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 64.9°F (2021) | -15.0°F (2014) | 0.11 in (2000) |
| December 2 | 75.9°F (2021) | -8.0°F (2014) | 0.37 in (1997) |
| December 3 | 55.9°F (2007) | -8.0°F (2009) | 1.15 in (2013) |
| December 4 | 63.0°F (2007) | -7.1°F (2009) | 0.32 in (2021) |
| December 5 | 64.0°F (2023) | -7.1°F (2013) | 0.25 in (2011) |
| December 6 | 60.1°F (2023) | -23.1°F (2013) | 0.65 in (2025) |
| December 7 | 57.9°F (2020) | -27.0°F (2013) | 0.21 in (1955) |
| December 8 | 59.0°F (2020) | -26.0°F (2013) | 0.35 in (2003) |
| December 9 | 60.1°F (2020) | -26.0°F (2013) | 0.33 in (2025) |
| December 10 | 66.0°F (2015) | -15.0°F (2013) | 0.16 in (1992) |
| December 11 | 64.9°F (2025) | -6.0°F (2013) | 1.22 in (2013) |
| December 12 | 64.9°F (2025) | -5.1°F (2016) | 0.52 in (1952) |
| December 13 | 66.9°F (2017) | -16.1°F (2008) | 0.46 in (2022) |
| December 14 | 54.0°F (2014) | -22.0°F (2008) | 0.34 in (1991) |
| December 15 | 59.0°F (2006) | -20.0°F (2008) | 0.70 in (2014) |
| December 16 | 63.0°F (2025) | -15.0°F (2008) | 0.21 in (1996) |
| December 17 | 62.1°F (2025) | -35.0°F (2016) | 0.31 in (1999) |
| December 18 | 62.1°F (2025) | -38.9°F (2016) | 0.46 in (2000) |
| December 19 | 57.9°F (2018) | -18.0°F (2016) | 0.22 in (1996) |
| December 20 | 60.1°F (2020) | -17.0°F (2008) | 0.18 in (2007) |
| December 21 | 57.9°F (2023) | -15.0°F (2008) | 0.35 in (2022) |
| December 22 | 57.9°F (2023) | -9.0°F (2022) | 0.21 in (2008) |
| December 23 | 54.0°F (2021) | -11.0°F (2016) | 0.26 in (2017) |
| December 24 | 48.9°F (2020) | -13.0°F (2017) | 0.47 in (1955) |
| December 25 | 66.0°F (2025) | -11.0°F (2017) | 1.60 in (2014) |
| December 26 | 57.0°F (2025) | -7.1°F (2021) | 0.23 in (2008) |
| December 27 | 64.9°F (2022) | -15.0°F (2017) | 0.12 in (1953) |
| December 28 | 50.0°F (2011) | -15.0°F (2017) | 0.33 in (2025) |
| December 29 | 52.0°F (2011) | -11.9°F (2014) | 0.38 in (2008) |
| December 30 | 52.0°F (2016) | -18.0°F (2014) | 0.60 in (2014) |
| December 31 | 53.1°F (2016) | -16.1°F (2017) | 0.50 in (2011) |