December weather in Wiley, CO
The average temperature in Wiley in December is 30.9°F (14.4°F–47.4°F). Average precipitation: 0.13 inches.
December is a winter month in Wiley, and is cooler than the annual average of 54°F. Daily temperatures swing about 33°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 9h 22m. For travel, December is cool.
Avg High
47.4°F
Avg Low
14.4°F
Precipitation
0.13 in
Daylight
9h 22m
December records in Wiley
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 75.9°F (1998) | 7.0°F (2005) | 0.05 in (2023) |
| December 2 | 75.9°F (2003) | 8.2°F (2016) | 0.01 in (2007) |
| December 3 | 73.9°F (2017) | 3.0°F (1996) | 0.17 in (2002) |
| December 4 | 75.0°F (2007) | -1.8°F (2011) | 0.01 in (1999) |
| December 5 | 75.0°F (2021) | -8.9°F (2011) | 0.05 in (2019) |
| December 6 | 70.0°F (2023) | -11.7°F (2011) | 0.04 in (1998) |
| December 7 | 73.9°F (2023) | -16.1°F (2005) | 0.01 in (2005) |
| December 8 | 68.0°F (2015) | -18.0°F (2005) | 0.02 in (2003) |
| December 9 | 73.9°F (1996) | -13.9°F (2009) | 0.00 in (1999) |
| December 10 | 70.0°F (1996) | -11.7°F (2009) | 0.11 in (2007) |
| December 11 | 78.1°F (2025) | -2.9°F (2000) | 0.04 in (2001) |
| December 12 | 70.0°F (2021) | 6.1°F (1997) | 0.14 in (2020) |
| December 13 | 64.9°F (2008) | -5.8°F (2020) | 0.22 in (2023) |
| December 14 | 71.1°F (2021) | -3.8°F (2020) | 0.32 in (2014) |
| December 15 | 71.1°F (2006) | 0.1°F (2008) | 0.00 in (1998) |
| December 16 | 68.0°F (2025) | 2.1°F (2022) | 0.00 in (1998) |
| December 17 | 72.0°F (2025) | -20.7°F (2016) | 0.16 in (2016) |
| December 18 | 66.0°F (2013) | -22.9°F (2016) | 0.09 in (2008) |
| December 19 | 61.0°F (2025) | -16.8°F (2016) | 0.37 in (2006) |
| December 20 | 71.1°F (2004) | -4.0°F (1996) | 0.59 in (2006) |
| December 21 | 66.9°F (2009) | -11.9°F (1998) | 0.00 in (1998) |
| December 22 | 81.0°F (2025) | -11.9°F (1998) | 0.13 in (2001) |
| December 23 | 73.9°F (2025) | -14.1°F (2004) | 0.10 in (2009) |
| December 24 | 79.0°F (2025) | -15.0°F (2004) | 0.25 in (2023) |
| December 25 | 80.1°F (2025) | -9.8°F (2012) | 0.05 in (2016) |
| December 26 | 70.0°F (2005) | -9.8°F (2012) | 0.12 in (2018) |
| December 27 | 73.0°F (2025) | -0.8°F (2012) | 0.24 in (2019) |
| December 28 | 71.1°F (1999) | -0.8°F (2007) | 0.03 in (2025) |
| December 29 | 69.1°F (2004) | -5.8°F (2007) | 0.19 in (2006) |
| December 30 | 68.0°F (2016) | -6.9°F (2014) | 0.77 in (2006) |
| December 31 | 68.0°F (1996) | -11.7°F (2014) | 0.05 in (2012) |