December weather in Mertzon, TX
The average temperature in Mertzon in December is 45.4°F (30.7°F–60.1°F). Average precipitation: 0.90 inches.
December is a winter month in Mertzon, and is cooler than the annual average of 63.9°F. Daily temperatures swing about 29.4°F between overnight low and afternoon high. Daylight averages about 9h 59m. For travel, December is cool.
Avg High
60.1°F
Avg Low
30.7°F
Precipitation
0.90 in
Daylight
9h 59m
December records in Mertzon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 80.1°F (2014) | 21.9°F (2020) | 0.01 in (2015) |
| December 2 | 79.0°F (2021) | 23.0°F (2019) | 0.66 in (2009) |
| December 3 | 87.1°F (2021) | 26.1°F (2015) | 0.39 in (2016) |
| December 4 | 87.1°F (2021) | 19.0°F (2020) | 0.59 in (2011) |
| December 5 | 81.0°F (2019) | 18.0°F (2020) | 0.24 in (2011) |
| December 6 | 77.0°F (2021) | 25.0°F (2011) | 0.09 in (2017) |
| December 7 | 82.0°F (2012) | 16.0°F (2013) | 0.38 in (2017) |
| December 8 | 81.0°F (2019) | 18.0°F (2011) | 1.05 in (2019) |
| December 9 | 81.0°F (2021) | 19.9°F (2013) | 0.01 in (2018) |
| December 10 | 79.0°F (2020) | 23.0°F (2008) | 0.03 in (2008) |
| December 11 | 82.0°F (2021) | 23.0°F (2008) | 0.04 in (2011) |
| December 12 | 84.9°F (2015) | 19.9°F (2021) | 0.01 in (2011) |
| December 13 | 75.9°F (2019) | 21.9°F (2013) | 0.42 in (2015) |
| December 14 | 79.0°F (2019) | 17.1°F (2020) | 0.22 in (2018) |
| December 15 | 87.1°F (2019) | 16.0°F (2020) | 0.00 in (2008) |
| December 16 | 77.0°F (2021) | 19.0°F (2020) | 0.01 in (2016) |
| December 17 | 75.0°F (2016) | 17.1°F (2020) | 0.02 in (2017) |
| December 18 | 79.0°F (2016) | 14.0°F (2016) | 0.05 in (2021) |
| December 19 | 70.0°F (2013) | 12.9°F (2016) | 0.38 in (2017) |
| December 20 | 73.0°F (2008) | 16.0°F (2016) | 0.19 in (2011) |
| December 21 | 72.0°F (2017) | 19.9°F (2019) | 0.65 in (2013) |
| December 22 | 75.9°F (2017) | 19.9°F (2019) | 0.10 in (2017) |
| December 23 | 78.1°F (2015) | 9.0°F (2022) | 0.00 in (2008) |
| December 24 | 84.9°F (2021) | 10.9°F (2022) | 0.64 in (2009) |
| December 25 | 84.9°F (2021) | 10.9°F (2022) | 0.51 in (2011) |
| December 26 | 84.0°F (2021) | 16.0°F (2022) | 0.06 in (2011) |
| December 27 | 90.0°F (2021) | 23.0°F (2022) | 0.93 in (2015) |
| December 28 | 82.0°F (2021) | 16.0°F (2009) | 0.28 in (2015) |
| December 29 | 78.1°F (2016) | 18.0°F (2009) | 0.03 in (2009) |
| December 30 | 73.0°F (2021) | 19.0°F (2012) | 0.11 in (2009) |
| December 31 | 79.0°F (2021) | 18.0°F (2019) | 0.63 in (2020) |