December weather in St. Johns, AZ
The average temperature in St. Johns in December is 33.6°F (18.4°F–48.8°F). Average precipitation: 0.88 inches.
December is a winter month in St. Johns, and is cooler than the annual average of 54.1°F. Daily temperatures swing about 30.4°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 9h 42m. For travel, December is cool.
Avg High
48.8°F
Avg Low
18.4°F
Precipitation
0.88 in
Daylight
9h 42m
December records in St. Johns
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 72.0°F (2003) | 5.2°F (2006) | 0.42 in (2007) |
| December 2 | 69.1°F (2008) | 7.2°F (2015) | 0.31 in (2002) |
| December 3 | 66.0°F (2010) | 11.1°F (2009) | 0.38 in (2002) |
| December 4 | 66.9°F (2010) | 5.2°F (2009) | 0.97 in (2014) |
| December 5 | 70.0°F (2012) | 5.2°F (2009) | 0.01 in (2011) |
| December 6 | 71.1°F (2003) | 8.1°F (2005) | 0.06 in (2018) |
| December 7 | 62.1°F (2000) | 9.0°F (2005) | 0.15 in (2019) |
| December 8 | 62.1°F (2000) | 6.3°F (2011) | 0.46 in (2019) |
| December 9 | 62.1°F (2010) | 7.0°F (2001) | 0.04 in (2007) |
| December 10 | 70.0°F (2015) | 5.2°F (2013) | 0.12 in (2020) |
| December 11 | 63.0°F (2015) | 6.3°F (2024) | 0.11 in (2007) |
| December 12 | 64.0°F (2004) | 6.1°F (2001) | 0.47 in (2015) |
| December 13 | 64.9°F (2004) | -6.0°F (2001) | 0.32 in (2014) |
| December 14 | 71.1°F (2010) | 0.0°F (2001) | 0.17 in (2012) |
| December 15 | 68.0°F (2006) | 1.0°F (1999) | 0.14 in (2012) |
| December 16 | 63.0°F (2006) | 9.0°F (1999) | 0.06 in (2010) |
| December 17 | 64.9°F (2025) | 8.1°F (2001) | 0.10 in (2014) |
| December 18 | 64.0°F (1999) | 9.1°F (2019) | 0.08 in (2002) |
| December 19 | 72.0°F (2025) | 3.9°F (2000) | 0.06 in (2012) |
| December 20 | 71.1°F (2003) | 6.3°F (2012) | 0.00 in (1999) |
| December 21 | 72.0°F (2025) | 10.0°F (1999) | 0.12 in (2004) |
| December 22 | 72.0°F (2025) | 9.0°F (2004) | 0.35 in (2016) |
| December 23 | 71.1°F (2025) | 3.9°F (2004) | 0.30 in (2002) |
| December 24 | 64.0°F (2025) | 1.9°F (2004) | 0.24 in (2021) |
| December 25 | 64.9°F (2005) | 3.0°F (2002) | 0.07 in (2000) |
| December 26 | 66.9°F (2005) | -2.9°F (2002) | 0.19 in (2018) |
| December 27 | 66.9°F (2006) | 1.0°F (2002) | 0.15 in (2019) |
| December 28 | 63.0°F (2004) | -0.8°F (2008) | 0.10 in (2006) |
| December 29 | 70.0°F (2024) | 6.1°F (2003) | 0.33 in (2004) |
| December 30 | 66.9°F (2017) | 3.2°F (2018) | 0.05 in (2010) |
| December 31 | 81.0°F (2002) | -2.7°F (2010) | 0.28 in (2018) |