December weather in Wilton, IA
The average temperature in Wilton in December is 28.0°F (20.1°F–35.9°F). Average precipitation: 1.99 inches. Average snowfall is 7.4 inches.
December is a winter month in Wilton, and is cooler than the annual average of 50.1°F. Daily temperatures swing about 15.8°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 8h 60m. For travel, December is cold.
Avg High
35.9°F
Avg Low
20.1°F
Precipitation
1.99 in
Snow
7.4 in
December records in Wilton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 59.0°F (2003) | 10.9°F (2024) | 0.43 in (2015) |
| December 2 | 60.1°F (2012) | 8.1°F (2005) | 1.00 in (2007) |
| December 3 | 62.1°F (1999) | -2.0°F (2025) | 0.23 in (2023) |
| December 4 | 69.1°F (2012) | -2.0°F (2025) | 0.77 in (2011) |
| December 5 | 64.9°F (2017) | -2.0°F (2025) | 0.43 in (2016) |
| December 6 | 66.9°F (2001) | -2.9°F (2005) | 0.56 in (2004) |
| December 7 | 53.1°F (2001) | -6.0°F (2005) | 0.26 in (2007) |
| December 8 | 57.9°F (2024) | -8.0°F (2005) | 1.09 in (2004) |
| December 9 | 61.0°F (2024) | 1.9°F (2005) | 0.75 in (2022) |
| December 10 | 55.0°F (2020) | -0.9°F (2009) | 1.68 in (2003) |
| December 11 | 59.0°F (2020) | -9.0°F (2000) | 0.43 in (2021) |
| December 12 | 53.1°F (2015) | -4.0°F (2000) | 1.10 in (2020) |
| December 13 | 62.1°F (2015) | -8.0°F (2000) | 0.75 in (2001) |
| December 14 | 63.0°F (2015) | -5.1°F (2025) | 1.59 in (2015) |
| December 15 | 61.0°F (2006) | -6.0°F (2025) | 0.82 in (2012) |
| December 16 | 73.0°F (2021) | -11.9°F (2000) | 0.45 in (2014) |
| December 17 | 60.1°F (2006) | 3.9°F (2008) | 0.24 in (2008) |
| December 18 | 54.0°F (2002) | -11.0°F (2016) | 0.31 in (2002) |
| December 19 | 57.0°F (2002) | -11.0°F (2016) | 0.83 in (2008) |
| December 20 | 50.0°F (2017) | -4.0°F (2000) | 0.79 in (2012) |
| December 21 | 52.0°F (2015) | -2.9°F (1999) | 1.73 in (2006) |
| December 22 | 50.0°F (2015) | -7.1°F (2000) | 0.55 in (2015) |
| December 23 | 53.1°F (2019) | -9.0°F (2000) | 0.95 in (2007) |
| December 24 | 60.1°F (2015) | -9.9°F (2013) | 0.70 in (2015) |
| December 25 | 61.0°F (2021) | -15.0°F (2000) | 0.83 in (2009) |
| December 26 | 61.0°F (2019) | -14.1°F (2000) | 0.44 in (2023) |
| December 27 | 55.9°F (2008) | -14.1°F (2000) | 0.66 in (2018) |
| December 28 | 55.0°F (2008) | -9.9°F (2017) | 0.54 in (2024) |
| December 29 | 57.0°F (2019) | -2.9°F (2000) | 1.28 in (2019) |
| December 30 | 64.9°F (2022) | -4.0°F (2013) | 1.47 in (2020) |
| December 31 | 61.0°F (2004) | -8.0°F (2017) | 0.46 in (2024) |