December weather in Postville, IA
The average temperature in Postville in December is 22.7°F (14.0°F–31.4°F). Average precipitation: 1.57 inches. Average snowfall is 8.0 inches.
December is a winter month in Postville, and is cooler than the annual average of 46°F. Daily temperatures swing about 17.4°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 8h 50m. For travel, December is cold.
Avg High
31.4°F
Avg Low
14.0°F
Precipitation
1.57 in
Snow
8.0 in
December records in Postville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 57.0°F (2003) | -2.9°F (1930) | 0.81 in (1945) |
| December 2 | 53.1°F (2017) | -13.0°F (1919) | 1.44 in (2007) |
| December 3 | 52.0°F (2012) | -20.0°F (1940) | 0.83 in (1990) |
| December 4 | 64.0°F (2012) | -9.0°F (2025) | 0.89 in (2011) |
| December 5 | 61.0°F (2001) | -9.0°F (2005) | 0.63 in (1924) |
| December 6 | 63.0°F (2001) | -9.0°F (1917) | 0.77 in (1943) |
| December 7 | 57.0°F (1916) | -11.9°F (1936) | 1.04 in (1926) |
| December 8 | 55.9°F (2024) | -18.9°F (1917) | 0.32 in (1987) |
| December 9 | 55.9°F (2024) | -11.9°F (1919) | 0.92 in (2009) |
| December 10 | 54.0°F (2020) | -23.1°F (1919) | 0.21 in (2012) |
| December 11 | 53.1°F (2020) | -14.1°F (1917) | 1.92 in (1899) |
| December 12 | 51.1°F (1939) | -11.9°F (1901) | 0.97 in (2010) |
| December 13 | 50.0°F (1913) | -25.1°F (1901) | 2.36 in (2015) |
| December 14 | 55.0°F (2015) | -20.0°F (1901) | 2.46 in (2015) |
| December 15 | 55.0°F (2021) | -18.0°F (1919) | 0.91 in (1940) |
| December 16 | 68.0°F (2021) | -38.0°F (1988) | 0.91 in (1894) |
| December 17 | 53.1°F (1939) | -18.0°F (1901) | 0.70 in (1908) |
| December 18 | 53.1°F (1923) | -22.0°F (2016) | 0.28 in (1990) |
| December 19 | 52.0°F (2002) | -20.0°F (2016) | 0.81 in (2008) |
| December 20 | 46.0°F (2018) | -26.0°F (1989) | 0.83 in (1902) |
| December 21 | 51.1°F (1941) | -27.0°F (1989) | 1.00 in (1897) |
| December 22 | 51.1°F (1941) | -26.0°F (1990) | 0.59 in (1942) |
| December 23 | 50.0°F (1936) | -20.0°F (1989) | 0.32 in (1900) |
| December 24 | 48.9°F (2020) | -16.1°F (2013) | 0.86 in (1895) |
| December 25 | 53.1°F (1936) | -22.0°F (1990) | 1.02 in (2009) |
| December 26 | 54.0°F (1936) | -23.1°F (1914) | 0.85 in (2016) |
| December 27 | 48.0°F (2008) | -24.0°F (1933) | 1.00 in (1904) |
| December 28 | 48.0°F (2003) | -24.0°F (1924) | 0.80 in (2024) |
| December 29 | 52.0°F (2019) | -18.9°F (1917) | 1.34 in (2019) |
| December 30 | 57.0°F (1904) | -17.0°F (1909) | 0.85 in (1906) |
| December 31 | 55.0°F (2004) | -16.1°F (1987) | 0.60 in (1911) |