December weather in Grundy Center, IA
The average temperature in Grundy Center in December is 23.6°F (15.1°F–32.1°F). Average precipitation: 1.44 inches. Average snowfall is 9.5 inches.
December is a winter month in Grundy Center, and is cooler than the annual average of 47.1°F. Daily temperatures swing about 17°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 8h 55m. For travel, December is cold.
Avg High
32.1°F
Avg Low
15.1°F
Precipitation
1.44 in
Snow
9.5 in
December records in Grundy Center
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 64.0°F (1962) | -9.0°F (1893) | 0.92 in (1981) |
| December 2 | 63.0°F (1998) | -8.0°F (1919) | 0.60 in (2018) |
| December 3 | 73.0°F (1998) | -14.1°F (1919) | 0.66 in (1902) |
| December 4 | 66.9°F (2012) | -11.0°F (2025) | 0.90 in (2011) |
| December 5 | 68.0°F (2017) | -13.0°F (2005) | 0.99 in (1973) |
| December 6 | 66.0°F (2001) | -14.1°F (1917) | 0.84 in (1982) |
| December 7 | 60.1°F (1894) | -16.1°F (2005) | 0.87 in (1994) |
| December 8 | 66.0°F (1946) | -18.9°F (1917) | 0.40 in (1914) |
| December 9 | 63.0°F (1946) | -20.9°F (1958) | 0.63 in (2009) |
| December 10 | 61.0°F (1998) | -20.9°F (1919) | 1.66 in (1899) |
| December 11 | 64.9°F (1965) | -14.1°F (1976) | 0.77 in (1964) |
| December 12 | 55.9°F (1965) | -15.0°F (1932) | 0.58 in (1972) |
| December 13 | 57.9°F (1968) | -20.9°F (1903) | 3.18 in (2015) |
| December 14 | 57.0°F (1975) | -25.1°F (1901) | 4.00 in (1920) |
| December 15 | 59.0°F (2021) | -23.1°F (1901) | 0.95 in (1894) |
| December 16 | 72.0°F (2021) | -18.9°F (1963) | 0.70 in (1921) |
| December 17 | 55.9°F (1923) | -15.0°F (1914) | 0.45 in (1908) |
| December 18 | 57.9°F (1962) | -20.0°F (1901) | 0.23 in (1951) |
| December 19 | 55.9°F (2002) | -22.0°F (1985) | 1.10 in (1968) |
| December 20 | 55.0°F (1933) | -20.0°F (1901) | 2.51 in (1925) |
| December 21 | 59.0°F (1941) | -26.0°F (1963) | 4.00 in (1920) |
| December 22 | 61.0°F (1933) | -23.1°F (1983) | 1.50 in (1925) |
| December 23 | 54.0°F (2019) | -23.1°F (1989) | 1.07 in (1979) |
| December 24 | 53.1°F (1893) | -20.9°F (1983) | 0.69 in (1932) |
| December 25 | 57.0°F (1936) | -23.1°F (2000) | 1.11 in (2009) |
| December 26 | 57.9°F (2019) | -27.0°F (1914) | 0.65 in (1941) |
| December 27 | 55.0°F (1936) | -22.0°F (1950) | 1.38 in (2018) |
| December 28 | 55.9°F (1912) | -23.1°F (1924) | 1.33 in (1982) |
| December 29 | 64.0°F (1984) | -18.9°F (1917) | 0.89 in (2019) |
| December 30 | 57.9°F (1929) | -14.1°F (1914) | 0.85 in (1972) |
| December 31 | 57.9°F (1965) | -20.0°F (1946) | 0.75 in (2006) |