December weather in Shell Rock, IA
The average temperature in Shell Rock in December is 22.6°F (14.6°F–30.5°F). Average precipitation: 1.35 inches.
December is a winter month in Shell Rock, and is cooler than the annual average of 46.7°F. Daily temperatures swing about 15.9°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 8h 52m. For travel, December is cold.
Avg High
30.5°F
Avg Low
14.6°F
Precipitation
1.35 in
Daylight
8h 52m
December records in Shell Rock
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 64.0°F (1962) | 0.0°F (1940) | 0.90 in (1981) |
| December 2 | 61.0°F (1973) | -13.0°F (1919) | 1.17 in (2007) |
| December 3 | 63.0°F (1962) | -16.1°F (1919) | 0.90 in (1990) |
| December 4 | 66.0°F (2012) | -11.9°F (2025) | 1.20 in (1947) |
| December 5 | 64.9°F (2017) | -11.0°F (2025) | 1.28 in (1982) |
| December 6 | 60.1°F (1939) | -14.1°F (1917) | 0.60 in (1935) |
| December 7 | 54.0°F (1916) | -15.0°F (1972) | 0.60 in (1926) |
| December 8 | 64.9°F (1946) | -20.9°F (1917) | 0.45 in (1914) |
| December 9 | 61.0°F (1946) | -18.9°F (1958) | 4.00 in (2008) |
| December 10 | 57.9°F (1979) | -27.0°F (1919) | 0.65 in (1964) |
| December 11 | 55.9°F (1949) | -11.9°F (1917) | 0.66 in (1965) |
| December 12 | 57.9°F (1968) | -17.0°F (1932) | 1.50 in (1968) |
| December 13 | 53.1°F (1921) | -20.9°F (1917) | 1.00 in (2015) |
| December 14 | 54.0°F (1998) | -18.0°F (1985) | 1.50 in (2015) |
| December 15 | 55.9°F (2021) | -18.0°F (1932) | 0.73 in (2012) |
| December 16 | 70.0°F (2021) | -20.9°F (1932) | 0.60 in (1940) |
| December 17 | 57.0°F (1939) | -14.1°F (1945) | 0.40 in (1951) |
| December 18 | 57.0°F (1923) | -18.9°F (2016) | 0.47 in (2002) |
| December 19 | 48.9°F (1962) | -20.9°F (1983) | 1.10 in (1968) |
| December 20 | 51.1°F (1933) | -22.0°F (1989) | 0.66 in (1991) |
| December 21 | 57.9°F (1941) | -20.9°F (1989) | 1.63 in (1984) |
| December 22 | 48.0°F (2019) | -20.9°F (1989) | 0.80 in (1968) |
| December 23 | 50.0°F (2019) | -20.9°F (1989) | 0.80 in (2014) |
| December 24 | 48.0°F (2023) | -22.0°F (1983) | 0.65 in (2015) |
| December 25 | 55.0°F (1936) | -18.9°F (2000) | 0.45 in (1951) |
| December 26 | 55.9°F (2019) | -26.0°F (1914) | 0.80 in (1941) |
| December 27 | 54.0°F (1936) | -25.1°F (1933) | 1.00 in (2018) |
| December 28 | 59.0°F (1984) | -22.0°F (1924) | 1.35 in (1982) |
| December 29 | 55.0°F (1984) | -20.0°F (1917) | 2.40 in (2007) |
| December 30 | 54.0°F (2004) | -18.9°F (1914) | 0.95 in (1936) |
| December 31 | 57.0°F (1929) | -20.0°F (1973) | 0.68 in (2006) |