December weather in Cromwell, IA
The average temperature in Cromwell in December is 25.8°F (16.0°F–35.7°F). Average precipitation: 1.48 inches.
December is a winter month in Cromwell, and is cooler than the annual average of 48.8°F. Daily temperatures swing about 19.7°F between overnight low and afternoon high. Daylight averages about 9h 4m. For travel, December is cold.
Avg High
35.7°F
Avg Low
16.0°F
Precipitation
1.48 in
Daylight
9h 4m
December records in Cromwell
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 62.1°F (2003) | -2.0°F (1944) | 0.88 in (1913) |
| December 2 | 64.9°F (1947) | -5.1°F (1985) | 1.10 in (2007) |
| December 3 | 60.1°F (1951) | -8.0°F (1919) | 0.98 in (2018) |
| December 4 | 64.0°F (1946) | -6.0°F (2025) | 1.35 in (1947) |
| December 5 | 66.0°F (2017) | -6.0°F (2025) | 0.67 in (1960) |
| December 6 | 69.1°F (1946) | -9.0°F (1917) | 1.30 in (1913) |
| December 7 | 64.9°F (1946) | -11.9°F (1936) | 0.87 in (1994) |
| December 8 | 69.1°F (1946) | -20.0°F (1917) | 1.25 in (1980) |
| December 9 | 60.1°F (1930) | -20.0°F (1917) | 1.10 in (1907) |
| December 10 | 59.0°F (1918) | -24.0°F (1919) | 1.19 in (1911) |
| December 11 | 64.9°F (1965) | -15.0°F (1917) | 0.46 in (1970) |
| December 12 | 63.0°F (1968) | -18.9°F (1932) | 0.66 in (2001) |
| December 13 | 60.1°F (1921) | -18.0°F (1917) | 0.65 in (1992) |
| December 14 | 57.0°F (1906) | -18.0°F (1917) | 3.82 in (2015) |
| December 15 | 60.1°F (2021) | -16.1°F (1963) | 0.27 in (1987) |
| December 16 | 71.1°F (2021) | -20.9°F (1932) | 0.85 in (1940) |
| December 17 | 61.0°F (1939) | -14.1°F (1914) | 0.35 in (1977) |
| December 18 | 62.1°F (1976) | -18.0°F (1985) | 1.00 in (1968) |
| December 19 | 57.0°F (1941) | -18.0°F (1983) | 0.22 in (1952) |
| December 20 | 61.0°F (1941) | -13.0°F (1983) | 0.95 in (2012) |
| December 21 | 61.0°F (1941) | -22.0°F (1916) | 1.10 in (1911) |
| December 22 | 64.0°F (1933) | -26.0°F (1989) | 0.55 in (2013) |
| December 23 | 64.0°F (1964) | -24.0°F (1989) | 1.79 in (1941) |
| December 24 | 57.9°F (1964) | -20.0°F (1983) | 1.18 in (1965) |
| December 25 | 55.9°F (1936) | -23.1°F (1983) | 0.40 in (1982) |
| December 26 | 57.9°F (2019) | -14.1°F (1914) | 0.77 in (2016) |
| December 27 | 64.0°F (1946) | -14.1°F (2017) | 0.65 in (1959) |
| December 28 | 66.0°F (1984) | -14.1°F (2017) | 1.46 in (1982) |
| December 29 | 64.0°F (1984) | -22.0°F (1917) | 0.54 in (1948) |
| December 30 | 60.1°F (1929) | -22.0°F (1917) | 0.88 in (2020) |
| December 31 | 63.0°F (2004) | -17.0°F (1976) | 1.28 in (1931) |