December weather in Marengo, IA
The average temperature in Marengo in December is 25.3°F (16.3°F–34.2°F). Average precipitation: 1.69 inches. Average snowfall is 6.3 inches.
December is a winter month in Marengo, and is cooler than the annual average of 48.2°F. Daily temperatures swing about 17.9°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 8h 59m. For travel, December is cold.
Avg High
34.2°F
Avg Low
16.3°F
Precipitation
1.69 in
Snow
6.3 in
December records in Marengo
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 62.1°F (1962) | 3.9°F (1960) | 1.26 in (1945) |
| December 2 | 66.9°F (1973) | -4.0°F (1929) | 1.56 in (2007) |
| December 3 | 66.0°F (1951) | -9.0°F (1985) | 0.75 in (1932) |
| December 4 | 66.9°F (2012) | -7.1°F (2025) | 1.31 in (1925) |
| December 5 | 71.1°F (1998) | -9.9°F (2005) | 1.37 in (1973) |
| December 6 | 68.0°F (2001) | -11.0°F (1917) | 1.01 in (1943) |
| December 7 | 62.1°F (1916) | -14.1°F (2005) | 0.99 in (1927) |
| December 8 | 66.0°F (1946) | -17.0°F (2005) | 1.25 in (1980) |
| December 9 | 63.0°F (1918) | -18.0°F (1958) | 1.21 in (2009) |
| December 10 | 59.0°F (1979) | -26.0°F (1919) | 0.72 in (2003) |
| December 11 | 63.0°F (1949) | -18.0°F (1972) | 0.88 in (1970) |
| December 12 | 59.0°F (1968) | -13.0°F (1932) | 1.41 in (2007) |
| December 13 | 61.0°F (2015) | -18.9°F (1961) | 0.66 in (1928) |
| December 14 | 62.1°F (2015) | -15.0°F (1985) | 1.82 in (2015) |
| December 15 | 57.9°F (2006) | -16.1°F (1989) | 1.90 in (1971) |
| December 16 | 73.9°F (2021) | -20.0°F (1951) | 0.95 in (1921) |
| December 17 | 60.1°F (1939) | -9.9°F (1932) | 0.43 in (1985) |
| December 18 | 63.0°F (1939) | -20.0°F (1985) | 0.29 in (1951) |
| December 19 | 61.0°F (2002) | -27.0°F (1985) | 0.98 in (2008) |
| December 20 | 57.0°F (1967) | -15.0°F (1983) | 1.47 in (1952) |
| December 21 | 57.9°F (1941) | -20.9°F (1985) | 1.83 in (2006) |
| December 22 | 61.0°F (1933) | -20.9°F (1989) | 1.18 in (2006) |
| December 23 | 59.0°F (1965) | -22.0°F (1989) | 0.88 in (1941) |
| December 24 | 57.0°F (1982) | -23.1°F (1989) | 1.16 in (1965) |
| December 25 | 57.9°F (2023) | -17.0°F (2000) | 0.71 in (2009) |
| December 26 | 59.0°F (2019) | -24.0°F (1962) | 1.10 in (1942) |
| December 27 | 62.1°F (1946) | -17.0°F (1933) | 1.19 in (2018) |
| December 28 | 68.0°F (1984) | -27.9°F (1924) | 0.79 in (2024) |
| December 29 | 66.0°F (1984) | -20.0°F (1917) | 0.88 in (2019) |
| December 30 | 59.0°F (1965) | -18.0°F (1917) | 0.97 in (1971) |
| December 31 | 62.1°F (1965) | -17.0°F (2017) | 1.00 in (1931) |