Average High: 35 Average Low: 17 (recorded for the National Weather Service at KJAN, Atlantic, IA)
| Date | Sunrise | Sunset | High | Year | Low | Year |
| 1 | 7:26 | 4:51 | 67 | 1998 | -10 | 1892 |
| 2 | 7:27 | 4:50 | 65 | 2021 | -10 | 1985 |
| 3 | 7:28 | 4:50 | 64 | 2017 | -13 | 1919 |
| 4 | 7:29 | 4:50 | 66 | 1998 | -9 | 2025 |
| 5 | 7:30 | 4:50 | 66 | 2001 | -14 | 2005 |
| 6 | 7:31 | 4:50 | 69 | 1939 | -12 | 2005 |
| 7 | 7:32 | 4:50 | 64 | 1894 | -15 | 2005 |
| 8 | 7:33 | 4:50 | 67 | 1946 | -18 | 1917/1976 |
| 9 | 7:34 | 4:50 | 62 | 1946/2020 | -17 | 1917/2005 |
| 10 | 7:35 | 4:50 | 58 | 1891 | -14 | 1917 |
| 11 | 7:36 | 4:50 | 64 | 1965 | -14 | 1917 |
| 12 | 7:36 | 4:50 | 62 | 1921/1968 | -20 | 1932 |
| 13 | 7:37 | 4:50 | 65 | 1921 | -20 | 1961 |
| 14 | 7:38 | 4:50 | 59 | 1975 | -19 | 1901/1972 |
| 15 | 7:39 | 4:51 | 72 | 2021 | -19 | 1901 |
| 16 | 7:39 | 4:51 | 59 | 1962 | -22 | 1951 |
| 17 | 7:40 | 4:51 | 65 | 1939 | -18 | 1951 |
| 18 | 7:41 | 4:51 | 66 | 1976 | -28 | 1983 |
| 19 | 7:41 | 4:51 | 58 | 1966 | -33 | 1983 |
| 20 | 7:42 | 4:52 | 61 | 1941 | -25 | 1901 |
| 21 | 7:42 | 4:52 | 58 | 1941 | -22 | 1989 |
| 22 | 7:42 | 4:52 | 65 | 1933 | -27 | 1989 |
| 23 | 7:43 | 4:53 | 62 | 1964 | -22 | 1983 |
| 24 | 7:44 | 4:54 | 57 | 2023 | -23 | 1983 |
| 25 | 7:44 | 4:55 | 60 | 2019 | -20 | 1983 |
| 26 | 7:45 | 4:56 | 59 | 1936 | -18 | 1982 |
| 27 | 7:45 | 4:56 | 65 | 1946 | -21 | 1924 |
| 28 | 7:45 | 4:57 | 65 | 1984 | -25 | 1924 |
| 29 | 7:45 | 4:58 | 60 | 1984 | -22 | 1917 |
| 30 | 7:46 | 4:59 | 64 | 2004 | -22 | 1917 |
| 31 | 7:46 | 4:59 | 60 | 1891 | -26 | 2017 |
