Average High: 30 Average Low: 11 (recorded for the National Weather Service at KJAN, Atlantic, IA)
| Date | Sunrise | Sunset | High | Year | Low | Year |
| 1 | 7:46 | 5:00 | 55 | 1939 | -27 | 2018 |
| 2 | 7:46 | 5:01 | 59 | 1939 | -24 | 2018 |
| 3 | 7:46 | 5:02 | 52 | 1933 | -30 | 2010 |
| 4 | 7:46 | 5:03 | 59 | 1939 | -29 | 2010 |
| 5 | 7:46 | 5:04 | 62 | 2012 | -26 | 2010 |
| 6 | 7:46 | 5:05 | 56 | 1933 | -24 | 1910 |
| 7 | 7:46 | 5:06 | 63 | 2003 | -27 | 1912 |
| 8 | 7:46 | 5:07 | 65 | 2003 | -19 | 1970 |
| 9 | 7:46 | 5:08 | 58 | 2002 | -23 | 1974 |
| 10 | 7:46 | 5:09 | 59 | 1928 | -27 | 1982 |
| 11 | 7:45 | 5:10 | 55 | 1986 | -22 | 1892 |
| 12 | 7:45 | 5:11 | 57 | 1961/1987 | -37 | 1974 |
| 13 | 7:45 | 5:12 | 62 | 1987 | -24 | 1916 |
| 14 | 7:44 | 5:13 | 54 | 1914 | -29 | 1957 |
| 15 | 7:44 | 5:15 | 61 | 1990 | -23 | 1905 |
| 16 | 7:44 | 5:16 | 64 | 1990 | -25 | 2009 |
| 17 | 7:43 | 5:17 | 57 | 1989 | -21 | 1984 |
| 18 | 7:43 | 5:18 | 61 | 1951 | -28 | 1984 |
| 19 | 7:42 | 5:19 | 56 | 1895 | -38* | 1892* |
| 20 | 7:41 | 5:20 | 64 | 1895 | -26 | 1962 |
| 21 | 7:41 | 5:21 | 58 | 1933 | -32 | 1976 |
| 22 | 7:40 | 5:23 | 60 | 1967 | -27 | 1930 |
| 23 | 7:40 | 5:24 | 60 | 1981 | -24 | 1948 |
| 24 | 7:39 | 5:25 | 66 | 1981 | -24 | 1894 |
| 25 | 7:38 | 5:27 | 65 | 1944 | -28 | 1894 |
| 26 | 7:37 | 5:28 | 67 | 2002 | -24 | 1963 |
| 27 | 7:37 | 5:29 | 61 | 1934 | -31 | 1902 |
| 28 | 7:36 | 5:31 | 62 | 2025 | -23 | 1915 |
| 29 | 7:35 | 5:31 | 60 | 2025 | -31 | 1904 |
| 30 | 7:34 | 5:32 | 65 | 2012 | -24 | 1965 |
| 31 | 7:33 | 5:34 | 59 | 2012 | -28 | 1996 |
- Coldest temperature ever recorded in Atlantic
