Average High: 45 Average Low: 25 (recorded for the National Weather Service at KJAN, Atlantic, IA)
***Add one hour for Daylight Saving Time***
| Date | Sunrise | Sunset | High | Year | Low | Year |
| 1 | 6:55 | 6:10 | 77 | 1992 | -32 | 1962 |
| 2 | 6:54 | 6:11 | 76 | 1992 | -12 | 2014 |
| 3 | 6:53 | 6:12 | 79 | 1983 | -11 | 2014 |
| 4 | 6:50 | 6:14 | 78 | 1921 | -17 | 1978 |
| 5 | 6:49 | 6:15 | 74 | 1921 | -31 | 1960 |
| 6 | 6:47 | 6:16 | 76 | 2017 | -20 | 1960 |
| 7 | 6:45 | 6:17 | 78 | 2000 | -11 | 1982 |
| 8 | 6:44 | 6:18 | 76 | 1986 | -12 | 1982 |
| 9 | 6:42 | 6:19 | 76 | 1986/2026 | -10 | 1912 |
| 10 | 6:41 | 6:21 | 78 | 2025 | -8 | 1948 |
| 11 | 6:39 | 6:22 | 74 | 2024 | -22 | 1948 |
| 12 | 6:37 | 6:23 | 74 | 1938 | -21 | 1998 |
| 13 | 6:36 | 6:24 | 79 | 2012 | -11 | 1948/1975 |
| 14 | 6:34 | 6:25 | 78 | 2012 | -12 | 1975 |
| 15 | 6:32 | 6:26 | 79 | 2003 | 0 | 1944 |
| 16 | 6:31 | 6:27 | 84 | 2015 | -4 | 1900 |
| 17 | 6:29 | 6:29 | 84 | 1894 | -11 | 1906 |
| 18 | 6:27 | 6:30 | 81 | 2012 | -1 | 1893 |
| 19 | 6:26 | 6:31 | 79 | 1976/2026 | -14 | 1923 |
| 20 | 6:24 | 6:32 | 84 | 2026 | -7 | 1906 |
| 21 | 6:22 | 6:33 | 94 | 2026 | -7 | 1960 |
| 22 | 6:21 | 6:34 | 86 | 1910 | -6 | 1912 |
| 23 | 6:19 | 6:36 | 86 | 1910 | 4 | 1974 |
| 24 | 6:17 | 6:36 | 83 | 1967 | -2 | 1974 |
| 25 | 6:15 | 6:37 | 91 | 1907 | 5 | 1894 |
| 26 | 6:13 | 6:39 | 88 | 1907 | -2 | 1955 |
| 27 | 6:11 | 6:39 | 85 | 1895 | 6 | 1894 |
| 28 | 6:10 | 6:40 | 84 | 1910/1986 | 11 | 1898 |
| 29 | 6:09 | 6:42 | 90 | 1986 | 5 | 1969 |
| 30 | 6:07 | 6:43 | 88 | 2026 | 8 | 1964 |
| 31 | 6:06 | 6:44 | 87 | 2012 | 12 | 1924 |
