Average High: 72 Average Low: 51 (recorded for the National Weather Service at KJAN, Atlantic, IA)
| Date | Sunrise | Sunset | High | Year | Low | Year |
| 1 | 5:17 | 7:17 | 90 | 1965 | 24 | 1909 |
| 2 | 5:15 | 7:18 | 91 | 1968 | 17 | 1908 |
| 3 | 5:14 | 7:19 | 87 | 1895/1949/ 1968 | 25 | 1900 |
| 4 | 5:14 | 7:21 | 91 | 1918 | 18 | 1907 |
| 5 | 5:12 | 7:22 | 96 | 1909 | 28 | 2021 |
| 6 | 5:11 | 7:23 | 97 | 1934 | 23 | 1891 |
| 7 | 5:10 | 7:24 | 95 | 1966 | 24 | 1931 |
| 8 | 5:09 | 7:25 | 95 | 1895 | 25 | 1980 |
| 9 | 5:08 | 7:26 | 96 | 1895 | 24 | 1980 |
| 10 | 5:07 | 7:27 | 97 | 2011 | 26 | 1966 |
| 11 | 5:06 | 7:28 | 95 | 2000 | 27 | 1891/1946/ 1981 |
| 12 | 5:05 | 7:29 | 94 | 1956 | 25 | 1895 |
| 13 | 5:04 | 7:30 | 95 | 1915 | 23 | 1997 |
| 14 | 5:03 | 7:31 | 97 | 2013 | 29 | 1937 |
| 15 | 5:02 | 7:32 | 91 | 1894/2017 | 29 | 1929/1973/ 1983 |
| 16 | 5:01 | 7:33 | 93 | 1939 | 25 | 1907 |
| 17 | 5:00 | 7:34 | 92 | 1908/1939 | 32 | 1912/1973 |
| 18 | 4:59 | 7:35 | 94 | 1934 | 32 | 1891 |
| 19 | 4:58 | 7:36 | 94 | 1934/1975 | 22 | 1894 |
| 20 | 4:56 | 7:36 | 95 | 1925 | 26 | 1894 |
| 21 | 4:55 | 7:37 | 97 | 1939 | 27 | 1895 |
| 22 | 4:54 | 7:38 | 98 | 1925 | 28 | 1895/1963 |
| 23 | 4:54 | 7:39 | 97 | 1939 | 26 | 1963 |
| 24 | 4:53 | 7:40 | 101 | 1939 | 33 | 1924 |
| 25 | 4:53 | 7:40 | 98 | 1967 | 30 | 1925 |
| 26 | 4:52 | 7:42 | 100 | 2018 | 30 | 1901 |
| 27 | 4:51 | 7:43 | 100 | 2018 | 31 | 1907 |
| 28 | 4:50 | 7:44 | 97 | 2018 | 29 | 1894 |
| 29 | 4:50 | 7:44 | 104 | 1934 | 29 | 1947 |
| 30 | 4:49 | 7:45 | 105 | 1934 | 33 | 1930 |
| 31 | 4:48 | 7:45 | 101 | 1934 | 31 | 1897 |
