Average High: 62 Average Low: 39 (recorded for the National Weather Service at KJAN, Atlantic, IA)
| Date | Sunrise | Sunset | High | Year | Low | Year |
| 1 | 6:04 | 6:45 | 87 | 2003 | 14 | 1924 |
| 2 | 6:01 | 6:46 | 88 | 2012 | 13 | 1970 |
| 3 | 6:00 | 6:47 | 85 | 1981 | 4 | 1975 |
| 4 | 5:58 | 6:48 | 91 | 1929 | 4 | 1899 |
| 5 | 5:56 | 6:49 | 88 | 2000 | 14 | 1920 |
| 6 | 5:55 | 6:50 | 89 | 1972 | 6 | 1982 |
| 7 | 5:53 | 6:51 | 85 | 2020 | 10 | 2018 |
| 8 | 5:52 | 6:52 | 89 | 1931 | 14 | 2016 |
| 9 | 5:50 | 6:53 | 85 | 1977 | 14 | 2016 |
| 10 | 5:48 | 6:54 | 94 | 1930 | 17 | 1989 |
| 11 | 5:47 | 6:55 | 91 | 1996 | 18 | 1956/2004 |
| 12 | 5:45 | 6:57 | 86 | 1916 | 13 | 1957 |
| 13 | 5:44 | 6:58 | 88 | 2006 | 11 | 1950 |
| 14 | 5:42 | 6:59 | 89 | 2003 | 11 | 1907 |
| 15 | 5:40 | 7:00 | 84 | 1920 | 17 | 1926/1962 |
| 16 | 5:39 | 7:01 | 88 | 1898 | 19 | 1988 |
| 17 | 5:37 | 7:02 | 85 | 2004 | 11 | 1907 |
| 18 | 5:36 | 7:03 | 89 | 1948 | 17 | 1905 |
| 19 | 5:34 | 7:04 | 87 | 1908/1946/ 1987 | 15 | 1988 |
| 20 | 5:33 | 7:05 | 90 | 1902 | 18 | 1956 |
| 21 | 5:31 | 7:07 | 88 | 1980 | 16 | 1907 |
| 22 | 5:30 | 7:08 | 90 | 1980 | 20 | 1936 |
| 23 | 5:29 | 7:09 | 88 | 1950 | 19 | 1893 |
| 24 | 5:27 | 7:10 | 91 | 1989 | 9 | 1956 |
| 25 | 5:26 | 7:11 | 91 | 2012 | 20 | 1934 |
| 26 | 5:24 | 7:12 | 92 | 1987/1989 | 15 | 1907 |
| 27 | 5:23 | 7:13 | 90 | 1989 | 23 | 1950 |
| 28 | 5:21 | 7:14 | 94 | 1910 | 26 | 1965 |
| 29 | 5:20 | 7:15 | 93 | 1987 | 22 | 1958 |
| 30 | 5:19 | 7:16 | 92 | 1926 | 19 | 1958 |
