Average High: 81 Average Low: 61 (recorded for the National Weather Service at KJAN, Atlantic, IA)
| Date | Sunrise | Sunset | High | Year | Low | Year |
| 1 | 4:48 | 7:47 | 99 | 1934 | 36 | 1956 |
| 2 | 4:48 | 7:48 | 100 | 1934 | 36 | 1907 |
| 3 | 4:47 | 7:48 | 94 | 2020 | 32 | 1969 |
| 4 | 4:47 | 7:49 | 96 | 1914 | 31 | 1945 |
| 5 | 4:47 | 7:50 | 104 | 1933 | 40 | 1897/1935 |
| 6 | 4:46 | 7:50 | 103 | 1933 | 32 | 1894 |
| 7 | 4:46 | 7:51 | 98 | 1934/2011 | 36 | 1894 |
| 8 | 4:46 | 7:52 | 102 | 1985 | 38 | 1930 |
| 9 | 4:46 | 7:52 | 101 | 1985 | 38 | 1915 |
| 10 | 4:45 | 7:53 | 104 | 1933 | 40 | 1966 |
| 11 | 4:45 | 7:53 | 99 | 1892 | 36 | 1903 |
| 12 | 4:45 | 7:54 | 95 | 1892 | 38 | 1903 |
| 13 | 4:45 | 7:54 | 100 | 2022 | 37 | 1906 |
| 14 | 4:45 | 7:55 | 97 | 1987 | 41 | 1933 |
| 15 | 4:45 | 7:56 | 99 | 1918 | 40 | 1906/1969 |
| 16 | 4:45 | 7:56 | 103 | 1946 | 42 | 1974 |
| 17 | 4:45 | 7:56 | 102 | 1918/2021 | 40 | 1974 |
| 18 | 4:45 | 7:56 | 98 | 1910 | 46 | 1974/2000 |
| 19 | 4:45 | 7:56 | 104 | 1974 | 42 | 1900 |
| 20 | 4:46 | 7:57 | 101 | 1937/1988 | 40 | 1961 |
| 21 | 4:46 | 7:57 | 101 | 1988 | 38 | 1902 |
| 22 | 4:46 | 7:57 | 100 | 1933 | 39 | 1972 |
| 23 | 4:46 | 7:57 | 105 | 1937 | 44 | 1958 |
| 24 | 4:47 | 7:57 | 105 | 1937 | 41 | 1961 |
| 25 | 4:47 | 7:58 | 106 | 1937 | 40 | 2004 |
| 26 | 4:47 | 7:58 | 103 | 1934/1936 | 43 | 1902 |
| 27 | 4:48 | 7:58 | 103 | 1934 | 43 | 1938/1958/ 1968 |
| 28 | 4:48 | 7:58 | 103 | 1936 | 50 | 1896/2006 |
| 29 | 4:48 | 7:58 | 102 | 1934 | 46 | 1950 |
| 30 | 4:49 | 7:58 | 101 | 1933 | 43 | 1940 |
