Every August in Jerome, ID from 1916 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.
| Year | Mean, °F | Rank | High, °F | Rank | Low, °F | Rank | Precipitation, in | Rank | Days missing |
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| 2026 | 74.1 | 17 | 88.7 | 57 | 59.4 | 3 | 0.07 | 60 | 0 |
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| 2025 | 72.2 | 44 | 86 | 86 | 58.4 | 7 | 0.28 | 28 | 0 |
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| 2024 | 72.3 | 41 | 87.3 | 68 | 57.4 | 14 | 0.58 | 14 | 0 |
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| 2023 | 72.7 | 32 | 87 | 71 | 58.4 | 7 | 0.20 | 37 | 0 |
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| 2022 | 76.9 | 2 | 91.9 | 20 | 61.9 | 1 | 0.09 | 55 | 0 |
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| 2021 | 70.1 | 76 | 84.7 | 97 | 55.6 | 34 | 0.02 | 75 | 0 |
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| 2020 | 74.8 | 7 | 90 | 44 | 59.5 | 2 | 0.18 | 41 | 0 |
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| 2019 | 72.8 | 31 | 88.3 | 62 | 57.3 | 15 | 0.28 | 28 | 0 |
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| 2018 | 71.4 | 56 | 86.8 | 74 | 56 | 28 | 0.04 | 68 | 0 |
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| 2017 | 73.7 | 20 | 89.1 | 52 | 58.4 | 7 | 0.02 | 75 | 0 |
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| 2016 | 70.5 | 71 | 86.9 | 73 | 54.1 | 54 | 0.04 | 68 | 0 |
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| 2015 | 71.7 | 52 | 86.4 | 82 | 57 | 17 | 0.96 | 8 | 0 |
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| 2014 | 69.2 | 83 | 81.8 | 104 | 56.6 | 20 | 3.52 | 1 | 0 |
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| 2013 | 74.3 | 14 | 90.3 | 35 | 58.3 | 10 | trace | 82 | 0 |
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| 2012 | 73.6 | 23 | 89.3 | 51 | 58.2 | 11 | trace | 82 | 2 |
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| 2011 | 72.7 | 32 | 89 | 54 | 56.5 | 22 | trace | 82 | 0 |
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| 2010 | 68.6 | 90 | 83.7 | 99 | 53.5 | 60 | 0.08 | 58 | 0 |
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| 2009 | 69.2 | 83 | 84.1 | 98 | 54.4 | 52 | 0.17 | 44 | 0 |
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| 2008 | 70.5 | 71 | 85.8 | 88 | 55.2 | 39 | 0.10 | 53 | 0 |
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| 2007 | 71 | 59 | 86.4 | 82 | 55.6 | 34 | 0.01 | 79 | 0 |
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| 2006 | 68.3 | 95 | 84.8 | 95 | 51.8 | 81 | trace | 82 | 0 |
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| 2005 | 70.6 | 69 | 86.2 | 85 | 55 | 44 | 0.06 | 62 | 0 |
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| 2004 | 68.5 | 91 | 83.7 | 99 | 53.4 | 63 | 0.20 | 37 | 0 |
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| 2003 | 72.1 | 46 | 87.7 | 65 | 56.4 | 27 | 0.40 | 22 | 1 |
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| 2002 | 66.8 | 101 | 82.2 | 103 | 51.3 | 88 | 0.09 | 55 | 0 |
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| 2001 | | | | | | | | | 5 |
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| 2000 | | | | | | | | | 5 |
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| 1999 | 70.8 | 65 | 86.5 | 81 | 55.1 | 41 | 0.18 | 41 | 0 |
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| 1998 | 72.6 | 34 | 88.8 | 56 | 56.5 | 22 | trace | 82 | 0 |
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| 1997 | 73.2 | 27 | 91 | 25 | 55.5 | 37 | 0.03 | 72 | 0 |
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| 1996 | 71.8 | 50 | 90.8 | 27 | 53 | 65 | trace | 82 | 1 |
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| 1995 | 70.8 | 65 | 89.4 | 49 | 52.2 | 76 | trace | 82 | 0 |
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| 1994 | 74.2 | 16 | 92.9 | 12 | 55.6 | 34 | 0.37 | 23 | 0 |
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| 1993 | 66.3 | 103 | 83.2 | 101 | 49.5 | 103 | 0.54 | 16 | 0 |
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| 1992 | 71.6 | 54 | 91 | 25 | 52.6 | 72 | trace | 82 | 1 |
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| 1991 | 74.8 | 7 | 93.1 | 9 | 56.5 | 22 | trace | 82 | 1 |
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| 1990 | 72.1 | 46 | 89.4 | 49 | 54.7 | 48 | 0.13 | 50 | 1 |
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| 1989 | 69 | 87 | 85.2 | 92 | 52.7 | 70 | 0.80 | 11 | 0 |
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| 1988 | 70.9 | 63 | 90.7 | 29 | 51.1 | 91 | trace | 82 | 0 |
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| 1987 | 70.4 | 75 | 89 | 54 | 51.8 | 81 | 0.03 | 72 | 0 |
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| 1986 | 74.5 | 12 | 93.3 | 7 | 55.8 | 31 | 0.05 | 66 | 0 |
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| 1985 | 68.8 | 88 | 86.6 | 77 | 51 | 92 | 0.02 | 75 | 0 |
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| 1984 | 72.9 | 29 | 90.7 | 29 | 55.1 | 41 | 0.36 | 25 | 0 |
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| 1983 | 73.7 | 20 | 90.3 | 35 | 57.1 | 16 | 0.93 | 9 | 0 |
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| 1982 | 72.2 | 44 | 90 | 44 | 54.3 | 53 | 0.21 | 33 | 0 |
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| 1981 | 75 | 6 | 94.1 | 3 | 55.9 | 29 | trace | 82 | 0 |
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| 1980 | 68.2 | 96 | 85.8 | 88 | 50.5 | 96 | 0.21 | 33 | 1 |
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| 1979 | 70.7 | 68 | 87.3 | 68 | 54 | 56 | 1.18 | 3 | 0 |
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| 1978 | 68.4 | 93 | 86.6 | 77 | 49.8 | 101 | 0.48 | 18 | 2 |
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| 1977 | 71.9 | 48 | 89.1 | 52 | 54.8 | 46 | 0.54 | 16 | 0 |
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| 1976 | 66.8 | 101 | 82.4 | 102 | 51.2 | 89 | 1.03 | 6 | 0 |
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| 1975 | 67.4 | 100 | 84.8 | 95 | 50 | 100 | 0.15 | 46 | 0 |
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| 1974 | 71.2 | 58 | 88.7 | 57 | 53.7 | 59 | 0.14 | 49 | 0 |
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| 1973 | 73 | 28 | 90.1 | 42 | 55.9 | 29 | 0.37 | 23 | 0 |
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| 1972 | 73.8 | 19 | 91.1 | 24 | 56.5 | 22 | 0.15 | 46 | 0 |
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| 1971 | 76.5 | 3 | 93.5 | 6 | 59.4 | 3 | 0.09 | 55 | 0 |
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| 1970 | 74.8 | 7 | 93 | 11 | 56.7 | 19 | 0.47 | 19 | 0 |
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| 1969 | 74.5 | 12 | 94.3 | 2 | 54.7 | 48 | 0.00 | 104 | 0 |
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| 1968 | 66.1 | 104 | 80.8 | 106 | 51.5 | 85 | 3.39 | 2 | 0 |
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| 1967 | 77.3 | 1 | 96.4 | 1 | 58.1 | 12 | trace | 82 | 0 |
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| 1966 | 72.4 | 40 | 90.8 | 27 | 54.1 | 54 | trace | 82 | 0 |
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| 1965 | 69.2 | 83 | 84.9 | 94 | 53.5 | 60 | 1.02 | 7 | 0 |
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| 1964 | 69.2 | 83 | 86.6 | 77 | 51.7 | 84 | 0.02 | 75 | 0 |
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| 1963 | 72.6 | 34 | 90.2 | 38 | 55 | 44 | 0.21 | 33 | 0 |
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| 1962 | 68.4 | 93 | 85 | 93 | 51.8 | 81 | 0.35 | 26 | 0 |
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| 1961 | 75.9 | 4 | 92.8 | 13 | 59 | 5 | 0.18 | 41 | 0 |
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| 1960 | 68.1 | 98 | 85.8 | 88 | 50.5 | 96 | 0.84 | 10 | 0 |
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| 1959 | 68.8 | 88 | 86.8 | 74 | 50.8 | 93 | 0.29 | 27 | 0 |
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| 1958 | 74.3 | 14 | 92.1 | 16 | 56.6 | 20 | 0.07 | 60 | 0 |
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| 1957 | 71 | 59 | 89.7 | 48 | 52.2 | 76 | 0.20 | 37 | 0 |
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| 1956 | 68.5 | 91 | 86.8 | 74 | 50.3 | 98 | 0.00 | 104 | 0 |
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| 1955 | 74 | 18 | 93.3 | 7 | 54.8 | 46 | trace | 82 | 1 |
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| 1954 | 67.9 | 99 | 86.6 | 77 | 49.2 | 105 | 0.10 | 53 | 0 |
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| 1953 | 70.5 | 71 | 88.6 | 59 | 52.4 | 74 | 0.01 | 79 | 0 |
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| 1952 | 70.8 | 65 | 90.1 | 42 | 51.5 | 85 | trace | 82 | 0 |
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| 1951 | 69.7 | 79 | 86.3 | 84 | 53.3 | 64 | 0.21 | 33 | 1 |
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| 1950 | | | | | | | 0.16 | 45 | 16 |
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| 1949 | 71.8 | 50 | 91.7 | 22 | 52.1 | 78 | 0.19 | 40 | 2 |
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| 1948 | 69.7 | 79 | 90 | 44 | 49.5 | 103 | trace | 82 | 0 |
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| 1947 | 71 | 59 | 89.8 | 47 | 52.1 | 78 | 0.08 | 58 | 0 |
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| 1946 | 72.6 | 34 | 90.7 | 29 | 54.5 | 50 | trace | 82 | 0 |
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| 1945 | 72.5 | 38 | 91.9 | 20 | 53 | 65 | 0.04 | 68 | 0 |
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| 1944 | 69.5 | 82 | 88.6 | 59 | 50.3 | 98 | 0.06 | 62 | 0 |
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| 1943 | 70 | 78 | 90.2 | 38 | 49.7 | 102 | trace | 82 | 0 |
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| 1942 | 72.5 | 38 | 92.1 | 16 | 52.8 | 69 | 0.00 | 104 | 0 |
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| 1941 | 71.9 | 48 | 88.4 | 61 | 55.5 | 37 | 0.73 | 12 | 0 |
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| 1940 | 73.6 | 23 | 93.9 | 4 | 53.5 | 60 | trace | 82 | 1 |
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| 1939 | 73.5 | 26 | 92.3 | 15 | 54.5 | 50 | 0.01 | 79 | 1 |
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| 1938 | 72.3 | 41 | 90.5 | 33 | 54 | 56 | 0.44 | 20 | 0 |
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| 1937 | 71.3 | 57 | 91.4 | 23 | 51.2 | 89 | 0.00 | 104 | 0 |
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| 1936 | 72.6 | 34 | 90.2 | 38 | 55.1 | 41 | 0.73 | 12 | 0 |
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| 1935 | 72.3 | 41 | 92 | 18 | 52.6 | 72 | trace | 82 | 0 |
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| 1934 | 74.7 | 10 | 93.7 | 5 | 55.7 | 33 | 0.06 | 62 | 0 |
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| 1933 | 71.5 | 55 | 90.2 | 38 | 52.7 | 70 | 0.03 | 72 | 0 |
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| 1932 | | | | | 50.6 | 95 | 0.22 | 32 | 4 |
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| 1931 | 73.7 | 20 | 92 | 18 | 55.2 | 39 | 0.04 | 68 | 1 |
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| 1930 | 74.6 | 11 | 90.5 | 33 | 58.7 | 6 | 0.55 | 15 | 0 |
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| 1929 | 75.4 | 5 | 93.1 | 9 | 57.7 | 13 | 0.12 | 51 | 0 |
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| 1928 | 70.1 | 76 | 88 | 64 | 52 | 80 | 0.11 | 52 | 1 |
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| 1927 | 70.6 | 69 | 88.1 | 63 | 53 | 65 | 0.05 | 66 | 0 |
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| 1926 | 73.6 | 23 | 90.3 | 35 | 56.8 | 18 | 0.15 | 46 | 0 |
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| 1925 | 69.7 | 79 | 87.1 | 70 | 52.3 | 75 | 1.17 | 4 | 0 |
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| 1924 | 71 | 59 | 90.7 | 29 | 51.4 | 87 | 0.00 | 104 | 0 |
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| 1923 | | | 87.6 | 66 | | | 0.27 | 31 | 29 |
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| 1922 | 71.7 | 52 | 87 | 71 | 56.5 | 22 | 1.07 | 5 | 0 |
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| 1921 | 70.9 | 63 | 86 | 86 | 55.8 | 31 | 0.06 | 62 | 0 |
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| 1920 | 70.5 | 71 | 87.4 | 67 | 53.9 | 58 | 0.28 | 28 | 1 |
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| 1919 | 72.9 | 29 | 92.8 | 13 | 53 | 65 | trace | 82 | 2 |
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| 1918 | | | 81.4 | 105 | | | 0.42 | 21 | 4 |
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| 1916 | 68.2 | 96 | 85.7 | 91 | 50.7 | 94 | trace | 82 | 0 |
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