Every September in Mcgrath, AK from 1940 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 | 46.3 | 23 | 53.3 | 43 | 39.2 | 15 | 3.26 | 23 | 0 |
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| 2025 | 45.1 | 40 | 52.2 | 49 | 38 | 24 | 2.16 | 42 | 3 |
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| 2024 | 45.5 | 35 | 53.9 | 37 | 37 | 30 | 2.35 | 39 | 0 |
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| 2023 | 43.2 | 58 | 50.9 | 58 | 35.5 | 51 | 1.78 | 54 | 0 |
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| 2022 | 47.3 | 15 | 54.1 | 32 | 40.4 | 6 | 2.82 | 34 | 0 |
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| 2021 | | | | | | | | | 19 |
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| 2020 | 45.7 | 32 | 54.1 | 32 | 37.3 | 27 | 3.02 | 27 | 0 |
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| 2019 | 47.5 | 13 | 54.7 | 26 | 40.3 | 7 | 3.10 | 26 | 0 |
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| 2018 | 49.2 | 4 | 57.9 | 7 | 40.6 | 5 | 1.92 | 48 | 0 |
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| 2017 | 47.4 | 14 | 54.5 | 28 | 40.2 | 8 | 1.65 | 56 | 0 |
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| 2016 | 46.6 | 21 | 54.5 | 28 | 38.8 | 19 | 5.08 | 5 | 0 |
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| 2015 | 43.6 | 53 | 50.1 | 66 | 37.1 | 28 | 2.88 | 33 | 0 |
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| 2014 | 45.8 | 30 | 55.6 | 18 | 36 | 43 | 0.92 | 73 | 0 |
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| 2013 | 42.2 | 70 | 48.4 | 80 | 35.9 | 44 | 4.15 | 10 | 0 |
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| 2012 | 43.2 | 58 | 51.1 | 55 | 35.2 | 55 | 5.14 | 4 | 0 |
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| 2011 | 47.6 | 12 | 56.8 | 12 | 38.4 | 22 | 0.97 | 72 | 0 |
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| 2010 | 46.7 | 20 | 58.3 | 6 | 35.2 | 55 | 1.72 | 55 | 0 |
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| 2009 | 46.9 | 16 | 56.1 | 15 | 37.7 | 26 | 2.21 | 40 | 0 |
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| 2008 | 46.5 | 22 | 55 | 24 | 38 | 24 | 1.49 | 59 | 0 |
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| 2007 | 48.3 | 8 | 55.1 | 23 | 41.5 | 3 | 3.84 | 12 | 0 |
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| 2006 | 48.6 | 6 | 58.9 | 3 | 38.3 | 23 | 0.67 | 79 | 0 |
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| 2005 | 47.7 | 11 | 53.2 | 44 | 42.3 | 1 | 5.28 | 3 | 0 |
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| 2004 | 39.9 | 81 | 49.1 | 75 | 30.7 | 83 | 2.79 | 35 | 0 |
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| 2003 | 41.8 | 72 | 52 | 50 | 31.5 | 82 | 1.43 | 60 | 0 |
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| 2002 | 46.8 | 19 | 53.9 | 37 | 39.7 | 13 | 2.96 | 31 | 0 |
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| 2001 | 46.9 | 16 | 57.8 | 8 | 36.1 | 41 | 0.90 | 75 | 0 |
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| 2000 | 41.6 | 73 | 49.6 | 73 | 33.5 | 68 | 3.28 | 22 | 0 |
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| 1999 | 45.8 | 30 | 55.5 | 20 | 36.1 | 41 | 1.81 | 52 | 0 |
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| 1998 | 46.3 | 23 | 53.9 | 37 | 38.7 | 20 | 3.48 | 16 | 0 |
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| 1997 | 49.4 | 2 | 59.6 | 2 | 39.1 | 17 | 1.40 | 61 | 0 |
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| 1996 | 40.9 | 76 | 50 | 67 | 31.8 | 79 | 1.26 | 64 | 0 |
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| 1995 | 49.7 | 1 | 58.4 | 5 | 40.9 | 4 | 1.21 | 67 | 0 |
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| 1994 | 44.1 | 50 | 53.8 | 40 | 34.4 | 60 | 1.04 | 70 | 0 |
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| 1993 | 42.7 | 64 | 49.2 | 74 | 36.3 | 38 | 6.18 | 1 | 0 |
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| 1992 | 33.6 | 85 | 40.8 | 85 | 26.4 | 85 | 2.45 | 38 | 0 |
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| 1991 | 48.9 | 5 | 57.8 | 8 | 40 | 10 | 1.25 | 65 | 0 |
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| 1990 | 42.6 | 65 | 49.7 | 70 | 35.5 | 51 | 3.19 | 24 | 0 |
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| 1989 | 46.9 | 16 | 54.1 | 32 | 39.7 | 13 | 3.32 | 19 | 0 |
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| 1988 | 43.7 | 51 | 54.1 | 32 | 33.2 | 70 | 0.84 | 76 | 0 |
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| 1987 | 42.4 | 68 | 51 | 57 | 33.7 | 66 | 3.34 | 18 | 0 |
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| 1986 | 45.2 | 37 | 50.5 | 60 | 39.9 | 11 | 3.29 | 21 | 0 |
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| 1985 | 42.8 | 62 | 48.9 | 78 | 36.8 | 33 | 5.56 | 2 | 0 |
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| 1984 | 44.4 | 44 | 56.1 | 15 | 32.7 | 74 | 0.57 | 80 | 0 |
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| 1983 | 39.7 | 83 | 47.8 | 81 | 31.6 | 81 | 2.05 | 45 | 0 |
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| 1982 | 45.2 | 37 | 51.4 | 53 | 39 | 18 | 5.00 | 6 | 0 |
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| 1981 | 41.3 | 75 | 49.7 | 70 | 32.9 | 72 | 0.71 | 77 | 0 |
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| 1980 | 42.3 | 69 | 50.4 | 63 | 34.2 | 64 | 1.32 | 62 | 0 |
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| 1979 | 46.3 | 23 | 56.6 | 13 | 35.9 | 44 | 1.82 | 51 | 0 |
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| 1978 | 45.3 | 36 | 54.1 | 32 | 36.4 | 37 | 1.19 | 68 | 0 |
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| 1977 | 46.3 | 23 | 52.8 | 47 | 39.8 | 12 | 4.72 | 8 | 0 |
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| 1976 | 44.2 | 48 | 55.3 | 22 | 33.1 | 71 | 0.50 | 81 | 0 |
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| 1975 | 42.5 | 66 | 49.1 | 75 | 35.8 | 46 | 3.14 | 25 | 0 |
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| 1974 | 49.4 | 2 | 60.2 | 1 | 38.6 | 21 | 1.06 | 69 | 0 |
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| 1973 | 45.6 | 33 | 55.6 | 18 | 35.5 | 51 | 1.61 | 57 | 0 |
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| 1972 | 43 | 60 | 51.5 | 52 | 34.4 | 60 | 2.53 | 37 | 0 |
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| 1971 | 44.8 | 42 | 53.1 | 46 | 36.5 | 36 | 1.61 | 57 | 0 |
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| 1970 | 39.6 | 84 | 47.2 | 84 | 32 | 78 | 0.92 | 73 | 0 |
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| 1969 | 45.9 | 29 | 58.9 | 3 | 32.9 | 72 | 0.19 | 86 | 0 |
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| 1968 | 40.3 | 80 | 51.1 | 55 | 29.5 | 84 | 0.45 | 83 | 0 |
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| 1967 | 45.1 | 40 | 54.5 | 28 | 35.7 | 47 | 0.26 | 85 | 0 |
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| 1966 | 45.6 | 33 | 54.8 | 25 | 36.3 | 38 | 0.48 | 82 | 0 |
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| 1965 | 48.1 | 9 | 54.4 | 31 | 41.7 | 2 | 3.57 | 15 | 0 |
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| 1964 | 45.2 | 37 | 54.7 | 26 | 35.7 | 47 | 0.69 | 78 | 0 |
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| 1963 | 46.1 | 28 | 57.1 | 10 | 35 | 57 | 0.34 | 84 | 0 |
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| 1962 | 40.8 | 77 | 49.7 | 70 | 31.8 | 79 | 1.23 | 66 | 0 |
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| 1961 | 44.2 | 48 | 51.3 | 54 | 37.1 | 28 | 3.78 | 13 | 0 |
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| 1960 | 40.7 | 78 | 47.7 | 82 | 33.7 | 66 | 4.81 | 7 | 0 |
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| 1959 | 43.5 | 55 | 53.7 | 41 | 33.4 | 69 | 1.86 | 49 | 0 |
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| 1958 | 41.6 | 73 | 48.6 | 79 | 34.7 | 59 | 2.95 | 32 | 0 |
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| 1957 | 43.7 | 51 | 53.2 | 44 | 34.2 | 64 | 2.17 | 41 | 0 |
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| 1956 | 42.5 | 66 | 50.5 | 60 | 34.4 | 60 | 4.27 | 9 | 0 |
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| 1955 | 43.3 | 56 | 49.9 | 68 | 36.7 | 34 | 3.32 | 19 | 0 |
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| 1954 | 42.8 | 62 | 50.5 | 60 | 35 | 57 | 3.59 | 14 | 0 |
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| 1953 | 44.7 | 43 | 53.7 | 41 | 35.6 | 49 | 1.86 | 49 | 0 |
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| 1952 | 42.2 | 70 | 49.9 | 68 | 34.4 | 60 | 1.97 | 46 | 0 |
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| 1951 | 44.3 | 46 | 52.3 | 48 | 36.3 | 38 | 2.99 | 28 | 0 |
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| 1950 | 46.2 | 27 | 55.4 | 21 | 37 | 30 | 2.13 | 43 | 0 |
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| 1949 | 47.9 | 10 | 56.5 | 14 | 39.2 | 15 | 1.29 | 63 | 0 |
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| 1948 | 39.9 | 81 | 47.5 | 83 | 32.3 | 76 | 2.97 | 29 | 0 |
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| 1947 | 40.6 | 79 | 49 | 77 | 32.3 | 76 | 2.79 | 35 | 0 |
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| 1946 | 43.3 | 56 | 50.9 | 58 | 35.6 | 49 | 1.95 | 47 | 0 |
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| 1945 | 44.4 | 44 | 52 | 50 | 36.7 | 34 | 3.38 | 17 | 0 |
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| 1944 | 43 | 60 | 50.4 | 63 | 35.5 | 51 | 2.11 | 44 | 0 |
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| 1943 | 43.6 | 53 | 50.3 | 65 | 37 | 30 | 1.80 | 53 | 0 |
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| 1942 | 48.5 | 7 | 56.9 | 11 | 40.2 | 8 | 2.97 | 29 | 0 |
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| 1941 | 44.3 | 46 | 55.9 | 17 | 32.7 | 74 | 0.98 | 71 | 0 |
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| 1940 | | | | | | | 4.00 | 11 | 30 |
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