Every March in Casper, WY 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 | 45.9 | 1 | 62.4 | 1 | 29.4 | 2 | 0.16 | 85 | 0 |
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| 2025 | 37.4 | 16 | 51.3 | 13 | 23.4 | 31 | 1.33 | 19 | 0 |
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| 2024 | 36 | 33 | 48.7 | 31 | 23.3 | 33 | 0.57 | 58 | 0 |
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| 2023 | 26.7 | 80 | 37.5 | 81 | 15.9 | 79 | 0.65 | 53 | 0 |
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| 2022 | 33 | 54 | 46.6 | 45 | 19.5 | 66 | 1.54 | 12 | 0 |
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| 2021 | 32.2 | 59 | 44.5 | 53 | 19.8 | 63 | 2.83 | 1 | 0 |
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| 2020 | 36 | 33 | 47.4 | 40 | 24.5 | 22 | 0.96 | 35 | 0 |
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| 2019 | 29.8 | 73 | 41.4 | 72 | 18.2 | 72 | 1.74 | 7 | 0 |
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| 2018 | 35.5 | 37 | 49.1 | 28 | 21.8 | 50 | 1.00 | 31 | 0 |
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| 2017 | 41.8 | 4 | 53.7 | 7 | 29.8 | 1 | 1.79 | 6 | 0 |
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| 2016 | 37.2 | 18 | 50.8 | 15 | 23.6 | 28 | 1.36 | 17 | 0 |
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| 2015 | 39.9 | 8 | 54.7 | 5 | 25.1 | 16 | 0.64 | 54 | 0 |
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| 2014 | 35.4 | 38 | 47 | 43 | 23.7 | 27 | 1.64 | 8 | 0 |
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| 2013 | 33.8 | 48 | 48.1 | 37 | 19.5 | 66 | 0.85 | 43 | 0 |
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| 2012 | 44.1 | 2 | 58.7 | 2 | 29.4 | 2 | 0.33 | 81 | 0 |
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| 2011 | 37.1 | 20 | 49.2 | 25 | 24.9 | 17 | 0.46 | 72 | 0 |
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| 2010 | 38 | 13 | 49.3 | 24 | 26.7 | 10 | 1.57 | 10 | 0 |
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| 2009 | 33.2 | 50 | 47.7 | 38 | 18.6 | 70 | 1.00 | 31 | 0 |
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| 2008 | 32.3 | 58 | 43.9 | 56 | 20.6 | 59 | 0.69 | 49 | 0 |
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| 2007 | 40.6 | 6 | 55.2 | 4 | 25.9 | 12 | 1.36 | 17 | 0 |
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| 2006 | 34.2 | 46 | 46.8 | 44 | 21.5 | 53 | 0.76 | 46 | 0 |
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| 2005 | 36 | 33 | 49.5 | 22 | 22.5 | 42 | 0.83 | 44 | 0 |
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| 2004 | 37.4 | 16 | 52.7 | 10 | 22 | 48 | 0.12 | 87 | 0 |
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| 2003 | 35.3 | 40 | 47.6 | 39 | 23.1 | 39 | 0.97 | 34 | 0 |
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| 2002 | 25.7 | 85 | 38.7 | 79 | 12.8 | 85 | 0.64 | 54 | 0 |
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| 2001 | 35.1 | 42 | 47.3 | 42 | 23 | 40 | 0.18 | 84 | 0 |
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| 2000 | 36.8 | 24 | 49.8 | 18 | 23.8 | 26 | 0.58 | 57 | 0 |
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| 1999 | 37.6 | 15 | 53.1 | 9 | 22.2 | 44 | 0.45 | 73 | 0 |
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| 1998 | 31.8 | 63 | 43.6 | 59 | 19.9 | 62 | 0.52 | 63 | 0 |
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| 1997 | 36.9 | 22 | 50.5 | 16 | 23.4 | 31 | 0.92 | 38 | 0 |
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| 1996 | 30.7 | 70 | 43.6 | 59 | 17.9 | 73 | 0.56 | 60 | 0 |
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| 1995 | 36.9 | 22 | 49.2 | 25 | 24.6 | 20 | 0.50 | 68 | 0 |
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| 1994 | 41.5 | 5 | 54.5 | 6 | 28.4 | 5 | 0.57 | 58 | 0 |
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| 1993 | 38.3 | 11 | 48.7 | 31 | 27.9 | 6 | 0.52 | 63 | 0 |
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| 1992 | 40.6 | 6 | 53.5 | 8 | 27.8 | 7 | 1.27 | 23 | 0 |
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| 1991 | 36.5 | 27 | 49.6 | 19 | 23.3 | 33 | 0.45 | 73 | 0 |
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| 1990 | 35.3 | 40 | 48.5 | 33 | 22.2 | 44 | 1.13 | 28 | 0 |
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| 1989 | 35.6 | 36 | 49.1 | 28 | 22.1 | 47 | 0.49 | 70 | 0 |
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| 1988 | 32 | 61 | 42.8 | 63 | 21.2 | 56 | 0.71 | 47 | 0 |
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| 1987 | 32.4 | 57 | 41.7 | 69 | 23 | 40 | 1.43 | 15 | 0 |
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| 1986 | 42.8 | 3 | 56.8 | 3 | 28.8 | 4 | 0.55 | 61 | 0 |
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| 1985 | 33.3 | 49 | 45.3 | 50 | 21.3 | 54 | 0.52 | 63 | 0 |
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| 1984 | 34.4 | 45 | 44.1 | 55 | 24.6 | 20 | 1.59 | 9 | 0 |
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| 1983 | 36.2 | 30 | 46.2 | 46 | 26.3 | 11 | 2.29 | 3 | 0 |
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| 1982 | 36.6 | 26 | 49.9 | 17 | 23.3 | 33 | 0.60 | 56 | 0 |
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| 1981 | 37.9 | 14 | 51.4 | 11 | 24.5 | 22 | 0.77 | 45 | 0 |
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| 1980 | 31 | 68 | 42.1 | 66 | 19.8 | 63 | 1.19 | 24 | 0 |
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| 1979 | 35.4 | 38 | 45.6 | 48 | 25.2 | 14 | 1.31 | 21 | 0 |
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| 1978 | 37.2 | 18 | 49.4 | 23 | 24.9 | 17 | 0.93 | 37 | 0 |
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| 1977 | 31.3 | 67 | 41.7 | 69 | 20.9 | 57 | 1.05 | 30 | 0 |
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| 1976 | 32 | 61 | 45 | 52 | 19 | 69 | 0.50 | 68 | 0 |
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| 1975 | 30.2 | 71 | 40.6 | 74 | 19.8 | 63 | 2.01 | 5 | 0 |
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| 1974 | 36.1 | 32 | 48.8 | 30 | 23.5 | 30 | 0.37 | 78 | 0 |
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| 1973 | 33 | 54 | 42.4 | 65 | 23.6 | 28 | 0.52 | 63 | 0 |
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| 1972 | 38.2 | 12 | 51.4 | 11 | 24.9 | 17 | 1.41 | 16 | 0 |
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| 1971 | 31.6 | 66 | 43.2 | 61 | 20.1 | 61 | 1.17 | 25 | 0 |
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| 1970 | 27.6 | 77 | 39.4 | 76 | 15.8 | 80 | 1.53 | 13 | 0 |
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| 1969 | 28.4 | 75 | 39.8 | 75 | 16.9 | 76 | 1.10 | 29 | 0 |
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| 1968 | 36.7 | 25 | 48.2 | 36 | 25.2 | 14 | 0.92 | 38 | 0 |
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| 1967 | 36.4 | 29 | 49.6 | 19 | 23.2 | 37 | 0.66 | 51 | 0 |
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| 1966 | 36.2 | 30 | 49.2 | 25 | 23.2 | 37 | 0.49 | 70 | 0 |
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| 1965 | 20.4 | 87 | 32.9 | 87 | 8 | 87 | 0.52 | 63 | 0 |
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| 1964 | 25.1 | 86 | 35.6 | 85 | 14.6 | 83 | 0.66 | 51 | 0 |
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| 1963 | 34.8 | 43 | 46.2 | 46 | 23.3 | 33 | 0.35 | 79 | 0 |
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| 1962 | 30.2 | 71 | 41.1 | 73 | 19.4 | 68 | 0.55 | 61 | 0 |
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| 1961 | 37 | 21 | 48.3 | 35 | 25.7 | 13 | 1.16 | 26 | 0 |
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| 1960 | 33.2 | 50 | 45.2 | 51 | 21.3 | 54 | 0.42 | 76 | 0 |
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| 1959 | 32.5 | 56 | 42.6 | 64 | 22.5 | 42 | 1.32 | 20 | 0 |
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| 1958 | 28.4 | 75 | 39.3 | 77 | 17.5 | 74 | 2.27 | 4 | 0 |
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| 1957 | 34.6 | 44 | 47.4 | 40 | 21.9 | 49 | 0.91 | 40 | 0 |
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| 1956 | 33.2 | 50 | 45.6 | 48 | 20.7 | 58 | 0.71 | 47 | 0 |
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| 1955 | 25.8 | 83 | 36.5 | 84 | 15.2 | 82 | 0.99 | 33 | 0 |
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| 1954 | 26.1 | 81 | 37.8 | 80 | 14.5 | 84 | 2.43 | 2 | 0 |
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| 1953 | 36.5 | 27 | 48.5 | 33 | 24.4 | 24 | 0.25 | 83 | 0 |
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| 1952 | 27 | 79 | 37 | 83 | 16.9 | 76 | 1.56 | 11 | 0 |
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| 1951 | 28.7 | 74 | 41.8 | 68 | 15.5 | 81 | 0.44 | 75 | 0 |
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| 1950 | 30.8 | 69 | 43.2 | 61 | 18.5 | 71 | 0.90 | 41 | 0 |
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| 1949 | 33.1 | 53 | 44.5 | 53 | 21.7 | 51 | 0.68 | 50 | 0 |
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| 1948 | 27.4 | 78 | 37.3 | 82 | 17.5 | 74 | 0.40 | 77 | 0 |
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| 1947 | 32.1 | 60 | 43.8 | 58 | 20.4 | 60 | 0.26 | 82 | 0 |
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| 1946 | 39.4 | 9 | 51.3 | 13 | 27.4 | 8 | 0.95 | 36 | 0 |
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| 1945 | 34.1 | 47 | 43.9 | 56 | 24.4 | 24 | 0.88 | 42 | 0 |
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| 1944 | 25.8 | 83 | 35.5 | 86 | 16.1 | 78 | 1.48 | 14 | 0 |
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| 1943 | 25.9 | 82 | 39 | 78 | 12.7 | 86 | 1.16 | 26 | 0 |
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| 1942 | 31.8 | 63 | 41.9 | 67 | 21.6 | 52 | 0.16 | 85 | 0 |
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| 1941 | 31.8 | 63 | 41.5 | 71 | 22.2 | 44 | 1.29 | 22 | 0 |
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| 1940 | 38.5 | 10 | 49.6 | 19 | 27.4 | 8 | 0.35 | 79 | 0 |
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