Casper May 18 Weather Records

Daily averages and all-time records for weather in Casper, Wyoming for the date of May 18.
May 18 All-Time Records
1900–2024
Highest temperature 93 °F 1912
Lowest temperature 28 °F 1966
Lowest daily high 42 °F 1978
Highest daily low 53 °F 2007
Most precipitation 1.19 inches 1978
Most snow 5.4 inches 1978
May 18 Average Weather
1991–2020 1
Average high 68.0 °F
Average low 38.4 °F
Chance precipitation 36.1%
Chance snow 4.5%
Casper May 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 61 40 0.22 0.0
2022 78 37 0.00 0.0
2021 78 46 0.00 0.0
2020 86 44 0.00 0.0
2019 46 30 0.51 0.1
2018 68 37 0.29 0.0
2017 44 32 1.06 2.8
2016 68 30 0.00 0.0
2015 51 37 0.00 0.0
2014 78 34 0.00 0.0
2013 70 40 0.05 0.0
2012 71 45 0.25 0.0
2011 52 35 0.32 0.0
2010 73 40 0.24 0.0
2009 88 37 0.00 0.0
2008 80 42 0.00 0.0
2007 82 53 0.00 0.0
2006 87 47 0.00 0.0
2005 73 36 0.00 0.0
2004 80 42 0.01 0.0
2003 74 34 0.00 0.0
2002 71 39 0.00 0.0
2001 76 52 0.00 0.0
2000 58 38 0.00 0.0
1999 74 37 0.00 0.0
1998 74 35 0.00 n/a
1997 56 37 0.01 n/a
1996 71 45 0.00 n/a
1995 70 42 0.10 0.0
1994 81 43 0.00 0.0
1993 73 44 0.00 0.0
1992 88 50 0.00 0.0
1991 77 46 0.00 0.0
1990 75 38 0.00 0.0
1989 81 42 0.00 0.0
1988 57 43 0.10 0.0
1987 75 50 0.00 0.0
1986 70 34 0.00 0.0
1985 65 39 0.00 0.0
1984 72 39 0.00 0.0
1983 61 32 0.02 0.0
1982 76 38 0.02 0.0
1981 53 34 0.00 0.0
1980 67 30 0.00 0.0
1979 71 42 0.00 0.0
1978 42 33 1.19 5.4
1977 56 41 0.20 0.0
1976 85 43 0.00 0.0
1975 79 46 0.00 0.0
1974 79 33 0.00 0.0
1973 83 44 0.00 0.0
1972 79 48 0.00 0.0
1971 46 30 0.03 0.4
1970 79 41 0.00 0.0
1969 78 36 0.01 0.0
1968 53 29 0.00 0.0
1967 68 45 0.00 0.0
1966 56 28 0.00 0.0
1965 64 36 0.00 0.0
1964 76 49 0.00 0.0
1963 66 38 0.10 0.0
1962 58 44 0.17 0.0
1961 66 39 0.02 0.0
1960 54 33 0.06 0.0
1959 67 42 0.00 0.0
1958 73 40 0.00 0.0
1957 67 39 0.02 0.0
1956 79 47 0.00 0.0
1955 65 37 0.00 0.0
1954 80 43 0.00 0.0
1953 64 42 0.00 0.0
1952 60 33 0.00 0.0
1951 69 42 0.00 0.0
1950 66 36 0.00 0.0
1949 48 36 0.16 0.0
1948 n/a n/a n/a n/a
1947 n/a n/a n/a n/a
1946 n/a n/a n/a n/a
1945 n/a n/a n/a n/a
1944 n/a n/a n/a n/a
1943 n/a n/a n/a n/a
1942 n/a n/a n/a n/a
1941 n/a n/a n/a n/a
1940 n/a n/a n/a n/a
1939 78 49 0.12 0.0
1938 71 44 0.15 0.0
1937 90 50 0.00 0.0
1936 79 39 0.00 0.0
1935 67 40 0.12 0.0
1934 89 42 0.00 0.0
1933 72 41 0.00 n/a
1932 84 43 0.00 0.0
1931 54 33 0.12 1.2
1930 67 29 n/a n/a
1929 69 43 n/a n/a
1928 70 42 0.25 0.0
1927 81 39 n/a n/a
1926 61 37 0.09 n/a
1925 76 43 n/a n/a
1924 75 35 n/a n/a
1923 69 44 n/a n/a
1922 71 38 0.00 n/a
1921 63 46 0.04 n/a
1920 76 42 0.00 n/a
1919 n/a n/a n/a n/a
1918 70 38 0.00 n/a
1917 72 36 0.00 n/a
1916 54 34 0.05 n/a
1915 n/a n/a n/a n/a
1914 58 39 0.00 0.0
1913 n/a n/a n/a n/a
1912 93 44 0.00 n/a
1911 68 42 0.00 n/a
1910 n/a n/a n/a n/a
1909 n/a n/a n/a n/a
1908 n/a n/a n/a n/a
1907 n/a n/a n/a n/a
1906 n/a n/a n/a n/a
1905 n/a n/a n/a n/a
1904 n/a n/a n/a n/a
1903 n/a n/a n/a n/a
1902 n/a n/a n/a n/a
1901 84 47 0.00 n/a
What's the all-time high for Casper on 5/18?
For the date of May 18, the highest temperature ever reached in Casper history is 93 °F which happened in 1912.
Highest Temperatures in Casper on May 18
Rank Temperature Year
1 93 °F 1912
2 90 °F 1937
3 89 °F 1934
4 88 °F 2009
4 88 °F 1992
6 87 °F 2006
7 86 °F 2020
8 85 °F 1976
9 84 °F 1932
9 84 °F 1901
What's the all-time low for Casper on 5/18?
For the date of May 18, the lowest temperature ever reached in Casper history is 28 °F which happened in 1966.
Lowest Temperatures in Casper on May 18
Rank Temperature Year
1 28 °F 1966
2 29 °F 1930
2 29 °F 1968
4 30 °F 1971
4 30 °F 2019
4 30 °F 2016
4 30 °F 1980
8 32 °F 2017
8 32 °F 1983
10 33 °F 1974
10 33 °F 1931
10 33 °F 1960
10 33 °F 1978
10 33 °F 1952
Lowest High Temperatures in Casper on May 18
Rank Temperature Year
1 42 °F 1978
2 44 °F 2017
3 46 °F 1971
3 46 °F 2019
5 48 °F 1949
6 51 °F 2015
7 52 °F 2011
8 53 °F 1968
8 53 °F 1981
10 54 °F 1916
10 54 °F 1931
10 54 °F 1960
What's the most it has ever rained in Casper on 5/18?
For the date of May 18, the most precipitation ever recorded in Casper history is 1.19 inches which happened in 1978.
All-Time Most Precipitation in Casper on May 18
Rank Precipitation Year
1 1.19 inches 1978
2 1.06 inches 2017
3 0.51 inches 2019
4 0.32 inches 2011
5 0.29 inches 2018
6 0.25 inches 2012
6 0.25 inches 1928
8 0.24 inches 2010
9 0.22 inches 2023
10 0.20 inches 1977
All-Time Most Snow in Casper on May 18
Rank Precipitation Year
1 5.4 inches 1978
2 2.8 inches 2017
3 1.2 inches 1931
4 0.4 inches 1971
5 0.1 inches 2019
Weather Station Details
Years Station Coordinates
1949–2024 Casper-Natrona County International Airport location
1900–1948 Casper 2 E location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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