Casper May 20 Weather Records

Daily averages and all-time records for weather in Casper, Wyoming for the date of May 20.
May 20 All-Time Records
1900–2024
Highest temperature 89 °F 1964
Lowest temperature 24 °F 2003
Lowest daily high 32 °F 1975
Highest daily low 56 °F 1992
Most precipitation 0.81 inches 1975
Most snow 8.4 inches 1975
May 20 Average Weather
1991–2020 1
Average high 68.7 °F
Average low 39.0 °F
Chance precipitation 35.9%
Chance snow 3.8%
Casper May 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 77 37 0.00 0.0
2022 44 30 0.06 0.0
2021 83 40 0.00 0.0
2020 78 46 0.00 0.0
2019 51 32 0.12 0.4
2018 66 37 0.00 0.0
2017 61 28 0.00 0.0
2016 76 46 0.00 0.0
2015 45 31 0.01 0.3
2014 70 45 0.00 0.0
2013 54 43 0.21 0.0
2012 75 38 0.00 0.0
2011 50 34 0.16 0.0
2010 71 44 0.00 0.0
2009 78 48 0.00 0.0
2008 82 35 0.00 0.0
2007 84 49 0.00 0.0
2006 83 47 0.04 0.0
2005 87 43 0.00 0.0
2004 61 45 0.47 0.0
2003 64 24 0.00 0.0
2002 76 40 0.00 0.0
2001 56 28 0.09 1.8
2000 66 42 0.03 0.0
1999 67 38 0.00 0.0
1998 82 47 0.00 n/a
1997 80 29 0.00 n/a
1996 64 30 0.00 n/a
1995 66 43 0.05 0.0
1994 74 47 0.00 0.0
1993 81 42 0.02 0.0
1992 81 56 0.21 0.0
1991 82 50 0.01 0.0
1990 66 37 0.00 0.0
1989 73 31 0.00 0.0
1988 62 36 0.00 0.0
1987 55 32 0.22 0.0
1986 83 41 0.00 0.0
1985 71 36 0.00 0.0
1984 83 52 0.07 0.0
1983 60 30 0.00 0.0
1982 56 40 0.27 0.0
1981 65 43 0.29 0.0
1980 77 43 0.00 0.0
1979 63 39 0.00 0.0
1978 68 33 0.00 0.0
1977 60 37 0.02 0.0
1976 75 48 0.00 0.0
1975 32 31 0.81 8.4
1974 57 36 0.00 0.0
1973 79 52 0.03 0.0
1972 75 46 0.00 0.0
1971 64 35 0.00 0.0
1970 80 46 0.00 0.0
1969 63 40 0.01 0.0
1968 64 29 0.00 0.0
1967 68 33 0.00 0.0
1966 77 34 0.00 0.0
1965 73 47 0.00 0.0
1964 89 55 0.00 0.0
1963 60 34 0.00 0.0
1962 71 49 0.00 0.0
1961 67 45 0.02 0.0
1960 70 30 0.00 0.0
1959 52 34 0.01 0.0
1958 84 51 0.00 0.0
1957 60 40 0.03 0.0
1956 79 51 0.00 0.0
1955 81 44 0.00 0.0
1954 89 55 0.00 0.0
1953 67 39 0.00 0.0
1952 66 45 0.00 0.0
1951 62 48 0.08 0.0
1950 62 35 0.07 0.0
1949 61 39 0.01 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 71 38 0.00 0.0
1938 59 32 0.00 0.0
1937 64 42 0.00 0.0
1936 75 53 0.00 0.0
1935 45 32 0.45 0.0
1934 88 48 0.00 0.0
1933 70 44 0.00 n/a
1932 74 52 0.00 0.0
1931 48 24 n/a n/a
1930 79 50 n/a n/a
1929 77 37 n/a n/a
1928 63 46 0.20 0.0
1927 71 48 0.14 n/a
1926 77 39 n/a n/a
1925 84 48 n/a n/a
1924 65 42 0.06 n/a
1923 69 44 0.02 n/a
1922 71 53 0.00 n/a
1921 74 47 0.00 n/a
1920 71 39 0.00 n/a
1919 n/a n/a n/a n/a
1918 74 34 0.00 n/a
1917 54 43 0.53 n/a
1916 48 42 0.06 n/a
1915 n/a n/a n/a n/a
1914 77 48 0.02 0.0
1913 n/a n/a n/a n/a
1912 84 40 0.00 n/a
1911 56 34 0.60 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 79 53 0.31 n/a
What's the all-time high for Casper on 5/20?
For the date of May 20, the highest temperature ever reached in Casper history is 89 °F which has happened 2 times, most recently in 1964.
Highest Temperatures in Casper on May 20
Rank Temperature Year
1 89 °F 1954
1 89 °F 1964
3 88 °F 1934
4 87 °F 2005
5 84 °F 1912
5 84 °F 1958
5 84 °F 1925
5 84 °F 2007
9 83 °F 1986
9 83 °F 2021
9 83 °F 1984
9 83 °F 2006
What's the all-time low for Casper on 5/20?
For the date of May 20, the lowest temperature ever reached in Casper history is 24 °F which has happened 2 times, most recently in 2003.
Lowest Temperatures in Casper on May 20
Rank Temperature Year
1 24 °F 1931
1 24 °F 2003
3 28 °F 2017
3 28 °F 2001
5 29 °F 1997
5 29 °F 1968
7 30 °F 1983
7 30 °F 1960
7 30 °F 2022
7 30 °F 1996
Lowest High Temperatures in Casper on May 20
Rank Temperature Year
1 32 °F 1975
2 44 °F 2022
3 45 °F 2015
3 45 °F 1935
5 48 °F 1931
5 48 °F 1916
7 50 °F 2011
8 51 °F 2019
9 52 °F 1959
10 54 °F 1917
10 54 °F 2013
What's the most it has ever rained in Casper on 5/20?
For the date of May 20, the most precipitation ever recorded in Casper history is 0.81 inches which happened in 1975.
All-Time Most Precipitation in Casper on May 20
Rank Precipitation Year
1 0.81 inches 1975
2 0.60 inches 1911
3 0.53 inches 1917
4 0.47 inches 2004
5 0.45 inches 1935
6 0.31 inches 1901
7 0.29 inches 1981
8 0.27 inches 1982
9 0.22 inches 1987
10 0.21 inches 2013
10 0.21 inches 1992
All-Time Most Snow in Casper on May 20
Rank Precipitation Year
1 8.4 inches 1975
2 1.8 inches 2001
3 0.4 inches 2019
4 0.3 inches 2015
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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