Casper April 20 Weather Records

Daily averages and all-time records for weather in Casper, Wyoming for the date of April 20.
April 20 All-Time Records
1900–2024
Highest temperature 81 °F 1989
Lowest temperature -2 °F 1966
Lowest daily high 26 °F 1951
Highest daily low 50 °F 1962
Most precipitation 3.50 inches 1933
Most snow 23.5 inches 1933
April 20 Average Weather
1991–2020 1
Average high 57.7 °F
Average low 29.6 °F
Chance precipitation 35.1%
Chance snow 19.0%
Casper April 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2024 48 19 0.00 0.0
2023 45 26 0.00 0.0
2022 60 26 0.00 0.0
2021 33 13 0.00 0.0
2020 61 24 0.00 0.0
2019 77 41 0.00 0.0
2018 49 33 0.16 0.0
2017 61 30 0.00 0.0
2016 62 35 0.00 0.0
2015 55 26 0.00 0.0
2014 71 36 0.00 0.0
2013 55 36 0.02 0.0
2012 69 28 0.00 0.0
2011 52 21 0.00 0.0
2010 68 34 0.00 0.0
2009 69 37 0.00 0.0
2008 66 20 0.00 0.0
2007 61 25 0.00 0.0
2006 61 30 0.00 0.0
2005 42 31 0.25 1.0
2004 57 35 0.01 0.0
2003 58 32 0.00 0.0
2002 30 26 0.06 3.0
2001 54 33 0.10 1.0
2000 63 33 0.00 0.0
1999 67 38 0.13 0.0
1998 54 25 0.08 0.0
1997 67 39 0.00 n/a
1996 45 22 0.00 0.0
1995 48 27 0.04 0.0
1994 79 45 0.07 0.0
1993 44 26 0.03 0.2
1992 56 28 0.00 0.0
1991 58 30 0.00 0.0
1990 75 35 0.00 0.0
1989 81 44 0.00 0.0
1988 70 36 0.00 0.0
1987 42 30 0.01 0.1
1986 58 33 0.00 0.0
1985 50 33 0.00 0.0
1984 41 31 0.03 0.4
1983 66 33 0.00 0.0
1982 37 22 0.00 0.0
1981 64 39 0.00 0.0
1980 81 43 0.00 0.0
1979 58 31 0.02 0.4
1978 60 24 0.00 0.0
1977 58 27 0.00 0.0
1976 60 26 0.00 0.0
1975 56 34 0.10 0.0
1974 36 33 1.82 10.5
1973 39 27 0.43 4.5
1972 44 23 0.00 0.0
1971 43 29 0.32 1.6
1970 44 29 0.04 0.5
1969 62 33 0.00 0.0
1968 51 29 0.05 0.0
1967 47 23 0.04 0.4
1966 33 -2 0.00 0.0
1965 73 41 0.00 0.0
1964 50 36 0.08 0.0
1963 50 26 0.25 2.5
1962 81 50 0.00 0.0
1961 55 35 0.15 0.0
1960 70 32 0.00 0.0
1959 35 19 0.02 0.6
1958 67 32 0.07 0.5
1957 62 30 0.00 0.0
1956 69 34 0.00 0.0
1955 58 29 0.00 0.0
1954 60 30 0.00 0.0
1953 67 24 0.00 0.0
1952 60 38 0.00 0.0
1951 26 16 0.04 0.6
1950 67 29 0.00 0.0
1949 64 36 0.07 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 53 33 0.01 0.0
1938 52 33 0.00 0.0
1937 55 31 0.00 0.0
1936 70 40 0.00 0.0
1935 70 34 0.00 0.0
1934 60 30 0.00 0.0
1933 n/a 32 3.50 23.5
1932 76 41 n/a n/a
1931 47 26 0.00 0.0
1930 69 28 0.09 n/a
1929 46 38 0.20 n/a
1928 52 29 n/a n/a
1927 45 21 0.05 0.0
1926 72 50 n/a n/a
1925 55 39 n/a n/a
1924 58 29 n/a n/a
1923 53 28 n/a n/a
1922 61 40 0.00 n/a
1921 63 36 0.02 n/a
1920 57 26 0.00 0.0
1919 n/a n/a n/a n/a
1918 51 23 0.00 0.0
1917 57 29 0.00 n/a
1916 43 29 0.05 0.0
1915 n/a n/a n/a n/a
1914 65 49 0.00 0.0
1913 n/a n/a n/a n/a
1912 57 32 0.00 0.0
1911 70 22 0.00 0.0
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 77 48 0.00 0.0
1901 76 28 0.00 n/a
What's the all-time high for Casper on 4/20?
For the date of Apr 20, the highest temperature ever reached in Casper history is 81 °F which has happened 3 times, most recently in 1989.
Highest Temperatures in Casper on April 20
Rank Temperature Year
1 81 °F 1980
1 81 °F 1989
1 81 °F 1962
4 79 °F 1994
5 77 °F 1902
5 77 °F 2019
7 76 °F 1901
7 76 °F 1932
9 75 °F 1990
10 73 °F 1965
What's the all-time low for Casper on 4/20?
For the date of Apr 20, the lowest temperature ever reached in Casper history is -2 °F which happened in 1966.
Lowest Temperatures in Casper on April 20
Rank Temperature Year
1 -2 °F 1966
2 13 °F 2021
3 16 °F 1951
4 19 °F 1959
4 19 °F 2024
6 20 °F 2008
7 21 °F 1927
7 21 °F 2011
9 22 °F 1911
9 22 °F 1996
9 22 °F 1982
Lowest High Temperatures in Casper on April 20
Rank Temperature Year
1 26 °F 1951
2 30 °F 2002
3 33 °F 1966
3 33 °F 2021
5 35 °F 1959
6 36 °F 1974
7 37 °F 1982
8 39 °F 1973
9 41 °F 1984
10 42 °F 1987
10 42 °F 2005
What's the most it has ever rained in Casper on 4/20?
For the date of Apr 20, the most precipitation ever recorded in Casper history is 3.50 inches which happened in 1933.
All-Time Most Precipitation in Casper on April 20
Rank Precipitation Year
1 3.50 inches 1933
2 1.82 inches 1974
3 0.43 inches 1973
4 0.32 inches 1971
5 0.25 inches 2005
5 0.25 inches 1963
7 0.20 inches 1929
8 0.16 inches 2018
9 0.15 inches 1961
10 0.13 inches 1999
All-Time Most Snow in Casper on April 20
Rank Precipitation Year
1 23.5 inches 1933
2 10.5 inches 1974
3 4.5 inches 1973
4 3.0 inches 2002
5 2.5 inches 1963
6 1.6 inches 1971
7 1.0 inches 2005
7 1.0 inches 2001
9 0.6 inches 1959
9 0.6 inches 1951
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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