Casper June 21 Weather Records

Daily averages and all-time records for weather in Casper, Wyoming for the date of June 21.
June 21 All-Time Records
1900–2024
Highest temperature 100 °F 2016
Lowest temperature 34 °F 1902
Lowest daily high 60 °F 1951
Highest daily low 67 °F 1931
Most precipitation 0.40 inches 1938
Most snow none -
June 21 Average Weather
1991–2020 1
Average high 82.0 °F
Average low 47.2 °F
Chance precipitation 27.0%
Chance snow 0.1%
Casper June 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 65 49 0.00 0.0
2022 78 40 0.00 0.0
2021 80 50 0.00 0.0
2020 78 46 0.00 0.0
2019 66 42 0.00 0.0
2018 84 46 0.02 0.0
2017 94 57 0.00 0.0
2016 100 55 0.00 0.0
2015 95 46 0.00 0.0
2014 88 41 0.00 0.0
2013 85 53 0.00 0.0
2012 86 37 0.00 0.0
2011 73 46 0.00 0.0
2010 84 45 0.00 0.0
2009 77 53 0.00 0.0
2008 85 39 0.00 0.0
2007 93 54 0.00 0.0
2006 83 47 0.00 0.0
2005 95 53 0.00 0.0
2004 67 39 0.00 0.0
2003 72 53 0.00 0.0
2002 89 51 0.00 0.0
2001 85 38 0.00 0.0
2000 82 41 0.00 0.0
1999 86 63 0.00 0.0
1998 73 42 0.00 n/a
1997 87 40 0.00 n/a
1996 74 50 0.34 n/a
1995 82 50 0.00 0.0
1994 91 51 0.00 0.0
1993 85 53 0.00 0.0
1992 86 51 0.00 0.0
1991 78 51 0.00 0.0
1990 65 45 0.09 0.0
1989 63 38 0.02 0.0
1988 97 61 0.02 0.0
1987 91 50 0.00 0.0
1986 77 46 0.00 0.0
1985 72 46 0.00 0.0
1984 87 47 0.00 0.0
1983 90 49 0.00 0.0
1982 82 52 0.02 0.0
1981 83 50 0.00 0.0
1980 84 54 0.00 0.0
1979 87 44 0.00 0.0
1978 87 46 0.00 0.0
1977 80 51 0.11 0.0
1976 83 50 0.00 0.0
1975 64 45 0.00 0.0
1974 81 53 0.00 0.0
1973 82 39 0.00 0.0
1972 85 42 0.00 0.0
1971 87 50 0.00 0.0
1970 83 46 0.00 0.0
1969 79 49 0.06 0.0
1968 85 45 0.00 0.0
1967 73 46 0.00 0.0
1966 85 51 0.00 0.0
1965 83 50 0.00 0.0
1964 67 42 0.00 0.0
1963 89 54 0.00 0.0
1962 76 49 0.07 0.0
1961 89 55 0.00 0.0
1960 75 37 0.00 0.0
1959 85 58 0.00 0.0
1958 77 46 0.01 0.0
1957 62 45 0.04 0.0
1956 74 47 0.00 0.0
1955 88 57 0.00 0.0
1954 84 53 0.00 0.0
1953 80 45 0.00 0.0
1952 85 45 0.00 0.0
1951 60 47 0.10 0.0
1950 84 49 0.01 0.0
1949 87 43 0.00 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 66 45 0.00 0.0
1938 88 53 0.40 n/a
1937 90 50 0.00 0.0
1936 90 56 0.00 0.0
1935 77 41 0.00 0.0
1934 78 60 0.10 n/a
1933 90 55 0.00 n/a
1932 90 46 0.00 n/a
1931 93 67 n/a n/a
1930 86 50 n/a n/a
1929 82 48 n/a n/a
1928 67 48 0.07 n/a
1927 69 43 0.00 n/a
1926 69 38 n/a n/a
1925 89 61 0.03 n/a
1924 81 44 n/a n/a
1923 74 53 0.12 n/a
1922 95 57 0.00 n/a
1921 76 48 0.00 n/a
1920 73 44 0.00 0.0
1919 n/a n/a n/a n/a
1918 n/a n/a n/a n/a
1917 81 45 0.03 0.0
1916 84 51 0.00 n/a
1915 71 36 0.00 0.0
1914 66 55 0.00 0.0
1913 84 48 0.00 n/a
1912 89 48 0.00 n/a
1911 90 56 0.25 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 85 34 0.00 n/a
1901 84 45 0.00 n/a
What's the all-time high for Casper on 6/21?
For the date of Jun 21, the highest temperature ever reached in Casper history is 100 °F which happened in 2016.
Highest Temperatures in Casper on June 21
Rank Temperature Year
1 100 °F 2016
2 97 °F 1988
3 95 °F 1922
3 95 °F 2005
3 95 °F 2015
6 94 °F 2017
7 93 °F 1931
7 93 °F 2007
9 91 °F 1994
9 91 °F 1987
What's the all-time low for Casper on 6/21?
For the date of Jun 21, the lowest temperature ever reached in Casper history is 34 °F which happened in 1902.
Lowest Temperatures in Casper on June 21
Rank Temperature Year
1 34 °F 1902
2 36 °F 1915
3 37 °F 1960
3 37 °F 2012
5 38 °F 1989
5 38 °F 2001
5 38 °F 1926
8 39 °F 2004
8 39 °F 1973
8 39 °F 2008
Lowest High Temperatures in Casper on June 21
Rank Temperature Year
1 60 °F 1951
2 62 °F 1957
3 63 °F 1989
4 64 °F 1975
5 65 °F 2023
5 65 °F 1990
7 66 °F 2019
7 66 °F 1939
7 66 °F 1914
10 67 °F 1928
10 67 °F 2004
10 67 °F 1964
What's the most it has ever rained in Casper on 6/21?
For the date of Jun 21, the most precipitation ever recorded in Casper history is 0.40 inches which happened in 1938.
All-Time Most Precipitation in Casper on June 21
Rank Precipitation Year
1 0.40 inches 1938
2 0.34 inches 1996
3 0.25 inches 1911
4 0.12 inches 1923
5 0.11 inches 1977
6 0.10 inches 1951
6 0.10 inches 1934
8 0.09 inches 1990
9 0.07 inches 1962
9 0.07 inches 1928
Weather Station Details
Years Station Coordinates
1949–2024 Casper-Natrona County International Airport location
1900–1948 Casper 2 E location