Casper December 20 Weather Records

Daily averages and all-time records for weather in Casper, Wyoming for the date of December 20.
December 20 All-Time Records
1900–2024
Highest temperature 57 °F 1931
Lowest temperature -36 °F 1990
Lowest daily high -20 °F 1990
Highest daily low 42 °F 1900
Most precipitation 0.40 inches 1925
Most snow 5.0 inches 1925
December 20 Average Weather
1991–2020 1
Average high 34.5 °F
Average low 14.7 °F
Chance precipitation 24.7%
Chance snow 23.9%
Casper December 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 54 34 0.00 0.0
2022 33 20 0.00 0.0
2021 47 17 0.00 0.0
2020 40 25 0.00 0.0
2019 38 23 0.00 0.0
2018 43 18 0.00 0.0
2017 49 13 0.14 0.8
2016 42 28 0.00 0.0
2015 37 22 0.00 0.0
2014 36 29 0.00 0.0
2013 20 3 0.01 0.2
2012 35 14 0.00 0.0
2011 35 15 0.00 0.0
2010 40 29 0.01 0.0
2009 43 29 0.00 0.0
2008 11 -19 0.00 0.0
2007 40 32 0.00 0.0
2006 30 5 0.00 0.0
2005 40 15 0.00 0.0
2004 43 15 0.00 0.5
2003 52 32 0.00 0.0
2002 30 12 0.00 0.0
2001 39 11 0.00 0.0
2000 25 -10 0.04 3.5
1999 30 10 0.00 0.0
1998 -9 -25 0.00 0.0
1997 27 14 0.00 0.0
1996 34 23 0.00 n/a
1995 31 11 0.00 0.0
1994 41 25 0.00 0.0
1993 27 7 0.00 0.0
1992 28 17 0.00 0.0
1991 35 25 0.02 0.3
1990 -20 -36 0.07 1.4
1989 28 -7 0.00 0.0
1988 40 10 0.00 0.0
1987 31 0 0.00 0.0
1986 37 14 0.00 0.0
1985 39 25 0.00 0.0
1984 37 19 0.00 0.0
1983 -4 -32 0.08 1.8
1982 41 29 0.00 0.0
1981 54 32 0.01 0.0
1980 44 10 0.00 0.0
1979 47 29 0.00 0.0
1978 20 0 0.03 0.6
1977 26 10 0.00 0.0
1976 36 11 0.00 0.0
1975 36 19 0.00 0.0
1974 32 12 0.00 0.0
1973 33 18 0.00 0.0
1972 44 25 0.00 0.0
1971 37 26 0.00 0.0
1970 26 6 0.00 0.0
1969 46 23 0.00 0.0
1968 14 5 0.15 4.0
1967 9 -4 0.11 2.7
1966 51 29 0.00 0.0
1965 37 24 0.00 0.0
1964 43 30 0.00 0.0
1963 37 19 0.00 0.0
1962 33 18 0.06 0.7
1961 44 32 0.00 0.0
1960 33 3 0.00 0.0
1959 46 23 0.00 0.0
1958 45 29 0.00 0.0
1957 45 30 0.00 0.0
1956 37 23 0.00 0.0
1955 49 35 0.00 0.0
1954 44 32 0.00 0.0
1953 46 26 0.00 0.0
1952 46 32 0.00 0.0
1951 20 -17 0.00 0.0
1950 50 32 0.00 0.0
1949 18 -8 0.06 1.4
1948 42 7 0.03 0.4
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 n/a n/a n/a n/a
1938 32 6 0.00 0.0
1937 29 14 0.00 0.0
1936 45 22 0.00 0.0
1935 45 6 0.00 n/a
1934 35 n/a 0.00 0.0
1933 49 36 0.00 0.0
1932 n/a n/a 0.00 0.0
1931 57 24 0.00 0.0
1930 29 9 n/a n/a
1929 25 0 n/a n/a
1928 25 21 n/a n/a
1927 n/a n/a n/a n/a
1926 33 13 n/a n/a
1925 31 14 0.40 5.0
1924 6 -18 n/a n/a
1923 40 21 n/a n/a
1922 39 25 n/a n/a
1921 13 -3 0.30 3.0
1920 40 15 0.33 4.0
1919 n/a n/a n/a n/a
1918 34 8 0.00 0.0
1917 56 32 0.00 0.0
1916 n/a n/a n/a n/a
1915 32 n/a 0.00 0.0
1914 14 -8 0.00 0.0
1913 23 -10 0.00 0.0
1912 n/a n/a n/a n/a
1911 36 9 0.00 0.0
1910 43 16 0.00 0.0
1909 17 -6 0.00 0.0
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 n/a n/a n/a n/a
1900 55 42 0.00 0.0
What's the all-time high for Casper on 12/20?
For the date of Dec 20, the highest temperature ever reached in Casper history is 57 °F which happened in 1931.
Highest Temperatures in Casper on December 20
Rank Temperature Year
1 57 °F 1931
2 56 °F 1917
3 55 °F 1900
4 54 °F 2023
4 54 °F 1981
6 52 °F 2003
7 51 °F 1966
8 50 °F 1950
9 49 °F 2017
9 49 °F 1933
9 49 °F 1955
What's the all-time low for Casper on 12/20?
For the date of Dec 20, the lowest temperature ever reached in Casper history is -36 °F which happened in 1990.
Lowest Temperatures in Casper on December 20
Rank Temperature Year
1 -36 °F 1990
2 -32 °F 1983
3 -25 °F 1998
4 -19 °F 2008
5 -18 °F 1924
6 -17 °F 1951
7 -10 °F 2000
7 -10 °F 1913
9 -8 °F 1949
9 -8 °F 1914
Lowest High Temperatures in Casper on December 20
Rank Temperature Year
1 -20 °F 1990
2 -9 °F 1998
3 -4 °F 1983
4 6 °F 1924
5 9 °F 1967
6 11 °F 2008
7 13 °F 1921
8 14 °F 1968
8 14 °F 1914
10 17 °F 1909
What's the most it has ever rained in Casper on 12/20?
For the date of Dec 20, the most precipitation ever recorded in Casper history is 0.40 inches which happened in 1925.
All-Time Most Precipitation in Casper on December 20
Rank Precipitation Year
1 0.40 inches 1925
2 0.33 inches 1920
3 0.30 inches 1921
4 0.15 inches 1968
5 0.14 inches 2017
6 0.11 inches 1967
7 0.08 inches 1983
8 0.07 inches 1990
9 0.06 inches 1962
9 0.06 inches 1949
All-Time Most Snow in Casper on December 20
Rank Precipitation Year
1 5.0 inches 1925
2 4.0 inches 1968
2 4.0 inches 1920
4 3.5 inches 2000
5 3.0 inches 1921
6 2.7 inches 1967
7 1.8 inches 1983
8 1.4 inches 1949
8 1.4 inches 1990
10 0.8 inches 2017
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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