Casper September 30 Weather Records

Daily averages and all-time records for weather in Casper, Wyoming for the date of September 30.
September 30 All-Time Records
1900–2024
Highest temperature 88 °F 1980
Lowest temperature 17 °F 1985
Lowest daily high 36 °F 1982
Highest daily low 58 °F 1914
Most precipitation 0.66 inches 1982
Most snow 6.6 inches 1982
September 30 Average Weather
1991–2020 1
Average high 68.1 °F
Average low 36.9 °F
Chance precipitation 26.3%
Chance snow 7.3%
Casper September 30 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 85 34 0.00 0.0
2022 65 50 0.06 0.0
2021 59 32 0.00 0.0
2020 67 34 0.00 0.0
2019 55 37 0.20 0.0
2018 59 39 0.03 0.0
2017 70 43 0.00 0.0
2016 77 46 0.00 0.0
2015 81 45 0.00 0.0
2014 66 45 0.00 0.0
2013 75 39 0.00 0.0
2012 75 43 0.01 0.0
2011 84 37 0.00 0.0
2010 80 34 0.00 0.0
2009 70 32 0.39 1.3
2008 82 35 0.00 0.0
2007 62 40 0.07 0.0
2006 79 35 0.00 0.0
2005 82 48 0.00 0.0
2004 58 45 0.53 0.0
2003 59 31 0.00 0.0
2002 67 47 0.00 0.0
2001 76 37 0.00 0.0
2000 77 44 0.00 0.0
1999 65 28 0.00 0.0
1998 62 41 0.00 n/a
1997 80 37 0.00 n/a
1996 80 40 0.00 n/a
1995 59 42 0.25 0.0
1994 69 51 0.00 0.0
1993 81 41 0.00 0.0
1992 86 38 0.00 0.0
1991 76 45 0.00 0.0
1990 75 43 0.00 0.0
1989 83 52 0.00 0.0
1988 74 39 0.00 0.0
1987 80 36 0.00 0.0
1986 58 32 0.00 0.0
1985 48 17 0.00 0.0
1984 69 19 0.00 0.0
1983 75 41 0.00 0.0
1982 36 32 0.66 6.6
1981 60 34 0.19 0.0
1980 88 48 0.00 0.0
1979 81 45 0.00 0.0
1978 78 32 0.00 0.0
1977 62 39 0.01 0.0
1976 80 43 0.00 0.0
1975 59 33 0.00 0.0
1974 70 30 0.00 0.0
1973 77 36 0.00 0.0
1972 77 38 0.00 0.0
1971 69 37 0.00 0.0
1970 79 34 0.00 0.0
1969 75 50 0.00 0.0
1968 77 46 0.00 0.0
1967 78 51 0.00 0.0
1966 55 33 0.10 0.0
1965 59 29 0.00 0.0
1964 76 45 0.00 0.0
1963 84 47 0.00 0.0
1962 60 34 0.00 0.0
1961 50 24 0.00 0.0
1960 78 36 0.00 0.0
1959 48 24 0.00 0.0
1958 52 29 0.00 0.0
1957 83 45 0.00 0.0
1956 78 43 0.00 0.0
1955 70 32 0.00 0.0
1954 56 34 0.00 0.0
1953 81 41 0.00 0.0
1952 80 44 0.00 0.0
1951 75 49 0.00 0.0
1950 53 30 0.12 0.8
1949 65 43 0.03 0.0
1948 63 47 0.00 0.0
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 0.00 n/a
1939 70 28 0.00 0.0
1938 85 44 0.00 0.0
1937 n/a n/a n/a n/a
1936 52 36 0.00 0.0
1935 70 37 0.00 0.0
1934 80 40 0.00 0.0
1933 71 n/a 0.00 0.0
1932 83 37 0.00 0.0
1931 79 40 0.00 n/a
1930 75 50 n/a n/a
1929 68 n/a n/a n/a
1928 76 53 n/a n/a
1927 54 35 0.05 n/a
1926 78 43 0.02 n/a
1925 63 33 n/a n/a
1924 79 40 n/a n/a
1923 49 41 0.27 n/a
1922 72 44 0.00 n/a
1921 74 46 0.00 n/a
1920 78 29 0.00 n/a
1919 n/a n/a n/a n/a
1918 n/a n/a n/a n/a
1917 73 35 0.00 0.0
1916 76 37 0.00 n/a
1915 61 22 0.00 0.0
1914 78 58 0.00 0.0
1913 n/a n/a n/a n/a
1912 n/a n/a n/a n/a
1911 76 38 0.02 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 80 40 0.00 0.0
What's the all-time high for Casper on 9/30?
For the date of Sep 30, the highest temperature ever reached in Casper history is 88 °F which happened in 1980.
Highest Temperatures in Casper on September 30
Rank Temperature Year
1 88 °F 1980
2 86 °F 1992
3 85 °F 1938
3 85 °F 2023
5 84 °F 1963
5 84 °F 2011
7 83 °F 1957
7 83 °F 1989
7 83 °F 1932
10 82 °F 2005
10 82 °F 2008
What's the all-time low for Casper on 9/30?
For the date of Sep 30, the lowest temperature ever reached in Casper history is 17 °F which happened in 1985.
Lowest Temperatures in Casper on September 30
Rank Temperature Year
1 17 °F 1985
2 19 °F 1984
3 22 °F 1915
4 24 °F 1959
4 24 °F 1961
6 28 °F 1999
6 28 °F 1939
8 29 °F 1920
8 29 °F 1958
8 29 °F 1965
Lowest High Temperatures in Casper on September 30
Rank Temperature Year
1 36 °F 1982
2 48 °F 1985
2 48 °F 1959
4 49 °F 1923
5 50 °F 1961
6 52 °F 1936
6 52 °F 1958
8 53 °F 1950
9 54 °F 1927
10 55 °F 2019
10 55 °F 1966
What's the most it has ever rained in Casper on 9/30?
For the date of Sep 30, the most precipitation ever recorded in Casper history is 0.66 inches which happened in 1982.
All-Time Most Precipitation in Casper on September 30
Rank Precipitation Year
1 0.66 inches 1982
2 0.53 inches 2004
3 0.39 inches 2009
4 0.27 inches 1923
5 0.25 inches 1995
6 0.20 inches 2019
7 0.19 inches 1981
8 0.12 inches 1950
9 0.10 inches 1966
10 0.07 inches 2007
All-Time Most Snow in Casper on September 30
Rank Precipitation Year
1 6.6 inches 1982
2 1.3 inches 2009
3 0.8 inches 1950
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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