Casper September 15 Weather Records

Daily averages and all-time records for weather in Casper, Wyoming for the date of September 15.
September 15 All-Time Records
1900–2024
Highest temperature 101 °F 1911
Lowest temperature 25 °F 1916
Lowest daily high 40 °F 1973
Highest daily low 58 °F 1955
Most precipitation 0.47 inches 2017
Most snow 0.7 inches 1965
September 15 Average Weather
1991–2020 1
Average high 76.0 °F
Average low 42.7 °F
Chance precipitation 22.8%
Chance snow 1.7%
Casper September 15 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 71 40 0.00 0.0
2022 55 43 0.19 0.0
2021 87 44 0.00 0.0
2020 88 45 0.00 0.0
2019 88 51 0.00 0.0
2018 91 38 0.00 0.0
2017 52 43 0.47 0.0
2016 62 41 0.17 0.0
2015 80 57 0.00 0.0
2014 85 30 0.00 0.0
2013 66 51 0.02 0.0
2012 86 44 0.00 0.0
2011 73 39 0.00 0.0
2010 76 40 0.00 0.0
2009 83 54 0.08 0.0
2008 77 33 0.00 0.0
2007 85 49 0.00 0.0
2006 71 50 0.04 0.0
2005 76 33 0.00 0.0
2004 68 37 0.00 0.0
2003 79 42 0.00 0.0
2002 86 38 0.00 0.0
2001 64 44 0.00 0.0
2000 92 43 0.00 0.0
1999 73 30 0.00 0.0
1998 83 42 0.00 n/a
1997 85 50 0.07 n/a
1996 75 46 0.00 n/a
1995 88 53 0.00 0.0
1994 70 43 0.02 0.0
1993 79 49 0.00 0.0
1992 86 53 0.00 0.0
1991 61 35 0.00 0.0
1990 83 50 0.00 0.0
1989 81 48 0.00 0.0
1988 70 40 0.00 0.0
1987 81 50 0.00 0.0
1986 74 48 0.00 0.0
1985 82 54 0.03 0.0
1984 70 32 0.00 0.0
1983 75 43 0.00 0.0
1982 52 34 0.01 0.0
1981 76 49 0.00 0.0
1980 83 41 0.00 0.0
1979 83 39 0.00 0.0
1978 80 38 0.00 0.0
1977 78 54 0.01 0.0
1976 79 44 0.00 0.0
1975 82 49 0.00 0.0
1974 72 34 0.00 0.0
1973 40 33 0.02 0.0
1972 79 35 0.00 0.0
1971 59 31 0.01 0.0
1970 62 31 0.00 0.0
1969 79 35 0.00 0.0
1968 66 37 0.14 0.0
1967 69 42 0.05 0.0
1966 65 39 0.00 0.0
1965 64 28 0.27 0.7
1964 73 42 0.00 0.0
1963 78 41 0.00 0.0
1962 84 46 0.00 0.0
1961 79 34 0.00 0.0
1960 71 45 0.00 0.0
1959 78 52 0.15 0.0
1958 66 41 0.00 0.0
1957 67 39 0.00 0.0
1956 84 48 0.00 0.0
1955 77 58 0.00 0.0
1954 85 46 0.00 0.0
1953 86 48 0.00 0.0
1952 82 34 0.00 0.0
1951 65 38 0.00 0.0
1950 46 37 0.07 0.0
1949 82 41 0.00 0.0
1948 92 52 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 68 44 0.00 0.0
1938 74 40 0.00 0.0
1937 n/a n/a n/a n/a
1936 82 35 0.00 0.0
1935 80 47 0.00 0.0
1934 75 28 0.00 0.0
1933 75 50 0.00 0.0
1932 80 45 0.00 0.0
1931 82 53 0.00 n/a
1930 77 45 n/a n/a
1929 82 41 0.05 n/a
1928 80 40 n/a n/a
1927 76 41 n/a n/a
1926 81 41 n/a n/a
1925 79 54 n/a n/a
1924 75 40 n/a n/a
1923 80 47 n/a n/a
1922 78 48 0.00 n/a
1921 60 42 0.12 n/a
1920 84 38 0.00 n/a
1919 n/a n/a n/a n/a
1918 n/a n/a n/a n/a
1917 64 39 0.00 0.0
1916 70 25 0.00 n/a
1915 63 32 0.00 0.0
1914 72 52 0.00 0.0
1913 n/a n/a n/a n/a
1912 n/a n/a n/a n/a
1911 101 n/a n/a 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 66 31 0.00 0.0
What's the all-time high for Casper on 9/15?
For the date of Sep 15, the highest temperature ever reached in Casper history is 101 °F which happened in 1911.
Highest Temperatures in Casper on September 15
Rank Temperature Year
1 101 °F 1911
2 92 °F 2000
2 92 °F 1948
4 91 °F 2018
5 88 °F 1995
5 88 °F 2019
5 88 °F 2020
8 87 °F 2021
9 86 °F 1992
9 86 °F 2002
9 86 °F 2012
9 86 °F 1953
What's the all-time low for Casper on 9/15?
For the date of Sep 15, the lowest temperature ever reached in Casper history is 25 °F which happened in 1916.
Lowest Temperatures in Casper on September 15
Rank Temperature Year
1 25 °F 1916
2 28 °F 1934
2 28 °F 1965
4 30 °F 1999
4 30 °F 2014
6 31 °F 1971
6 31 °F 1901
6 31 °F 1970
9 32 °F 1984
9 32 °F 1915
Lowest High Temperatures in Casper on September 15
Rank Temperature Year
1 40 °F 1973
2 46 °F 1950
3 52 °F 2017
3 52 °F 1982
5 55 °F 2022
6 59 °F 1971
7 60 °F 1921
8 61 °F 1991
9 62 °F 1970
9 62 °F 2016
What's the most it has ever rained in Casper on 9/15?
For the date of Sep 15, the most precipitation ever recorded in Casper history is 0.47 inches which happened in 2017.
All-Time Most Precipitation in Casper on September 15
Rank Precipitation Year
1 0.47 inches 2017
2 0.27 inches 1965
3 0.19 inches 2022
4 0.17 inches 2016
5 0.15 inches 1959
6 0.14 inches 1968
7 0.12 inches 1921
8 0.08 inches 2009
9 0.07 inches 1950
9 0.07 inches 1997
All-Time Most Snow in Casper on September 15
Rank Precipitation Year
1 0.7 inches 1965
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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