Number of Days of 100 °F in Casper by Year

This page contains a list of the number of days in each year that the temperature equaled or exceeded 100 °F in Casper, Wyoming, between 1900 and 2023.

What Year Had the Most 100° Days?

Based on NOAA records, the year 1912 holds the record for the most 100° F days in Casper history. There were 46 days with a high temperature of at least 100 degrees that year.

How Many 100° Days Have There Been So Far?

It has not reached 100 degrees Fahrenheit in Casper so far in 2023. As of May 29, the highest temperature this year is 81 °F.

Years marked with a gold background have more than 5% incomplete data
Click column headers to sort

Year	Rank	Days Over 100 °F
2023	45	0
2022	15	2
2021	15	2
2020	25	1
2019	45	0
2018	8	3
2017	45	0
2016	25	1
2015	45	0
2014	25	1
2013	45	0
2012	8	3
2011	45	0
2010	45	0
2009	45	0
2008	45	0
2007	15	2
2006	3	8
2005	8	3
2004	45	0
2003	8	3
2002	15	2
2001	25	1
2000	15	2
1999	45	0
1998	15	2
1997	45	0
1996	45	0
1995	15	2
1994	15	2
1993	45	0
1992	45	0
1991	45	0
1990	6	4
1989	8	3
1988	8	3
1987	45	0
1986	45	0
1985	45	0
1984	45	0
1983	25	1
1982	25	1
1981	25	1
1980	45	0
1979	25	1
1978	45	0
1977	45	0
1976	45	0
1975	45	0
1974	45	0
1973	45	0
1972	45	0
1971	45	0
1970	25	1
1969	45	0
1968	45	0
1967	45	0
1966	45	0
1965	45	0
1964	45	0
1963	45	0
1962	45	0
1961	45	0
1960	45	0
1959	25	1
1958	45	0
1957	45	0
1956	45	0
1955	45	0
1954	5	5
1953	25	1
1952	45	0
1951	45	0
1950	45	0
1949	45	0
1948	45	0
1947	45	0
1946	45	0
1945	45	0
1944	45	0
1943	45	0
1942	45	0
1941	45	0
1940	45	0
1939	6	4
1938	15	2
1937	25	1
1936	25	1
1935	8	3
1934	25	1
1933	25	1
1932	25	1
1931	25	1
1930	25	1
1929	25	1
1928	45	0
1927	45	0
1926	45	0
1925	15	2
1924	45	0
1923	45	0
1922	45	0
1921	45	0
1920	45	0
1919	45	0
1918	45	0
1917	45	0
1916	25	1
1915	45	0
1914	45	0
1913	45	0
1912	1	46
1911	2	31
1910	45	0
1909	45	0
1908	45	0
1907	45	0
1906	45	0
1905	45	0
1904	45	0
1903	45	0
1902	45	0
1901	4	7
1900	45	0

Weather Station Details

Years	Station	Coordinates
1949–2023	Casper-Natrona County International Airport	location
1900–1948	Casper 2 E	location