Number of Days of 100 °F in Boulder by Year

This page contains a list of the number of days in each year that the high temperature equaled or exceeded 100 degrees Fahrenheit in Boulder, Colorado, between 1893 and 2024.

Also see:

Which year had the most 100° days?

Based on NOAA records, the year 1954 holds the record for the most 100 °F days in Boulder history. There were 6 days with a high temperature of at least 100 degrees that year.

How many so far this year (2024)?

It has not reached 100 degrees Fahrenheit in Boulder so far in 2024. As of April 25, the highest temperature this year is 80 °F.

The last time it reached at least 100° F was July 19, 2022.

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

Year	Rank	Days >= 100 °F
2024	30	0
2023	30	0
2022	10	1
2021	30	0
2020	10	1
2019	10	1
2018	30	0
2017	10	1
2016	30	0
2015	30	0
2014	30	0
2013	30	0
2012	2	4
2011	30	0
2010	30	0
2009	30	0
2008	30	0
2007	30	0
2006	5	2
2005	10	1
2004	30	0
2003	5	2
2002	4	3
2001	30	0
2000	30	0
1999	30	0
1998	5	2
1997	30	0
1996	30	0
1995	30	0
1994	10	1
1993	30	0
1992	30	0
1991	30	0
1990	10	1
1989	5	2
1988	30	0
1987	30	0
1986	30	0
1985	30	0
1984	30	0
1983	10	1
1982	30	0
1981	30	0
1980	10	1
1979	10	1
1978	30	0
1977	30	0
1976	30	0
1975	30	0
1974	30	0
1973	10	1
1972	30	0
1971	10	1
1970	30	0
1969	10	1
1968	30	0
1967	30	0
1966	30	0
1965	30	0
1964	30	0
1963	30	0
1962	30	0
1961	30	0
1960	30	0
1959	30	0
1958	30	0
1957	30	0
1956	30	0
1955	30	0
1954	1	6
1953	10	1
1952	5	2
1951	10	1
1950	30	0
1949	30	0
1948	30	0
1947	2	4
1946	30	0
1945	30	0
1944	30	0
1943	30	0
1942	30	0
1941	30	0
1940	30	0
1939	30	0
1938	10	1
1937	30	0
1936	10	1
1935	30	0
1934	10	1
1933	30	0
1932	30	0
1931	10	1
1930	30	0
1929	30	0
1928	30	0
1927	30	0
1926	30	0
1925	10	1
1924	30	0
1923	30	0
1922	30	0
1921	30	0
1920	30	0
1919	30	0
1918	30	0
1917	30	0
1916	30	0
1915	30	0
1914	30	0
1913	30	0
1912	30	0
1911	30	0
1910	30	0
1909	30	0
1908	30	0
1907	30	0
1906	30	0
1905	30	0
1904	30	0
1903	30	0
1902	30	0
1901	30	0
1900	30	0
1899	30	0
1898	30	0
1897	30	0
1896	30	0
1895	30	0
1894	30	0
1893	30	0

Weather Station Details

Years	Station	Coordinates
1893–2024	Boulder	location