Number of Days of 90 °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 90 degrees Fahrenheit in Boulder, Colorado, between 1893 and 2024.

Also see:

Which year had the most 90° days?

Based on NOAA records, the year 1952 holds the record for the most 90 °F days in Boulder history. There were 60 days with a high temperature of at least 90 degrees that year.

How many so far this year (2024)?

It has not reached 90 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 90° F was September 7, 2023.

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

Year	Rank	Days >= 90 °F
2024	127	0
2023	42	33
2022	7	52
2021	12	50
2020	8	51
2019	26	40
2018	15	46
2017	42	33
2016	15	46
2015	33	35
2014	84	18
2013	21	43
2012	2	59
2011	26	40
2010	42	33
2009	100	13
2008	42	33
2007	17	45
2006	19	44
2005	49	32
2004	95	14
2003	23	41
2002	5	53
2001	23	41
2000	8	51
1999	90	16
1998	56	28
1997	110	9
1996	78	20
1995	38	34
1994	53	30
1993	102	12
1992	117	6
1991	94	15
1990	67	22
1989	74	21
1988	30	37
1987	51	31
1986	74	21
1985	38	34
1984	30	37
1983	17	45
1982	78	20
1981	56	28
1980	3	55
1979	78	20
1978	19	44
1977	61	26
1976	65	23
1975	78	20
1974	42	33
1973	51	31
1972	90	16
1971	56	28
1970	90	16
1969	33	35
1968	67	22
1967	95	14
1966	42	33
1965	95	14
1964	38	34
1963	42	33
1962	62	25
1961	67	22
1960	5	53
1959	54	29
1958	49	32
1957	33	35
1956	8	51
1955	8	51
1954	4	54
1953	14	47
1952	1	60
1951	29	38
1950	56	28
1949	32	36
1948	13	49
1947	26	40
1946	82	19
1945	95	14
1944	100	13
1943	62	25
1942	110	9
1941	119	5
1940	88	17
1939	84	18
1938	74	21
1937	67	22
1936	38	34
1935	67	22
1934	23	41
1933	33	35
1932	74	21
1931	21	43
1930	65	23
1929	64	24
1928	88	17
1927	102	12
1926	95	14
1925	90	16
1924	67	22
1923	123	4
1922	56	28
1921	102	12
1920	110	9
1919	33	35
1918	84	18
1917	54	29
1916	84	18
1915	119	5
1914	114	7
1913	108	10
1912	126	2
1911	106	11
1910	124	3
1909	110	9
1908	119	5
1907	117	6
1906	127	0
1905	114	7
1904	119	5
1903	114	7
1902	67	22
1901	82	19
1900	106	11
1899	102	12
1898	108	10
1897	124	3
1896	127	0
1895	127	0
1894	127	0
1893	127	0

Weather Station Details

Years	Station	Coordinates
1893–2024	Boulder	location