BOULDER, CO

Average of Average Temperature (Degrees Fahrenheit)

(050848)

File last updated on April 25, 2024
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.

YEAR(S)	JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC		ANN
1893	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	51.53		39.48	b	38.43	c	43.15	i
1894	32.59	n	26.11	j	41.57	b	50.61	c	-----	z	-----	z	69.05	c	67.44		-----	z	-----	z	-----	z	31.48		52.03	g
1895	26.48	d	23.62	d	35.40	b	51.45		56.59	b	61.10		64.45	u	-----	z	-----	z	-----	z	-----	z	-----	z	42.44	f
1896	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1897	-----	z	-----	z	-----	z	-----	z	60.41	b	64.65		70.79	b	69.06		67.81	d	53.98	d	41.38	i	31.91	d	59.80	e
1898	30.68		38.65	b	36.17	d	49.21	a	52.53	a	66.65		72.11		73.00		62.88	b	49.03	b	36.86	b	29.31		49.76
1899	31.55		18.02		34.42		49.07		57.06		65.90		69.05		70.37		65.80		50.52		47.68		35.87		49.61
1900	37.00		31.04	a	43.11		45.83		59.82		69.52		70.73		72.26		61.57		57.19		44.47		38.89		52.62
1901	36.39		29.38		39.95		47.10	a	59.48		65.93		75.26		71.32		61.72		53.50	a	47.78	a	34.80	a	51.88
1902	31.90	a	38.02		39.10		48.78		59.10		66.82		69.72	a	71.84		60.88		55.02	a	42.20	b	37.45	b	51.73
1903	36.87	d	22.88		36.93	b	48.43	a	54.92	a	60.71	b	71.05		70.58		60.95		54.93	a	42.80		39.77		50.07
1904	31.83	b	41.91	a	43.07	c	49.35		55.42		61.22		67.84		70.21		64.22		54.84		48.45		37.34		52.14
1905	29.04	e	26.95		44.50		46.04	b	53.07	a	65.95		67.94		72.42		66.02		48.44		43.93	b	35.84	f	51.30	a
1906	39.05		37.46		29.77		50.30		57.45		62.38		67.10	a	69.02	a	62.12		51.33	a	38.57		41.29		50.49
1907	34.08	a	42.80		48.30	a	46.38	a	50.71		63.50		70.29		70.56		63.85		54.18		40.93	c	37.29	g	53.23	a
1908	37.03	a	38.02		45.81		53.43	c	54.77		64.02		70.03	a	67.79		66.10		48.95		39.97		34.26		51.68
1909	37.33	b	35.05		33.74		41.93		53.90		65.02	b	71.16		72.35		62.13		53.89		43.77		19.90		49.18
1910	29.79	e	30.16		54.05	a	54.00	b	55.74		66.85		-----	z	-----	z	63.00	b	54.48		45.82		35.97	b	48.99	b
1911	40.91	c	30.84		45.65		49.40		58.08		68.90		68.68	a	69.58	a	64.40		47.66		36.97		-----	z	52.82	a
1912	-----	z	-----	z	32.24	h	46.73		57.98	g	62.40	e	68.29		69.55		55.30	c	49.91	d	42.96	d	31.24	f	56.45	e
1913	32.08	g	24.38	c	36.05	c	48.91	c	57.64	c	65.38		70.39	c	71.64	c	60.38	a	47.68	c	45.47		26.11	c	50.37	a
1914	37.69	d	31.50	e	43.39	i	49.50	h	58.74	d	68.44	c	71.48	c	70.27	a	65.67	a	54.32		48.02	a	24.27	a	53.04	b
1915	29.77	a	36.37	a	32.74		52.05		54.60	a	62.97		68.18		65.27	a	61.57	a	54.98		44.24	c	32.57	b	49.61
1916	26.64	b	36.97		48.66		51.41	a	59.27	a	69.04	b	76.52		69.23		63.26	a	50.30	a	40.15	d	26.53		51.50
1917	29.48		34.52		33.33	b	45.33		50.55		68.32		76.98	a	71.34		65.20		50.27		47.92		38.60	a	50.99
1918	26.87		37.61		47.89		44.27		61.45		71.03		74.68		75.45		61.26	a	54.90	b	37.75		32.69		52.15
1919	36.37		31.28	c	40.77	a	50.78	a	58.87	a	69.47	a	76.90		76.42		68.54	b	51.78	m	35.73	j	34.82	n	56.60	c
1920	36.07	b	33.67		38.72	a	39.67		55.53	a	63.59	c	70.69		67.75	a	61.94	c	52.62	c	36.03	a	33.00	b	49.11
1921	34.23	a	37.39		45.53		46.05	a	56.62	b	66.15		71.58		70.44		64.31	a	57.18		44.31	a	36.12	a	52.49
1922	26.34		30.50	c	40.56		45.68		57.58		69.79	a	72.00	a	72.65	a	66.76	c	53.36	b	37.72		36.08		50.75
1923	38.19		28.85	a	33.65		47.20		55.35		63.85		70.37		66.87	a	59.62	a	43.55		41.77		32.29		48.46
1924	30.37	a	40.91		29.15	a	48.29	a	54.13		68.88	a	72.09	b	74.02		57.79	a	52.03		43.87		24.82	a	49.70
1925	29.83	a	41.05		44.13		51.48		58.69		65.88		73.45	a	68.32	a	63.23		41.00	b	40.56	d	33.14	b	50.90
1926	31.89	c	38.80	c	37.73	a	46.50		57.79		65.53	a	70.27		71.11		60.97		55.18		43.05		30.86	c	50.81
1927	36.31		38.48		37.16		49.30		59.23		63.48		69.34		65.40		60.95		54.37		45.54	b	27.12	a	50.56
1928	36.29		32.67		39.69		45.93		56.84		60.47		69.15		69.02		62.92		51.35	a	38.62	a	31.02	a	49.50
1929	26.50		23.27		40.15		47.02		55.60	a	67.35		73.65		72.29		58.68		52.56		32.63		37.53		48.94
1930	16.40		41.73		37.68		55.60		55.42		69.22		73.06		69.56		62.98		49.94		41.31	a	32.60	a	50.46
1931	35.34		38.67	a	37.21		48.15		55.52		70.23		74.65	a	71.68		66.63		54.24		38.12		34.69		52.09
1932	27.28	a	39.60		32.68	a	50.57		59.16		64.82		72.85		71.27		63.28		49.63		43.28	a	22.95		49.78
1933	36.29		29.07		43.58		46.25		54.84		71.75		75.46	c	69.45		66.24	a	58.07	a	46.47		44.38	a	53.49
1934	38.97		37.61	a	45.47		51.33		64.57	a	70.10		76.70	a	72.27	a	60.72	c	57.10		44.37		36.79		54.67
1935	38.71		38.02		42.94		45.70		49.42		58.40	a	73.27	a	71.31		63.22		51.27		36.65		33.77		50.22
1936	32.10		26.31		41.82		50.07		59.85		69.13		75.19		72.05		63.57		49.13		-----	z	35.19		52.22	a
1937	18.03		32.68		37.89		47.83		58.16		63.55		72.39		73.89		64.95		53.15		40.35		32.58		49.62
1938	34.55	b	35.66		41.65		48.50		53.44		65.73		71.31		72.53		64.40		53.89		35.55		33.12	b	50.86
1939	34.55		25.77	b	41.33	d	48.70		59.52		66.32		73.50		68.60		63.47		51.39		42.45	b	39.26		51.24
1940	23.44		35.10	d	42.60		45.43	b	57.89		68.27		71.53		68.18		61.17		52.84		35.90	e	33.81	e	49.68
1941	31.95	c	34.77	b	34.83	d	42.54	b	57.69		62.13		69.26		67.17	a	58.92	d	47.20	a	42.15		33.92		48.54
1942	29.73	a	23.67	a	36.75	c	49.15		54.39		64.02	c	72.24		69.87	a	60.33	d	50.71	b	43.05	b	37.16	b	49.25
1943	35.04	d	40.17	b	35.36	b	54.52	a	52.58		65.33		73.50	a	72.94		61.81	a	52.73		41.90		34.40	a	51.69
1944	31.93	b	31.84	a	33.45	a	42.10		56.87	a	64.10		68.94		70.61		61.47		53.87	a	42.20	b	33.00	b	49.20
1945	33.53		34.16	c	41.14	b	42.61	c	56.55	b	60.28		70.77		70.47		60.12	b	54.62	c	43.89	b	31.23	c	49.95
1946	33.43	d	38.21	b	45.57	a	55.89	b	52.92	f	67.48		71.83	b	70.57	d	63.20	b	48.80	d	37.85	c	39.55	a	52.03	a
1947	32.86	c	31.96	c	38.00	d	46.91	a	57.00	f	63.12	b	75.74	h	76.60	b	70.83	c	58.26	b	36.80	h	38.09	d	50.74	c
1948	32.85	g	31.83	f	35.84	c	54.11	c	60.28	b	68.40	a	75.27	a	75.05		69.78		55.03		39.82		33.27		56.68	b
1949	21.89		34.05		42.11		53.28		60.43	a	67.67		74.95		73.69		66.45		51.29		53.07		37.00		52.99
1950	32.94		42.04	a	40.34	b	49.80		55.47		69.23		71.39		71.92		61.95		61.94		43.48	a	40.19		53.39
1951	31.50		37.91		37.63	a	46.67		59.34		62.35		74.92		71.97		63.47		51.60		40.62		32.63	a	50.88
1952	35.92		38.09		36.24		50.93		58.66		74.63		75.87		72.45	a	68.55		57.24		37.17		36.40		53.51
1953	43.47		36.79		46.13		45.20		55.27		71.82		75.74		73.60		69.75		57.56		46.81	a	35.47		54.80
1954	39.76		47.59		37.38	a	55.83		58.26		71.52		78.29		74.97		67.98		53.68	c	47.52		39.69		56.04
1955	30.98		29.86		38.35		52.77		60.77	a	65.28	a	76.58		74.94		66.57		56.95		38.88		36.92		52.40
1956	37.32		30.84		42.73		49.18		62.02		74.95		74.16		72.00		69.32		58.42		41.28		39.77		54.33
1957	27.60		42.09		40.68		43.63		55.02		67.87		75.79		73.60		63.37		53.53		40.23		44.05	a	52.29
1958	36.98		39.68		33.45		46.35		64.31		70.22		71.65		74.79		65.80		56.21		42.53		37.31		53.27
1959	32.55		31.61		40.44		46.92		57.02		70.62		71.82		73.00		60.38		49.61		40.57		39.02		51.13
1960	31.29		28.38		40.26		52.25		59.53		71.02		74.55		73.85		66.33		54.50		43.82		35.45		52.60
1961	36.89		39.91		39.98		48.17		58.84		67.67		72.90		72.55		57.43		52.79		37.92		30.27		51.28
1962	25.26		34.70		37.08		52.75		61.50		66.48		72.03		73.05		63.53		57.52		45.82		37.84		52.30
1963	23.42		40.86		41.13		51.82		62.44		70.12	a	76.98	a	70.95		68.30		60.08		44.08		33.27		53.62
1964	35.42		31.98		36.21		48.72		61.03		66.42		76.98		71.44		64.37		55.76		41.93	a	36.03	a	52.19
1965	38.35		32.70		30.79		51.76	a	58.48		66.45		72.98		70.73		55.88		57.85		45.72		38.50		51.68
1966	31.40		31.27		46.26		48.50		63.71	b	67.48		77.70	a	71.53		64.45		53.55		43.12		34.10		52.76
1967	36.56		37.89		46.39		50.92		55.42		62.20		72.97		70.58		63.82		55.53		41.45		28.16		51.82
1968	33.65		36.57		44.53		45.75		55.60		69.63		72.56		69.98		63.23		55.19		38.45		32.66		51.48
1969	36.24		36.62		34.69		53.90		61.29		62.22		75.29		74.32		66.17	a	41.77		41.75		36.34		51.72
1970	33.87		40.89		36.74		45.08		60.93	a	65.93	a	73.60	a	73.60	a	60.85		47.60		41.55		35.63		51.36
1971	34.77		32.84		40.21		47.74	a	54.48		69.05		71.50		72.15		58.92		50.71		41.17		32.82		50.53
1972	32.61		40.17		47.48		49.57		56.85		68.07		69.87		69.00		62.00		51.53		33.92		27.89		50.75
1973	29.16		34.79		38.87		43.10		55.84		67.83		69.94		72.69		59.33		54.85		39.53		35.21		50.10
1974	28.61		37.32		43.92		47.62		61.23		68.00		73.26		68.65		60.18		54.21		39.85		32.69		51.29
1975	33.00		32.80		39.23		44.62		54.79		64.23		72.13		71.18		60.73		55.05		39.25		38.03		50.42
1976	32.47		41.38		38.44		49.20		55.85	a	66.23		73.16		69.71		60.75		49.40		39.33		36.60		51.04
1977	28.11		38.95		39.47		49.48		59.55		71.18		73.65		68.61		65.76	a	53.79		41.55		37.52	a	52.30
1978	27.16		29.75		43.27		49.20		56.84	b	66.88	a	73.65	a	69.47		65.02	a	54.03		40.18		-----	z	52.31	a
1979	22.61		35.86	c	42.55		50.02		-----	z	-----	z	73.05	a	67.97	a	-----	z	56.12	a	35.38	a	38.92		46.94	c
1980	29.45		36.48		38.87		47.67		55.56		71.70		74.63		71.92		65.68		52.53		43.17	a	44.06		52.64
1981	38.92		39.27		42.16		56.67		55.08		69.05		71.47	a	68.73		64.48		50.66		45.97	a	36.85		53.28
1982	32.79	b	35.54	a	43.85		50.10		55.60	a	62.25		71.70	a	72.65		61.46	b	50.55	a	-----	z	35.20	a	51.97	a
1983	-----	z	41.36	n	37.02	d	43.96	b	54.08	e	63.08	d	72.84	b	74.71		65.95	b	53.55	c	40.77	d	21.65	d	52.76	b
1984	30.05	c	36.12		39.45	c	43.38		60.35	a	65.52		73.50		71.47		61.74	a	45.42		40.92		34.37		50.19
1985	27.32		29.46		41.56		52.12		59.53	b	67.43	g	72.14	b	72.79	e	59.72	e	52.39	d	33.20	e	32.06		48.39	a
1986	42.98		37.54		48.73		50.65		56.89		69.22		71.60		70.68		59.45		50.24		41.21	a	33.50		52.72
1987	34.24		36.96		39.87	a	52.68		58.97		68.58		72.74		68.95		61.67		52.77		40.98		30.81		51.60
1988	28.92		35.74		40.85		51.55		59.24		70.92		72.76		71.84		62.27		54.74		41.58		32.74		51.93
1989	36.45		24.05		44.89		51.23		59.19		64.25		73.21		-----	z	-----	z	-----	z	-----	z	-----	z	50.47	e
1990	-----	z	-----	z	-----	z	47.98		54.63		69.95		68.63		68.77		64.70		54.05	a	45.15		27.29		55.68	c
1991	29.90		40.96		42.76		47.75		58.23		66.57		70.47		69.16		61.65		52.35	a	37.05		35.34		51.02
1992	35.29	c	40.59		43.30	a	54.23		59.06		62.90		68.31		66.29		64.42		54.02		34.10	a	29.33	a	50.99
1993	28.34		30.59		43.17	a	47.57		57.48		64.50		69.47		-----	z	58.72		48.63		35.62		35.58		47.24	a
1994	36.64	b	32.80	a	43.82		47.62		60.81		69.98		71.15		70.85		64.92		50.53		36.53		36.08		51.81
1995	34.52		38.63	a	42.11		45.12		50.85		62.33		70.48		73.97		60.38		51.50		44.90		36.24		50.92
1996	29.85	a	37.67		37.90	a	50.42		58.84		66.93		71.45		69.48		60.77		53.02		40.58		36.47		51.12
1997	31.24		32.70		45.52		42.82		57.43	a	66.45		71.40		68.69		64.02		52.66		37.87		33.84		50.39
1998	36.50		36.39		38.65		46.50		58.76		62.68		72.76		70.69		67.03		50.32		43.97		32.16		51.37
1999	36.21		42.09		45.98		44.72		55.58		64.78		73.34		69.31		58.48		51.90		48.45	b	36.92		52.31
2000	36.55	c	41.07		42.95	a	50.98	d	61.05	b	67.77	b	74.34	b	73.03		62.76	a	49.55	a	31.32		31.23		51.88
2001	32.94		32.32		40.76		50.64	a	58.40		68.54	b	75.00		71.85		65.00		53.84		43.85		34.98		52.34
2002	33.11		35.98		37.95	a	52.87		56.16		70.52		76.81		71.31		64.07		45.92		40.27		36.58		51.79
2003	40.21		31.59		43.66		50.60		57.35		62.83		75.82		72.87		60.50		57.39		38.92		36.35		52.34
2004	35.40		33.93	a	47.97	a	49.18		59.97		62.70		69.16		66.40		62.85		51.87	a	39.67		36.45		51.30
2005	35.44		37.88		41.97		48.40		57.63		65.42		75.05		69.71		66.18		53.10		44.55	a	33.47	a	52.40
2006	40.66		33.68		39.39		53.88		60.95		71.57		74.37		71.56		58.40		50.98		43.37		35.31		52.84
2007	27.23		34.59		47.56		47.82		58.00		67.65		74.76		73.56		64.43		55.19		44.87		30.06		52.14
2008	31.63		36.10		40.98	a	47.80		57.03		66.02		75.02		69.63		60.90		51.81		46.03		31.10		51.17
2009	38.16		39.66		44.21		47.30		59.31		62.93		69.53		69.48		63.10		44.47		43.77		26.66		50.72
2010	33.02		30.21		42.68		48.75		53.90		66.93		72.45		72.42		66.55		54.92		39.77		37.19		51.57
2011	33.05		31.93		45.21		48.86	a	53.66		67.57		73.50		75.13		63.32		52.89		42.32		32.13		51.63
2012	38.84		32.21		50.84		54.33		60.15		74.13		74.79		73.19		65.93		50.81		46.08		33.68		54.58
2013	32.98		32.11		40.48		43.73		57.63		69.82		72.19		72.18		65.12		47.81		43.18		31.50		50.73
2014	34.63		32.00		43.56		49.80		56.53		66.23		72.18		69.16		63.77		55.29		38.33		33.84		51.28
2015	36.42		36.55		46.06		50.02		52.44		68.28		70.34		71.84		68.12		56.16		40.77		33.10		52.51
2016	34.11		40.84		42.97		49.02		54.03		70.45		73.95		70.35		64.92		58.74		47.47		31.95		53.23
2017	32.15		42.34		50.26		48.90		55.71		68.70		73.92		68.94		63.52		51.52		47.47		36.39		53.32
2018	37.69		32.48		43.35		49.10		59.73		69.85		72.45		70.92		66.70		50.42		39.37		33.76		52.15
2019	34.92		30.95		37.19		50.17		51.21		64.55		73.02		73.79		67.73		45.71		39.07		35.65		50.33
2020	36.16		32.41		43.02		47.62		58.98		69.32		73.76		74.16		64.73		50.42	a	44.75		35.85		52.60
2021	34.63		28.00		40.39		46.67		55.29		69.38		72.94		72.06		67.50		53.58		48.02		40.42		52.41
2022	33.84		30.66		41.65		48.97		57.18		68.27		74.92		72.74		66.97		53.24		35.90		31.98		51.36
2023	30.10		34.30		36.92		48.08		57.66		63.27		72.56		71.87		65.37		51.55		44.57		38.29		51.21
2024	30.18		38.86		41.85		50.17	g	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	36.96	i
Period of Record Statistics
MEAN	32.95		34.76		40.80		48.76		57.34		66.75		72.58		71.18		63.40		52.59		41.63		34.30		51.51
S.D.	4.69		5.07		4.50		3.26		2.88		3.23		2.42		2.26		3.01		3.52		3.86		4.25		1.41
SKEW	-0.70		-0.53		-0.02		-0.02		-0.18		-0.03		0.02		-0.14		-0.04		-0.53		-0.09		-0.67		0.31
MAX	43.47		47.59		54.05		56.67		64.57		74.95		78.29		76.60		70.83		61.94		53.07		44.38		56.04
MIN	16.40		18.02		29.15		39.67		49.42		58.40		67.10		65.27		55.30		41.00		31.32		19.90		48.46
YRS	123		124		126		127		124		126		126		125		125		126		122		122		106