IRON MOUNTAIN, CA

Average of Average Temperature (Degrees Fahrenheit)

(044297)

File last updated on April 23, 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
1935	54.95	k	60.29		61.35		70.90		76.35		91.43		94.02		92.40		87.28		72.71		58.38		55.09	c	74.56	a
1936	54.97		56.83		68.55		78.34	b	83.84		91.32		96.44		94.24		86.25		75.25	a	63.57		53.40		75.25
1937	42.73	a	55.88		62.00		71.45		81.76		89.37		95.61	c	95.55		91.28	a	77.81	b	64.23		59.71		73.95
1938	57.79		56.30		59.94		71.83		79.84		89.39	b	94.48		93.79	e	89.59	a	72.93	a	58.52		56.50		73.41
1939	53.37	a	50.86		64.23		73.87		81.45		88.67		94.41	b	95.52	a	82.16	a	72.73	a	64.24	c	57.81	e	73.28
1940	56.00	b	57.71		66.72	b	72.93	a	84.53	a	92.70		93.75	a	94.43	d	83.70		75.45		59.88	b	56.48	h	76.16	a
1941	53.26		59.91	e	62.45	a	65.89	b	80.50		85.56	d	93.77		89.29		80.17		69.93	c	62.61	b	53.94		71.44
1942	54.80	a	54.86		62.23		70.57	a	78.02		88.42		97.43	a	92.53		85.05		75.68		64.48		56.47	a	73.38
1943	54.76		60.14		64.70	a	73.07		81.77	a	83.82		94.79		91.61		88.62		75.74		62.63		55.56		73.93
1944	52.70	h	54.11	b	61.36	c	68.57		78.31		82.55	a	91.77		93.13		86.38	a	75.98	a	58.75		55.58		73.32	a
1945	53.56		57.80		58.98		69.33	a	80.63		85.93	a	95.02		92.16		88.18		76.50		61.76	a	51.77	a	72.64
1946	54.81		54.62		63.42		75.42		80.10		90.55		93.24		93.63		87.98		69.87		57.45		57.06		73.18
1947	52.19		61.61		66.65		73.00		83.50		87.40		94.68		90.21		88.65		74.66		57.95		52.02	a	73.54
1948	54.52	a	54.10		57.81		71.47		78.42		86.87		92.66		91.89		87.03	a	75.15		58.73	j	49.90		72.71	a
1949	41.95		51.02		60.81		73.07		77.40		89.15		94.43	a	91.60		90.02		72.19		68.30		51.97		71.83
1950	48.63		60.11		65.02		75.65		78.71		87.17		93.34		93.32		84.97	a	78.85		66.57		60.87		74.43
1951	53.40	a	56.32		62.81		70.73		79.35		86.67		95.08		91.72	a	88.20		74.21		59.88		50.53		72.41
1952	49.11		56.59		57.27		71.00		83.42		85.20		93.19		95.42		88.50		81.03		59.50		52.56		72.73
1953	58.77		57.29		64.02		70.15		72.52		86.85		96.92		93.35		88.77		75.16		65.08		54.00		73.57
1954	52.44		65.30		60.84		76.48		82.13		86.98		95.38	a	90.90		87.93		77.19		66.75		54.31		74.72
1955	49.34		53.34		62.55		67.58		76.82		87.00		91.70	a	91.02		87.43		78.81		62.67		56.76		72.08
1956	56.24		52.73	a	63.97		70.55		79.82		90.30		93.97		91.66		91.05		73.19		61.25		56.60		73.44
1957	51.81		62.32		65.05		70.88		75.84		92.07		95.60		92.34		87.23		71.24		58.02		55.79		73.18
1958	54.78	a	59.38		58.19		70.70		84.85		89.92		94.42		95.13		89.26	a	79.40		62.97		59.27		74.86
1959	56.76		55.04	a	66.81		76.13		78.98	a	92.55		98.22	a	91.92	a	85.52		76.55		63.68		55.15		74.77
1960	48.85		53.90		67.24		73.60		79.58		93.72		96.74		94.11		89.02		74.03		61.93		53.27		73.83
1961	57.03		59.14		63.84		72.80		78.90		93.23		95.84		91.92		82.12		73.55		58.28	a	52.08		73.23
1962	53.87		57.96		57.61		77.73		76.53		88.60	a	94.55	a	95.52		88.43		75.79		66.27		57.24		74.18
1963	49.88	a	64.14		62.27		66.40		80.76		83.70		94.92		92.76		87.12		77.18	a	62.98		55.11		73.10
1964	50.40		53.83		59.76		68.78		77.08		85.66	b	94.48		92.87		85.27		80.92		58.28		54.35		71.81
1965	55.62	a	57.50	a	60.73		68.95		77.19		82.12	a	93.32		93.48		82.08		78.48		63.75		52.73		72.16
1966	50.08		52.88		63.89		74.63		82.60		89.11	b	94.31		95.10	a	87.36	a	74.27		63.78	a	56.08		73.67
1967	54.61		59.11		64.31		62.93		79.11		85.37		96.90	a	96.95	b	86.45		77.98		66.60		50.59	b	73.41
1968	54.45		63.41		65.16		68.25		79.03		89.13		93.93	a	89.19		87.07		75.24		63.37		49.84		73.17
1969	56.13		55.73		61.44		71.03		82.10		86.25		93.73		97.47	a	88.22		71.58		64.08		55.82		73.63
1970	52.39		60.88		62.37		65.33	a	80.42		89.13		94.19		93.94		84.08		72.60	a	63.35		52.13		72.57
1971	53.47	a	59.00	a	63.45		69.63		73.85		87.75		96.58		91.00		85.52		68.26		60.02	a	50.03		71.55
1972	51.24		60.67		71.85		72.53		79.71		88.40		96.39		91.26		84.77		69.03		58.18		50.66		72.89
1973	50.34		56.82		-----	z	69.73		82.93	a	92.30		96.45	b	93.10		85.42		75.34		61.00		56.90		74.58	a
1974	51.77	a	57.70		65.58		70.48		81.00		93.20		93.45		92.74		89.40		75.90		63.15		51.66		73.84
1975	53.44		54.96		60.60		63.82		78.58		88.70		95.11		92.52		88.33	a	73.44		62.30		57.34		72.43
1976	56.60		60.33		62.16		67.40		81.45		89.20		93.63		90.02		82.28	a	73.44		63.85		54.00		72.86
1977	52.97		61.62		58.76		72.93		72.56		91.55		96.05	a	93.82		85.88		76.87		65.30		58.47		73.90
1978	53.69		58.41		66.06		68.95		79.29		91.75		96.24		92.18		84.55		79.24		59.63		49.16		73.26
1979	46.68	a	53.59		61.06		70.37		79.23		89.75		93.31		89.40		89.75		76.45		60.13		56.05		72.15
1980	56.61		60.29		61.32		70.37		74.15		87.71	a	96.37		92.50		87.08		76.69		64.95		60.81		74.07
1981	59.45		59.86		63.97		75.60		79.73		94.37		96.63		94.87		88.43	b	72.29		65.50		57.50		75.68
1982	53.19		60.16		62.34		71.38	b	78.87		85.29	b	91.11		91.31		83.18	b	71.63	a	65.10	y	49.45	u	74.85	b
1983	55.68		58.14		63.24		66.03		80.09	c	87.05		93.03	a	89.32		89.07		74.65		62.80		56.13	a	72.94
1984	56.79		58.91		66.34		70.45		85.53		88.08		93.19		92.02		88.85		70.97		60.52		51.50	a	73.60
1985	53.58		56.72	a	62.16		75.73		81.50		91.97		96.21		93.88	a	79.76	a	73.73		60.00	a	56.08		73.44
1986	59.84	b	60.09	a	67.95	b	70.57		79.19		91.80		91.44		94.90		80.45	a	72.48	c	64.54	d	54.43	b	73.97
1987	53.04	c	60.28	c	63.27	c	76.50	c	81.06	e	92.43	a	92.27	e	93.73		86.83	a	77.32	a	60.34	e	49.79	c	73.90
1988	52.91	b	59.79		65.39		70.55	a	81.38	b	89.00	a	97.18		92.47		86.47		81.72	a	63.76	c	55.05	b	74.64
1989	53.63	a	58.20		69.35	a	79.93		82.43	b	90.45		97.10		92.17	a	87.79	a	-----	z	66.22	a	56.82		75.83	a
1990	54.07	b	56.34		66.87		74.33	a	79.34	b	90.41	a	94.98	a	91.19		87.29	a	76.93	a	64.00	b	49.52	a	73.77
1991	52.57	b	64.05		57.03	a	68.21	d	76.00	d	84.37		91.88	a	91.34	b	87.07	a	79.41	b	63.92	e	53.90	b	72.48
1992	54.62	f	60.46	b	63.17	a	74.70	b	82.33	a	88.36	e	92.26		94.23	c	87.78	a	75.76	b	60.34	b	49.61	c	75.36	a
1993	52.88	c	56.92	c	66.10	a	70.06	f	80.73	c	85.71	f	90.60		91.32	c	85.60	a	74.26	d	56.08	e	51.54	g	72.72	c
1994	54.97	b	55.85	b	67.70	a	74.46	b	79.42	a	93.47		94.82		95.71		88.82		72.74	b	55.50		53.62	a	73.92
1995	54.35		64.21		64.58		69.72		75.80	a	88.44	c	95.90		97.77		91.40		77.02		68.64	b	56.80	a	75.39
1996	56.87	a	63.14		66.77		75.36	a	84.22	a	91.67		98.35		95.89		86.97		76.53	a	64.98	e	55.02	d	76.31
1997	55.98	a	59.66		70.19		72.95		88.85		89.20		92.89		95.89	i	89.29	a	74.37	a	64.25		53.28	d	73.72	a
1998	56.08		55.66		63.84		67.80		75.84		85.55	a	96.90		96.27		85.41	a	73.45		62.43	a	54.52	a	72.81
1999	57.77		-----	z	61.27		66.79	d	79.60	a	89.05		93.40	a	93.18	c	86.88	a	78.48	c	66.08		56.73		75.39	a
2000	58.35	a	60.28	d	64.05	a	77.22	c	85.26		91.95	b	95.39	c	93.89	c	87.06	d	73.57	b	57.46	b	57.31		75.15
2001	53.23	a	55.35	b	66.69		70.08		87.36	b	92.31	a	93.68		94.20	a	89.43		77.77	a	66.22	a	51.80	c	74.84
2002	55.20	c	59.80	a	63.69	b	75.09	a	80.88	c	92.73	b	97.66	b	94.03		88.09	b	74.67	b	66.17	a	54.37		75.20
2003	61.93	a	59.33	a	65.62	a	69.12	e	83.13		91.00		-----	z	95.38	e	90.54	b	82.53	b	58.98		55.11		73.88	a
2004	55.60		56.73	a	72.64	b	73.85		83.05		91.08		96.26		94.00		86.30		72.60		58.36	a	54.95	a	74.62
2005	54.62	k	57.50	e	65.95		70.05	a	82.76		89.00		97.72	b	93.85		85.81	a	75.65		65.70	b	54.79	c	76.25	a
2006	56.35	a	60.96	b	60.46	c	70.31	c	85.68		94.48		98.03	a	94.33	a	86.55		73.87	a	65.79	a	53.86	c	75.06
2007	53.50	f	61.84	c	67.98	e	73.71	f	84.33	d	91.67		97.34	c	95.71	b	87.04	b	75.33	e	67.24	c	52.27	a	78.07	b
2008	52.79	c	58.10	i	66.13	a	73.47	a	78.34	c	92.64	a	94.96	e	94.96	c	88.98	d	77.62	c	67.73	f	53.69		77.36	b
2009	59.27	g	58.38		65.62	c	72.60	d	88.80	f	87.35		98.81	d	94.15	e	91.35	d	73.28	a	65.48		52.43	a	75.95	b
2010	55.53	b	59.33	a	62.92	a	68.48	d	76.71		90.86	b	97.55	c	94.23		88.31	a	75.75	a	62.77		58.09	b	74.21
2011	56.35	a	56.84	i	67.17	h	72.81	a	78.10		89.05	a	94.34	c	96.67	g	88.82	b	76.64	b	60.88		52.05	b	74.34	c
2012	58.03		60.19	b	65.45	c	74.12	b	85.26		92.13		93.87	e	95.57	b	90.38	a	77.60	e	66.16	k	55.69	e	77.12	a
2013	55.21	g	57.20		70.76		75.58	f	83.19	m	93.71	a	96.98	b	93.29	g	86.72		71.85		63.57	a	55.17	e	74.49	d
2014	62.12	o	64.41	e	68.62	c	75.10	e	82.81	g	91.40	f	96.90	a	91.43	c	90.21	a	79.47		65.30		56.95		76.49	c
2015	56.98	c	65.34		71.15		73.45	b	77.39		93.50	a	92.81		97.79		90.70	b	79.75	a	62.20	b	53.00		76.17
2016	55.38	a	65.72		70.67	e	73.96	b	80.13	e	95.19	f	98.02	g	95.46	e	85.88		80.04	f	71.31	n	-----	z	75.32	e
2017	-----	z	-----	z	-----	z	-----	z	82.00	t	94.45		98.08	f	94.98	f	89.40	j	79.65	h	68.59	g	57.62	r	94.45	k
2018	60.16	o	59.70		63.10	p	78.21	i	82.90		91.65		98.08		97.02	a	91.88		75.55		64.26	a	55.82		79.65	c
2019	55.12	a	52.57		64.63	a	74.63		76.17	d	90.76	g	96.66		97.13		87.43		73.48		64.15		53.53	b	72.32	a
2020	53.85	a	59.31	b	61.69	d	71.86	b	86.02		89.24	a	96.74		100.41	c	93.34	a	79.95	b	63.55	b	56.00	c	76.00
2021	55.53		59.91		61.07	b	76.07	b	82.70	c	93.58		97.27	a	94.18		89.35		72.32		68.80		54.73	a	75.46
2022	55.79		58.59		66.48	a	73.85		81.79		91.45	b	96.47		94.44		91.36	i	78.35	a	61.43	b	54.31	b	73.90	a
2023	54.10	a	55.80	a	61.40	a	72.20	e	82.98	h	86.67	a	101.38	b	95.02	d	87.87	c	79.12	b	64.62		58.23		74.22	a
2024	55.24		59.31		63.73		-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	59.43	i
Period of Record Statistics
MEAN	54.06		58.40		64.02		71.73		80.30		89.48		95.11		93.52		87.25		75.41		62.69		54.54		73.70
S.D.	3.28		3.29		3.39		3.32		3.24		2.93		2.01		2.15		2.62		2.94		3.03		2.66		1.15
SKEW	-1.10		0.02		0.26		-0.15		0.02		-0.34		0.14		0.30		-0.65		0.05		-0.28		-0.03		0.25
MAX	61.93		65.72		72.64		79.93		88.85		94.48		101.38		100.41		93.34		82.53		68.80		60.87		76.31
MIN	41.95		50.86		57.03		62.93		72.52		82.12		90.60		89.19		79.76		68.26		55.50		49.16		71.44
YRS	80		86		86		84		84		85		86		85		87		86		83		84		63