IRON MOUNTAIN, CA

Minimum of Minimum Temperature (Degrees Fahrenheit)

(044297)

File last updated on April 24, 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	30.00	j	36.00		39.00		46.00		54.00		63.00		69.00		74.00		65.00		42.00		40.00		39.00	c	30.00	m
1936	34.00		32.00		41.00		43.00		61.00		60.00		71.00		71.00		59.00		54.00		33.00		35.00		32.00
1937	21.00		33.00		41.00		48.00		57.00		66.00		77.00		74.00		67.00		57.00		44.00		35.00		21.00
1938	38.00		34.00		40.00		46.00		51.00		66.00		70.00		70.00		70.00		50.00	a	40.00		39.00		34.00	a
1939	38.00	a	32.00		38.00		45.00		61.00		62.00		69.00	b	78.00	a	62.00		49.00	a	46.00	c	35.00	e	32.00	m
1940	36.00	b	40.00		45.00	b	46.00		65.00	a	70.00		67.00	a	70.00	d	66.00		48.00		40.00	b	35.00	h	35.00	t
1941	38.00		44.00	e	44.00	a	48.00	b	56.00		65.00	d	72.00		68.00		57.00		48.00		38.00		35.00		35.00	l
1942	30.00	a	31.00		43.00		51.00	a	56.00		61.00		71.00	a	66.00		64.00		46.00		44.00		37.00	a	30.00	d
1943	30.00		38.00		47.00	a	49.00		55.00	a	53.00		68.00		72.00		64.00		48.00		39.00		37.00		30.00	b
1944	28.00	a	33.00	b	41.00	c	47.00		51.00		60.00	a	72.00		70.00		62.00	a	58.00	a	37.00		38.00		28.00	i
1945	33.00		35.00		41.00		42.00	a	61.00		63.00	a	73.00		75.00		62.00		53.00		41.00	a	33.00	a	33.00	d
1946	37.00		33.00		41.00		47.00		59.00		72.00		75.00		74.00		68.00		43.00		41.00		33.00		33.00
1947	34.00		41.00		46.00		51.00		57.00		70.00		76.00		68.00		64.00		51.00		35.00		36.00		34.00
1948	29.00		29.00		39.00		49.00		51.00		58.00		71.00		73.00		56.00		53.00		40.00	i	32.00		29.00	i
1949	27.00		29.00		42.00		43.00		52.00		60.00		73.00	a	68.00		66.00		42.00		47.00		29.00		27.00	a
1950	25.00		32.00		41.00		51.00		52.00		58.00		72.00		71.00		63.00	a	57.00		36.00		38.00		25.00	a
1951	33.00	a	34.00		37.00		45.00		48.00		63.00		73.00		68.00		66.00		45.00		39.00		29.00		29.00	a
1952	27.00		37.00		38.00		51.00		60.00		65.00		73.00		77.00		62.00		56.00		33.00		35.00		27.00
1953	39.00		33.00		37.00		45.00		51.00		60.00		79.00		69.00		60.00		54.00		36.00		29.00		29.00
1954	30.00		43.00		40.00		49.00		52.00		60.00		74.00	a	69.00		61.00		52.00		42.00		31.00		30.00	a
1955	33.00		33.00		40.00		37.00		49.00		55.00		72.00	a	70.00		61.00		58.00		38.00		36.00		33.00	a
1956	33.00		33.00	a	34.00		47.00		59.00		66.00		70.00		71.00		70.00		42.00		37.00		33.00		33.00	a
1957	34.00		35.00		43.00		47.00		54.00		68.00		71.00		69.00		66.00		49.00		41.00		39.00		34.00
1958	34.00	a	39.00		36.00		40.00		57.00		66.00		74.00		75.00		65.00	a	52.00		36.00		39.00		34.00	b
1959	35.00		36.00	a	44.00		56.00		55.00	a	69.00		73.00	a	67.00	a	58.00		46.00		41.00		40.00		35.00	d
1960	27.00		30.00		44.00		48.00		57.00		71.00		75.00		72.00		64.00		53.00		42.00		33.00		27.00
1961	36.00		39.00		41.00		50.00		58.00		62.00		75.00		72.00		59.00		48.00		37.00	a	32.00		32.00	a
1962	24.00		35.00		31.00		50.00		53.00		57.00	a	76.00	a	71.00		65.00		54.00		46.00		35.00		24.00	b
1963	24.00	a	40.00		41.00		42.00		48.00		59.00		73.00		74.00		63.00		58.00	a	41.00		34.00		24.00	b
1964	28.00		31.00		37.00		42.00		44.00		64.00	b	74.00		72.00		65.00		59.00		35.00		31.00		28.00	b
1965	33.00	a	29.00	a	38.00		46.00		53.00		53.00	a	76.00		71.00		59.00		54.00		41.00		34.00		29.00	c
1966	30.00		30.00		42.00		50.00		56.00		66.00	b	73.00		69.00	a	68.00	a	52.00		40.00	a	36.00		30.00	e
1967	34.00		38.00		40.00		41.00		49.00		56.00		76.00		76.00	b	68.00		51.00		40.00		31.00	b	31.00	d
1968	34.00		43.00		38.00		40.00		52.00		60.00		69.00		64.00		60.00		56.00		42.00		25.00		25.00
1969	32.00		39.00		37.00		45.00		54.00		63.00		70.00		76.00	a	65.00		51.00		35.00		32.00		32.00	a
1970	28.00		38.00		41.00		41.00	a	56.00		63.00		70.00		70.00		62.00		47.00	a	42.00		35.00		28.00	b
1971	22.00	a	37.00	a	33.00		49.00		50.00		61.00		74.00		60.00		57.00		33.00		40.00	a	31.00		22.00	c
1972	33.00		39.00		43.00		46.00		56.00		65.00		72.00		72.00		64.00		49.00		43.00		22.00		22.00
1973	27.00		41.00		-----	z	47.00		53.00	a	68.00		78.00	b	65.00		64.00		53.00		36.00		39.00		-----	z
1974	24.00	a	40.00		41.00		52.00		51.00		70.00		72.00		70.00		70.00		47.00		40.00		32.00		24.00	a
1975	29.00		32.00		37.00		43.00		51.00		66.00		75.00		68.00		67.00	a	47.00		31.00		33.00		29.00	a
1976	30.00		44.00		37.00		43.00		59.00		65.00		76.00		69.00		64.00	a	49.00		37.00		34.00		30.00	a
1977	33.00		40.00		39.00		47.00		51.00		68.00		75.00	a	71.00		60.00		54.00		42.00		42.00		33.00	a
1978	38.00		41.00		47.00		48.00		53.00		69.00		75.00		69.00		61.00		53.00		41.00		29.00		29.00
1979	30.00	a	35.00		40.00		47.00		51.00		67.00		69.00		70.00		69.00		46.00		41.00		34.00		30.00	a
1980	38.00		38.00		43.00		43.00		52.00		64.00	a	75.00		68.00		67.00		48.00		41.00		42.00		38.00	a
1981	40.00		37.00		43.00		47.00		59.00		66.00		75.00		71.00		68.00		49.00		39.00		39.00		37.00
1982	33.00		37.00		42.00		44.00	b	58.00		68.00	b	69.00		73.00		58.00	b	51.00		41.00		36.00		33.00	f
1983	37.00		39.00		48.00		45.00		57.00	c	64.00		70.00	a	70.00		63.00		58.00		36.00		34.00	a	34.00	e
1984	38.00		38.00		42.00		46.00		59.00		68.00		70.00		71.00		68.00		50.00		38.00		35.00		35.00
1985	35.00		31.00	a	39.00		51.00		61.00		63.00		75.00		74.00		57.00	a	54.00		36.00	a	31.00		31.00	c
1986	43.00	b	38.00	a	41.00	b	42.00		52.00		68.00		67.00		72.00		50.00	a	53.00	c	44.00	d	34.00	b	34.00	o
1987	32.00	c	37.00	c	39.00	c	50.00	c	57.00	e	72.00	a	70.00	d	68.00		64.00	a	56.00	a	38.00	e	27.00	c	-----	z
1988	33.00	b	35.00		40.00		47.00	a	47.00		63.00	a	77.00		69.00		58.00		62.00	a	39.00	c	30.00	b	30.00	j
1989	29.00	a	27.00		41.00	a	54.00		56.00	a	63.00		75.00		71.00	a	60.00	a	-----	z	41.00	a	36.00		-----	z
1990	35.00	a	24.00		32.00		52.00	a	38.00	b	63.00	a	70.00	a	70.00		65.00	a	52.00	a	30.00	b	25.00	a	24.00	k
1991	33.00	b	39.00		30.00	a	33.00	d	37.00	d	51.00		60.00	a	63.00	b	64.00	a	39.00	b	38.00	d	33.00	b	30.00	w
1992	34.00	f	39.00	b	46.00	a	42.00	b	62.00	a	66.00	e	69.00		61.00	c	56.00	a	54.00	b	35.00	b	32.00	c	-----	z
1993	35.00	c	38.00	c	32.00	a	34.00	f	42.00	c	55.00	f	64.00		60.00	b	60.00	a	46.00	d	28.00	d	30.00	g	-----	z
1994	32.00	b	35.00	b	47.00	a	48.00	b	58.00	a	71.00		68.00		75.00		66.00		48.00	b	31.00		31.00	a	31.00	k
1995	37.00		46.00		30.00		40.00		48.00		57.00	b	76.00		75.00		67.00		48.00		47.00	b	37.00	a	30.00	e
1996	38.00	a	34.00		38.00		46.00	a	53.00	a	66.00		79.00		72.00		66.00		43.00	a	48.00	d	36.00	d	34.00	l
1997	40.00	a	37.00		40.00		46.00		67.00		67.00		66.00		74.00	i	69.00	a	49.00	a	45.00		36.00	d	36.00	p
1998	35.00		42.00		41.00		46.00		54.00		62.00	a	73.00		74.00		61.00	a	52.00		41.00	a	29.00	a	29.00	d
1999	36.00		-----	z	35.00		42.00	c	47.00	a	58.00		71.00	a	71.00		67.00		54.00	c	46.00		39.00		-----	z
2000	39.00	a	43.00	d	38.00	a	54.00	c	57.00		65.00		74.00		67.00	c	65.00	d	51.00	b	37.00	b	38.00		37.00	t
2001	38.00	a	34.00	b	45.00		46.00		61.00	b	69.00	a	69.00		71.00	a	62.00		55.00	a	40.00	a	34.00	c	34.00	l
2002	35.00	c	36.00	a	37.00	b	52.00	a	57.00	c	70.00	b	79.00	b	72.00		62.00	b	48.00	b	45.00	a	34.00		34.00	s
2003	42.00	a	37.00		43.00	a	49.00	e	56.00		69.00		-----	z	73.00	e	70.00	b	54.00	b	35.00		31.00		-----	z
2004	35.00		35.00		45.00	b	52.00		61.00		68.00		72.00		71.00		62.00		48.00		34.00	a	36.00	a	34.00	d
2005	35.00	k	41.00	d	48.00		39.00	a	58.00		65.00		75.00	b	70.00		60.00	a	54.00		40.00	b	32.00	c	32.00	x
2006	37.00	a	40.00	b	39.00	c	46.00	c	53.00		70.00		78.00	a	74.00	a	63.00		51.00	a	37.00	a	34.00	c	34.00	p
2007	22.00	d	36.00	c	46.00	e	42.00	f	62.00	d	61.00		73.00	c	74.00	b	57.00	b	55.00	e	43.00	c	34.00	a	-----	z
2008	35.00	c	36.00	a	41.00	a	52.00	a	52.00	c	66.00	a	74.00	e	75.00	c	66.00	d	52.00	c	50.00	f	36.00		-----	z
2009	37.00	g	38.00		42.00	c	50.00	d	67.00	f	66.00		78.00	d	73.00	e	70.00	d	46.00	a	44.00		33.00	a	-----	z
2010	39.00	b	43.00	a	44.00	a	45.00	d	52.00		73.00	b	75.00	b	69.00		66.00		51.00		32.00		41.00	a	32.00	m
2011	30.00	a	32.00	g	39.00	e	43.00	a	57.00		64.00		73.00		78.00	f	64.00	a	52.00	a	43.00		35.00		30.00	v
2012	37.00		41.00		42.00	b	47.00	a	58.00		69.00		74.00	c	73.00		70.00		55.00	c	44.00	i	36.00	c	36.00	u
2013	29.00	e	35.00		46.00		53.00	e	59.00	h	73.00		70.00	a	71.00	d	59.00		48.00		45.00	a	34.00	b	-----	z
2014	40.00	j	42.00	d	47.00	c	50.00	e	60.00	g	70.00	f	77.00	a	62.00	c	66.00	a	59.00		39.00		31.00		-----	z
2015	27.00	c	47.00		47.00		53.00	b	51.00		68.00	a	74.00		81.00		70.00	b	61.00	a	35.00	b	30.00		27.00	k
2016	33.00	a	38.00		50.00	e	49.00	b	60.00	e	69.00	f	79.00	g	77.00	d	63.00		63.00	f	41.00	b	36.00		-----	z
2017	39.00	c	39.00	f	46.00	g	52.00	b	61.00	t	63.00		81.00	f	75.00	f	63.00	j	61.00	h	44.00	f	38.00	r	-----	z
2018	41.00	o	33.00		38.00	p	51.00	i	56.00		70.00		74.00		75.00	a	73.00		57.00		46.00	a	41.00		-----	z
2019	33.00		31.00		43.00	a	55.00		51.00	b	69.00	g	75.00		79.00		63.00		40.00		39.00		38.00	b	31.00	l
2020	32.00	a	37.00	b	41.00	d	42.00	b	60.00		61.00	a	73.00		75.00	c	68.00	a	49.00	b	40.00	b	37.00	c	32.00	u
2021	37.00		41.00		42.00	b	56.00	b	62.00	c	70.00		76.00	a	69.00		66.00		48.00		46.00		34.00	a	34.00	i
2022	32.00		34.00		34.00		51.00		53.00		69.00	b	77.00		79.00		71.00	g	50.00	a	42.00	b	33.00	b	32.00	n
2023	36.00	a	41.00	a	38.00	a	45.00	e	58.00	h	67.00	a	79.00		70.00	d	68.00	b	55.00	b	47.00		41.00		36.00	y
2024	33.00		42.00		44.00		-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
Period of Record Statistics
MEAN	32.99		36.64		40.63		46.87		54.52		64.56		72.86		71.00		63.74		50.84		39.62		34.27		29.91
S.D.	4.75		4.42		4.19		4.37		5.34		4.77		3.51		3.99		4.15		5.10		4.24		3.83		4.11
SKEW	-0.46		-0.18		-0.36		-0.29		-0.67		-0.58		-0.67		-0.42		-0.41		-0.54		-0.29		-0.41		-0.34
MAX	43.00		47.00		50.00		56.00		67.00		73.00		79.00		81.00		73.00		62.00		48.00		42.00		38.00
MIN	21.00		24.00		30.00		33.00		37.00		51.00		60.00		60.00		50.00		33.00		28.00		22.00		21.00
YRS	84		87		87		86		84		85		86		86		87		86		85		86		43