CHATHAM, MA

Average of Average Temperature (Degrees Fahrenheit)

(191386)

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
1972	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	66.26		63.03		50.35		42.82		38.44		52.18	g
1973	31.85		31.30		40.47		45.47		51.90		62.55		66.85		69.13		62.67		54.90		44.12	a	39.84		50.09
1974	34.26		31.02		37.15		46.15		51.39		59.83		67.69		68.90		63.18		50.42		44.68		37.89		49.38
1975	35.95		32.50		36.02		41.90		53.82		61.17		68.60		68.39		61.30		55.76		49.27		36.68		50.11
1976	28.94		35.34		39.43	c	48.47	a	54.40		63.18		68.06		67.29		62.37		51.42		40.13		30.40		49.12
1977	24.42		29.77		39.94		46.52		54.48		60.37		68.24		68.50		61.43		53.31		46.67		34.92		49.05
1978	30.19		27.54		34.37		43.47		51.87		62.30		65.37		68.79		59.58		52.10		45.47		35.82		48.07
1979	33.27		23.57		38.73		44.22		55.77		60.60		67.53		65.85		61.63		52.18	a	48.72		38.39		49.21
1980	31.87		28.47		36.18		45.92		53.65		60.52		68.85		69.95		63.83		52.10		42.12		31.40		48.74
1981	23.03		35.11		36.79		47.17		52.85		63.68		69.69		67.15		61.87		51.24		44.38		35.60		49.05
1982	25.31		32.11		37.34		42.85		53.12	b	58.50		68.26		65.94		61.68		53.68		47.40	i	40.87		49.06	a
1983	35.05	b	35.00	b	39.47		45.22		52.32	a	62.50		69.98		68.31		65.95	a	54.84		46.98	h	34.76		51.22	a
1984	31.52		37.19		33.32		43.70		54.66		62.92		67.34		69.81		61.03		54.97		45.52		40.71		50.22
1985	28.30	i	33.50	b	38.78	a	-----	z	53.85		61.50		67.29		67.27		63.55		55.50		48.03		33.95		52.32	b
1986	32.86	b	30.98		38.69		45.70		-----	z	61.46	c	66.97		-----	z	-----	z	-----	z	-----	z	-----	z	46.11	f
1987	32.48		29.45		37.06		45.02		52.35		62.35		66.13		-----	z	62.69	c	52.21	g	-----	z	37.00		47.17	c
1988	29.55		33.38		37.50		44.80	b	52.73		60.85		68.15		70.52	a	62.12		50.76		46.50		34.05	a	49.24
1989	34.42		31.18		36.55	a	44.34	a	-----	z	63.15		67.16		67.44		63.25		54.48		43.98		24.92		48.26	a
1990	36.74		34.59		37.87		44.68		51.90		60.98		67.40		70.00		62.87		57.08		45.87		40.62	b	50.88
1991	33.06		34.95		39.97		47.06	c	57.23	c	64.25		-----	z	69.42		61.97		55.44		46.30	c	37.09	d	49.70	a
1992	-----	z	32.69		34.79		41.88		51.34		62.08		65.37		-----	z	61.35		52.10		-----	z	37.19		48.76	c
1993	33.47		28.38		36.00		44.30		54.55		62.47		69.05		68.11		62.75		52.45		46.02		36.34		49.49
1994	26.47		29.34		37.42	a	47.33		52.40		63.80		70.61		68.08		61.95	b	54.11		50.38	f	40.14	b	50.15	a
1995	-----	z	32.16	i	-----	z	-----	z	50.98	b	61.45	a	69.60	a	69.52	a	61.92	e	58.00	a	44.31	d	33.38	b	56.14	d
1996	32.12	c	31.31	c	34.93	c	44.81	a	52.71	b	62.77		66.53	a	66.69	b	62.62		55.37	a	42.07	a	41.77	c	49.47
1997	30.64	b	35.93	a	37.02	d	43.98	d	52.69		61.73	b	70.45	b	68.02	a	64.06	c	53.55	a	43.50		37.40	b	49.91
1998	36.45	b	36.67	b	39.17	a	46.78	a	54.32		60.80		69.09	c	68.21	b	64.13		54.02	c	45.43	a	41.09	c	51.35
1999	33.05	a	34.68	c	-----	z	46.08		55.18		64.98		72.70	c	68.73		65.41	c	52.83	b	46.56	e	39.37		52.69	a
2000	29.59	d	34.26	b	41.55	a	46.46	d	54.20	c	63.18	b	66.93	b	67.35	a	-----	z	53.91	c	44.00	b	-----	z	50.14	b
2001	32.38	c	32.70	w	39.04	q	44.48	a	54.82	a	65.79	b	67.38	c	69.90	a	63.72	a	55.91	b	48.41	a	41.92		54.47	b
2002	36.82	a	35.62	b	40.03	b	-----	z	53.55	b	61.62	a	69.82	a	71.42	a	65.21	f	53.86	b	44.45		35.28	a	50.25	b
2003	26.67	a	30.85	k	36.12	a	41.48	a	51.68		60.52		70.02		70.08		63.92		53.33	b	46.67		37.50	a	50.72	a
2004	22.55	a	30.80	a	36.77	a	44.60		54.39		61.62		66.63		67.94		-----	z	54.50	c	46.56	c	38.34	i	48.63	b
2005	29.85	a	32.05		34.18		45.72		49.82		61.97	a	68.66		70.98		67.30		55.50	a	47.53		35.40		49.91
2006	37.65		32.15	a	36.58		47.13		54.08		63.45	b	70.79		70.13		63.70		54.15		50.28		41.93	a	51.83
2007	34.34		26.91		36.44		43.67		55.94		63.43		69.32		69.52	a	65.73		58.50	a	44.42		35.02		50.27
2008	33.97	a	34.02		37.73		46.23		53.11		66.47		72.16		69.00		66.66	a	51.80	i	43.35		37.29		50.91	a
2009	27.03		31.33	b	36.26		44.09	m	53.70	d	58.71	d	66.32		70.10		62.50		51.73		48.98		34.32		49.18	a
2010	29.71		31.50		40.80	a	48.22		56.63		64.52	a	71.58		68.77		64.87		54.58		44.72		32.90		50.73
2011	29.35		30.25		36.94		46.47		53.31		62.58		70.60		69.18		64.78		56.97		48.87		40.48		50.81
2012	35.03		36.05		41.76		48.55		55.31		64.90	o	71.79		70.82	a	64.38		56.31		44.63		40.56		51.38	a
2013	31.27	a	31.84		37.21		44.72		54.17	b	63.37		71.34		68.16		62.20		52.88	j	43.22		35.79		49.39	a
2014	28.52		30.48		32.31		43.97		53.31		62.08		66.94		65.98		65.28		56.85		44.12		41.52		49.28
2015	30.32		24.21		33.17	b	45.77		56.82		61.17		69.53		71.24		67.83		54.84		49.58		46.60		50.92
2016	34.34		34.62		41.47		45.28		55.06		63.77		70.92		72.97		66.58		56.73		47.03		38.08		52.24
2017	36.74		36.36		34.73		47.65		53.27		62.87		68.47		68.73		64.47		60.48		46.07		33.61		51.12
2018	31.03	b	37.64		37.48	h	44.21	b	54.94		62.18		68.57	a	72.24		66.08		53.68		44.10		36.21		51.90	a
2019	31.84		30.95		35.79		46.47		51.94		61.87		71.59	b	70.21		64.07		55.63		43.48		36.25	a	50.01
2020	35.69		36.59		40.52		43.25		52.73		63.29	b	70.48		71.24		64.77		56.71		48.28		39.03		51.88
2021	34.32	a	33.25		38.10		-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	35.22	i
Period of Record Statistics
MEAN	31.65		32.32		37.41		45.28		53.59		62.28		68.78		68.96		63.53		54.38		45.61		37.17		50.09
S.D.	3.70		3.23		2.31		1.71		1.60		1.61		1.87		1.65		1.83		2.21		2.28		3.69		1.04
SKEW	-0.63		-0.61		-0.02		-0.15		0.14		0.12		0.17		0.12		0.39		0.28		0.09		-0.49		0.32
MAX	37.65		37.64		41.76		48.55		57.23		66.47		72.70		72.97		67.83		60.48		50.28		46.60		52.24
MIN	22.55		23.57		32.31		41.48		49.82		58.50		65.37		65.85		59.58		50.35		40.13		24.92		48.07
YRS	46		46		45		44		46		47		47		46		45		45		43		46		27