CHATHAM, MA

Total of Precipitation (Inches)

(191386)

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
1972	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	1.43		10.84		3.55		4.98		6.73		27.53	g
1973	1.85		3.82		3.11		5.93		3.29		5.20		9.05		2.91		4.02		6.77		3.24		5.19		54.38
1974	4.54		4.22		1.75		4.31		4.14		3.57		0.87		3.62		4.56		2.22		3.16		3.54		40.50
1975	6.49		3.88		4.42		3.82		1.76		2.36		3.22		4.18		5.56		5.01		6.49		7.67		54.86
1976	6.87		2.77		3.20		2.11		1.65		1.19		4.59		2.35		2.45		7.12		1.97		4.48		40.75
1977	5.92		2.29		3.89		3.78		2.36		7.30		1.33		2.93		6.50		4.96		2.04		8.55		51.85
1978	6.78		1.45		3.00		2.67		5.77		2.51		4.14		3.46		1.85		2.64		2.41		5.20		41.88
1979	6.57		5.71		2.66		3.43		5.93		1.42		1.00		5.02		2.15		3.72		4.22		3.52		45.35
1980	4.71		1.21		5.32		3.47		2.40		3.07		1.56		2.23		2.39		2.91		4.04		5.25		38.56
1981	2.00		5.80		1.36		3.63		3.35		5.12		2.99		2.08		4.09		3.79		3.94		8.06		46.21
1982	4.33		16.58		3.43		4.07		2.06		5.49		1.58		3.64		6.80		6.30		4.65	a	3.19		62.12
1983	2.67		6.40		9.84		7.64		4.87		2.91		1.51		5.29		0.80	a	5.38		4.38		4.29		55.98
1984	2.57		5.76		7.50		3.16		5.40		3.88		7.97		1.49		1.68		4.95		1.06		3.19		48.61
1985	1.61		2.74		4.33		-----	z	5.51		6.81		2.76		7.80		2.39		2.15		4.24		1.53		41.87	a
1986	2.44		3.15		3.08		2.03		1.85		3.34		9.93		-----	z	-----	z	-----	z	-----	z	-----	z	25.82	e
1987	5.93		4.13		4.41		7.26		4.35		1.45		1.33		-----	z	7.42		2.60		-----	z	4.34		43.22	b
1988	3.00		4.99		2.91		2.09		2.36		2.31		4.46		1.04		1.28		6.09		8.13		1.35		40.01
1989	1.63		3.47		3.73		5.73		-----	z	3.48		5.56		1.67		4.54		5.10		4.59		1.78		41.28	a
1990	5.36		4.21		2.92	a	3.93		7.09		2.71		4.31		0.94		2.08		3.41		1.61		3.74		42.31
1991	3.10		2.35		4.73		3.81		1.53		1.90		-----	z	3.44		4.83		4.62		4.93		3.02		38.26	a
1992	-----	z	2.21		3.46		2.48		1.64		4.27		2.84		-----	z	2.03		1.29		-----	z	7.22		27.44	c
1993	1.98		3.92		5.98		4.48		1.85		2.40		2.39		0.26		3.54		4.70		3.10		7.66		42.26
1994	5.35		3.05		7.35		4.10		5.02		1.88		1.18		4.81		4.10		1.69		2.67		5.98		47.18
1995	-----	z	2.86		-----	z	-----	z	3.84		3.76		2.00		1.82		2.50		4.91		6.74		2.46		30.89	c
1996	7.01		3.74		2.65		5.65		2.91		3.11		2.49		7.17		11.91		6.27		1.30		4.95		59.16
1997	2.83		2.88		1.98		7.52		3.23		3.12		3.05		4.48		2.09		2.75		5.77		5.37		45.07
1998	11.27		8.35		5.99		4.39		2.27		5.58		3.36		3.95		2.67		3.16		1.69		0.94		53.62
1999	3.93		4.16		-----	z	1.40		5.74		0.30		2.07		3.67		4.94		6.47		2.00		5.27		39.95	a
2000	4.23		3.19		4.86		5.29		2.69		2.05		4.62		5.19		-----	z	2.55		3.96		-----	z	38.63	b
2001	3.79		3.09		10.41		2.80		2.41		4.61		5.12		5.99		0.68		1.67		1.00		3.35		44.92
2002	4.67		2.18		5.75		-----	z	4.02		3.40		0.49		2.52		6.87		1.92		7.93		6.62		46.37	a
2003	2.52		7.70		6.41		4.26		2.27		5.62		1.85		3.35		3.88		4.90		3.49		5.07		51.32
2004	1.71		3.72		3.00		7.03		2.78		1.71		2.24		1.47		-----	z	1.83		4.74		4.33		34.56	a
2005	4.69		2.02	a	4.60		3.68		7.03		0.04		3.83		0.89		3.88		6.46	b	3.78		4.27		45.17
2006	4.62		1.55		0.74		2.67		7.01		11.71		2.65		2.08		2.25		2.46		6.46		3.32		47.52
2007	3.81		1.49		4.01		7.90		2.98		0.70		2.79		1.12		2.91		1.75		7.68		5.21		42.35
2008	3.40		4.79		4.63		3.72		5.49		1.86		3.30		2.03		7.54		2.62		4.36		5.77		49.51
2009	4.29		2.19		3.84		2.89	m	2.54		3.43		6.62		5.49		2.16		6.94		2.25		5.16	a	44.91	a
2010	4.05		3.74		7.94	a	1.44		2.80		2.23	a	2.95		4.99		4.83		5.54		3.38		5.10		48.99
2011	5.07		3.57		1.82		4.33		2.07		3.35		4.86		3.58		2.05		7.75		4.29		2.52		45.26
2012	3.56		1.68		1.52		1.18		4.36		1.99		2.53		2.63		3.98		2.48		2.37		5.58		33.86
2013	1.60		7.01		4.95		3.68		4.34		7.20		4.36		1.22		1.72		0.95	h	4.33		3.91		44.32	a
2014	3.60		6.37		3.04		2.28		1.85		2.62		3.52		2.57		1.73		4.98		8.73		6.85		48.14
2015	4.40		3.92		4.71	a	1.26		0.91		3.31		1.98		3.42		2.17		6.98		5.98		5.14		44.18
2016	5.04		6.62		3.48		4.61		3.58		0.82		2.71		0.97		2.30		7.55		1.73		2.02		41.43
2017	4.45		3.37		3.41		5.33		4.83		2.74		2.09		6.24		6.34		5.35		1.80		2.51		48.46
2018	3.84		6.47		7.27	d	3.01		1.73		3.60		1.12		1.63		3.29		7.01		7.73		3.89		50.59
2019	4.57		2.53		3.83		5.53		3.80		5.83		1.99		1.51		4.94		5.73		3.42		7.93		51.61
2020	1.56		3.80		2.43		5.85		1.43		0.62	a	0.78		1.38		1.62		4.20	a	2.22		6.89		32.78
2021	2.30		4.97		2.32		-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	9.59	i
Period of Record Statistics
MEAN	4.10		4.12		4.21		4.06		3.47		3.33		3.19		3.09		3.81		4.37		4.02		4.68		46.76
S.D.	1.88		2.50		2.09		1.76		1.65		2.14		2.06		1.80		2.43		1.88		2.04		1.90		6.49
SKEW	1.16		2.69		1.04		0.45		0.62		1.43		1.46		0.68		1.42		0.07		0.60		0.09		0.14
MAX	11.27		16.58		10.41		7.90		7.09		11.71		9.93		7.80		11.91		7.75		8.73		8.55		62.12
MIN	1.56		1.21		0.74		1.18		0.91		0.04		0.49		0.26		0.68		1.29		1.00		0.94		32.78
YRS	47		49		47		44		47		48		47		46		46		47		46		47		35