PLAIN, WA

Average of Average Temperature (Degrees Fahrenheit)

(456534)

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
1937	-----	z	-----	z	-----	z	43.36	i	51.71		58.22		66.66		56.56		52.83		43.59	b	33.85		27.66		48.89	d
1938	25.74		25.52		-----	z	42.17	o	50.29		61.60		68.08		61.31		60.37		46.57	a	32.88		30.40		46.28	b
1939	32.23		28.16		38.06		47.03		52.94	e	55.98		64.82	a	64.58		56.23		47.26		38.28		32.19		46.48
1940	27.45		31.24		40.37		45.38		54.23		60.35		64.81		63.21		59.17		48.42		30.73		-----	z	47.76	a
1941	-----	z	35.26	c	42.79		48.68		52.02		58.30		68.92		65.58	a	52.38		46.85		38.68		30.18		49.06	a
1942	25.32		31.87	a	37.82		47.12		51.00		56.50		66.92		66.76		58.47		47.39		33.18		28.87		45.93
1943	16.90	a	33.52	c	-----	z	-----	z	-----	z	-----	z	64.37		61.58		58.58		46.44		37.47		29.08		43.49	d
1944	26.06		30.36	a	36.74		45.08		52.44		59.87		65.90		61.87		59.50		51.42	a	36.30		23.35	a	45.74
1945	31.13	a	34.75		37.13		42.67		53.87		59.23	b	65.13		63.97		54.30		50.77	a	33.68		27.82	l	47.88	a
1946	28.74		32.65	a	38.89		45.88		53.92		54.95		62.73		63.56		54.73		42.85		31.95		30.64	i	46.44	a
1947	-----	z	30.68		40.89		47.20		56.57	h	-----	z	-----	z	60.94		57.10	a	45.83	a	37.30		30.57	b	43.81	d
1948	25.84	f	26.68	a	33.62	g	41.53		49.81		62.13		61.02		61.58		54.43		44.02		35.08		20.52		45.68	b
1949	10.68		22.40	d	35.84		44.35		54.19		54.72		61.94		61.21		55.53		43.60		41.17		27.76		42.78
1950	6.47		25.96		34.10		41.07		49.21	c	57.68		65.31		65.05		57.12		42.63		33.04	p	31.40		43.27	a
1951	24.35	a	27.84		30.82		-----	z	-----	z	58.30		64.31		62.44		55.67		42.74		-----	z	-----	z	45.81	d
1952	18.77	a	28.48		35.56		45.23		52.39	c	55.67		64.21		64.02		58.97		51.29		32.48		28.00		44.59
1953	33.52		35.54	o	36.88	g	43.28		50.05		53.93		62.91	d	63.15	a	56.25		47.90		36.55		33.02		48.06	b
1954	21.69		31.20		32.37	a	40.60	a	51.57	a	54.63		61.46	d	59.76		55.45		43.68		40.28		27.58		43.36
1955	27.44		28.84		30.00		38.15		46.82	a	58.42		62.31		63.02		56.31	a	44.25	a	25.98		19.59	b	41.76
1956	23.32	a	20.94	b	29.94	m	48.00	d	58.46	d	55.22		67.34		65.27		56.50		44.18		31.47		29.69		45.49	a
1957	12.85		27.98		35.17	g	46.41	m	57.21		58.64	a	61.54	d	59.52		59.03		43.87		37.02	b	32.57	h	46.41	c
1958	29.95		36.57		36.55	a	43.73		58.48		63.95		69.84		-----	z	-----	z	-----	z	32.93	a	31.13		44.79	c
1959	26.65		30.41		37.47		45.16	a	49.58		57.27		64.97		61.50		54.32	b	46.31		32.71	a	31.52	i	46.03	a
1960	26.15	k	33.12	e	38.24	l	-----	z	52.00	c	-----	z	68.15		-----	z	53.88		47.68		33.97	a	24.72	d	44.79	e
1961	27.04	c	34.85	d	37.48	c	44.87	k	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	33.12	i
1962	23.43	c	31.30	c	34.75	g	45.62	b	48.57	a	59.75	l	61.93	c	-----	z	57.77	b	-----	z	36.66	b	31.63	d	42.11	d
1963	23.11	c	38.04	e	38.73	a	42.38	j	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	37.39	l	28.45	k	33.29	i
1964	29.33	b	32.93	a	36.56	f	42.36	b	50.25	c	57.56	d	65.67	g	60.52	a	54.19	i	45.94	d	34.21	b	23.81	g	44.14	d
1965	28.26		34.29	b	36.05	a	46.80	b	50.04	d	59.00	c	65.83	b	64.33	e	54.83	d	49.36	b	40.29	b	29.33	p	48.10	a
1966	26.74	l	34.32	c	37.27	c	46.27		54.63	a	57.38	a	62.92	f	64.94	d	62.20	b	46.38	a	38.69	a	32.41	c	47.45	b
1967	33.20	c	37.52	b	38.26	b	42.02	a	52.73	a	62.38	a	65.89	c	69.93	c	62.48	i	49.33	h	-----	z	-----	z	50.24	d
1968	-----	z	-----	z	-----	z	-----	z	51.84		58.03		66.66		61.23		57.43		42.82		35.20		23.13		49.54	d
1969	15.24		26.65	o	36.23		43.10		55.37		63.64	a	63.10		61.95		56.95		44.79		36.93		28.77		46.01	a
1970	25.23		34.39	a	36.81		41.15		52.02		62.68		66.05		64.40		52.68		43.77		33.28		25.68	n	46.59	a
1971	28.39		31.95		32.47		41.78		53.55		55.22		64.92		67.56		52.12		44.48		36.13		25.84		44.53
1972	23.84		28.40		37.19		39.75		53.87	a	59.03		62.02		65.38	a	52.58		45.92		37.15		23.13		44.02
1973	23.71		32.25		40.13		46.13		52.60		57.70		65.52		63.29		57.32		46.15		31.45		31.72	a	45.66
1974	23.26		34.86		36.50		44.25		48.71		60.19	a	62.97		64.65		59.02		47.58		36.88		31.31		45.85
1975	26.37		28.86		34.50		41.23		50.94		57.02		67.31		60.77		57.75		44.53		33.48		30.11		44.41
1976	29.60		31.48		35.18		43.32		52.29		55.17		63.06		62.15		59.17		46.35		37.55		31.32		45.55
1977	24.79		35.36		38.48		48.15		49.56		62.38		62.66		68.24		54.72		45.84		32.43		27.85		45.87
1978	30.10		34.25		39.90		44.80		51.19		61.78		66.08	a	63.42	a	55.12		47.92		31.97		24.26		45.90
1979	15.87		28.79		38.84		45.07		53.29		59.88		66.52		65.68		59.87		50.31		32.55		33.17	a	45.82
1980	19.60		31.90		38.15		48.42		54.02		57.23		64.92		61.52		57.07		47.95		36.37		30.95		45.67
1981	34.34		32.96		42.32		44.88		52.37		55.33		63.84		68.68		57.25		45.50		37.20		28.18		46.90
1982	27.15		29.25		37.15		41.63		51.48	a	61.90		64.48		63.89		57.17	a	45.85		30.82		26.18		44.75
1983	32.34		34.48		40.83	a	45.53		55.20	a	58.43		61.24		66.27		53.70		46.03		36.35		18.85		45.77
1984	30.18		35.09		41.37	a	42.83		48.25	a	57.33		65.06		65.42		53.60		42.98		33.64	a	21.18		44.74
1985	23.52		28.12		37.16		45.05	b	54.35		60.05		70.08		63.53		53.09	a	44.45		25.02	a	20.43	a	43.74
1986	30.44		31.23		41.77		44.30		52.76		62.55	a	60.76		68.18		53.25		48.06		35.63		27.87		46.40
1987	25.74		34.46		38.39		48.32		54.18		62.17	a	64.16	c	64.31		60.55		48.61		38.40	a	25.27	a	47.05
1988	25.30	c	33.68	a	38.70	c	46.42		51.60		57.48		63.74		63.74		56.63		51.45		35.10		27.81		45.97
1989	30.87	a	23.55		35.40		47.52		51.11	c	60.52		63.05		63.05		57.33		46.24		38.83	a	31.34		45.73
1990	31.45		29.98		39.42		48.47		50.45		58.07		67.13	a	65.89		60.75		42.68		37.75		20.50		46.04
1991	25.45		36.68		36.84		43.75		50.34		55.52	a	64.39		65.94		59.68		45.31		33.80		32.15		45.82
1992	30.65		35.41		44.24		46.71	b	56.15		64.32		64.66		65.32		54.70		47.08		34.50		24.15		47.32
1993	21.71		27.64		35.68		43.23		57.35	a	56.88	a	58.58		62.69		58.07		49.61		31.27		28.15		44.24
1994	34.56		28.46		40.23		48.25		54.45	a	57.52		67.50		64.16		60.50		45.11		31.02		26.34		46.51
1995	25.37		33.07		36.47		44.05		54.69		58.32		64.79		58.94		59.70		43.55		35.62	a	28.03	b	45.22
1996	24.95		25.93		37.34		44.20		47.61		57.03		65.79		63.82		54.65		43.90		32.38	a	22.82		43.37
1997	27.26		32.09		36.33	a	41.50		53.32		56.73		62.90		66.00		57.93		44.56		36.47		29.42		45.38
1998	27.47		34.09		39.47	a	45.48		54.38	a	59.52		69.48		66.85		62.17		45.32		36.88		25.37		47.21
1999	32.03	a	31.77		35.47		43.57		48.84		56.03		62.60		66.13		55.32		44.69		38.33		31.47		45.52
2000	27.00		31.62		37.90		47.38		50.82	a	58.72		63.26		63.42	a	55.03		44.98		30.30		24.87		44.61
2001	28.42		30.36		38.29		43.87		53.13	a	55.90		64.48		66.06		59.27		43.77	a	36.18		29.30	a	45.75
2002	29.94		31.45		34.34		44.57	a	50.03		60.47	a	66.15		63.50		56.15		44.76		36.27		31.40		45.75
2003	31.29		33.02		38.24		43.93		51.44		61.12		67.29		66.34		58.98		49.48	a	30.53		27.47		46.59
2004	26.90		32.86		40.89		47.86	a	53.16		62.02		67.24		67.26		55.17		47.40		35.63		31.92		47.36
2005	27.56		33.23		41.40		46.33		55.11		57.07		65.68	a	65.92		55.15		47.40		32.58		25.10		46.05
2006	32.37		29.54		36.10	a	44.05	a	52.92		59.80		67.92		64.82		58.47		46.87		31.75		25.78	a	45.87
2007	23.78	a	32.23		39.23		43.86	a	53.11		58.45		68.31		63.58	a	56.97		43.66		34.90		26.08	a	45.35
2008	21.97		33.59		36.13	a	40.31	a	53.85		56.67	c	64.70	a	63.29		56.15		45.08	a	36.45	a	22.10	e	44.19
2009	26.62	b	32.16		33.38	a	43.93	a	51.72	a	61.90		69.32		67.35		58.60	d	42.48	a	35.42		22.44	f	47.54	a
2010	31.45		35.20		39.79		44.52		49.23		56.83	a	66.98	b	63.90	b	57.21	a	47.74		32.15		28.61		46.13
2011	28.76		30.06	a	36.73		40.63		48.95		56.47		62.39		66.35		58.98		44.55		31.20		27.06		44.34
2012	25.43	i	32.11	b	35.13		44.43		51.10		54.67	i	68.07	a	67.57	d	59.73	b	46.32	a	35.70	b	29.79		46.99	b
2013	23.77	a	35.28	a	38.83	b	44.58		53.55	a	59.34	a	69.67	a	67.09	b	60.32		45.81		35.29	b	25.92	a	46.62
2014	30.52		25.93		36.50		44.17	a	54.05		60.39	b	70.31		69.21	c	58.95		50.42	a	34.54	c	28.86	c	46.99
2015	29.60		37.48		43.25	a	44.13		56.42	a	67.90	d	70.07	a	68.31	b	55.30	b	50.70	a	35.02	b	26.22	d	48.70
2016	28.22	a	34.98		39.40	a	51.62		55.35	a	60.68		65.40		66.97	b	56.92		45.37		41.25	b	21.52		47.31
2017	18.37		26.57		35.92		43.02	a	53.52		60.25		69.81		69.82	a	59.60		43.63		35.31	a	26.52	c	45.19
2018	31.40		31.17	a	36.55		44.26	a	59.68		58.84	a	68.07	b	66.92		56.67	a	45.88	a	36.87		30.32	a	47.22
2019	28.85	a	21.04		32.77		45.43	a	55.81	b	61.15		65.13		68.32		57.30	b	41.08		35.63		27.82	a	45.03
2020	29.03	b	33.84		37.23		46.25		53.58		59.52	a	65.98		67.90	a	61.07		48.00	b	34.73	d	29.65		47.23
2021	30.82		28.84		37.39		45.35		51.72	a	64.40	a	72.88	b	68.29		56.95	b	45.10	a	37.25	b	25.62	a	47.05
2022	25.19	g	31.38		40.10		39.82		48.24		58.02	a	68.48	b	71.11		60.88		52.54	c	28.98		18.33	a	47.08	a
2023	30.72	d	28.71	b	34.58		41.07	b	58.84	f	61.71	a	69.57	c	69.39	c	57.12	e	48.32	a	34.98	a	30.72	a	46.08	a
2024	23.50	a	33.19		38.76		44.33	i	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	31.82	i
Period of Record Statistics
MEAN	26.34		31.36		37.54		44.51		52.51		58.94		65.49		64.66		57.03		46.12		34.79		27.40		45.62
S.D.	5.32		3.61		2.72		2.50		2.59		2.72		2.71		2.80		2.43		2.45		3.04		3.71		1.29
SKEW	-1.30		-0.73		-0.15		-0.00		0.29		0.56		0.14		-0.13		-0.04		0.55		-0.50		-0.61		-0.51
MAX	34.56		38.04		44.24		51.62		59.68		67.90		72.88		71.11		62.20		52.54		41.25		33.17		48.70
MIN	6.47		20.94		30.00		38.15		46.82		53.93		58.58		56.56		52.12		41.08		25.02		18.33		41.76
YRS	79		84		77		78		81		80		82		82		82		82		82		74		56