PLAIN, WA

Average of Maximum Temperature (Degrees Fahrenheit)

(456534)

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
1937	-----	z	-----	z	-----	z	54.62	i	68.16		74.27		84.10		69.71		64.80		51.52	b	37.40		32.13		60.26	d
1938	30.74		30.79		-----	z	52.00	o	64.61		78.67		87.55		80.23		81.20		61.00		41.50		38.97		59.52	b
1939	40.10		39.11		50.65		62.57		68.85	e	70.20		83.07	a	85.06		74.53		60.26		46.47		38.61		59.96
1940	34.97		39.90		52.81		58.30		70.16		78.00		80.45		81.81		76.03		58.61		39.00		-----	z	60.91	a
1941	-----	z	46.15	b	58.45		65.30		66.55		72.97		86.87		83.52		65.93		60.19		49.30		38.94		63.11	a
1942	34.87		43.57		50.77		62.30		65.48		70.80		84.77		86.10		78.47		65.00		41.10		38.03		60.11
1943	28.27	a	44.85	b	-----	z	-----	z	-----	z	-----	z	82.74		78.94		80.50		62.16		46.53		39.48		57.93	d
1944	38.26		43.28		49.32		60.50		70.90		75.87		85.16		81.87		79.67		69.71		44.50		33.84		61.07
1945	39.83	a	45.00		49.10		57.97		72.71		77.18	b	85.48		85.32		73.67		69.16		43.77		34.56	d	61.15
1946	42.77		47.39		52.42		62.40		71.94		70.90		80.58		83.35		71.70		57.48		43.83		40.25	g	62.25	a
1947	-----	z	45.18		56.45		64.07		75.00	h	-----	z	-----	z	78.74		75.47		55.70	a	46.27		36.79	b	57.33	d
1948	35.77	e	36.96	a	44.54	g	54.03		61.84		79.07		79.23		76.77		73.37		59.61		44.33		29.23		57.29	a
1949	25.58		33.08	c	45.90		60.43		71.13		70.10		78.81		79.32		74.93		58.19		50.23		35.84		56.96
1950	18.97		35.21		42.29		53.40		64.93	c	74.03		83.42		87.19		79.47		55.26		38.71	p	35.94		57.28	a
1951	33.16		39.00		42.39		-----	z	-----	z	75.70		84.42		79.32		75.57		52.87		-----	z	-----	z	60.30	d
1952	27.77	a	39.21		46.94		61.23		69.21	b	70.30		82.68		81.23		78.30		70.03		40.97		33.52		58.45
1953	39.81		45.38	o	48.20	f	55.93		65.06		67.13		80.74	d	79.03		73.90		62.77		44.37		40.71		60.95	b
1954	30.10		38.04		44.13		52.57		66.73	a	67.43		78.37	d	75.00		70.13		56.65		47.97		34.23		55.11
1955	35.10		40.00		40.48		49.43		60.10	a	72.83		77.19		81.16		73.38	a	54.68		33.33		28.10		53.82
1956	31.42		32.86		43.87	a	62.27		73.64	c	68.40		85.94		82.13		73.17		54.87		38.57		35.94		56.92
1957	23.74		38.64		45.44	f	60.65	m	70.90		73.30		76.59	d	74.94		77.67		55.03		48.07	b	39.30	h	59.88	c
1958	36.45		43.32		47.74		56.30		76.48		78.90		88.10		-----	z	-----	z	-----	z	43.10	a	37.35		56.42	c
1959	33.58		38.96		47.39		58.23		63.26		70.10		83.35		76.81		66.30		59.58		44.10		37.90	a	56.63
1960	33.06		41.85	b	49.73	i	-----	z	61.93	c	74.80		87.97		-----	z	73.33		66.06		43.17	a	32.96	d	57.24	c
1961	35.39	c	43.28	c	47.89	c	57.95	k	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	42.19	i
1962	35.68	c	41.44	c	47.52	f	61.32	b	60.60	a	77.06	l	80.36	c	-----	z	77.69	a	-----	z	44.18	b	38.56	d	54.98	d
1963	34.03	b	50.52	e	50.57	a	53.76	i	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	44.39	l	34.35	k	45.04	i
1964	36.23		45.71	a	47.28	f	55.57	b	65.75	c	72.38	d	84.67	g	76.57	a	71.10	i	61.93	d	40.79	b	31.52	f	56.87	d
1965	35.35		43.88	b	51.23	a	61.71	b	65.07	d	75.75	b	84.97	b	80.46	e	72.81	d	63.41	b	46.97	a	34.47	p	61.97	a
1966	34.37	l	43.36	c	50.00	c	61.80		71.60	a	72.21	a	79.28	f	83.82	c	80.14	b	59.97	a	46.79	a	37.50	c	60.72	b
1967	38.93	c	47.12	b	48.33	a	54.67		67.90	a	78.93	a	84.07	c	91.71	c	83.14	h	60.61	h	-----	z	-----	z	63.96	d
1968	-----	z	-----	z	-----	z	-----	z	68.10		73.57		85.32		75.52		73.00		54.29		42.17		29.48		62.68	d
1969	21.74		37.08	o	49.35		55.20		72.45		79.10	a	80.55		78.87		70.80		57.68		45.17		32.61		58.50	a
1970	31.94		42.96		48.35		52.37		67.87		78.67		82.32		82.84		67.83		57.65		40.77		32.53	n	59.42	a
1971	35.94		41.64		42.48		54.37		69.06		69.30		83.68		86.81		67.90		57.06		42.97		32.84		57.00
1972	31.13		37.24		47.35		51.67		69.63	a	73.47		80.16		83.67	a	68.03		62.77		42.60		30.32		56.50
1973	32.90		42.14		52.35		61.70		68.58		72.13		85.13		80.65		73.43		57.29		37.27		36.42		58.33
1974	31.55		43.71		46.90		56.27		62.16		77.33		79.97		83.87		79.20		65.10		42.57		36.61		58.77
1975	33.29		37.75		44.90		54.27		66.00		71.47		84.55		75.61		78.20		54.71		40.53		37.39		56.56
1976	37.94		40.21		46.52		55.90		68.23		71.13		79.52		76.94		76.60		61.90		46.80		37.77		58.29
1977	32.29		44.46		48.48		64.83		63.35		78.27		79.16		86.06		69.50		61.32		39.83		34.03		58.47
1978	36.71		43.04		53.16		58.13		66.35		80.40		84.37	a	80.20	a	68.03		65.52		41.20		34.90		59.33
1979	27.77		39.43		53.26		60.93		70.13		77.53		85.42		83.65		78.20		65.97		40.60		39.03	a	60.16
1980	30.61		40.14		48.94		64.17		68.58		71.30		82.58		77.94		73.10		64.55		42.40		36.42		58.39
1981	39.58		41.25		55.90		58.50		66.26		67.93		80.68		88.29		74.97		59.84		45.27		35.19		59.47
1982	34.68		38.36		48.55		55.37		67.45		78.43		80.58		80.71		72.50		57.45		38.43		33.35		57.16
1983	38.81		41.50		51.68		60.20		72.07	a	71.97		76.00		82.13		69.13		59.94		41.77		26.61		57.65
1984	38.81		43.10		52.77		54.73		61.26		71.30		82.58		82.06		68.90		54.55		39.27		30.55		56.66
1985	29.84		39.54		49.52		58.73		70.00		75.20		89.61		80.77		67.27		54.26		32.63		27.03		56.20
1986	37.29		40.96		54.42		56.63		67.68		78.72	a	74.81		85.97		65.37		64.26		41.40		32.03		58.30
1987	31.58		42.25		48.87		63.03		69.13		79.63		78.31	b	81.84		79.80		66.68		46.07		31.52		59.89
1988	32.60	a	44.90		49.63	a	60.07		65.29		70.83		79.58		81.23		73.13		65.84		40.03		33.16		58.02
1989	38.50	a	34.61		44.65		62.33		64.64	c	75.43		79.06		77.58		76.43		59.23		45.27		36.00		57.81
1990	36.52		39.21		51.58		62.23		63.10		71.00		83.67	a	80.81		79.50		53.16		44.83		27.19		57.73
1991	34.19		45.64		47.23		56.93		62.68		68.90	a	81.06		81.39		78.37		59.87		39.40		36.77		57.70
1992	34.94		40.93		58.61		59.57	b	72.68		80.00		79.13		82.29		69.23		60.81		41.03		30.42		59.14
1993	27.68		37.00		46.19		54.57		72.42		69.83		71.58		78.35		76.97		64.45		41.10		31.84		56.00
1994	42.06		34.96		53.39		60.63		68.70	a	71.83		84.42		80.06		78.27		57.84		37.27		31.29		58.39
1995	32.26		42.29		47.55		57.20		70.16		72.70		79.65		73.71		76.07		53.90		42.33		32.40	a	56.68
1996	31.39		35.48		47.55		56.27		59.42		71.80		83.65		80.87		69.20		54.84		38.07		27.55		54.67
1997	34.58		40.89		44.93	a	53.43		67.81		70.13		78.52		82.55		71.93		55.03		44.10		35.10		56.58
1998	31.68		40.11		49.55		59.23		66.27	a	73.43		85.06		83.90		80.60		58.45		42.53		30.52		58.44
1999	37.83	a	38.07		45.03		58.40		62.29		68.40		78.90		81.39		73.63		57.45		43.67		35.48		56.71
2000	32.87		39.17		47.71		62.23		63.50	a	72.47		79.52		79.13	a	69.80		56.97		37.47		29.65		55.87
2001	32.94		39.57		49.45		56.50		69.60	a	69.00		79.81		82.06		75.43		54.58		42.90		32.94		57.06
2002	35.58		40.32		42.65		56.83		62.87		75.47		81.77		80.35		73.03		60.29		44.70		34.48		57.36
2003	35.65		44.04		48.00		56.27		65.16		76.77		84.61		83.32		75.70		61.57	a	38.60		32.94		58.55
2004	31.74		41.03		51.65		65.17		66.00		78.57		83.52		82.52		68.73		59.81		43.83		37.35		59.16
2005	31.58		46.18		53.74		59.27		68.87		71.20		81.77	a	83.77		70.63		58.10		37.77		31.10		57.83
2006	36.94		39.04		46.26		57.17	a	67.55		74.27		84.26		82.39		75.63		60.13		36.87		31.13	a	57.64
2007	30.10	a	39.04		48.71		56.03	a	68.74		72.13		84.23		80.07	a	72.77		54.35		41.53		31.94		56.64
2008	30.61		42.34		45.90		52.76	a	68.00		70.89	c	80.57	a	78.42		74.23		56.77	a	42.48	a	28.67	d	55.97
2009	33.53	a	39.07		42.13	a	58.03	a	66.87	a	75.33		85.65		82.87		75.15	d	51.97	a	41.20		28.92	f	59.26	a
2010	35.23		42.64		50.68		55.27		61.06		69.00		82.90	b	79.07	b	68.69	a	59.06		38.70		32.39		56.22
2011	35.48		39.37	a	45.03		50.83		60.35		69.73		76.74		82.42		77.67		55.45		39.47		36.61		55.76
2012	33.00	i	41.44	b	44.19		56.77		64.32		65.90	i	83.27	a	84.67	d	78.86	b	58.50	a	41.29	b	35.00		58.83	b
2013	31.40	a	44.63	a	50.07	b	55.60		67.50	a	72.34	a	85.77	a	82.41	b	73.70		59.10		43.75	b	35.07	a	58.44
2014	37.00		32.21		46.52		56.21	a	68.23		73.29	b	86.13		84.25	c	75.10		61.07	a	43.26	c	35.25	c	58.21
2015	36.19		46.86		56.30	a	57.40		70.20	a	83.81	d	85.43	a	84.31	b	70.64	b	64.17	a	43.11	b	32.07	d	60.87
2016	33.87	a	44.45		49.80	a	66.17		68.70	a	74.83		79.13		84.07	b	72.43		54.35		48.68	b	29.52		58.83
2017	26.35		36.79		44.32		53.62	a	68.13		72.97		85.68		88.23	a	75.73		57.03		41.38	a	32.21	c	56.87
2018	36.23		40.44	a	46.97		54.69	a	72.84		72.90	a	85.17	b	83.13		71.97	a	60.40	a	46.37		36.07	a	58.93
2019	35.17	a	29.89		45.81		57.34	a	69.31	b	74.23		79.00		83.35		70.00	b	53.39		47.23		32.23	a	56.41
2020	35.41	b	44.17		48.90		59.00		66.35		70.97	a	80.81		84.40	a	76.83		60.59	b	42.15	d	36.58		58.85
2021	36.81		35.75		49.52		60.67		66.20	a	80.24	a	88.31	b	83.29		72.14	b	57.27	a	45.21	b	31.60	a	58.92
2022	32.33	g	42.18		51.00		49.87		58.16		69.59	a	85.31	b	88.16		77.97		69.57	c	36.57		25.97	a	59.49	a
2023	38.00	d	37.92	b	44.42		52.36	b	74.36	f	76.17	a	86.18	c	84.96	c	71.32	e	60.10	a	43.48	a	34.50	a	57.22	a
2024	28.47	a	40.72		50.61		57.62	i	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	39.93	i
Period of Record Statistics
MEAN	33.77		40.72		48.71		57.90		67.08		73.67		82.34		81.59		73.80		59.39		42.37		33.77		57.79
S.D.	4.30		3.87		3.81		3.84		3.70		3.69		3.39		3.61		4.07		4.35		3.46		3.43		1.55
SKEW	-0.79		-0.41		0.34		0.06		-0.19		0.42		-0.40		-0.29		-0.20		0.52		-0.23		-0.25		0.02
MAX	42.77		50.52		58.61		66.17		76.48		83.81		89.61		91.71		81.20		70.03		50.23		40.71		61.15
MIN	18.97		29.89		40.48		49.43		58.16		67.13		71.58		69.71		64.80		51.52		32.63		25.97		53.82
YRS	81		84		78		78		81		81		82		82		82		82		82		76		59