PLAIN, WA

Average of Minimum Temperature (Degrees Fahrenheit)

(456534)

File last updated on April 18, 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	32.10	i	35.26		42.17		49.23		43.42		40.87		35.26		30.30		23.19		37.46	d
1938	20.74		20.25		-----	z	32.33	o	35.97		44.53		48.61		42.39		39.53		32.57	a	24.27		21.84		33.07	b
1939	24.35		17.21		25.48		31.50		36.81	d	41.77		46.55		44.10		37.93		34.26		30.10		25.77		32.99
1940	19.94		22.59		27.94		32.47		38.29		42.70		49.16		44.61		42.30		38.23		22.47		-----	z	34.61	a
1941	-----	z	24.44	c	27.13		32.07		37.48		43.63		50.97		47.57	a	38.83		33.52		28.07		21.42		35.01	a
1942	15.77		20.48	a	24.87		31.93		36.52		42.20		49.06		47.42		38.47		29.77		25.27		19.71		31.79
1943	5.03		22.48	a	-----	z	-----	z	-----	z	-----	z	46.00		44.23		36.67		30.71		28.40		18.68		29.02	d
1944	13.87		17.39	a	24.16		29.67		33.97		43.87		46.65		41.87		39.33		33.13	a	28.10		13.17	a	30.43
1945	22.55		24.50		25.16		27.37		35.03		41.27		44.77		42.61		34.93		31.87	a	23.60		19.86	j	32.15	a
1946	14.71		17.81	a	25.35		29.37		35.90		39.00		44.87		43.77		37.77		28.23		20.07		20.91	i	30.62	a
1947	-----	z	16.18		25.32		30.33		37.71	g	-----	z	-----	z	43.13		38.14	a	35.90		28.33		24.39		30.22	d
1948	14.83	a	16.72		22.71	g	29.03		37.77		45.20		42.81		46.39		35.50		28.42		25.83		11.81		30.39	a
1949	-4.23		11.79	d	25.77		28.27		37.26		39.33		45.06		43.10		36.13		29.00		32.10		19.68		28.61
1950	-6.03		16.71		25.90		28.73		33.61		41.33		47.19		42.90		34.77		30.00		27.36	p	26.87		29.27	a
1951	15.93	a	16.68		19.26		-----	z	-----	z	40.90		44.19		45.55		35.77		32.61		-----	z	-----	z	31.36	d
1952	8.87		17.76		24.19		29.23		35.50	c	41.03		45.74		46.81		39.63		32.55		24.00		22.48		30.65
1953	27.23		25.69	o	26.03	a	30.63		35.03		40.73		45.21	c	46.70	a	38.60		33.03		28.73		25.32		34.30	a
1954	13.29		24.36		20.53	a	28.76	a	35.81		41.83		44.56	d	44.52		40.77		30.71		32.60		20.94		31.56
1955	19.77		17.68		19.52		26.87		33.53	a	44.00		47.42		44.87		39.24	a	33.17	a	18.63		11.52	b	29.68
1956	15.53	a	9.26	b	19.44	m	32.12	d	42.67	d	42.03		48.74		48.42		39.83		33.48		24.37		23.45		32.72	a
1957	1.97		17.32		24.84	f	32.18	m	43.52		44.55	a	46.53	a	44.10		40.40		32.71		25.96	b	25.83	h	33.01	c
1958	23.45		29.82		25.23	a	31.17		40.48		49.00		51.58		-----	z	-----	z	-----	z	22.43		24.90		33.12	c
1959	19.71		21.86		27.55		31.97	a	35.90		44.43		46.58		46.19		42.68	b	33.03		21.72	a	24.83	h	33.78	a
1960	19.45	k	25.00	e	27.32	l	-----	z	42.07	c	-----	z	48.32		-----	z	34.43		29.29		24.76	a	16.48	d	31.48	e
1961	18.38	b	26.36	c	27.07	c	31.79	k	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	23.94	i
1962	11.18	c	21.16	c	22.29	g	29.93	b	36.53	a	42.44	l	43.50	c	-----	z	38.00	a	-----	z	29.14	b	24.70	d	29.27	d
1963	12.14	c	25.57	e	26.90	a	31.00	j	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	30.39	l	22.55	k	21.54	i
1964	22.31	b	20.14	a	25.84	f	29.14	b	35.10	b	42.73	d	46.67	g	44.47	a	36.95	h	29.96	d	27.64	b	15.32	f	31.44	d
1965	21.16		24.69	b	20.87	a	31.69	a	35.00	d	41.68	b	46.93	a	48.19	e	36.96	c	35.31	b	33.36	b	24.20	p	34.17	a
1966	19.11	l	25.28	c	24.54	c	30.73		37.67	a	42.55	a	46.56	f	46.71	c	44.25	b	32.81		30.59	a	27.32	c	34.24	b
1967	27.46	c	27.92	b	28.20	a	29.00	a	37.45		45.83	a	47.71	c	48.14	c	42.19	i	38.04	h	-----	z	-----	z	36.47	d
1968	-----	z	-----	z	-----	z	-----	z	35.58		42.50		48.00		46.94		41.87		31.35		28.23		16.77		36.41	d
1969	8.74		16.23	o	23.10		31.00		38.29		48.40		45.65		45.03		43.10		31.90		28.70		24.94		33.53	a
1970	18.52		25.81	a	25.26		29.93		36.16		46.70		49.77		45.97		37.53		29.90		25.80		18.82	n	33.76	a
1971	20.84		22.25		22.45		29.20		38.03		41.13		46.16		48.32		36.33		31.90		29.30		18.84		32.06
1972	16.55		19.55		27.03		27.83		38.48		44.60		43.87		47.42		37.13		29.06		31.70		15.94		31.60
1973	14.52		22.36		27.90		30.57		36.61		43.27		45.90		45.94		41.20		35.00		25.63		26.83	a	32.98
1974	14.97		26.00		26.10		32.23		35.26		42.62	a	45.97		45.42		38.83		30.06		31.20		26.00		32.89
1975	19.45		19.96		24.10		28.20		35.87		42.57		50.06		45.94		37.30		34.35		26.43		22.84		32.26
1976	21.26		22.76		23.84		30.73		36.35		39.20		46.61		47.35		41.73		30.81		28.30		24.87		32.82
1977	17.29		26.25		28.48		31.47		35.77		46.50		46.16		50.42		39.93		30.35		25.03		21.68		33.28
1978	23.48		25.46		26.65		31.47		36.03		43.17		47.80	a	46.63	a	42.20		30.32		22.73		13.61		32.46
1979	3.97		18.14		24.42		29.20		36.45		42.23		47.61		47.71		41.53		34.65		24.50		27.10		31.46
1980	8.58		23.66		27.35		32.67		39.45		43.17		47.26		45.10		41.03		31.35		30.33		25.48		32.95
1981	29.10		24.68		28.74		31.27		38.48		42.73		47.00		49.06		39.53		31.16		29.13		21.16		34.34
1982	19.61		20.14		25.74		27.90		35.37	a	45.37		48.39		47.06		41.76	a	34.26		23.20		19.00		32.32
1983	25.87		27.46		29.80	a	30.87		38.77		44.90		46.48		50.42		38.27		32.13		30.93		11.10		33.92
1984	21.55		27.07		29.87	a	30.93		35.20	a	43.37		47.55		48.77		38.30		31.42		27.83	a	11.81		32.80
1985	17.19		16.71		24.81		31.07	b	38.71		44.90		50.55		46.29		38.90	a	34.65		16.72	a	13.53	a	31.17
1986	23.58		21.50		29.13		31.97		37.84		46.40		46.71		50.39		41.13		31.87		29.87		23.71		34.51
1987	19.90		26.68		27.90		33.60		39.23		44.79	a	49.93	a	46.77		41.30		30.55		30.66	a	19.33	a	34.22
1988	18.66	b	22.93	a	27.66	b	32.77		37.90		44.13		47.90		46.26		40.13		37.06		30.17		22.45		34.00
1989	22.90		12.50		26.16		32.70		37.79	b	45.60		47.03		48.52		38.23		33.26		32.69	a	26.68		33.67
1990	26.39		20.75		27.26		34.70		37.81		45.13		50.71		50.97		42.00		32.19		30.67		13.81		34.36
1991	16.71		27.71		26.45		30.57		38.00		42.40		47.71		50.48		41.00		30.74		28.20		27.52		33.96
1992	26.35		29.90		29.87		34.23		39.61		48.63		50.19		48.35		40.17		33.35		27.97		17.87		35.54
1993	15.74		18.29		25.16		31.90		42.87	a	44.41	a	45.58		47.03		39.17		34.77		21.43		24.45		32.57
1994	27.06		21.96		27.06		35.87		40.23		43.20		50.58		48.26		42.73		32.39		24.77		21.39		34.62
1995	18.48		23.86		25.39		30.90		39.23		43.93		49.94		44.16		43.33		33.19		29.03	a	23.83	b	33.77
1996	18.52		16.38		27.13		32.13		35.81		42.27		47.94		46.77		40.10		32.97		27.10	a	18.10		32.10
1997	19.94		23.29		27.58		29.57		38.84		43.33		47.29		49.45		43.93		34.10		28.83		23.74		34.16
1998	23.26		28.07		29.07	a	31.73		42.16		45.60		53.90		49.81		43.73		32.19		31.23		20.23		35.92
1999	26.23	a	25.46		25.90		28.73		35.39		43.67		46.29		50.87		37.00		31.94		33.00		27.45		34.33
2000	21.13		24.07		28.10		32.53		38.45		44.97		47.00		47.81		40.27		33.00		23.13		20.10		33.38
2001	23.90		21.14		27.13		31.23		36.58		42.80		49.16		50.06		43.10		32.80	a	29.47		25.63	a	34.42
2002	24.29		22.57		26.03		32.03	a	37.19		45.55	a	50.52		46.65		39.27		29.23		27.83		28.32		34.12
2003	26.94		22.00		28.48		31.60		37.71		45.47		49.97		49.35		42.27		37.40	a	22.47		22.00		34.64
2004	22.06		24.69		30.13		30.34	a	40.32		45.47		50.97		52.00		41.60		35.00		27.43		26.48		35.54
2005	23.55		20.29		29.06		33.40		41.35		42.93		49.42		48.06		39.67		36.71		27.40		19.10		34.25
2006	27.81		20.04		26.13	a	31.33		38.29		45.33		51.58		47.26		41.30		33.61		26.63		20.06		34.12
2007	17.68		25.43		29.74		32.03		37.48		44.77		52.39		47.23		41.17		32.97		28.27		20.17	a	34.11
2008	13.32		24.83		26.27	a	27.86	a	39.71		42.90		48.74		48.16		38.07		33.84		30.43		15.63	d	32.48
2009	20.21	b	25.25		24.90		29.83	a	36.77		48.47		53.00		51.84		43.43		33.29		29.63		16.20	a	34.40
2010	27.68		27.75		28.90		33.77		37.39		44.76	a	50.94		48.58		45.63		36.42		25.60		24.84		36.02
2011	22.03		20.74	a	28.42		30.43		37.55		43.20		48.03		50.29		40.30		33.65		22.93		17.52		32.92
2012	17.86	i	22.78	b	26.06		32.10		37.87		43.43	i	52.87	a	50.48	d	40.61	b	34.13	a	30.11	b	24.58		35.16	b
2013	16.13	a	25.93	a	27.59	b	33.57		39.60	a	46.34	a	53.35		51.76	b	46.93		32.52		26.82	b	16.77	a	34.78
2014	24.03		19.64		26.48		32.14	a	39.87		47.50	b	54.48		54.18	c	42.80		39.77	a	25.81	c	22.46	c	35.76
2015	23.00		28.11		30.20	a	30.87		42.63	a	52.00	d	54.70	a	52.31	b	39.96	b	37.23	a	26.93	b	20.37	d	36.53
2016	22.57	a	25.52		29.00	a	37.07		42.00	a	46.53		51.68		49.86	b	41.40		36.39		33.82	b	13.52		35.78
2017	10.39		16.36		27.52		32.41	a	38.90		47.53		53.94		51.40	a	43.47		30.23		29.24	a	20.82	c	33.52
2018	26.58		21.89	a	26.13		33.83	a	46.52		44.79	a	50.97	b	50.71		41.38	a	31.37	a	27.37		24.57	a	35.51
2019	22.53	a	12.18		19.74		33.52	a	42.31	b	48.07		51.26		53.29		44.61	b	28.77		24.03		23.40	a	33.64
2020	22.66	b	23.52		25.55		33.50		40.81		48.07	a	51.16		51.40	a	45.30		35.41	b	27.31	d	22.71		35.62
2021	24.84		21.93		25.26		30.03		37.23	a	48.55	a	57.45	b	53.29		41.75	b	32.93	a	29.29	b	19.63	a	35.18
2022	18.04	g	20.57		29.19		29.77		38.32		46.45	a	51.66	b	54.06		43.80		35.50	c	21.40		10.70	a	34.67	a
2023	23.44	d	19.50	b	24.74		29.79	b	43.32	f	47.24	a	52.96	c	53.82	c	42.92	e	36.53	a	26.48	a	26.93	a	34.94	a
2024	18.53	a	25.66		26.90		32.53	m	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	23.70	i
Period of Record Statistics
MEAN	18.88		22.02		26.31		31.09		37.93		44.24		48.64		47.73		40.28		32.85		27.22		21.04		33.50
S.D.	6.94		4.23		2.41		1.94		2.48		2.46		2.91		2.96		2.64		2.41		3.47		4.65		1.65
SKEW	-1.35		-0.58		-0.91		0.29		0.85		0.40		0.48		0.20		-0.04		0.34		-0.53		-0.55		-0.59
MAX	29.10		29.90		30.20		37.07		46.52		52.00		57.45		54.18		46.93		39.77		33.82		28.32		36.53
MIN	-6.03		9.26		19.26		26.87		33.53		39.00		42.81		41.87		34.43		28.23		16.72		10.70		28.61
YRS	80		84		78		78		81		80		82		82		82		82		82		75		57