PROSSER, WA

Average of Minimum Temperature (Degrees Fahrenheit)

(456768)

File last updated on April 19, 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
1925	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	55.58		-----	z	-----	z	-----	z	-----	z	-----	z	55.58	k
1926	-----	z	31.65	h	33.85	e	38.45	a	43.20	a	52.15	d	54.52	d	51.77		42.00	d	39.04	c	31.86	a	21.79	b	40.86	b
1927	21.65	h	30.46		31.10	a	33.50		39.16		49.13		50.29		53.16		45.72	e	38.15	e	33.76	i	17.67	g	41.19	c
1928	-----	z	-----	z	-----	z	33.23	d	43.04	f	47.21	f	-----	z	-----	z	43.44	n	41.04	c	31.22	g	25.04	d	33.10	i
1929	15.11	c	12.57		31.04	c	34.79	a	40.83	a	47.59	c	51.31	e	52.33	d	44.79	f	38.93	b	21.32	e	27.12	e	33.90	a
1930	4.39		32.04	e	33.69	b	36.78	c	40.86	c	46.48	g	51.07	d	53.36	f	47.70	c	34.60	a	29.62	i	26.93	d	34.23	c
1931	29.29		27.89		33.03		37.86	a	46.32		50.63		54.52		52.29		48.00	a	38.87		28.43		19.71		38.90
1932	21.47	a	25.55		35.13		39.23		43.00		48.77		52.26		51.90		44.77		41.43	a	34.53		21.03		38.26
1933	25.35		20.18		32.03		36.10		40.90		48.97		52.94		53.52		44.70		41.90		33.90		34.23	a	38.73
1934	31.39		30.57		35.58		43.93		46.03		49.73		52.58		53.77		45.40		43.74		37.23		30.26		41.69
1935	27.32		28.96		29.48		34.17		40.90		48.87		53.13		49.84		48.00		36.68		27.00		27.48		37.65
1936	29.90		14.18	a	30.74		40.17		46.81		52.43		52.45		51.16		44.26	c	38.00		22.45	a	27.39	c	37.50
1937	5.08	e	21.35	b	33.93	d	36.63		41.23		51.73		55.16		49.74		46.90		41.20	a	35.64	b	29.68		37.36
1938	28.06		27.82		31.67	a	37.69	a	40.65		50.30		55.50	a	48.26		50.50		39.90		25.17		25.42		38.41
1939	28.26		24.89	a	34.03		37.20		44.52		47.50		53.80	a	53.55		47.23		38.23		27.67		31.00		38.99
1940	23.84		30.57	a	35.32		38.50		43.58		48.63		54.10		51.68		50.00		42.17	a	26.67		25.74		39.23
1941	26.52		27.61		33.13		38.47		43.35		48.83		56.52		55.16		45.13		39.35		32.90	a	28.35		39.61
1942	18.32		27.21		28.37	a	37.20		43.81		46.70		54.03		54.48		46.27		38.10	a	30.63		27.23		37.70
1943	15.50	a	28.82		28.87		39.59	a	39.84		46.03		51.87		49.45		45.76	a	39.61		33.17	a	25.77		37.02
1944	21.40	a	27.25	a	28.19		36.63		42.45		48.83		52.97		50.81		47.40		40.74		31.67		26.06		37.87
1945	30.13		30.54		32.03	a	33.57	b	44.55		45.97		52.26		52.26		44.18	b	38.82	c	30.22	c	25.30	d	38.32
1946	25.62	e	27.56	c	32.00	d	36.54	b	44.79	b	49.07		52.97		53.03		45.07		34.64	c	26.86	a	28.17	a	38.03
1947	17.78	d	27.28	c	33.52		38.46	b	47.39		49.43		52.61		49.29		48.60		43.42		32.27		28.55	b	39.05
1948	23.54	c	24.00	d	28.43	a	34.43		44.84		53.57		50.03		51.90		45.40		35.94		30.33		20.94		36.95
1949	6.48		24.36		31.97		35.33		45.32		46.47		49.50	a	50.71		48.93		33.84		36.17		27.84		36.41
1950	6.74		22.89		31.71		34.72	a	39.58		51.73		52.24	f	52.48		46.23		41.06		34.30		33.03		35.86	a
1951	26.29		27.39		27.58		35.24	e	43.74		50.23		52.77		50.90		47.57		39.42		30.14	a	21.74		37.75
1952	19.77		29.41		31.00		36.73		44.32		49.97		53.10		51.84		47.40		41.00		25.10		29.65	h	39.06	a
1953	36.03		30.68		32.06		36.37		40.52		45.60		50.71		53.26	h	46.77		40.58		34.47		29.23	a	38.46	a
1954	21.35		31.14		27.20	a	35.77		43.73	i	46.77		50.39		50.06		46.27		36.71		37.37		25.23	a	37.11	a
1955	25.55		25.64		26.52		33.53		41.06		49.40		50.73	e	49.35		46.80		39.19		25.37		23.26		36.37
1956	25.16		17.14		32.52		37.90		48.42		47.27		54.77		52.16		46.63		39.81		30.43		27.58		38.32
1957	10.16		27.52	c	33.26		38.13		49.06		50.77		50.16		49.58		49.03		39.87		29.93		30.58		38.17
1958	30.19		36.07	a	31.06		37.30		49.16		54.37		57.23		54.00		46.73		37.61		31.93		29.71		41.28
1959	25.42		28.21		30.74		37.40		41.23		49.57		52.94		49.13		47.27		38.71		26.03		25.84		37.71
1960	14.94		27.55		30.48		37.97		42.35		48.40		53.97		50.10		46.13		39.84		31.60		23.65		37.25
1961	28.87		35.11		34.77		37.73		44.16		52.27		55.16		56.61		43.80		36.71		25.17		26.90		39.77
1962	23.48		29.14		29.61		39.83		42.97		47.86	b	52.26		52.74		48.17		40.87		35.63		32.00		39.55
1963	19.58		30.75		33.23		38.57		44.16		50.57		52.16		53.68		52.00		42.10		34.31	a	27.17	a	39.86
1964	-----	z	26.83		30.39		35.70		41.74		50.47		54.52		51.26		45.67		38.26		32.40		22.71		39.08	a
1965	27.13	a	31.75		29.26		39.13		42.42		50.17		55.19		56.03		45.37		42.26		37.03		27.00		40.23
1966	29.16		29.39		32.87		38.37		44.74		49.07		53.19		54.74		50.70		39.84		35.13		32.10		40.78
1967	32.68		31.79		32.39		34.41	c	43.87		53.13		54.70	a	55.97		50.93		40.81		31.73		25.90		40.69
1968	27.00		31.93		36.13		36.20		43.74		49.03		55.00		52.61		46.90		35.10		32.30		20.84		38.90
1969	13.35		22.93		32.52		37.63		46.84		54.37		50.23		48.06		47.10		33.71		29.90		27.32		37.00
1970	22.16		30.71		32.29		34.87		41.77		51.37		52.48		49.03		42.27		35.10		29.80		23.68		37.13
1971	27.68		27.75		28.71		35.10		43.94		45.83		51.94		52.68		39.77		33.74		30.13		24.45	b	36.81
1972	22.23		27.00		33.71		34.17		46.81		51.27		54.65		54.03		42.53		35.90		31.83		18.48		37.72
1973	21.65		29.18		32.06		36.47		43.87		49.47		53.26		50.10		46.53		37.55		31.83		30.31	b	38.52
1974	20.03		29.46		32.52		38.03		41.16		50.33		52.23		50.97		45.00		34.68		32.33		27.65		37.87
1975	23.84		24.18		28.97		32.60		41.26		47.80		56.90		49.19		43.33		37.65		28.50		26.87		36.76
1976	26.19		25.83		28.55		36.73		43.03		46.33		52.10		52.39		47.80		35.23	a	28.90		21.52		37.05
1977	18.52		28.57		32.16		40.24	a	41.84		52.60		51.77		57.65		45.50		35.97		28.60		27.94		38.45
1978	26.13		31.30	a	35.42		39.00		41.93	a	51.00		54.65		53.23		46.70		35.13		25.30		20.81		38.38
1979	8.23		27.82		33.06		37.73		44.97		49.13		53.43	a	53.26		47.53		41.06		27.53		28.65		37.70
1980	14.90	a	27.07	a	31.26		40.13		44.84		47.93		51.84		48.65		47.33		36.23		32.97		30.00		37.76
1981	30.87		29.18		34.23		36.73		43.26		47.80		50.94		53.87		45.27		35.61		30.27		24.23		38.52
1982	19.79	b	27.07	a	30.93	a	33.63		43.26		52.17		52.35		52.81		46.47		36.69	b	27.57		25.61		37.36
1983	30.23	a	32.11		37.30	a	36.37		43.61		46.93		52.03		55.00		43.30		36.48	b	35.93	a	18.75	c	39.00
1984	25.83	a	31.21		36.57	a	-----	z	41.93	a	49.80		52.32		52.35		45.03		34.77		32.67		21.13	a	38.51	a
1985	23.70	a	22.32		30.70	a	39.31	a	46.42		50.83		57.81		52.26		45.28	a	37.30	a	19.34	a	18.61		36.99
1986	27.82	c	31.58	b	38.03	a	36.37		-----	z	-----	z	-----	z	56.61		47.37		40.35		33.57		26.23		37.55	c
1987	26.03	a	-----	z	35.77		41.93		47.26		51.50		54.29		53.13		47.67		38.39		32.83		25.68		41.32	a
1988	25.10		29.66		33.13		41.30		44.13		51.17		54.45		51.74		45.60		43.87		36.00		26.87		40.25
1989	29.30	a	19.00		34.29		-----	z	45.19		52.97		52.26		54.39		-----	z	39.71		35.83		27.93	a	39.09	b
1990	33.00		28.14		33.10		41.70		44.03		51.80		58.10		56.84		51.10		-----	z	34.93		18.80	a	41.05	a
1991	21.42		30.65	b	33.39	c	38.57		44.71		49.00		55.16		56.81		48.20		37.94		35.00	a	30.57	a	40.12
1992	-----	z	-----	z	-----	z	41.43		46.16		54.47		55.58		53.68		45.67		41.42		33.63		23.57	a	43.96	c
1993	17.52		24.79		-----	z	38.73		49.58		49.50		50.42		51.87		45.20		39.42		22.93		30.33	a	38.21	a
1994	31.32		27.82		34.10		-----	z	47.61		49.00		55.00		52.65		-----	z	-----	z	-----	z	-----	z	42.50	e
1995	-----	z	-----	z	-----	z	-----	z	46.81		-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	46.81	k
1996	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	41.20		34.20	a	26.62	a	21.00	b	30.76	h
1997	22.74		29.07	a	34.84		37.66	a	49.65		52.70		58.40	a	59.90	b	50.79	a	38.80	a	32.54	b	25.31	b	41.03
1998	25.20	a	31.07		-----	z	38.14	a	46.87	a	54.31	a	62.68		56.87		-----	z	35.10		32.71	b	24.59	d	40.75	b
1999	30.97	b	29.70	a	33.20	a	36.83	a	42.30	a	52.76	a	56.13		57.62	b	46.30	c	36.59	b	34.07	a	30.77	e	40.60
2000	24.83	a	28.03		33.23	a	39.27		45.29		52.55	a	56.48		53.52		45.90	a	36.10		22.59	a	24.12	f	39.80	a
2001	24.53	a	22.85	a	30.97		35.29	b	45.24	b	48.27		55.77		56.13	a	46.14	b	35.57	c	30.29	b	23.53	a	37.88
2002	26.12	e	22.73	b	26.68	c	40.03		47.35		56.37		61.87		58.17	b	50.41	a	38.19		31.93		32.23	a	41.01
2003	33.84		31.44	a	39.57	a	41.73		47.13		57.27		62.03	a	59.48		52.83		46.06		28.00	a	29.40	a	44.07
2004	25.28	b	30.21		39.10		41.80		49.39		56.10		62.61		62.65		51.79	a	43.74		31.66	a	29.61		43.66
2005	26.61		27.32		38.20	a	41.80		52.42		52.72	a	61.20	a	59.81		50.40		43.87		32.60		22.00		42.41
2006	33.42		28.37	a	34.74		41.20		47.94		56.17		63.35		58.10		51.13		41.23		34.97	a	24.48		42.92
2007	23.61		31.93	a	38.10	a	39.55	a	47.16		53.66	a	63.97	a	57.00		50.76	a	40.97		30.86	a	25.58	e	41.93
2008	22.39	c	32.28		33.53	a	35.97		50.62	b	51.90		60.58		-----	z	50.17	a	39.54	e	35.70		-----	z	41.27	b
2009	-----	z	-----	z	-----	z	-----	z	45.60	a	55.57	b	-----	z	58.11	c	49.97	a	38.64	c	31.77		18.27	a	42.56	e
2010	-----	z	32.92	c	33.60	a	40.87		-----	z	49.71	b	58.63	a	53.48	b	45.71	b	42.63	a	28.86	a	29.19	e	41.56	b
2011	27.40	a	24.23	f	27.72	m	31.64	e	43.87	a	47.93		49.64	f	58.45	b	53.00	a	42.57	c	27.36	b	23.08	f	41.53	d
2012	25.06	n	-----	z	34.25	g	-----	z	-----	z	-----	z	59.57	c	56.30	a	50.62	a	40.26		35.24	a	28.06		45.01	f
2013	23.61		26.81	b	33.97		-----	z	48.21	b	55.43		61.45		58.97		55.30		39.07	c	29.13		18.63	a	40.96	a
2014	27.87	a	26.64		34.90		41.57		47.94		-----	z	-----	z	-----	z	52.87		47.00		29.20		29.68		37.52	c
2015	29.16		33.57		38.39		40.03		52.00		62.67		63.90		60.17	a	48.76	a	46.19		29.45	a	29.52		44.48
2016	28.10		32.89	a	37.13		45.43	b	50.73	a	55.93		59.84		58.70	a	49.43	b	44.16		37.97		19.57	c	43.32
2017	16.16		24.41	a	36.84		38.90		47.65		54.14	a	61.26		60.45		52.27		39.06		32.73		25.16		40.75
2018	32.00		28.19	a	32.67	a	39.82	b	52.63	d	53.90	a	60.24	b	58.42		47.52	a	40.00	a	30.60		30.29		42.19
2019	28.68		17.32		25.10	a	42.63	c	49.47	a	54.10	a	58.87	a	60.07	a	51.87		35.52		27.90		26.34	b	39.82
2020	30.77		29.17		33.39		39.70		48.35		54.31	a	59.19		58.84		52.18	b	41.47	a	32.17	a	28.14	b	42.31
2021	30.67	a	26.59	a	33.44	f	40.31	q	48.62	o	64.21	p	63.25	g	60.06		50.69	a	42.30	a	35.40		27.32	c	39.00	e
2022	22.62	e	24.62	d	35.25	k	35.53		43.62	b	53.55	a	62.58		62.42		52.57		45.90	a	26.17		17.16		40.61	a
2023	26.47	a	26.79		30.20	a	38.24	a	51.37	a	55.78	c	55.96	g	57.63	d	51.04	b	38.85	k	24.36	p	21.78	m	42.19	d
2024	20.15	e	36.00	y	32.44	v	42.00	s	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	20.15	k
Period of Record Statistics
MEAN	23.98		27.67		32.66		37.77		44.95		50.89		55.03		54.04		47.52		39.11		30.90		25.97		39.18
S.D.	6.66		4.19		2.97		2.66		3.14		3.10		3.76		3.53		2.96		3.08		3.90		3.88		2.03
SKEW	-1.05		-1.20		-0.01		0.19		0.44		0.72		0.83		0.44		0.15		0.30		-0.57		-0.36		0.84
MAX	36.03		36.07		39.57		45.43		52.63		62.67		63.97		62.65		55.30		47.00		37.97		34.23		44.48
MIN	4.39		12.57		25.10		31.64		39.16		45.60		49.50		48.06		39.77		33.71		19.34		17.16		36.37
YRS	89		89		87		89		91		90		89		91		92		94		92		90		66