1998 Monthly Weather Summaries

Malheur Experiment Station, Ontario, OR

Note: Precipitation for May 1998 was the highest since weather records began in 1943. The historical mean precipitation for May is 1.02 inches.

Month		Air temperature		Soil temp.		Precip.	Pan evap.	Total degree days		Accumulated degree days (50-86 ^oF) from Jan 1
Month		Air temperature		(4" depth)				Total degree days
		Max.	Min.	Max.	Min.			for month
		---------- ^oF ----------				--- inches ---		50-86 ^oF	32-104 ^oF	1998	10 year avg
December 98	Sum					1.11		3.6	88.2	3042	3030
	Mean	37	22	35	34
	Max	60	44	44	44	0.27
	Min	15	-2	28	28
November 98	Sum					1.07		16.2	322.2	3038	3029
	Mean	52	36	45	44
	Max	63	42	50	48	0.17
	Min	41	24	43	42
October 98	Sum					0.04	4.52	151	599	3,022	3,020
	Mean	66	36	55	51
	Max	83	46	65	62		0.3
	Min	56	23	48	46		0.07
September 98	Sum					1.0	6.5	515	1067	2,871	2,852
	Mean	84	52	69	64		0.22
	Max	97	65	73	69	0.54	0.32
	Min	68	43	63	61		0.06
August 98	Sum						11.21	749	1348	2,356	2,411
	Mean	93	57	73	68		0.36
	Max	105	64	78	71		0.54
	Min	84	48	68	64		0.25
July 98	Sum					1.06	9.9	803	1424	1,607	1,754
	Mean	95	61	74	68		0.37
	Max	103	69	78	72	0.93	0.53
	Min	79	56	67	60		0.1
June 98	Sum					0.36	8.27	405	940	805	1,034
	Mean	78	48	65	59		0.28
	Max	91	58	73	63	0.12	0.41
	Min	66	38	60	54		0.1
May 98	Sum					4.55	5.91	234	760	400	548
	Mean	68	46	49	59		0.19
	Max	85	52	57	65	1.06	0.35
	Min	49	38	41	54		0
Apr 98	Sum					1.43	5.12	112	527	166	218
	Mean	62	38	51	46		0.18
	Max	81	47	59	53		0.27
	Min	51	31	45	42		0.07
Mar 98	Sum					0.95		52	364	54	63
	Mean	55	33	45	44
	Max	68	49	58	48
	Min	40	24	41	41
Feb 98	Sum					1.45		2	191	2	8
	Mean	48	30	42	42
	Max	58	40	44	44
	Min	41	22	41	41
Jan 98	Sum					2.26		0	135	0	0
	Mean	41	27	38	38
	Max	51	36	42	41
	Min	28	14	37	36