SPRAY, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(358009) SPRAY
From Year=1937 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	42	78	187	297	566	801	1053	985	726	419	137	53	5347
40 S	42	120	308	605	1171	1973	3026	4011	4737	5156	5293	5347	5347
45 M	11	23	88	170	413	651	898	830	576	273	55	17	4008
45 S	11	34	123	293	706	1358	2256	3086	3663	3936	3991	4008	4008
50 M	2	4	33	81	268	502	743	675	428	148	16	4	2903
50 S	2	6	39	119	387	889	1632	2307	2736	2884	2900	2903	2903
55 M	0	0	8	29	147	355	588	520	287	63	2	0	2000
55 S	0	0	8	37	184	539	1127	1647	1934	1997	1999	2000	2000
60 M	0	0	1	7	64	219	434	368	162	17	0	0	1271
60 S	0	0	1	7	71	290	724	1092	1254	1271	1271	1271	1271

Corn Growing Degree Days
50 M	22	56	145	223	384	498	619	582	474	309	86	28	3426
50 S	22	78	224	446	830	1328	1947	2529	3003	3312	3398	3426	3426

M = Monthly Data
S - Running sum of monthly data.
Growing Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
Table updated on Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu