RIDDLE, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(357169) RIDDLE 2 NNE
From Year=1899 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	103	158	251	353	530	689	884	873	691	468	224	104	5329
40 S	103	261	512	865	1395	2084	2968	3841	4532	5000	5224	5329	5329
45 M	31	62	123	210	376	539	729	718	541	316	106	35	3785
45 S	31	93	216	426	801	1340	2069	2787	3328	3644	3751	3785	3785
50 M	6	15	42	97	228	389	574	563	391	177	34	7	2525
50 S	6	20	63	160	388	777	1351	1914	2305	2483	2517	2525	2525
55 M	1	2	9	32	111	243	419	408	247	74	7	1	1555
55 S	1	3	11	44	154	398	817	1225	1472	1547	1554	1555	1555
60 M	0	0	1	7	42	120	266	255	123	20	1	0	834
60 S	0	0	1	7	49	168	435	690	813	834	834	834	834

Corn Growing Degree Days
50 M	36	79	145	214	321	419	552	545	439	285	93	31	3160
50 S	36	114	259	473	794	1213	1765	2310	2750	3035	3129	3160	3160

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