POTLATCH 3 NNE, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(107301) POTLATCH 3 NNE
From Year=1915 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	6	15	53	169	372	539	754	732	484	227	45	11	3408
40 S	6	22	74	243	616	1155	1909	2641	3125	3352	3397	3408	3408
45 M	1	2	14	76	230	390	599	577	338	115	11	2	2354
45 S	1	3	16	92	322	712	1311	1888	2227	2341	2352	2354	2354
50 M	0	0	2	26	117	247	444	423	206	45	1	0	1511
50 S	0	0	2	28	146	392	837	1259	1465	1510	1511	1511	1511
55 M	0	0	0	6	48	127	293	272	102	12	0	0	860
55 S	0	0	0	6	54	181	474	746	848	860	860	860	860
60 M	0	0	0	1	14	50	158	142	37	2	0	0	404
60 S	0	0	0	1	15	65	223	365	402	404	404	404	404

Corn Growing Degree Days
50 M	2	8	40	122	251	345	492	491	347	171	23	3	2294
50 S	2	9	49	171	422	767	1259	1750	2097	2268	2291	2294	2294

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