POTLATCH 3 NNE, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(107301) POTLATCH 3 NNE
From Year=1915 To Year=2006
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	16	54	170	374	540	749	729	481	229	44	11	3403
40 S	6	22	76	246	620	1160	1909	2638	3119	3347	3392	3403	3403
45 M	1	2	14	76	231	391	594	574	335	116	11	2	2346
45 S	1	3	17	93	324	715	1309	1883	2218	2334	2345	2346	2346
50 M	0	0	2	26	117	247	439	419	203	45	1	0	1501
50 S	0	0	2	28	146	393	832	1251	1455	1500	1501	1501	1501
55 M	0	0	0	6	48	127	288	269	100	12	0	0	849
55 S	0	0	0	6	54	181	468	737	837	849	849	849	849
60 M	0	0	0	1	14	50	154	139	36	2	0	0	395
60 S	0	0	0	1	15	65	218	357	393	395	395	395	395

Corn Growing Degree Days
50 M	2	8	41	123	253	347	490	490	345	173	23	3	2298
50 S	2	10	50	174	426	773	1263	1753	2098	2271	2295	2298	2298

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 Jul 28, 2006
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