RIGGINS, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(107706) RIGGINS
From Year=1940 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	28	78	204	383	619	807	1097	1090	781	457	127	32	5702
40 S	28	106	309	692	1312	2118	3215	4306	5086	5544	5670	5702	5702
45 M	5	22	96	242	465	657	942	935	631	309	49	6	4359
45 S	5	26	122	364	829	1486	2428	3363	3994	4303	4352	4359	4359
50 M	0	4	32	130	317	507	787	780	481	180	13	0	3233
50 S	0	4	36	166	484	991	1778	2558	3040	3220	3232	3233	3233
55 M	0	0	7	57	190	360	632	626	339	87	2	0	2300
55 S	0	0	7	65	254	615	1247	1872	2211	2298	2300	2300	2300
60 M	0	0	1	18	95	226	478	472	213	33	0	0	1537
60 S	0	0	1	19	114	340	819	1291	1504	1536	1537	1537	1537

Corn Growing Degree Days
50 M	6	40	126	241	380	494	672	663	481	276	53	7	3440
50 S	6	46	173	414	793	1288	1959	2622	3104	3380	3433	3440	3440

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