IDAHO CITY, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(104442) IDAHO CITY
From Year=1931 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	0	2	25	139	363	557	819	777	495	226	24	1	3428
40 S	0	2	27	166	530	1087	1905	2682	3178	3403	3427	3428	3428
45 M	0	0	4	59	228	408	664	622	351	117	5	0	2457
45 S	0	0	4	63	291	699	1363	1985	2336	2453	2457	2457	2457
50 M	0	0	0	18	120	267	509	468	220	44	0	0	1647
50 S	0	0	0	18	138	405	914	1381	1602	1646	1647	1647	1647
55 M	0	0	0	4	50	148	356	318	114	10	0	0	999
55 S	0	0	0	4	53	201	557	875	989	999	999	999	999
60 M	0	0	0	0	14	63	213	180	43	1	0	0	515
60 S	0	0	0	0	15	78	291	471	514	515	515	515	515

Corn Growing Degree Days
50 M	0	7	41	148	291	394	536	525	399	232	34	1	2609
50 S	0	8	49	197	488	882	1417	1943	2341	2573	2608	2609	2609

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