MACKAY LOST RIVER RS, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(105462) MACKAY RANGER STN
From Year=1908 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	0	0	15	118	329	548	821	761	479	192	13	0	3277
40 S	0	0	16	133	462	1011	1832	2593	3071	3264	3277	3277	3277
45 M	0	0	3	49	198	401	666	606	335	94	2	0	2354
45 S	0	0	3	52	250	651	1317	1923	2258	2352	2354	2354	2354
50 M	0	0	0	14	98	263	511	452	203	33	0	0	1574
50 S	0	0	0	14	112	375	886	1338	1541	1574	1574	1574	1574
55 M	0	0	0	2	36	146	358	300	96	7	0	0	946
55 S	0	0	0	2	38	185	543	843	940	946	946	946	946
60 M	0	0	0	0	8	62	212	161	29	1	0	0	474
60 S	0	0	0	0	9	71	283	444	473	474	474	474	474

Corn Growing Degree Days
50 M	0	1	19	107	235	363	528	501	348	167	20	0	2290
50 S	0	1	20	127	362	725	1253	1754	2102	2270	2290	2290	2290

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