BROWNLEE DAM, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(101180) BROWNLEE DAM
From Year=1966 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	8	31	178	379	661	887	1208	1185	848	469	114	15	5983
40 S	8	40	218	597	1258	2145	3353	4537	5385	5854	5968	5983	5983
45 M	1	6	76	240	506	737	1053	1030	698	318	42	3	4710
45 S	1	7	83	323	829	1566	2619	3649	4347	4665	4707	4710	4710
50 M	0	0	23	128	357	587	898	875	548	185	10	0	3611
50 S	0	1	23	151	508	1096	1993	2868	3416	3601	3611	3611	3611
55 M	0	0	4	57	224	439	743	720	402	88	1	0	2679
55 S	0	0	4	61	285	725	1467	2187	2590	2678	2679	2679	2679
60 M	0	0	0	20	122	300	588	566	267	34	0	0	1898
60 S	0	0	0	21	143	443	1031	1597	1863	1898	1898	1898	1898

Corn Growing Degree Days
50 M	2	16	101	218	393	549	746	732	528	271	47	5	3606
50 S	2	18	119	337	730	1279	2025	2756	3284	3555	3601	3606	3606

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