ABERDEEN RGNL AP, SOUTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(390020) ABERDEEN WSO AP
From Year=1893 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	2	35	210	525	792	1004	937	598	262	30	1	4397
40 S	0	2	37	247	773	1565	2570	3506	4104	4366	4396	4397	4397
45 M	0	0	13	121	380	643	849	782	453	157	9	0	3408
45 S	0	0	14	135	515	1157	2007	2789	3242	3399	3408	3408	3408
50 M	0	0	4	62	249	493	694	627	318	82	2	0	2533
50 S	0	0	4	66	316	809	1504	2131	2449	2530	2533	2533	2533
55 M	0	0	1	27	144	349	539	472	202	35	0	0	1771
55 S	0	0	1	28	173	521	1061	1533	1736	1771	1771	1771	1771
60 M	0	0	0	10	71	217	386	323	114	12	0	0	1133
60 S	0	0	0	10	81	298	684	1007	1121	1133	1133	1133	1133

Corn Growing Degree Days
50 M	1	3	32	151	327	497	650	602	379	186	32	2	2862
50 S	1	4	36	187	515	1011	1662	2264	2643	2829	2860	2862	2862

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