LEOLA, SOUTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(394891) LEOLA
From Year=1899 To Year=2007
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	185	506	766	967	923	564	252	31	1	4223
40 S	0	2	28	213	719	1485	2452	3375	3940	4191	4222	4223	4223
45 M	0	0	8	102	361	616	812	768	421	145	10	0	3245
45 S	0	0	8	110	471	1088	1900	2668	3089	3234	3245	3245	3245
50 M	0	0	2	49	231	467	657	613	287	72	2	0	2383
50 S	0	0	2	51	283	750	1407	2020	2308	2380	2383	2383	2383
55 M	0	0	0	20	126	322	502	459	174	29	0	0	1634
55 S	0	0	0	20	146	468	971	1430	1604	1633	1634	1634	1634
60 M	0	0	0	6	56	191	350	309	92	9	0	0	1013
60 S	0	0	0	6	62	253	603	912	1004	1013	1013	1013	1013

Corn Growing Degree Days
50 M	1	3	27	140	318	479	623	590	360	181	32	2	2755
50 S	1	4	31	171	489	968	1592	2181	2541	2722	2753	2755	2755

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