date! ,

Period of Record General Climate Summary - Growing Degree Days

Station:(323621) GRAND FORKS UNIV
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	0	13	156	471	736	911	849	521	210	16	0	3883
40 S	0	0	13	169	640	1375	2287	3136	3657	3867	3883	3883	3883
45 M	0	0	4	84	332	586	756	694	379	117	4	0	2957
45 S	0	0	4	88	419	1005	1762	2456	2835	2952	2957	2957	2957
50 M	0	0	1	39	212	438	601	539	251	56	1	0	2138
50 S	0	0	1	41	253	690	1292	1831	2082	2137	2138	2138	2138
55 M	0	0	0	16	120	296	447	386	146	21	0	0	1433
55 S	0	0	0	16	136	432	879	1266	1412	1433	1433	1433	1433
60 M	0	0	0	5	58	173	296	244	73	7	0	0	855
60 S	0	0	0	5	63	236	532	776	848	855	855	855	855

Corn Growing Degree Days
50 M	0	0	9	104	291	456	591	541	314	130	12	0	2449
50 S	0	0	9	113	404	860	1451	1992	2307	2437	2449	2449	2449

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