HANNAH 2 N, NORTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(323936) HANNAH
From Year=1905 To Year=1985
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	7	96	365	626	816	755	435	164	7	0	3271
40 S	0	0	7	103	468	1094	1910	2665	3100	3263	3270	3271	3271
45 M	0	0	2	46	240	478	661	600	301	88	1	0	2416
45 S	0	0	2	48	287	765	1426	2026	2327	2415	2416	2416	2416
50 M	0	0	0	19	140	334	507	446	187	40	0	0	1672
50 S	0	0	0	19	158	492	999	1445	1632	1672	1672	1672	1672
55 M	0	0	0	7	72	203	355	300	101	14	0	0	1050
55 S	0	0	0	7	78	281	636	936	1037	1050	1050	1050	1050
60 M	0	0	0	2	31	103	214	174	47	3	0	0	574
60 S	0	0	0	2	33	136	349	524	571	574	574	574	574

Corn Growing Degree Days
50 M	0	0	6	75	243	385	520	478	281	122	7	0	2117
50 S	0	0	6	81	324	709	1229	1706	1988	2109	2117	2117	2117

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