HARQUAHALA PLAINS, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(023852) HARQUAHALA PLAINS
From Year=1952 To Year=1979
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	262	388	579	686	1015	1306	1533	1461	1214	852	498	287	10080
40 S	262	650	1229	1915	2930	4236	5769	7230	8444	9296	9794	10080	10080
45 M	136	248	426	536	860	1156	1378	1306	1064	697	350	151	8307
45 S	136	384	810	1346	2206	3362	4740	6046	7110	7807	8157	8307	8307
50 M	49	123	275	387	705	1006	1223	1151	914	544	209	52	6636
50 S	49	172	446	833	1537	2544	3767	4917	5831	6375	6584	6636	6636
55 M	11	40	147	243	550	856	1068	996	764	393	98	7	5173
55 S	11	51	198	441	990	1847	2915	3910	4674	5068	5165	5173	5173
60 M	2	6	64	121	396	706	913	841	614	252	27	0	3942
60 S	2	8	72	193	589	1295	2208	3049	3663	3915	3942	3942	3942

Corn Growing Degree Days
50 M	241	301	393	475	617	756	907	882	738	552	391	253	6505
50 S	241	542	935	1409	2027	2783	3690	4572	5310	5862	6253	6505	6505

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