BLACK RIVER PUMPS, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(020808) BLACK RIVER PUMPS
From Year=1948 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	24	51	127	295	561	832	994	928	744	458	133	29	5177
40 S	24	76	203	498	1059	1891	2886	3813	4557	5015	5147	5177	5177
45 M	4	12	49	171	409	682	839	773	594	312	50	4	3899
45 S	4	15	65	236	645	1327	2167	2939	3533	3845	3895	3899	3899
50 M	0	1	12	74	265	532	684	618	444	181	11	0	2823
50 S	0	1	13	87	352	884	1569	2187	2630	2811	2823	2823	2823
55 M	0	0	1	21	139	383	529	463	296	79	1	0	1913
55 S	0	0	1	22	161	545	1074	1537	1833	1912	1913	1913	1913
60 M	0	0	0	3	52	240	374	308	159	23	0	0	1159
60 S	0	0	0	3	54	294	668	977	1136	1159	1159	1159	1159

Corn Growing Degree Days
50 M	48	72	136	248	398	534	638	601	473	319	136	59	3663
50 S	48	120	256	504	902	1436	2075	2676	3149	3468	3604	3663	3663

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 Jul 28, 2006
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