BLACK RIVER PUMPS, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(020808) BLACK RIVER PUMPS
From Year=1948 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	23	50	129	297	558	831	994	928	745	458	135	31	5180
40 S	23	73	202	499	1057	1889	2883	3811	4556	5013	5149	5180	5180
45 M	3	11	50	172	407	681	839	773	595	312	52	5	3902
45 S	3	15	65	238	644	1325	2164	2938	3533	3845	3897	3902	3902
50 M	0	1	12	75	263	531	684	618	445	181	12	0	2823
50 S	0	1	14	88	351	882	1566	2184	2629	2810	2822	2823	2823
55 M	0	0	1	21	137	382	529	463	297	79	1	0	1911
55 S	0	0	1	22	159	541	1071	1534	1831	1910	1911	1911	1911
60 M	0	0	0	3	50	239	374	309	160	22	0	0	1156
60 S	0	0	0	3	52	291	665	974	1134	1156	1156	1156	1156

Corn Growing Degree Days
50 M	48	72	138	249	396	534	639	601	474	319	139	60	3669
50 S	48	120	258	507	903	1437	2077	2678	3152	3471	3610	3669	3669

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