SILVER BELL, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(027915) SILVER BELL
From Year=1906 To Year=1974
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	399	464	637	808	1084	1345	1421	1375	1243	1005	651	388	10820
40 S	399	863	1500	2307	3391	4736	6157	7532	8775	9781	10432	10820	10820
45 M	260	328	484	658	929	1195	1266	1220	1093	850	503	247	9034
45 S	260	589	1073	1731	2660	3854	5120	6340	7434	8284	8787	9034	9034
50 M	140	205	339	508	775	1045	1111	1065	943	695	360	134	7320
50 S	140	345	684	1192	1967	3011	4122	5187	6131	6826	7186	7320	7320
55 M	53	106	210	361	621	895	956	910	793	541	229	57	5733
55 S	53	159	369	731	1351	2246	3202	4112	4905	5447	5676	5733	5733
60 M	13	39	109	227	467	745	801	755	643	391	124	16	4331
60 S	13	52	161	388	855	1600	2401	3156	3799	4190	4314	4331	4331

Corn Growing Degree Days
50 M	207	255	380	514	719	870	927	905	832	665	391	202	6867
50 S	207	462	842	1356	2075	2945	3871	4777	5609	6274	6665	6867	6867

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