HOLBROOK, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(024089) HOLBROOK
From Year=1893 To Year=2010
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	25	73	202	404	670	927	1142	1086	840	496	148	30	6043
40 S	25	98	300	704	1374	2301	3442	4528	5369	5865	6014	6043	6043
45 M	5	22	96	265	516	777	987	931	690	347	62	7	4703
45 S	5	27	123	387	903	1679	2666	3597	4287	4634	4696	4703	4703
50 M	0	5	32	145	364	627	832	776	541	209	16	1	3547
50 S	0	5	37	182	546	1173	2004	2780	3321	3530	3546	3547	3547
55 M	0	1	7	60	224	477	677	621	392	98	2	0	2557
55 S	0	1	7	67	291	768	1444	2065	2457	2555	2557	2557	2557
60 M	0	0	1	16	107	329	522	466	248	31	0	0	1720
60 S	0	0	1	18	124	454	975	1441	1689	1720	1720	1720	1720

Corn Growing Degree Days
50 M	46	99	205	322	467	573	707	688	544	374	169	53	4248
50 S	46	145	350	672	1139	1712	2420	3107	3652	4026	4195	4248	4248

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