SCOTTSDALE, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(027661) SCOTTSDALE
From Year=1968 To Year=1985
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	374	449	609	787	1108	1340	1566	1529	1282	922	550	359	10874
40 S	374	823	1432	2219	3327	4667	6233	7762	9044	9966	10515	10874	10874
45 M	229	309	455	637	953	1190	1411	1374	1132	767	400	213	9069
45 S	229	538	993	1630	2583	3773	5184	6558	7689	8457	8857	9069	9069
50 M	105	180	304	488	798	1040	1256	1219	982	613	258	93	7335
50 S	105	285	589	1076	1874	2914	4170	5389	6371	6984	7242	7335	7335
55 M	30	75	170	340	643	890	1101	1064	832	459	139	21	5765
55 S	30	105	276	616	1259	2148	3250	4313	5145	5604	5744	5765	5765
60 M	5	18	72	207	489	740	946	909	682	312	56	2	4437
60 S	5	23	95	302	790	1530	2476	3385	4067	4379	4435	4437	4437

Corn Growing Degree Days
50 M	265	315	398	501	675	784	953	942	786	591	371	264	6843
50 S	265	580	978	1479	2153	2937	3891	4832	5618	6209	6579	6843	6843

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