NAVAJO, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(025837) NAVAJO
From Year=1892 To Year=1976
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	5	33	124	272	536	816	1058	968	701	380	94	10	4998
40 S	5	39	162	434	970	1787	2844	3812	4513	4893	4988	4998	4998
45 M	0	6	49	152	384	666	903	813	551	243	31	1	3800
45 S	0	6	55	207	592	1258	2160	2973	3525	3768	3799	3800	3800
50 M	0	0	12	62	241	516	748	658	403	126	5	0	2772
50 S	0	0	13	74	315	832	1579	2237	2640	2767	2772	2772	2772
55 M	0	0	2	15	120	367	593	503	259	45	1	0	1903
55 S	0	0	2	16	136	504	1096	1599	1858	1903	1903	1903	1903
60 M	0	0	0	2	39	226	438	348	129	6	0	0	1188
60 S	0	0	0	2	41	267	704	1053	1182	1188	1188	1188	1188

Corn Growing Degree Days
50 M	18	61	145	256	418	523	657	614	465	303	116	22	3597
50 S	18	79	224	480	898	1421	2078	2691	3156	3459	3575	3597	3597

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