JOHN DAY, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(354291) JOHN DAY
From Year=1903 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	19	38	98	205	429	639	892	860	594	309	84	22	4188
40 S	19	57	154	359	789	1428	2320	3180	3773	4083	4166	4188	4188
45 M	4	9	36	107	286	490	737	705	446	184	30	5	3038
45 S	4	13	48	155	441	931	1669	2373	2819	3003	3033	3038	3038
50 M	0	1	9	46	168	345	582	550	306	91	8	1	2106
50 S	0	1	10	56	225	569	1151	1701	2007	2098	2106	2106	2106
55 M	0	0	1	15	85	215	429	397	183	35	1	0	1361
55 S	0	0	1	16	101	315	744	1142	1325	1360	1361	1361	1361
60 M	0	0	0	3	35	112	282	253	90	9	0	0	784
60 S	0	0	0	3	38	150	432	686	776	784	784	784	784

Corn Growing Degree Days
50 M	10	32	84	158	288	404	547	532	413	247	62	12	2790
50 S	10	42	126	285	572	976	1523	2055	2469	2716	2777	2790	2790

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