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Period of Record General Climate Summary - Growing Degree Days

Station:(475255) MEDFORD 1 SW
From Year=1889 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	0	0	21	155	449	713	879	812	530	229	30	1	3820
40 S	0	0	22	176	626	1339	2218	3030	3560	3789	3819	3820	3820
45 M	0	0	9	84	310	563	724	657	386	132	10	0	2876
45 S	0	0	9	93	403	966	1690	2347	2734	2865	2876	2876	2876
50 M	0	0	3	40	192	416	569	502	257	65	3	0	2047
50 S	0	0	3	44	235	651	1220	1722	1979	2044	2047	2047	2047
55 M	0	0	1	17	102	276	414	350	150	26	0	0	1338
55 S	0	0	1	17	120	396	810	1161	1311	1337	1338	1338	1338
60 M	0	0	0	6	45	157	265	209	76	8	0	0	767
60 S	0	0	0	6	51	209	474	683	759	767	767	767	767

Corn Growing Degree Days
50 M	0	0	14	105	278	445	568	516	319	136	16	0	2398
50 S	0	0	14	120	397	843	1410	1926	2246	2382	2398	2398	2398

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