DOWNIEVILLE, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(042500) DOWNIEVILLE
From Year=1948 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	32	80	172	300	501	695	904	865	694	461	148	36	4890
40 S	32	113	285	585	1086	1781	2685	3550	4244	4705	4854	4890	4890
45 M	5	23	75	176	352	546	749	710	544	313	59	5	3556
45 S	5	27	102	278	631	1176	1925	2635	3179	3492	3551	3556	3556
50 M	0	3	20	81	218	399	594	555	396	180	14	0	2460
50 S	0	3	23	105	323	721	1315	1870	2266	2445	2459	2460	2460
55 M	0	0	3	26	109	259	439	401	254	79	1	0	1572
55 S	0	0	3	29	138	397	836	1237	1492	1571	1572	1572	1572
60 M	0	0	0	4	41	139	287	251	131	24	0	0	877
60 S	0	0	0	4	45	184	471	721	853	877	877	877	877

Corn Growing Degree Days
50 M	31	72	140	226	337	443	564	545	463	341	116	28	3306
50 S	31	103	243	469	806	1249	1813	2358	2820	3161	3277	3306	3306

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 Jul 28, 2006
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