DONNER MEMORIAL ST PK, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(042467) DONNER MEMORIAL ST PK
From Year=1953 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	1	2	17	75	242	443	654	623	423	199	32	2	2713
40 S	1	3	21	96	338	781	1435	2058	2481	2680	2712	2713	2713
45 M	0	0	2	23	128	300	499	469	280	91	5	0	1796
45 S	0	0	2	25	152	452	951	1420	1700	1791	1796	1796	1796
50 M	0	0	0	3	51	173	346	316	153	28	0	0	1071
50 S	0	0	0	3	54	228	574	890	1043	1071	1071	1071	1071
55 M	0	0	0	0	13	77	201	174	58	4	0	0	527
55 S	0	0	0	0	13	90	291	465	524	527	527	527	527
60 M	0	0	0	0	1	23	85	66	12	0	0	0	188
60 S	0	0	0	0	1	24	110	176	188	188	188	188	188

Corn Growing Degree Days
50 M	5	16	38	96	214	338	474	462	355	216	59	9	2282
50 S	5	21	59	155	369	706	1180	1643	1998	2214	2273	2282	2282

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