ORLAND, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(046506) ORLAND
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	175	284	426	578	833	1025	1196	1137	986	751	389	189	7968
40 S	175	459	885	1463	2296	3321	4517	5654	6639	7390	7779	7968	7968
45 M	69	155	276	429	678	875	1041	982	836	596	244	77	6257
45 S	69	224	499	928	1607	2481	3522	4504	5340	5936	6180	6257	6257
50 M	17	60	145	285	524	725	886	827	686	442	123	19	4737
50 S	17	77	221	507	1030	1755	2640	3467	4153	4595	4718	4737	4737
55 M	2	14	57	161	372	575	731	672	536	293	45	3	3460
55 S	2	16	73	234	606	1181	1911	2583	3119	3412	3457	3460	3460
60 M	0	1	15	72	234	426	576	517	387	163	11	0	2403
60 S	0	2	17	89	323	749	1325	1842	2229	2391	2402	2403	2403

Corn Growing Degree Days
50 M	84	151	241	347	514	644	739	700	609	461	217	93	4799
50 S	84	235	475	823	1337	1981	2719	3419	4028	4489	4706	4799	4799

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