MOUNT SHASTA, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(045983) MOUNT SHASTA
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	18	42	94	210	425	627	852	808	613	350	88	21	4148
40 S	18	60	155	365	790	1417	2269	3077	3690	4040	4127	4148	4148
45 M	2	9	32	109	282	478	697	653	464	214	30	3	2972
45 S	2	10	43	151	433	912	1608	2261	2725	2939	2969	2972	2972
50 M	0	1	7	43	163	334	542	498	319	107	6	0	2021
50 S	0	1	8	50	213	547	1089	1587	1907	2014	2020	2021	2021
55 M	0	0	1	10	77	204	388	345	190	41	1	0	1257
55 S	0	0	1	11	88	291	680	1025	1216	1256	1257	1257	1257
60 M	0	0	0	1	26	102	241	202	88	11	0	0	672
60 S	0	0	0	1	27	130	371	573	662	672	672	672	672

Corn Growing Degree Days
50 M	13	36	76	153	274	395	538	512	402	239	62	17	2717
50 S	13	49	125	278	552	947	1486	1998	2400	2638	2700	2717	2717

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