WATSONVILLE WATERWORKS, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(049473) WATSONVILLE WATERWORKS
From Year=1948 To Year=2005
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	286	333	410	463	555	613	669	687	674	612	435	302	6039
40 S	286	619	1029	1492	2047	2660	3329	4016	4690	5301	5737	6039	6039
45 M	147	196	256	313	400	463	514	532	524	457	286	159	4247
45 S	147	342	599	912	1312	1775	2289	2821	3345	3801	4088	4247	4247
50 M	51	84	121	170	245	313	359	377	374	302	150	55	2601
50 S	51	135	256	426	671	984	1343	1720	2094	2396	2546	2601	2601
55 M	8	22	37	63	106	166	204	222	224	157	54	9	1273
55 S	8	30	67	130	236	401	606	828	1052	1209	1264	1273	1273
60 M	0	3	7	18	29	50	67	80	92	58	13	0	417
60 S	0	3	10	28	57	108	174	254	346	404	416	417	417

Corn Growing Degree Days
50 M	156	177	215	247	290	328	363	380	380	347	251	169	3305
50 S	156	333	549	796	1086	1414	1777	2158	2537	2885	3136	3305	3305

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 Apr 5, 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