PACKWOOD, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(456262) PACKWOOD
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	24	46	112	238	429	588	762	758	570	323	80	20	3950
40 S	24	70	183	420	849	1437	2199	2957	3527	3850	3930	3950	3950
45 M	4	9	35	116	279	438	607	603	420	183	22	2	2719
45 S	4	13	49	165	445	883	1490	2093	2513	2695	2717	2719	2719
50 M	0	1	6	44	152	291	453	448	273	79	3	0	1750
50 S	0	1	7	51	203	494	946	1395	1668	1747	1750	1750	1750
55 M	0	0	0	12	66	160	301	295	146	23	0	0	1004
55 S	0	0	0	12	78	238	540	835	981	1004	1004	1004	1004
60 M	0	0	0	2	22	69	164	157	58	4	0	0	477
60 S	0	0	0	2	24	93	258	415	473	477	477	477	477

Corn Growing Degree Days
50 M	10	32	77	147	248	335	464	468	357	197	36	6	2377
50 S	10	43	119	266	514	849	1313	1781	2138	2335	2371	2377	2377

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