LOWER GRANITE DAM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(454835) LOWER GRANITE DAM
From Year=1965 To Year=1975
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	67	103	229	334	640	872	1148	1134	853	480	175	87	6123
40 S	67	170	399	733	1374	2246	3394	4528	5381	5861	6036	6123	6123
45 M	22	33	109	190	486	722	993	979	703	329	71	25	4662
45 S	22	54	163	354	839	1562	2554	3534	4236	4566	4637	4662	4662
50 M	4	6	38	82	335	572	838	824	553	193	13	2	3461
50 S	4	10	48	130	465	1038	1875	2700	3253	3445	3459	3461	3461
55 M	0	0	8	26	200	423	683	669	406	90	1	0	2507
55 S	0	0	9	35	235	658	1341	2010	2416	2505	2507	2507	2507
60 M	0	0	1	8	98	279	529	515	269	34	0	0	1731
60 S	0	0	1	8	106	385	914	1429	1698	1731	1731	1731	1731

Corn Growing Degree Days
50 M	18	38	109	169	371	536	724	717	528	253	57	23	3543
50 S	18	56	165	334	705	1241	1965	2682	3210	3464	3521	3543	3543

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 Oct 31, 2012
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