MC NARY DAM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(455231) MC NARY DAM
From Year=1954 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	36	67	198	389	642	837	1084	1063	767	446	141	45	5716
40 S	36	102	301	690	1332	2169	3253	4316	5084	5529	5670	5716	5716
45 M	8	17	81	241	487	687	929	908	617	295	55	11	4337
45 S	8	25	106	347	834	1521	2450	3359	3976	4271	4326	4337	4337
50 M	1	3	18	115	333	537	774	753	467	161	14	1	3178
50 S	1	3	22	137	470	1008	1781	2535	3002	3163	3176	3178	3178
55 M	0	0	2	40	194	388	619	598	320	67	2	0	2232
55 S	0	0	2	43	237	625	1244	1842	2162	2229	2231	2232	2232
60 M	0	0	0	10	92	245	464	443	185	20	0	0	1459
60 S	0	0	0	10	102	347	811	1254	1439	1459	1459	1459	1459

Corn Growing Degree Days
50 M	11	28	104	215	373	519	695	689	476	244	51	14	3418
50 S	11	39	143	358	731	1250	1945	2634	3110	3354	3404	3418	3418

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