KENNEWICK, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(454154) KENNEWICK
From Year=1894 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	44	73	222	426	674	858	1100	1042	744	423	136	50	5795
40 S	44	118	340	766	1440	2299	3399	4442	5186	5609	5744	5795	5795
45 M	14	25	104	279	519	708	945	887	594	276	59	18	4429
45 S	14	39	142	422	941	1649	2595	3482	4076	4352	4411	4429	4429
50 M	3	5	33	149	365	558	790	732	445	150	18	4	3254
50 S	3	9	42	191	556	1114	1905	2637	3082	3232	3250	3254	3254
55 M	0	1	6	61	220	409	635	577	299	62	4	1	2276
55 S	0	1	7	68	288	697	1332	1910	2209	2271	2275	2276	2276
60 M	0	0	1	17	110	263	481	423	169	18	1	0	1481
60 S	0	0	1	18	128	391	871	1294	1463	1481	1481	1481	1481

Corn Growing Degree Days
50 M	17	36	136	266	414	536	690	659	471	259	61	19	3566
50 S	17	54	190	456	870	1407	2097	2756	3227	3486	3547	3566	3566

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