TACOMA 1, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(458278) TACOMA 1
From Year=1982 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	125	129	239	355	532	665	809	817	639	424	204	94	5032
40 S	125	254	494	848	1381	2046	2855	3672	4310	4734	4938	5032	5032
45 M	41	42	106	207	377	515	654	662	489	272	89	27	3482
45 S	41	83	189	396	774	1289	1943	2605	3094	3366	3455	3482	3482
50 M	6	6	28	88	226	365	499	507	339	137	24	4	2229
50 S	6	12	40	128	355	720	1219	1726	2065	2201	2225	2229	2229
55 M	1	1	3	25	104	217	344	352	193	45	3	0	1287
55 S	1	1	5	30	133	350	694	1046	1239	1284	1287	1287	1287
60 M	0	0	0	4	32	91	191	198	73	7	0	0	597
60 S	0	0	0	4	37	128	319	517	590	597	597	597	597

Corn Growing Degree Days
50 M	24	36	92	162	270	372	498	508	362	193	54	15	2586
50 S	24	60	152	314	585	957	1454	1962	2325	2518	2571	2586	2586

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