GREENWATER, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(453357) GREENWATER
From Year=1939 To Year=1981
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	6	17	38	127	326	454	616	593	443	212	41	9	2882
40 S	6	22	60	188	514	968	1583	2177	2620	2832	2873	2882	2882
45 M	1	2	7	46	185	305	461	438	294	95	8	1	1843
45 S	1	3	10	56	241	546	1007	1445	1740	1835	1842	1843	1843
50 M	0	0	1	12	84	166	306	284	159	28	1	0	1041
50 S	0	0	1	13	97	263	569	853	1012	1040	1041	1041	1041
55 M	0	0	0	2	30	68	162	142	62	5	0	0	470
55 S	0	0	0	2	32	100	262	404	465	470	470	470	470
60 M	0	0	0	0	8	21	62	47	14	0	0	0	152
60 S	0	0	0	0	8	29	91	138	152	152	152	152	152

Corn Growing Degree Days
50 M	2	10	29	81	188	243	363	351	263	112	14	1	1658
50 S	2	12	41	122	309	552	916	1267	1530	1642	1656	1658	1658

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