HARTLINE, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(453529) HARTLINE
From Year=1927 To Year=2005
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	1	10	83	268	521	719	978	941	661	298	30	2	4511
40 S	1	11	93	361	882	1601	2579	3520	4181	4479	4509	4511	4511
45 M	0	1	24	145	369	569	823	786	511	171	5	0	3404
45 S	0	1	25	170	539	1108	1931	2717	3228	3399	3404	3404	3404
50 M	0	0	5	64	230	420	668	631	366	80	1	0	2465
50 S	0	0	5	69	299	719	1387	2018	2384	2464	2465	2465	2465
55 M	0	0	1	22	122	277	514	476	233	30	0	0	1675
55 S	0	0	1	22	145	422	936	1412	1645	1675	1675	1675	1675
60 M	0	0	0	5	53	156	362	327	127	9	0	0	1039
60 S	0	0	0	5	58	214	577	903	1030	1039	1039	1039	1039

Corn Growing Degree Days
50 M	0	5	53	174	330	450	617	595	417	189	13	0	2841
50 S	0	5	57	232	562	1011	1628	2223	2639	2828	2840	2841	2841

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