CHEWELAH, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(451395) CHEWELAH
From Year=1948 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	1	8	56	216	462	643	834	813	529	206	25	2	3795
40 S	1	9	65	281	743	1386	2220	3033	3562	3769	3793	3795	3795
45 M	0	1	13	104	311	493	679	658	382	98	5	0	2745
45 S	0	1	14	118	429	922	1602	2259	2641	2739	2745	2745	2745
50 M	0	0	1	39	181	345	525	503	244	36	1	0	1875
50 S	0	0	2	41	222	567	1091	1594	1839	1874	1875	1875	1875
55 M	0	0	0	11	87	210	371	350	132	9	0	0	1170
55 S	0	0	0	11	99	308	680	1030	1162	1170	1170	1170	1170
60 M	0	0	0	2	32	104	228	210	54	1	0	0	631
60 S	0	0	0	2	35	138	367	576	630	631	631	631	631

Corn Growing Degree Days
50 M	0	6	52	164	307	409	524	519	387	179	12	0	2559
50 S	0	6	58	222	529	939	1463	1981	2368	2547	2559	2559	2559

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