PETERSONS RANCH, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(451760) PETERSONS RANCH
From Year=1953 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	42	74	150	258	460	618	803	802	643	409	146	41	4445
40 S	42	116	266	524	983	1601	2404	3206	3849	4258	4404	4445	4445
45 M	6	19	59	136	308	468	648	647	493	259	53	5	3102
45 S	6	25	85	221	529	997	1645	2292	2784	3044	3097	3102	3102
50 M	0	3	16	60	180	319	493	492	344	134	11	0	2052
50 S	0	3	19	79	259	578	1071	1563	1908	2041	2052	2052	2052
55 M	0	0	3	20	92	188	340	339	207	54	1	0	1245
55 S	0	0	3	23	115	303	643	982	1189	1243	1245	1245	1245
60 M	0	0	0	5	39	96	203	199	105	15	0	0	662
60 S	0	0	0	5	44	140	343	542	647	662	662	662	662

Corn Growing Degree Days
50 M	6	24	68	128	241	344	483	483	365	191	37	4	2375
50 S	6	30	98	226	467	812	1294	1778	2143	2334	2371	2375	2375

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