HARPER, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(353666) HARPER 1 S
From Year=1919 To Year=1975
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	5	13	92	266	531	738	997	914	576	277	42	12	4462
40 S	5	18	110	376	907	1645	2642	3556	4132	4409	4451	4462	4462
45 M	1	2	30	144	379	588	842	759	427	152	10	3	3339
45 S	1	3	34	178	557	1145	1987	2746	3174	3326	3336	3339	3339
50 M	0	0	6	61	239	439	687	604	286	63	1	1	2388
50 S	0	0	6	67	307	745	1433	2037	2323	2386	2387	2388	2388
55 M	0	0	1	17	124	294	532	450	163	18	0	0	1599
55 S	0	0	1	18	142	436	969	1418	1581	1599	1599	1599	1599
60 M	0	0	0	3	50	166	379	300	70	3	0	0	971
60 S	0	0	0	3	53	219	598	898	968	971	971	971	971

Corn Growing Degree Days
50 M	3	15	99	226	375	469	606	572	424	251	47	6	3093
50 S	3	18	117	343	717	1187	1793	2365	2789	3040	3087	3093	3093

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