MIDWAY SAND ISLAND, PACIFIC OCEAN

Period of Record General Climate Summary - Growing Degree Days

Station:(914490) MIDWAY SAND ISLAND
From Year=1953 To Year=1991
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	810	721	818	836	972	1102	1195	1228	1179	1122	964	876	11822
40 S	810	1531	2349	3185	4156	5259	6454	7681	8860	9982	10946	11822	11822
45 M	655	580	663	686	817	952	1040	1073	1029	967	814	721	9996
45 S	655	1234	1898	2584	3400	4353	5393	6465	7494	8461	9275	9996	9996
50 M	500	439	508	536	662	802	885	918	879	812	664	566	8169
50 S	500	938	1447	1982	2644	3446	4332	5249	6128	6940	7604	8169	8169
55 M	345	298	353	386	507	652	730	763	729	657	514	411	6343
55 S	345	642	996	1381	1888	2540	3270	4033	4762	5419	5933	6343	6343
60 M	191	157	199	236	352	502	575	608	579	502	364	256	4520
60 S	191	348	547	783	1135	1637	2212	2820	3399	3900	4264	4520	4520

Corn Growing Degree Days
50 M	500	439	508	536	662	801	883	913	876	812	664	566	8158
50 S	500	938	1447	1983	2644	3446	4328	5241	6117	6928	7592	8158	8158

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