IRON MOUNTAIN, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(044297) IRON MOUNTAIN
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	432	521	740	941	1241	1478	1699	1647	1408	1098	680	443	12327
40 S	432	953	1693	2634	3875	5353	7052	8699	10107	11204	11884	12327	12327
45 M	285	381	585	791	1086	1328	1544	1492	1258	943	530	292	10514
45 S	285	666	1251	2042	3128	4456	5999	7491	8750	9692	10222	10514	10514
50 M	154	247	431	641	931	1178	1389	1337	1108	788	382	158	8744
50 S	154	401	832	1473	2404	3582	4971	6308	7416	8204	8586	8744	8744
55 M	59	131	285	492	776	1028	1234	1182	958	633	245	61	7084
55 S	59	190	475	967	1743	2771	4005	5187	6145	6778	7024	7084	7084
60 M	14	52	160	348	621	878	1079	1027	808	480	131	13	5612
60 S	14	66	226	574	1195	2074	3152	4179	4987	5468	5599	5612	5612

Corn Growing Degree Days
50 M	238	301	451	603	796	921	1048	1019	883	704	411	244	7620
50 S	238	539	990	1593	2389	3310	4358	5377	6261	6965	7376	7620	7620

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