CIRCLE F RCH, NEW MEXICO

Period of Record General Climate Summary - Growing Degree Days

Station:(293145) FARNSWORTH RANCH
From Year=1942 To Year=1980
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	109	138	286	504	782	996	1147	1068	843	588	259	107	6826
40 S	109	247	533	1037	1818	2814	3961	5029	5871	6459	6719	6826	6826
45 M	45	62	166	359	627	846	992	913	693	437	145	42	5326
45 S	45	108	274	632	1259	2105	3097	4009	4702	5139	5284	5326	5326
50 M	15	20	79	224	472	696	837	758	544	291	63	10	4009
50 S	15	35	114	338	810	1506	2343	3101	3644	3936	3999	4009	4009
55 M	3	5	28	108	322	546	682	603	397	162	18	1	2875
55 S	3	8	36	144	466	1012	1694	2297	2694	2856	2874	2875	2875
60 M	0	0	6	31	187	397	527	448	256	67	3	0	1922
60 S	0	1	7	38	225	622	1149	1597	1853	1919	1922	1922	1922

Corn Growing Degree Days
50 M	125	153	262	384	518	617	736	693	542	416	225	130	4800
50 S	125	277	539	924	1442	2059	2795	3487	4030	4445	4670	4800	4800

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