ROCK SPRINGS, WYOMING

Period of Record General Climate Summary - Growing Degree Days

Station:(487840) ROCK SPRINGS
From Year=1898 To Year=1979
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	1	3	20	128	381	634	885	814	503	213	22	2	3605
40 S	1	4	25	153	533	1167	2052	2866	3369	3582	3604	3605	3605
45 M	0	0	4	54	243	486	730	659	359	103	4	0	2642
45 S	0	0	4	58	301	787	1517	2176	2535	2638	2642	2642	2642
50 M	0	0	0	15	128	342	576	504	225	33	0	0	1825
50 S	0	0	0	16	144	486	1062	1566	1791	1825	1825	1825	1825
55 M	0	0	0	2	49	211	421	351	113	6	0	0	1154
55 S	0	0	0	2	51	262	684	1035	1148	1154	1154	1154	1154
60 M	0	0	0	0	10	105	269	205	38	0	0	0	629
60 S	0	0	0	0	10	116	385	590	629	629	629	629	629

Corn Growing Degree Days
50 M	1	5	27	113	266	415	570	535	359	194	33	2	2520
50 S	1	6	32	145	412	826	1397	1931	2290	2484	2518	2520	2520

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