YELLOWSTONE PARK, WYOMING

Period of Record General Climate Summary - Growing Degree Days

Station:(489905) YELLOWSTONE PARK
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	0	1	10	68	248	460	732	684	391	155	14	0	2763
40 S	0	1	11	79	327	787	1519	2203	2594	2749	2763	2763	2763
45 M	0	0	1	24	136	317	577	529	260	73	2	0	1918
45 S	0	0	1	25	161	478	1054	1584	1844	1917	1918	1918	1918
50 M	0	0	0	5	58	191	423	377	148	23	0	0	1226
50 S	0	0	0	5	64	255	678	1055	1203	1226	1226	1226	1226
55 M	0	0	0	1	17	94	275	233	66	3	0	0	689
55 S	0	0	0	1	18	112	386	619	685	689	689	689	689
60 M	0	0	0	0	2	33	142	110	20	0	0	0	308
60 S	0	0	0	0	2	36	178	288	308	308	308	308	308

Corn Growing Degree Days
50 M	0	1	9	59	174	295	475	450	277	127	11	0	1879
50 S	0	1	10	70	244	540	1015	1464	1741	1868	1879	1879	1879

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