YELLOWSTONE PARK, WYOMING

Period of Record General Climate Summary - Growing Degree Days

Station:(489905) YELLOWSTONE PARK
From Year=1894 To Year=2012
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 9 70 244 450 727 684 387 151 14 0 2739
40 S 0 1 10 80 325 774 1502 2186 2573 2724 2739 2739 2739
45 M 0 0 1 25 134 307 573 530 255 69 2 0 1895
45 S 0 0 1 26 159 466 1039 1568 1824 1892 1895 1895 1895
50 M 0 0 0 6 58 182 419 377 144 21 0 0 1207
50 S 0 0 0 6 63 246 665 1042 1186 1207 1207 1207 1207
55 M 0 0 0 1 17 88 271 231 62 3 0 0 674
55 S 0 0 0 1 18 106 377 608 671 674 674 674 674
60 M 0 0 0 0 2 31 140 108 18 0 0 0 298
60 S 0 0 0 0 2 33 173 280 298 298 298 298 298
Corn Growing Degree Days
50 M 0 1 9 59 171 287 471 450 272 122 10 0 1850
50 S 0 1 9 69 239 526 997 1447 1718 1840 1850 1850 1850
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