OLD FAITHFUL, WYOMING

Period of Record General Climate Summary - Growing Degree Days

Station:(486845) OLD FAITHFUL
From Year=1904 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 0 2 21 113 296 531 486 225 44 1 0 1718
40 S 0 0 2 23 136 431 962 1448 1673 1717 1718 1718 1718
45 M 0 0 0 3 42 169 377 333 111 9 0 0 1046
45 S 0 0 0 4 46 215 593 926 1037 1046 1046 1046 1046
50 M 0 0 0 0 8 76 229 191 37 1 0 0 542
50 S 0 0 0 0 9 84 314 504 541 542 542 542 542
55 M 0 0 0 0 1 24 105 78 7 0 0 0 213
55 S 0 0 0 0 1 24 129 206 213 213 213 213 213
60 M 0 0 0 0 0 5 30 20 0 0 0 0 56
60 S 0 0 0 0 0 5 35 55 56 56 56 56 56
Corn Growing Degree Days
50 M 0 1 6 38 112 230 390 379 221 75 6 0 1458
50 S 0 1 7 44 156 386 776 1155 1376 1452 1458 1458 1458
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