RICHMOND WSO AIRPORT, VIRGINIA

Period of Record General Climate Summary - Growing Degree Days

From Year=1948 To Year=2012
Station:(447201) RICHMOND WSO AIRPORT
Averages Daily Extremes
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 95 109 276 539 813 1033 1195 1150 909 594 305 126 7143
40 S 95 204 480 1019 1832 2864 4059 5209 6118 6712 7017 7143 7143
45 M 48 56 169 394 658 883 1040 995 759 441 192 65 5698
45 S 48 104 273 666 1324 2207 3246 4241 5000 5441 5633 5698 5698
50 M 21 25 94 262 503 733 885 840 609 298 106 30 4406
50 S 21 47 140 402 905 1638 2523 3362 3971 4269 4376 4406 4406
55 M 8 9 46 157 353 583 730 685 460 177 50 12 3269
55 S 8 17 63 220 573 1156 1885 2570 3030 3207 3257 3269 3269
60 M 2 3 19 83 218 433 575 530 316 90 18 4 2291
60 S 2 5 24 107 325 759 1334 1863 2179 2269 2287 2291 2291
Corn Growing Degree Days
50 M 59 71 171 330 514 696 820 792 600 362 184 75 4674
50 S 59 131 302 631 1145 1841 2661 3453 4053 4414 4599 4674 4674
Derived form the 1948-2012 Data
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 May 22,
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Southeast Regional Climate Center, SERCC Webmaster