ROANOKE WSO AIRPORT, VIRGINIA

Period of Record General Climate Summary - Growing Degree Days

From Year=1948 To Year=2012
Station:(447285) ROANOKE 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 77 93 248 497 766 974 1127 1090 841 539 254 99 6606
40 S 77 170 419 915 1682 2655 3783 4873 5714 6253 6507 6606 6606
45 M 35 44 147 355 611 824 972 935 691 388 150 46 5198
45 S 35 79 226 581 1192 2016 2988 3923 4614 5003 5153 5198 5198
50 M 14 17 78 229 457 674 817 780 541 252 75 18 3951
50 S 14 31 108 337 795 1468 2286 3066 3607 3859 3933 3951 3951
55 M 5 5 36 131 311 524 662 625 394 141 30 6 2869
55 S 5 9 45 176 488 1011 1674 2299 2692 2833 2863 2869 2869
60 M 1 1 13 65 185 375 507 470 255 63 9 1 1946
60 S 1 2 15 80 265 640 1148 1618 1873 1936 1945 1946 1946
Corn Growing Degree Days
50 M 45 59 150 296 479 652 772 745 542 320 146 55 4262
50 S 45 104 254 550 1029 1681 2453 3198 3740 4060 4206 4262 4262
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