WILLIAMSBURG 2 N, VIRGINIA

Period of Record General Climate Summary - Growing Degree Days

From Year=1948 To Year=2012
Station:(449151) WILLIAMSBURG 2 N
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 106 123 291 549 817 1020 1178 1141 926 619 340 151 7261
40 S 106 228 519 1068 1885 2905 4084 5225 6151 6770 7110 7261 7261
45 M 54 64 178 403 662 870 1023 986 776 465 218 81 5781
45 S 54 118 296 700 1362 2232 3255 4241 5018 5483 5701 5781 5781
50 M 24 30 99 270 507 720 868 831 626 319 123 38 4455
50 S 24 54 153 423 930 1650 2518 3350 3976 4295 4417 4455 4455
55 M 9 11 48 163 356 570 713 676 476 191 58 15 3287
55 S 9 20 68 231 587 1157 1870 2546 3023 3214 3271 3287 3287
60 M 2 3 20 85 220 421 558 521 330 96 21 5 2281
60 S 2 5 25 110 330 750 1309 1830 2160 2256 2276 2281 2281
Corn Growing Degree Days
50 M 67 81 185 344 523 690 813 790 618 378 204 90 4783
50 S 67 148 333 677 1199 1889 2702 3493 4111 4489 4693 4783 4783
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