FREE UNION, VIRGINIA

Period of Record General Climate Summary - Growing Degree Days

From Year=1955 To Year=2012
Station:(443213) FREE UNION
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 32 62 251 511 730 932 961 1058 793 521 217 64 6132
40 S 32 94 345 856 1586 2518 3479 4537 5329 5850 6068 6132 6132
45 M 11 24 151 364 575 782 806 903 643 375 109 27 4769
45 S 11 35 186 550 1125 1907 2713 3616 4258 4634 4743 4769 4769
50 M 3 8 79 237 422 632 651 748 493 247 43 7 3569
50 S 3 11 90 327 748 1380 2031 2779 3272 3519 3562 3569 3569
55 M 1 2 33 136 279 482 496 593 344 136 11 2 2514
55 S 1 3 36 171 450 932 1428 2021 2366 2502 2513 2514 2514
60 M 0 0 11 63 154 335 341 438 203 60 1 0 1605
60 S 0 0 11 74 228 563 904 1342 1545 1604 1605 1605 1605
Corn Growing Degree Days
50 M 34 66 195 334 453 627 647 723 500 316 155 48 4098
50 S 34 100 295 629 1082 1709 2356 3079 3579 3895 4050 4098 4098
Derived form the 1955-2012 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