CLARKSVILLE, VIRGINIA

Period of Record General Climate Summary - Growing Degree Days

From Year=1891 To Year=2012
Station:(441746) CLARKSVILLE
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 146 131 319 551 851 1097 1221 1193 933 605 299 121 7468
40 S 146 277 596 1147 1999 3096 4317 5510 6443 7048 7347 7468 7468
45 M 77 62 200 411 696 947 1066 1038 783 453 180 56 5970
45 S 77 139 339 750 1446 2393 3460 4498 5281 5734 5914 5970 5970
50 M 33 23 112 279 541 797 911 883 633 310 91 22 4637
50 S 33 56 168 447 989 1786 2697 3580 4213 4523 4614 4637 4637
55 M 11 7 56 168 389 647 756 728 483 185 35 7 3472
55 S 11 18 74 242 630 1277 2034 2762 3245 3430 3465 3472 3472
60 M 3 1 21 87 248 497 601 573 337 92 9 2 2473
60 S 3 4 26 113 361 858 1460 2032 2370 2462 2471 2473 2473
Corn Growing Degree Days
50 M 102 99 213 348 544 740 825 808 615 380 208 86 4968
50 S 102 201 414 762 1306 2046 2871 3679 4295 4674 4882 4968 4968
Derived form the 1891-2012 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