WILLIAMSON, WEST VIRGINIA

Period of Record General Climate Summary - Growing Degree Days

From Year=1900 To Year=1993
Station:(469605) WILLIAMSON
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 91 253 484 785 998 1144 1104 893 559 233 90 6712
40 S 77 168 421 905 1690 2688 3832 4937 5830 6388 6621 6712 6712
45 M 36 43 154 347 630 848 989 949 743 410 136 42 5328
45 S 36 79 233 580 1210 2058 3048 3997 4740 5151 5287 5328 5328
50 M 14 16 83 227 478 698 834 794 593 274 69 15 4096
50 S 14 31 113 341 818 1516 2351 3145 3738 4012 4081 4096 4096
55 M 4 5 37 132 333 548 679 640 445 160 28 4 3015
55 S 4 9 46 178 511 1059 1739 2378 2823 2983 3011 3015 3015
60 M 1 1 13 63 204 400 524 485 304 77 8 0 2080
60 S 1 1 14 78 282 682 1206 1691 1995 2071 2080 2080 2080
Corn Growing Degree Days
50 M 52 68 174 309 497 662 774 746 581 353 157 58 4430
50 S 52 120 294 603 1100 1762 2536 3281 3862 4215 4372 4430 4430
Derived form the 1900-1993 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