HALIFAX 2 SSE, VIRGINIA

Period of Record General Climate Summary - Growing Degree Days

From Year=1955 To Year=1977
Station:(443695) HALIFAX 2 SSE
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 81 99 251 522 796 993 1137 1106 873 560 281 114 6814
40 S 81 180 432 954 1750 2743 3880 4986 5859 6419 6700 6814 6814
45 M 36 49 149 378 641 843 982 951 723 410 173 59 5393
45 S 36 85 234 612 1253 2096 3078 4028 4751 5161 5334 5393 5393
50 M 15 20 79 250 487 693 827 796 573 272 93 25 4132
50 S 15 35 115 365 853 1545 2372 3168 3741 4013 4107 4132 4132
55 M 4 6 37 150 340 543 672 641 425 156 42 8 3024
55 S 4 10 47 198 538 1080 1753 2393 2818 2973 3016 3024 3024
60 M 0 1 14 80 208 395 517 486 283 70 15 2 2071
60 S 0 2 15 96 303 698 1215 1701 1984 2054 2070 2071 2071
Corn Growing Degree Days
50 M 49 64 160 323 503 665 779 756 570 341 173 67 4449
50 S 49 113 273 596 1099 1763 2542 3299 3869 4210 4383 4449 4449
Derived form the 1955-1977 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