VIENNA TYSONS CORNER, VIRGINIA

Period of Record General Climate Summary - Growing Degree Days

From Year=1925 To Year=2012
Station:(448737) VIENNA TYSONS CORNER
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 62 66 187 436 679 923 1069 1053 804 476 233 67 6054
40 S 62 129 315 752 1430 2354 3422 4475 5279 5755 5988 6054 6054
45 M 29 29 105 296 524 773 914 898 654 328 129 29 4708
45 S 29 58 163 460 983 1757 2670 3568 4222 4550 4679 4708 4708
50 M 13 11 55 181 372 623 759 743 504 199 61 12 3533
50 S 13 24 79 260 633 1256 2015 2757 3261 3461 3522 3533 3533
55 M 5 3 25 98 234 474 604 588 357 102 22 4 2514
55 S 5 8 33 131 365 838 1442 2029 2386 2488 2510 2514 2514
60 M 1 0 9 46 125 327 449 433 218 41 6 1 1657
60 S 1 1 11 57 182 509 958 1390 1609 1649 1655 1657 1657
Corn Growing Degree Days
50 M 36 42 116 253 400 618 745 732 510 256 124 37 3867
50 S 36 78 194 446 846 1464 2209 2941 3450 3706 3830 3867 3867
Derived form the 1925-2012 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