NORFOLK WSO AIRPORT, VIRGINIA

Period of Record General Climate Summary - Growing Degree Days

From Year=1946 To Year=2012
Station:(446139) NORFOLK WSO AIRPORT
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 136 139 304 551 829 1048 1213 1174 972 680 384 186 7618
40 S 136 275 580 1131 1960 3008 4221 5395 6366 7047 7431 7618 7618
45 M 73 75 189 404 674 898 1058 1019 822 526 252 103 6093
45 S 73 149 337 742 1415 2313 3372 4391 5212 5738 5990 6093 6093
50 M 35 36 107 269 519 748 903 864 672 375 146 50 4724
50 S 35 71 178 447 966 1714 2617 3481 4152 4527 4673 4724 4724
55 M 13 14 54 160 367 598 748 709 522 235 73 20 3513
55 S 13 28 81 241 608 1206 1955 2664 3185 3420 3493 3513 3513
60 M 4 4 23 84 229 448 593 554 373 124 29 6 2472
60 S 4 8 31 115 345 793 1386 1940 2313 2436 2466 2472 2472
Corn Growing Degree Days
50 M 73 78 162 309 519 719 854 829 660 399 199 94 4895
50 S 73 151 313 622 1141 1860 2714 3543 4204 4602 4801 4895 4895
Derived form the 1946-2012 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