URBANNA WB CITY, VIRGINIA

Period of Record General Climate Summary - Growing Degree Days

From Year=1948 To Year=1973
Station:(448642) URBANNA WB CITY
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 115 108 251 531 809 1026 1184 1140 936 648 324 139 7211
40 S 115 222 473 1004 1813 2840 4024 5164 6100 6748 7072 7211 7211
45 M 61 53 148 386 654 876 1029 985 786 494 204 74 5751
45 S 61 114 262 647 1302 2178 3207 4192 4978 5472 5676 5751 5751
50 M 29 23 79 255 499 726 874 830 636 345 113 35 4444
50 S 29 51 130 385 884 1611 2485 3315 3951 4296 4410 4444 4444
55 M 11 7 37 152 348 576 719 675 487 212 51 14 3289
55 S 11 18 55 207 555 1132 1851 2526 3012 3224 3275 3289 3289
60 M 3 2 14 80 213 427 564 520 340 109 19 5 2295
60 S 3 5 19 99 312 739 1303 1823 2163 2272 2291 2295 2295
Corn Growing Degree Days
50 M 66 61 145 316 510 699 826 797 627 388 182 74 4692
50 S 66 128 272 589 1099 1798 2625 3421 4048 4436 4617 4692 4692
Derived form the 1948-1973 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