LEWES, DELAWARE

Period of Record General Climate Summary - Growing Degree Days

From Year=1945 To Year=2011
Station:(075320) LEWES
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 78 79 194 426 717 962 1133 1093 881 589 300 116 6567
40 S 78 158 352 777 1494 2455 3589 4681 5562 6151 6451 6567 6567
45 M 38 38 107 287 562 812 978 938 731 436 185 56 5167
45 S 38 76 183 470 1032 1843 2822 3760 4490 4926 5111 5167 5167
50 M 16 16 55 173 408 662 823 783 581 291 100 24 3931
50 S 16 31 86 259 667 1329 2152 2935 3516 3807 3907 3931 3931
55 M 5 5 25 93 265 512 668 628 432 169 45 8 2856
55 S 5 11 36 128 394 905 1574 2202 2634 2803 2848 2856 2856
60 M 1 1 10 43 150 364 513 473 289 81 16 2 1944
60 S 1 3 13 56 206 570 1084 1556 1845 1926 1942 1944 1944
Corn Growing Degree Days
50 M 40 43 105 233 427 643 789 760 580 340 156 56 4172
50 S 40 84 189 422 849 1492 2280 3040 3620 3960 4116 4172 4172
Derived form the 1945-2011 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