WILMINGTON PORTER RSVR, DELAWARE

Period of Record General Climate Summary - Growing Degree Days

From Year=1931 To Year=2012
Station:(079605) WILMINGTON PORTER RSVR
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 34 37 140 369 692 936 1105 1058 817 501 210 54 5953
40 S 34 71 212 580 1272 2208 3313 4371 5188 5689 5899 5953 5953
45 M 13 14 71 236 537 786 950 903 667 352 116 20 4666
45 S 13 27 98 334 871 1657 2608 3510 4178 4530 4646 4666 4666
50 M 4 4 32 131 384 636 795 748 518 219 53 6 3531
50 S 4 8 40 171 555 1191 1986 2734 3252 3471 3525 3531 3531
55 M 1 1 12 64 244 486 640 593 371 116 19 1 2549
55 S 1 2 14 78 322 808 1448 2041 2413 2528 2548 2549 2549
60 M 0 0 4 27 132 339 485 438 235 49 5 0 1714
60 S 0 0 4 31 163 501 987 1425 1660 1709 1714 1714 1714
Corn Growing Degree Days
50 M 16 19 75 198 409 625 769 731 523 273 100 24 3762
50 S 16 35 111 309 718 1343 2112 2843 3366 3639 3739 3762 3762
Derived form the 1931-2012 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