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Period of Record General Climate Summary - Growing Degree Days

Station:(440385) BACK BAY WILDLIFE REFUG
From Year=1953 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 115 129 295 531 802 1026 1193 1167 990 736 428 197 7609
40 S 115 244 539 1070 1872 2898 4091 5258 6248 6984 7412 7609 7609
45 M 53 64 175 385 647 876 1038 1012 840 581 288 104 6063
45 S 53 117 292 677 1324 2199 3237 4249 5090 5670 5959 6063 6063
50 M 20 26 92 251 492 726 883 857 690 428 169 46 4680
50 S 20 46 138 388 881 1606 2489 3346 4037 4465 4634 4680 4680
55 M 5 8 39 143 342 576 728 702 540 282 81 14 3460
55 S 5 12 52 195 536 1112 1840 2542 3082 3364 3445 3460 3460
60 M 0 2 13 69 204 426 573 547 391 155 29 2 2412
60 S 0 2 15 84 289 715 1287 1835 2226 2381 2409 2412 2412
Corn Growing Degree Days
50 M 56 66 149 290 496 708 846 832 684 442 214 87 4870
50 S 56 122 271 561 1057 1764 2611 3442 4126 4568 4783 4870 4870
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 Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu