CHESTERTOWN, MARYLAND

Period of Record General Climate Summary - Growing Degree Days

From Year=1893 To Year=2011
Station:(181750) CHESTERTOWN
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 42 47 172 414 739 970 1145 1095 864 540 231 63 6323
40 S 42 88 260 675 1414 2384 3529 4624 5488 6029 6260 6323 6323
45 M 17 19 91 277 584 820 990 940 714 389 130 25 4996
45 S 17 36 127 404 988 1808 2798 3739 4452 4841 4971 4996 4996
50 M 6 7 43 162 430 670 835 785 564 250 62 8 3822
50 S 6 13 56 218 648 1319 2153 2939 3503 3752 3814 3822 3822
55 M 2 2 17 82 284 521 680 630 416 137 23 2 2797
55 S 2 3 21 103 388 908 1588 2219 2634 2771 2795 2797 2797
60 M 0 0 6 36 162 372 525 476 275 62 7 0 1921
60 S 0 1 6 43 204 577 1101 1577 1852 1914 1921 1921 1921
Corn Growing Degree Days
50 M 22 28 98 233 450 650 792 754 562 308 122 32 4052
50 S 22 50 148 381 832 1482 2274 3028 3590 3898 4020 4052 4052
Derived form the 1893-2011 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