HAGERSTOWN, MARYLAND

Period of Record General Climate Summary - Growing Degree Days

From Year=1895 To Year=1993
Station:(183975) HAGERSTOWN
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 27 40 153 403 723 939 1099 1045 803 492 192 48 5965
40 S 27 67 220 624 1347 2286 3385 4429 5232 5725 5917 5965 5965
45 M 10 16 82 271 568 789 944 890 653 345 105 19 4692
45 S 10 26 108 379 947 1737 2680 3570 4223 4569 4673 4692 4692
50 M 3 5 39 164 415 639 789 735 504 215 48 7 3564
50 S 3 9 48 212 627 1266 2055 2790 3294 3509 3557 3564 3564
55 M 1 1 15 89 273 490 634 580 359 115 18 2 2577
55 S 1 2 18 107 380 870 1503 2083 2442 2557 2575 2577 2577
60 M 0 0 5 41 155 342 479 425 228 50 5 1 1731
60 S 0 0 5 46 201 543 1022 1447 1675 1725 1730 1731 1731
Corn Growing Degree Days
50 M 15 23 93 238 448 622 744 704 515 290 98 24 3814
50 S 15 38 131 369 817 1439 2183 2887 3402 3691 3789 3814 3814
Derived form the 1895-1993 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