WESTERNPORT, MARYLAND

Period of Record General Climate Summary - Growing Degree Days

From Year=1894 To Year=1968
Station:(189405) WESTERNPORT
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 38 38 157 376 687 890 1039 997 791 479 173 45 5710
40 S 38 76 233 609 1296 2186 3226 4222 5014 5492 5665 5710 5710
45 M 15 14 84 249 533 740 884 842 641 333 91 17 4443
45 S 15 29 113 362 895 1635 2519 3361 4002 4335 4427 4443 4443
50 M 5 4 39 147 384 590 729 687 492 205 41 5 3328
50 S 5 9 48 195 579 1169 1898 2585 3077 3283 3323 3328 3328
55 M 1 1 15 76 247 441 574 532 348 108 13 1 2358
55 S 1 2 17 93 340 782 1356 1888 2236 2344 2357 2358 2358
60 M 0 0 4 32 135 296 419 377 218 45 2 0 1530
60 S 0 0 5 37 172 468 888 1265 1483 1528 1530 1530 1530
Corn Growing Degree Days
50 M 26 30 114 243 435 577 688 657 510 304 109 28 3721
50 S 26 56 170 413 848 1425 2113 2770 3280 3584 3694 3721 3721
Derived form the 1894-1968 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