BALTIMORE WSO CITY, MARYLAND

Period of Record General Climate Summary - Growing Degree Days

From Year=1893 To Year=2001
Station:(180470) BALTIMORE WSO CITY
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 61 67 213 467 799 1034 1211 1150 919 602 274 91 6887
40 S 61 129 342 808 1607 2641 3852 5002 5920 6522 6796 6887 6887
45 M 25 29 120 326 644 884 1056 995 769 449 162 39 5498
45 S 25 54 174 500 1144 2028 3084 4079 4847 5296 5459 5498 5498
50 M 9 11 61 204 489 734 901 840 619 304 83 14 4269
50 S 9 19 80 285 774 1508 2409 3249 3868 4172 4255 4269 4269
55 M 3 3 28 113 340 585 746 685 470 180 35 4 3191
55 S 3 6 34 147 487 1072 1818 2502 2972 3152 3187 3191 3191
60 M 1 1 11 55 209 436 591 530 326 89 11 1 2260
60 S 1 1 12 67 276 712 1303 1832 2158 2248 2259 2260 2260
Corn Growing Degree Days
50 M 26 30 105 246 490 706 849 804 608 334 124 36 4358
50 S 26 57 161 407 897 1603 2452 3256 3865 4198 4322 4358 4358
Derived form the 1893-2001 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