UNIONVILLE, MARYLAND

Period of Record General Climate Summary - Growing Degree Days

From Year=1940 To Year=1996
Station:(189030) UNIONVILLE
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 24 32 133 348 655 893 1054 992 753 440 166 41 5532
40 S 24 56 189 537 1192 2085 3140 4132 4885 5325 5491 5532 5532
45 M 8 13 69 222 501 743 899 837 604 296 88 16 4296
45 S 8 21 90 312 813 1555 2455 3292 3896 4192 4280 4296 4296
50 M 3 4 30 125 351 593 744 682 456 175 39 5 3208
50 S 3 6 37 162 513 1106 1850 2533 2989 3163 3202 3208 3208
55 M 1 1 11 62 219 444 589 527 315 88 14 1 2271
55 S 1 1 13 74 293 736 1326 1853 2168 2256 2270 2271 2271
60 M 0 0 4 25 115 298 434 374 191 34 4 0 1478
60 S 0 0 4 29 143 441 876 1249 1440 1474 1478 1478 1478
Corn Growing Degree Days
50 M 17 25 100 232 416 586 710 665 489 283 109 27 3662
50 S 17 42 142 374 791 1377 2087 2753 3242 3525 3634 3662 3662
Derived form the 1940-1996 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