MERRILL, MISSISSIPPI

Period of Record General Climate Summary - Growing Degree Days

From Year=1905 To Year=1998
Station:(225789) MERRILL
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 265 326 562 761 997 1144 1261 1241 1080 778 486 322 9224
40 S 265 591 1153 1914 2911 4055 5316 6557 7638 8416 8901 9224 9224
45 M 165 217 415 612 842 994 1106 1086 930 624 347 209 7547
45 S 165 382 797 1409 2250 3244 4351 5437 6367 6991 7338 7547 7547
50 M 94 131 283 463 687 844 951 931 780 471 227 126 5987
50 S 94 224 507 970 1657 2501 3452 4383 5164 5634 5861 5987 5987
55 M 48 71 171 320 532 694 796 776 630 326 132 68 4566
55 S 48 119 290 610 1142 1836 2633 3409 4039 4365 4497 4566 4566
60 M 20 33 88 194 379 544 641 621 481 202 64 32 3298
60 S 20 52 140 334 713 1257 1898 2520 3000 3202 3266 3298 3298
Corn Growing Degree Days
50 M 184 229 374 505 664 760 842 829 719 530 338 231 6205
50 S 184 413 787 1292 1957 2717 3559 4388 5106 5636 5974 6205 6205
Derived form the 1905-1998 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