SWAN LAKE, MISSISSIPPI

Period of Record General Climate Summary - Growing Degree Days

From Year=1905 To Year=2000
Station:(228591) SWAN LAKE
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 230 196 344 775 988 1195 1240 -99 -99 743 484 -99 -99
40 S 230 426 769 1544 2532 3726 4966 -99 -99 -99 -99 -99 -99
45 M 136 120 219 625 833 1045 1085 -99 -99 588 341 -99 -99
45 S 136 256 475 1100 1932 2977 4062 -99 -99 -99 -99 -99 -99
50 M 73 58 122 479 678 895 930 -99 -99 433 206 -99 -99
50 S 73 131 253 732 1410 2304 3234 -99 -99 -99 -99 -99 -99
55 M 32 19 57 334 523 745 775 -99 -99 289 102 -99 -99
55 S 32 51 107 441 964 1708 2483 -99 -99 -99 -99 -99 -99
60 M 7 4 23 204 374 595 620 -99 -99 190 40 -99 -99
60 S 7 11 34 237 611 1206 1826 -99 -99 -99 -99 -99 -99
Corn Growing Degree Days
50 M 153 137 192 505 666 806 861 -99 -99 504 295 -99 -99
50 S 153 290 482 986 1652 2457 3318 -99 -99 -99 -99 -99 -99
Derived form the 1905-2000 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