WEBSTER, SOUTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(399004) WEBSTER WATER DEPT
From Year=1893 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 0 2 31 191 514 783 982 924 582 249 31 1 4290
40 S 0 2 33 224 737 1520 2503 3426 4009 4258 4289 4290 4290
45 M 0 0 12 109 369 633 827 769 436 148 11 0 3315
45 S 0 0 13 122 491 1124 1951 2720 3157 3304 3315 3315 3315
50 M 0 0 4 55 240 484 672 614 301 76 3 0 2450
50 S 0 0 4 59 300 784 1456 2070 2371 2447 2450 2450 2450
55 M 0 0 1 24 136 339 517 459 186 32 0 0 1696
55 S 0 0 1 25 161 500 1018 1477 1663 1695 1696 1696 1696
60 M 0 0 0 8 65 207 365 310 100 11 0 0 1066
60 S 0 0 0 8 73 280 645 955 1055 1066 1066 1066 1066
Corn Growing Degree Days
50 M 0 2 24 127 311 491 646 598 355 156 24 1 2735
50 S 0 2 26 153 464 955 1601 2200 2554 2710 2734 2735 2735
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 Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu