WATERTOWN RGNL AP, SOUTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(398932) WATERTOWN FAA AP
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 1 30 181 489 761 962 897 576 255 31 1 4185
40 S 0 1 32 213 702 1463 2425 3322 3898 4153 4184 4185 4185
45 M 0 0 12 102 347 611 807 742 432 153 10 0 3217
45 S 0 0 13 115 461 1072 1880 2622 3054 3207 3217 3217 3217
50 M 0 0 4 51 222 463 652 587 299 79 2 0 2360
50 S 0 0 4 55 277 740 1393 1980 2279 2358 2360 2360 2360
55 M 0 0 1 22 125 321 498 434 184 33 0 0 1618
55 S 0 0 1 23 147 468 966 1400 1584 1617 1618 1618 1618
60 M 0 0 0 7 60 195 346 288 99 11 0 0 1005
60 S 0 0 0 7 67 261 607 895 995 1005 1005 1005 1005
Corn Growing Degree Days
50 M 0 2 26 126 298 475 628 579 356 166 27 1 2684
50 S 0 2 28 154 452 927 1555 2134 2490 2655 2683 2684 2684
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