JAMESTOWN MUNI AP, NORTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(324413) JAMESTOWN FAA AIRPORT
From Year=1948 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 18 159 470 737 936 880 528 214 22 0 3965
40 S 0 1 19 177 647 1384 2320 3200 3728 3943 3965 3965 3965
45 M 0 0 6 86 329 587 781 725 385 120 7 0 3025
45 S 0 0 6 92 421 1008 1789 2514 2899 3019 3025 3025 3025
50 M 0 0 2 42 207 438 626 570 255 58 1 0 2199
50 S 0 0 2 43 250 688 1314 1885 2140 2198 2199 2199 2199
55 M 0 0 1 18 113 295 471 417 149 24 0 0 1487
55 S 0 0 1 19 131 427 898 1315 1463 1487 1487 1487 1487
60 M 0 0 0 6 51 171 319 271 75 7 0 0 901
60 S 0 0 0 7 58 229 548 819 894 901 901 901 901
Corn Growing Degree Days
50 M 0 1 16 114 289 452 605 558 322 143 20 1 2523
50 S 0 1 18 132 421 873 1478 2036 2358 2502 2522 2523 2523
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