PITKIN, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(056513) PITKIN
From Year=1909 To Year=1986
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 0 0 5 93 272 465 415 220 46 0 0 1516
40 S 0 0 0 5 98 370 836 1250 1470 1516 1516 1516 1516
45 M 0 0 0 0 22 137 310 261 93 8 0 0 830
45 S 0 0 0 0 22 159 469 730 822 830 830 830 830
50 M 0 0 0 0 1 43 157 116 17 1 0 0 334
50 S 0 0 0 0 1 44 201 317 333 334 334 334 334
55 M 0 0 0 0 0 4 35 23 1 0 0 0 63
55 S 0 0 0 0 0 4 39 62 63 63 63 63 63
60 M 0 0 0 0 0 0 1 1 0 0 0 0 2
60 S 0 0 0 0 0 0 1 2 2 2 2 2 2
Corn Growing Degree Days
50 M 0 0 3 27 137 270 365 325 231 109 10 0 1477
50 S 0 0 3 30 167 437 802 1127 1358 1467 1477 1477 1477
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