UKIAH, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(049122) UKIAH
From Year=1906 To Year=2005
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 200 267 377 478 663 825 1034 1006 850 647 353 204 6905
40 S 200 467 845 1323 1986 2812 3845 4852 5701 6348 6701 6905 6905
45 M 85 141 229 330 508 675 879 851 700 492 210 86 5187
45 S 85 226 455 785 1293 1968 2847 3698 4398 4890 5100 5187 5187
50 M 20 50 109 192 354 525 724 696 550 339 94 21 3676
50 S 20 70 179 372 726 1252 1975 2672 3221 3561 3655 3676 3676
55 M 2 10 36 88 211 376 569 541 400 197 27 2 2460
55 S 2 12 48 136 347 723 1292 1833 2233 2431 2458 2460 2460
60 M 0 1 7 29 103 234 414 386 255 87 4 0 1520
60 S 0 1 8 36 139 373 786 1173 1428 1515 1520 1520 1520
Corn Growing Degree Days
50 M 112 158 238 306 414 500 608 593 517 420 221 113 4200
50 S 112 270 508 813 1227 1727 2336 2929 3446 3866 4087 4200 4200
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 Apr 5, 2006
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