UKIAH, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(049122) UKIAH
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 197 261 366 470 655 820 1027 999 839 636 348 200 6817
40 S 197 458 824 1293 1948 2768 3795 4794 5633 6269 6617 6817 6817
45 M 82 137 220 321 500 670 872 844 689 481 207 84 5106
45 S 82 219 439 760 1260 1930 2802 3645 4334 4816 5022 5106 5106
50 M 19 48 103 185 346 520 717 689 539 329 92 20 3607
50 S 19 67 170 355 701 1222 1939 2627 3166 3495 3587 3607 3607
55 M 2 9 34 84 204 371 562 534 390 188 26 2 2404
55 S 2 11 44 128 332 704 1265 1799 2189 2377 2402 2404 2404
60 M 0 1 6 27 98 229 407 379 246 81 4 0 1479
60 S 0 1 7 34 132 362 769 1147 1394 1475 1479 1479 1479
Corn Growing Degree Days
50 M 111 153 228 300 408 498 606 591 511 412 216 110 4144
50 S 111 264 492 792 1200 1698 2304 2895 3406 3818 4034 4144 4144
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