HEALDSBURG, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(043875) HEALDSBURG
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 238 320 441 538 712 846 942 926 843 697 424 251 7176
40 S 238 558 999 1537 2248 3095 4037 4963 5805 6502 6925 7176 7176
45 M 109 186 287 389 557 696 787 771 693 542 275 119 5410
45 S 109 295 582 970 1527 2223 3010 3781 4474 5016 5291 5410 5410
50 M 31 77 149 242 402 546 632 616 543 387 141 37 3803
50 S 31 108 257 499 901 1448 2080 2696 3238 3625 3767 3803 3803
55 M 4 18 54 118 251 397 477 461 393 237 51 6 2467
55 S 4 23 77 195 446 842 1319 1780 2173 2410 2461 2467 2467
60 M 0 2 13 40 123 250 322 306 246 111 12 0 1426
60 S 0 2 15 55 179 428 751 1057 1302 1414 1425 1426 1426
Corn Growing Degree Days
50 M 122 179 262 332 437 519 575 567 518 432 252 132 4326
50 S 122 300 562 895 1331 1850 2425 2992 3510 3942 4194 4326 4326
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