HEALDSBURG, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(043875) HEALDSBURG
From Year=1931 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 246 327 447 546 727 853 955 942 861 707 427 261 7300
40 S 246 573 1020 1566 2293 3147 4102 5044 5905 6612 7039 7300 7300
45 M 116 192 294 396 572 703 800 787 711 552 278 127 5528
45 S 116 307 601 997 1569 2273 3073 3860 4571 5123 5401 5528 5528
50 M 35 80 154 250 417 553 645 632 561 398 144 40 3910
50 S 35 115 269 519 936 1490 2135 2767 3328 3725 3869 3910 3910
55 M 5 19 55 124 266 403 490 477 411 247 52 6 2556
55 S 5 24 79 204 469 873 1363 1840 2251 2498 2550 2556 2556
60 M 1 2 12 43 134 256 335 322 262 118 12 0 1498
60 S 1 2 14 57 191 447 783 1105 1367 1486 1498 1498 1498
Corn Growing Degree Days
50 M 124 178 259 333 441 521 582 575 526 434 249 132 4353
50 S 124 303 562 894 1335 1856 2438 3013 3538 3973 4222 4353 4353
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 Jul 28, 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