WILLOW CREEK 1 NW, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(049694) WILLOW CREEK 1 NW
From Year=1968 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 115 193 303 412 644 831 1042 1022 826 557 268 108 6321
40 S 115 307 611 1023 1666 2498 3539 4561 5387 5944 6213 6321 6321
45 M 39 81 168 268 489 681 887 867 676 403 136 31 4725
45 S 39 120 288 556 1045 1726 2613 3479 4155 4558 4695 4725 4725
50 M 9 20 67 144 336 531 732 712 526 254 47 5 3384
50 S 9 29 96 240 576 1108 1840 2551 3078 3331 3379 3384 3384
55 M 1 2 14 60 202 383 577 557 377 130 10 0 2315
55 S 1 4 18 78 280 663 1240 1797 2174 2304 2315 2315 2315
60 M 0 0 1 17 100 245 423 402 235 50 1 0 1473
60 S 0 0 1 18 118 363 786 1188 1423 1472 1473 1473 1473
Corn Growing Degree Days
50 M 44 102 186 274 410 504 598 585 506 369 131 31 3740
50 S 44 146 332 606 1016 1520 2118 2703 3209 3578 3709 3740 3740
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