HAYFORK, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(043859) HAYFORK RANGER STN
From Year=1914 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 43 81 192 295 492 670 901 867 643 409 167 47 4805
40 S 43 123 315 610 1102 1772 2673 3539 4182 4591 4758 4805 4805
45 M 7 22 82 167 341 520 746 712 493 259 63 11 3423
45 S 7 29 111 279 620 1140 1885 2597 3090 3349 3412 3423 3423
50 M 1 3 22 73 204 373 591 557 345 131 14 2 2314
50 S 1 4 26 98 302 675 1266 1823 2168 2299 2312 2314 2314
55 M 0 0 2 19 100 234 436 402 209 47 1 0 1451
55 S 0 0 3 21 121 355 791 1193 1402 1450 1451 1451 1451
60 M 0 0 0 3 36 118 283 251 101 11 0 0 803
60 S 0 0 0 3 39 157 440 691 791 803 803 803 803
Corn Growing Degree Days
50 M 42 91 186 257 375 462 557 548 472 375 165 42 3570
50 S 42 133 319 575 950 1412 1969 2517 2988 3363 3528 3570 3570
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