DAVIS 2 WSW EXP FARM, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(042294) DAVIS 1 WSW
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 181 286 428 554 768 930 1076 1036 914 717 392 193 7475
40 S 181 467 894 1448 2216 3146 4222 5258 6173 6890 7282 7475 7475
45 M 73 155 275 404 613 780 921 881 764 562 246 81 5756
45 S 73 228 503 907 1520 2300 3221 4102 4867 5429 5675 5756 5756
50 M 19 59 142 259 459 630 766 726 614 408 123 22 4228
50 S 19 78 220 479 938 1568 2334 3060 3674 4082 4205 4228 4228
55 M 3 14 52 135 307 480 611 571 464 258 45 4 2946
55 S 3 18 70 205 513 993 1604 2175 2639 2898 2942 2946 2946
60 M 0 3 13 54 173 332 456 416 316 130 10 1 1905
60 S 0 4 16 70 243 575 1032 1448 1764 1894 1904 1905 1905
Corn Growing Degree Days
50 M 81 150 248 340 476 566 637 617 560 453 236 93 4457
50 S 81 232 480 820 1296 1862 2499 3116 3675 4128 4364 4457 4457
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