COPCO #1 DAM, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(041990) COPCO NO 1 DAM
From Year=1959 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 37 45 80 206 553 595 953 1056 896 464 90 14 4988
40 S 37 82 162 368 921 1516 2469 3525 4421 4884 4974 4988 4988
45 M 13 9 18 108 404 449 798 901 746 318 19 4 3786
45 S 13 22 40 147 551 1000 1799 2699 3445 3763 3782 3786 3786
50 M 4 0 1 54 266 309 643 746 596 196 0 0 2814
50 S 4 4 4 58 324 633 1276 2022 2617 2814 2814 2814 2814
55 M 0 0 0 27 166 188 488 591 446 103 0 0 2009
55 S 0 0 0 28 194 381 870 1460 1906 2009 2009 2009 2009
60 M 0 0 0 11 95 97 335 436 300 48 0 0 1322
60 S 0 0 0 11 106 203 538 974 1274 1322 1322 1322 1322
Corn Growing Degree Days
50 M 34 58 62 164 380 398 588 633 547 305 71 28 3268
50 S 34 92 154 317 698 1096 1684 2317 2864 3170 3240 3268 3268
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