CUYAMACA, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(042239) CUYAMACA
From Year=1899 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 77 90 164 268 450 689 934 910 719 446 204 89 5039
40 S 77 167 330 598 1048 1737 2670 3581 4300 4746 4950 5039 5039
45 M 22 29 75 154 308 540 779 755 569 300 98 28 3656
45 S 22 51 126 280 587 1127 1906 2661 3231 3531 3629 3656 3656
50 M 3 5 24 71 183 394 624 600 421 172 32 4 2533
50 S 3 9 32 103 286 680 1304 1904 2326 2497 2529 2533 2533
55 M 0 0 4 22 87 258 469 446 280 75 6 0 1648
55 S 0 1 5 27 114 371 841 1287 1567 1642 1648 1648 1648
60 M 0 0 0 4 29 141 317 295 156 22 0 0 965
60 S 0 0 0 4 33 175 492 787 943 965 965 965 965
Corn Growing Degree Days
50 M 56 62 108 171 282 436 610 592 462 292 144 69 3284
50 S 56 118 226 397 679 1115 1725 2317 2778 3071 3215 3284 3284
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