CHULA VISTA, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(041758) CHULA VISTA
From Year=1918 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 434 427 512 563 671 721 862 905 838 736 562 458 7688
40 S 434 861 1372 1936 2607 3327 4189 5095 5932 6668 7230 7688 7688
45 M 280 286 357 413 516 571 707 750 688 581 412 303 5863
45 S 280 566 923 1336 1852 2423 3130 3880 4567 5148 5560 5863 5863
50 M 139 151 203 264 361 421 552 595 538 426 263 156 4068
50 S 139 290 493 757 1118 1539 2090 2686 3223 3649 3912 4068 4068
55 M 45 53 76 123 206 271 397 440 388 271 126 49 2445
55 S 45 98 174 297 504 774 1171 1612 1999 2271 2397 2445 2445
60 M 9 11 16 31 70 124 242 285 238 127 38 7 1200
60 S 9 21 36 68 138 262 503 789 1027 1154 1192 1200 1200
Corn Growing Degree Days
50 M 227 214 248 282 363 421 551 594 535 429 307 241 4412
50 S 227 441 689 971 1334 1755 2306 2901 3435 3865 4172 4412 4412
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