SAN GREGORIO 2 SE, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047807) SAN GREGORIO 2 SE
From Year=1954 To Year=2005
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 291 299 343 366 458 526 609 628 601 526 381 298 5326
40 S 291 590 933 1299 1757 2283 2892 3521 4122 4648 5029 5326 5326
45 M 150 163 190 217 303 376 454 473 451 371 234 155 3538
45 S 150 314 504 721 1024 1400 1854 2327 2778 3149 3383 3538 3538
50 M 54 60 68 86 151 227 299 318 301 218 106 54 1941
50 S 54 114 182 267 418 645 944 1262 1563 1781 1887 1941 1941
55 M 10 12 12 19 40 89 146 165 154 89 29 10 773
55 S 10 22 33 52 91 181 327 492 645 734 763 773 773
60 M 1 1 1 4 5 17 33 41 43 23 4 1 174
60 S 1 2 3 6 12 29 62 103 145 169 173 174 174
Corn Growing Degree Days
50 M 141 143 165 184 222 269 325 344 340 297 206 149 2786
50 S 141 284 450 634 856 1125 1449 1793 2133 2430 2636 2786 2786
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 Apr 5, 2006
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