SAN LUIS DAM, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047846) SAN LUIS DAM
From Year=1963 To Year=2007
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 198 318 489 604 826 970 1178 1159 1009 801 442 210 8203
40 S 198 516 1005 1609 2435 3404 4583 5741 6750 7551 7993 8203 8203
45 M 85 183 335 454 671 820 1023 1004 859 646 295 93 6467
45 S 85 268 603 1056 1728 2547 3570 4574 5433 6079 6374 6467 6467
50 M 24 75 190 306 516 670 868 849 709 491 165 28 4890
50 S 24 99 289 595 1111 1781 2649 3498 4206 4697 4862 4890 4890
55 M 4 17 79 173 363 520 713 694 559 338 69 5 3533
55 S 4 21 100 273 636 1156 1869 2563 3121 3459 3528 3533 3533
60 M 0 1 22 78 222 371 558 539 409 195 17 0 2414
60 S 0 2 24 101 324 695 1253 1792 2201 2396 2413 2414 2414
Corn Growing Degree Days
50 M 83 152 253 339 505 618 759 753 656 491 226 93 4929
50 S 83 235 488 827 1332 1950 2709 3462 4119 4610 4836 4929 4929
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