FOLSOM DAM, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(043113) FOLSOM DAM
From Year=1955 To Year=1993
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 191 314 438 563 785 970 1159 1133 982 792 432 218 7977
40 S 191 505 942 1505 2291 3261 4420 5553 6535 7327 7759 7977 7977
45 M 81 181 285 413 630 820 1004 978 832 637 286 102 6250
45 S 81 262 547 960 1591 2411 3416 4393 5225 5862 6148 6250 6250
50 M 22 75 149 269 476 670 849 823 682 483 157 30 4685
50 S 22 98 247 516 992 1662 2511 3334 4016 4499 4655 4685 4685
55 M 2 19 55 146 324 521 694 668 532 333 66 3 3363
55 S 2 22 76 222 547 1067 1761 2429 2961 3294 3360 3363 3363
60 M 0 2 12 62 189 373 539 513 383 198 18 0 2289
60 S 0 2 14 76 265 637 1177 1689 2072 2270 2289 2289 2289
Corn Growing Degree Days
50 M 76 149 222 322 477 600 709 699 615 484 219 92 4664
50 S 76 225 447 769 1246 1846 2555 3254 3869 4353 4572 4664 4664
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