PERRIS, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(046816) PERRIS
From Year=1961 To Year=1973
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 311 361 422 537 730 855 1149 1172 961 767 488 303 8055
40 S 311 672 1094 1631 2361 3216 4364 5537 6497 7265 7752 8055 8055
45 M 172 224 270 388 575 705 994 1017 811 612 339 167 6274
45 S 172 396 666 1054 1629 2334 3328 4345 5156 5768 6107 6274 6274
50 M 72 107 138 248 420 555 839 862 661 459 198 68 4628
50 S 72 179 317 565 985 1540 2379 3241 3902 4361 4559 4628 4628
55 M 22 35 53 134 270 406 684 707 511 309 87 16 3232
55 S 22 57 109 243 513 919 1603 2310 2821 3130 3216 3232 3232
60 M 5 8 12 52 143 263 529 552 361 171 24 1 2120
60 S 5 13 25 77 219 482 1011 1563 1924 2095 2118 2120 2120
Corn Growing Degree Days
50 M 239 255 283 357 447 513 674 692 581 488 329 226 5085
50 S 239 495 777 1134 1581 2094 2769 3461 4042 4530 4859 5085 5085
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