PALOMAR MTN OBSVTRY, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(046657) PALOMAR MOUNTAIN OBSERV
From Year=1901 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 152 146 217 340 548 778 1018 1018 853 587 301 176 6133
40 S 152 298 514 855 1403 2181 3199 4216 5070 5657 5958 6133 6133
45 M 70 71 119 221 403 628 863 863 704 438 183 87 4649
45 S 70 141 260 481 884 1512 2375 3238 3941 4380 4562 4649 4649
50 M 23 26 52 126 271 482 708 708 555 300 92 32 3374
50 S 23 49 101 226 498 980 1688 2395 2950 3250 3342 3374 3374
55 M 5 6 15 58 159 342 553 553 409 180 34 7 2320
55 S 5 10 26 83 242 584 1137 1690 2099 2279 2313 2320 2320
60 M 1 0 2 19 75 215 399 399 270 87 8 1 1476
60 S 1 1 3 23 98 313 712 1111 1381 1468 1476 1476 1476
Corn Growing Degree Days
50 M 71 73 116 196 328 501 691 694 559 342 154 83 3808
50 S 71 144 261 457 785 1285 1976 2670 3229 3571 3725 3808 3808
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