PALOMAR MOUNTAIN OBSERV, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(046657) PALOMAR MOUNTAIN OBSERV
From Year=1948 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 145 151 215 334 536 784 1024 1017 851 595 300 169 6121
40 S 145 296 511 845 1381 2165 3189 4206 5057 5652 5952 6121 6121
45 M 65 75 119 215 393 635 869 862 701 445 182 81 4642
45 S 65 140 259 474 867 1501 2370 3233 3934 4379 4561 4642 4642
50 M 21 28 53 121 263 488 714 708 553 306 92 28 3375
50 S 21 49 102 224 487 975 1689 2396 2949 3255 3347 3375 3375
55 M 4 6 16 54 153 348 559 553 407 185 34 5 2325
55 S 4 11 27 81 234 582 1141 1694 2101 2286 2320 2325 2325
60 M 1 1 3 18 72 221 405 399 269 91 8 1 1486
60 S 1 1 4 21 93 314 719 1118 1387 1478 1485 1486 1486
Corn Growing Degree Days
50 M 69 77 118 194 322 507 693 692 557 349 155 81 3814
50 S 69 146 264 458 781 1288 1981 2673 3230 3579 3734 3814 3814
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 Jul 28, 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