LAKE ARROWHEAD, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(044671) LAKE ARROWHEAD
From Year=1941 To Year=2011
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 40 61 126 252 447 663 905 888 714 436 158 52 4741
40 S 40 101 227 479 927 1590 2494 3382 4096 4532 4690 4741 4741
45 M 7 15 48 140 305 514 750 733 564 292 69 11 3448
45 S 7 22 70 210 516 1030 1779 2512 3076 3368 3436 3448 3448
50 M 0 2 11 60 180 369 595 578 416 165 19 1 2396
50 S 0 2 13 73 253 623 1217 1795 2211 2376 2395 2396 2396
55 M 0 0 1 18 83 234 440 423 275 73 2 0 1549
55 S 0 0 1 19 102 336 776 1199 1474 1547 1549 1549 1549
60 M 0 0 0 3 25 122 287 272 150 22 0 0 880
60 S 0 0 0 3 28 149 436 708 858 880 880 880 880
Corn Growing Degree Days
50 M 23 41 90 170 277 412 588 576 444 253 88 29 2989
50 S 23 64 153 324 600 1012 1601 2176 2620 2873 2961 2989 2989
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