MT SAN JACINTO WS, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(045978) MOUNT SAN JACINTO WSP
From Year=1969 To Year=1978
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 11 5 29 41 226 472 660 593 435 148 48 9 2675
40 S 11 16 45 85 311 783 1443 2036 2470 2618 2666 2675 2675
45 M 2 0 4 7 110 325 505 438 285 59 12 1 1747
45 S 2 2 6 12 123 448 952 1391 1676 1734 1746 1747 1747
50 M 0 0 0 0 31 189 350 283 145 14 1 0 1013
50 S 0 0 0 1 32 221 570 853 998 1013 1013 1013 1013
55 M 0 0 0 0 4 87 197 138 51 2 0 0 479
55 S 0 0 0 0 4 91 288 426 477 479 479 479 479
60 M 0 0 0 0 0 30 74 38 8 0 0 0 150
60 S 0 0 0 0 0 30 103 142 150 150 150 150 150
Corn Growing Degree Days
50 M 13 8 30 46 171 310 402 359 262 101 42 10 1754
50 S 13 21 51 97 268 578 980 1340 1601 1702 1744 1754 1754
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