OJAI, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(046399) OJAI
From Year=1905 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 352 366 466 555 687 805 1013 1019 913 756 525 377 7834
40 S 352 718 1185 1740 2426 3231 4244 5263 6176 6932 7457 7834 7834
45 M 207 228 312 405 532 655 858 864 763 601 375 229 6029
45 S 207 435 748 1153 1684 2339 3197 4061 4824 5425 5801 6029 6029
50 M 91 110 170 259 377 505 703 709 613 446 232 105 4320
50 S 91 201 371 630 1007 1511 2214 2924 3537 3983 4215 4320 4320
55 M 26 37 67 130 227 355 548 554 463 294 113 32 2844
55 S 26 63 130 260 487 842 1389 1944 2407 2700 2813 2844 2844
60 M 4 8 17 49 104 210 393 399 314 157 40 5 1699
60 S 4 12 29 78 181 392 784 1184 1498 1655 1694 1699 1699
Corn Growing Degree Days
50 M 259 254 313 356 425 494 617 618 555 479 366 278 5014
50 S 259 512 825 1181 1606 2100 2717 3335 3890 4369 4736 5014 5014
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