ALTURAS RANGER STATION, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(040161) ALTURAS RANGER STATION
From Year=1931 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 8 17 62 166 367 570 805 752 520 254 53 10 3584
40 S 8 25 87 253 620 1190 1995 2747 3267 3521 3574 3584 3584
45 M 1 3 17 77 231 422 650 597 374 137 14 1 2524
45 S 1 3 21 98 329 752 1402 1999 2372 2509 2523 2524 2524
50 M 0 0 2 25 123 282 496 442 237 56 2 0 1665
50 S 0 0 3 28 150 432 928 1370 1607 1663 1665 1665 1665
55 M 0 0 0 4 50 160 343 291 122 15 0 0 987
55 S 0 0 0 5 55 215 558 850 972 987 987 987 987
60 M 0 0 0 0 13 72 200 154 43 2 0 0 484
60 S 0 0 0 0 13 85 285 439 482 484 484 484 484
Corn Growing Degree Days
50 M 13 27 80 164 288 398 536 524 423 268 80 18 2818
50 S 13 40 120 283 571 968 1504 2028 2451 2719 2800 2818 2818
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