ALTURAS RANGER STATION, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(040161) ALTURAS RANGER STATION
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 7 18 64 171 365 572 814 757 519 254 54 10 3605
40 S 7 25 89 259 625 1197 2011 2768 3287 3542 3595 3605 3605
45 M 1 2 18 79 229 424 659 602 373 136 14 1 2538
45 S 1 3 21 100 329 754 1413 2015 2387 2524 2537 2538 2538
50 M 0 0 2 25 120 283 504 448 236 55 2 0 1675
50 S 0 0 2 28 148 431 935 1383 1619 1673 1675 1675 1675
55 M 0 0 0 4 49 161 352 297 120 15 0 0 997
55 S 0 0 0 5 53 214 565 862 982 997 997 997 997
60 M 0 0 0 0 13 71 207 159 41 2 0 0 493
60 S 0 0 0 0 13 84 291 450 491 493 493 493 493
Corn Growing Degree Days
50 M 12 27 83 169 287 401 538 527 423 270 83 17 2836
50 S 12 38 122 291 578 979 1517 2043 2466 2736 2819 2836 2836
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