MOUNT SHASTA, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(045983) MOUNT SHASTA
From Year=1948 To Year=2010
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 18 42 96 208 428 630 857 811 617 348 90 20 4166
40 S 18 60 156 364 792 1422 2279 3090 3707 4056 4145 4166 4166
45 M 2 9 33 108 285 481 702 656 468 212 31 3 2989
45 S 2 10 43 151 436 917 1620 2275 2743 2956 2986 2989 2989
50 M 0 1 7 43 165 337 548 501 323 105 6 0 2036
50 S 0 1 8 51 216 552 1100 1601 1924 2030 2036 2036 2036
55 M 0 0 1 11 78 206 394 348 194 39 1 0 1272
55 S 0 0 1 11 90 296 690 1038 1232 1271 1272 1272 1272
60 M 0 0 0 1 28 104 246 205 91 10 0 0 684
60 S 0 0 0 1 29 132 378 583 674 684 684 684 684
Corn Growing Degree Days
50 M 14 36 78 153 277 397 541 514 405 238 63 16 2732
50 S 14 50 128 281 558 955 1496 2010 2415 2653 2716 2732 2732
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