DAVIS 1 WSW, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(042294) DAVIS 1 WSW
From Year=1917 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 170 275 417 548 770 935 1077 1037 916 720 384 187 7434
40 S 170 445 861 1409 2179 3114 4191 5228 6143 6863 7247 7434 7434
45 M 65 144 265 398 615 785 922 882 766 565 239 76 5720
45 S 65 209 473 872 1486 2272 3193 4075 4841 5406 5644 5720 5720
50 M 15 50 132 254 460 636 767 727 616 411 116 18 4201
50 S 15 65 197 452 911 1547 2314 3040 3656 4067 4182 4201 4201
55 M 2 8 46 132 309 486 612 572 466 261 39 2 2933
55 S 2 10 56 188 496 982 1593 2165 2631 2892 2931 2933 2933
60 M 0 0 9 51 175 338 457 417 317 133 8 0 1905
60 S 0 0 10 61 236 574 1030 1447 1764 1897 1905 1905 1905
Corn Growing Degree Days
50 M 74 141 239 337 476 568 635 616 560 452 228 87 4412
50 S 74 216 454 791 1267 1835 2470 3086 3645 4097 4325 4412 4412
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