NAPA STATE HOSPITAL, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(046074) NAPA STATE HOSPITAL
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 244 318 423 499 651 766 852 849 801 685 427 261 6775
40 S 244 562 985 1484 2135 2901 3753 4602 5403 6088 6515 6775 6775
45 M 114 183 270 350 496 616 697 694 651 530 279 128 5008
45 S 114 298 568 917 1413 2029 2726 3420 4071 4601 4880 5008 5008
50 M 35 74 135 206 341 466 542 539 501 375 146 42 3403
50 S 35 109 244 450 791 1257 1799 2338 2839 3214 3360 3403 3403
55 M 6 17 46 90 193 317 387 384 351 226 53 7 2076
55 S 6 22 68 158 351 668 1055 1439 1790 2016 2069 2076 2076
60 M 0 2 10 28 81 175 233 229 206 101 12 0 1077
60 S 0 2 12 41 121 296 529 759 964 1066 1077 1077 1077
Corn Growing Degree Days
50 M 123 172 246 303 390 463 525 524 489 421 251 131 4039
50 S 123 295 541 844 1235 1697 2222 2746 3236 3656 3908 4039 4039
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