SEATTLE NAVAL AIR STN, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(457468) SEATTLE NAVAL AIR STN
From Year=1945 To Year=1970
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 79 119 169 296 504 632 785 776 631 425 198 115 4731
40 S 79 198 367 663 1168 1800 2585 3361 3992 4418 4616 4731 4731
45 M 20 35 56 152 349 482 630 621 481 272 83 33 3215
45 S 20 55 111 263 612 1094 1725 2345 2827 3099 3182 3215 3215
50 M 1 5 10 48 200 332 475 466 332 133 18 3 2023
50 S 1 6 16 64 264 596 1072 1537 1869 2001 2020 2023 2023
55 M 0 0 0 10 85 186 320 311 186 41 1 0 1140
55 S 0 0 1 10 96 281 602 912 1099 1139 1140 1140 1140
60 M 0 0 0 1 26 71 169 159 71 7 0 0 504
60 S 0 0 0 1 27 98 267 427 498 504 504 504 504
Corn Growing Degree Days
50 M 9 28 52 117 241 336 473 464 340 171 44 14 2289
50 S 9 37 89 206 446 783 1255 1719 2060 2231 2275 2289 2289
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