NORTHPORT, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(455946) NORTHPORT
From Year=1920 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 1 3 66 273 536 710 925 887 593 252 26 2 4273
40 S 1 3 69 342 879 1589 2514 3401 3994 4245 4272 4273 4273
45 M 0 0 14 144 383 560 770 732 443 129 4 0 3180
45 S 0 0 14 159 541 1101 1871 2603 3046 3175 3180 3180 3180
50 M 0 0 2 58 237 410 615 577 299 49 0 0 2248
50 S 0 0 2 59 297 707 1322 1899 2198 2247 2248 2248 2248
55 M 0 0 0 17 120 264 460 423 171 12 0 0 1467
55 S 0 0 0 17 137 401 862 1284 1456 1467 1467 1467 1467
60 M 0 0 0 3 46 138 308 273 77 1 0 0 846
60 S 0 0 0 3 49 187 495 768 845 846 846 846 846
Corn Growing Degree Days
50 M 0 2 58 202 354 442 561 543 390 160 7 0 2719
50 S 0 2 60 262 616 1058 1619 2162 2551 2712 2719 2719 2719
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