NESPELEM 2 S, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(455832) NESPELEM 2 S
From Year=1915 To Year=1991
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 2 6 59 236 472 669 894 860 571 264 24 4 4063
40 S 2 8 67 303 776 1445 2339 3200 3770 4034 4059 4063 4063
45 M 0 1 15 120 321 519 739 705 422 141 4 1 2988
45 S 0 1 16 135 457 976 1715 2421 2843 2984 2988 2988 2988
50 M 0 0 2 47 188 370 584 550 280 57 1 0 2079
50 S 0 0 2 49 237 607 1191 1742 2022 2078 2079 2079 2079
55 M 0 0 0 12 89 229 430 397 158 15 0 0 1330
55 S 0 0 0 12 101 330 760 1156 1314 1330 1330 1330 1330
60 M 0 0 0 2 32 114 281 250 70 2 0 0 752
60 S 0 0 0 2 35 149 430 679 749 752 752 752 752
Corn Growing Degree Days
50 M 0 4 53 181 324 434 561 545 393 203 15 1 2715
50 S 0 4 57 238 563 996 1557 2102 2495 2699 2713 2715 2715
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