BOUNDARY DAM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(450844) BOUNDARY DAM
From Year=1965 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 0 0 23 168 398 577 798 795 505 174 17 0 3455
40 S 0 0 24 192 589 1166 1964 2759 3264 3438 3455 3455 3455
45 M 0 0 2 72 249 427 643 640 357 72 3 0 2464
45 S 0 0 2 74 323 750 1393 2033 2390 2461 2464 2464 2464
50 M 0 0 0 24 127 280 488 485 219 22 0 0 1644
50 S 0 0 0 24 150 431 919 1404 1622 1644 1644 1644 1644
55 M 0 0 0 6 52 153 335 332 109 4 0 0 989
55 S 0 0 0 6 57 210 545 876 986 989 989 989 989
60 M 0 0 0 1 17 64 195 192 39 0 0 0 508
60 S 0 0 0 1 18 81 277 469 508 508 508 508 508
Corn Growing Degree Days
50 M 0 0 28 128 239 329 480 490 327 109 3 0 2135
50 S 0 0 28 156 395 725 1205 1695 2022 2131 2135 2135 2135
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