WALLA WALLA WB CITY, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(458931) WALLA WALLA WB CITY
From Year=1948 To Year=1987
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 67 101 211 379 629 832 1092 1052 754 438 150 74 5780
40 S 67 167 379 758 1387 2219 3311 4363 5117 5555 5705 5780 5780
45 M 27 40 96 234 475 682 937 897 604 290 67 29 4377
45 S 27 67 163 397 871 1553 2490 3387 3991 4281 4348 4377 4377
50 M 8 11 31 117 323 532 782 742 455 159 20 7 3187
50 S 8 19 50 166 489 1021 1803 2545 3000 3159 3180 3187 3187
55 M 1 2 8 48 189 383 627 587 311 69 4 1 2230
55 S 1 3 11 59 248 631 1257 1845 2155 2224 2228 2230 2230
60 M 0 0 1 15 94 243 472 433 183 22 1 0 1465
60 S 0 0 2 17 111 354 826 1259 1442 1464 1464 1465 1465
Corn Growing Degree Days
50 M 22 37 93 196 356 514 704 684 461 226 54 26 3372
50 S 22 59 152 348 704 1218 1922 2605 3066 3292 3346 3372 3372
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