RICHLAND, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(457015) RICHLAND
From Year=1944 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 44 79 217 408 674 853 1088 1052 770 434 135 45 5798
40 S 44 122 339 748 1421 2274 3362 4414 5185 5618 5753 5798 5798
45 M 13 26 98 261 519 703 933 897 620 286 57 14 4427
45 S 13 39 137 398 917 1620 2552 3450 4070 4356 4413 4427 4427
50 M 3 6 29 134 365 553 778 742 471 156 17 3 3256
50 S 3 9 38 172 537 1090 1867 2610 3080 3237 3254 3256 3256
55 M 0 1 6 53 223 404 623 587 324 66 3 0 2289
55 S 0 1 7 59 282 685 1308 1895 2220 2285 2289 2289 2289
60 M 0 0 1 15 112 259 468 433 191 20 0 0 1498
60 S 0 0 1 16 128 387 855 1287 1478 1498 1498 1498 1498
Corn Growing Degree Days
50 M 18 42 133 248 407 530 685 666 482 264 62 18 3556
50 S 18 60 193 441 848 1378 2063 2730 3211 3476 3538 3556 3556
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