SALEM WSO AIRPORT, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(357500) SALEM WSO AIRPORT
From Year=1892 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 85 110 197 312 494 643 833 832 654 414 180 94 4846
40 S 85 195 391 704 1198 1840 2673 3505 4159 4573 4752 4846 4846
45 M 28 36 80 171 339 493 678 677 504 263 77 30 3375
45 S 28 63 143 314 653 1146 1824 2501 3004 3267 3344 3375 3375
50 M 5 7 20 69 194 343 523 522 354 131 20 6 2195
50 S 5 12 33 101 295 638 1161 1682 2037 2168 2188 2195 2195
55 M 0 1 3 20 85 199 368 367 211 44 3 0 1300
55 S 0 1 4 23 108 307 675 1042 1252 1297 1300 1300 1300
60 M 0 0 0 4 28 85 217 215 94 9 0 0 653
60 S 0 0 0 4 32 117 335 550 644 653 653 653 653
Corn Growing Degree Days
50 M 19 41 95 170 279 373 515 516 395 226 62 20 2710
50 S 19 60 155 326 604 977 1492 2008 2402 2628 2690 2710 2710
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