SILVERTON, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(357823) SILVERTON
From Year=1962 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 85 120 208 299 489 635 817 830 668 421 181 83 4837
40 S 85 205 413 712 1201 1835 2653 3483 4151 4572 4754 4837 4837
45 M 27 41 88 161 335 485 662 675 518 270 79 26 3367
45 S 27 68 156 317 652 1137 1799 2474 2992 3263 3341 3367 3367
50 M 5 8 25 65 192 335 507 520 369 139 20 5 2190
50 S 5 13 37 103 295 629 1137 1657 2026 2165 2185 2190 2190
55 M 0 1 3 21 90 193 353 365 224 52 3 0 1304
55 S 0 1 4 24 114 307 660 1025 1249 1302 1304 1304 1304
60 M 0 0 0 4 35 89 205 215 107 13 0 0 668
60 S 0 0 0 4 39 128 333 548 655 668 668 668 668
Corn Growing Degree Days
50 M 19 42 88 141 256 354 499 511 388 211 57 18 2586
50 S 19 62 150 291 548 901 1400 1911 2300 2511 2568 2586 2586
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