VERNONIA, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(358879) VERNONIA
From Year=1893 To Year=1967
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 42 61 112 238 403 513 673 677 568 341 113 54 3795
40 S 42 103 215 453 856 1369 2042 2719 3287 3628 3741 3795 3795
45 M 7 13 37 114 252 363 518 522 418 198 36 10 2488
45 S 7 20 57 171 423 786 1304 1826 2244 2442 2477 2488 2488
50 M 0 1 10 39 126 217 363 367 271 86 5 1 1486
50 S 0 2 12 51 176 393 756 1123 1394 1480 1485 1486 1486
55 M 0 0 2 11 48 98 212 216 140 24 0 0 751
55 S 0 0 2 13 61 159 370 587 727 751 751 751 751
60 M 0 0 0 3 15 34 93 91 53 3 0 0 292
60 S 0 0 0 3 18 52 145 236 289 292 292 292 292
Corn Growing Degree Days
50 M 11 28 75 156 253 309 418 421 360 205 47 11 2294
50 S 11 39 114 271 524 833 1251 1672 2031 2236 2283 2294 2294
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