MT VERNON 3 WNW, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(455678) MOUNT VERNON 3 WNW
From Year=1956 To Year=2005
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 85 100 162 264 442 562 679 693 533 332 154 88 4094
40 S 85 184 347 610 1053 1614 2294 2987 3520 3852 4006 4094 4094
45 M 27 30 54 122 288 412 524 538 383 185 61 27 2651
45 S 27 57 111 233 521 933 1457 1995 2378 2563 2624 2651 2651
50 M 5 5 10 33 142 262 369 383 235 72 14 4 1533
50 S 5 10 19 52 194 456 826 1208 1444 1516 1530 1533 1533
55 M 0 0 1 4 44 119 215 228 102 16 2 0 732
55 S 0 1 1 6 50 170 385 613 714 730 732 732 732
60 M 0 0 0 0 9 29 79 88 23 1 0 0 230
60 S 0 0 0 0 9 39 117 206 228 230 230 230 230
Corn Growing Degree Days
50 M 17 29 58 117 219 294 388 403 293 152 40 16 2027
50 S 17 46 104 222 441 735 1123 1526 1819 1971 2011 2027 2027
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