MC MILLIN RESERVOIR, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(455224) MC MILLIN RESERVOIR
From Year=1941 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 57 75 134 242 425 554 712 719 555 335 132 63 4002
40 S 57 132 266 508 933 1487 2199 2917 3473 3807 3939 4002 4002
45 M 14 19 43 115 272 404 557 564 405 189 48 16 2646
45 S 14 33 76 191 464 868 1424 1988 2393 2583 2630 2646 2646
50 M 2 2 8 39 139 255 402 409 258 78 9 2 1604
50 S 2 4 13 52 191 446 848 1257 1514 1593 1602 1604 1604
55 M 0 0 1 9 55 124 248 255 125 20 1 0 839
55 S 0 0 1 11 65 189 438 692 818 838 839 839 839
60 M 0 0 0 1 16 45 115 117 41 3 0 0 338
60 S 0 0 0 1 17 62 177 294 335 338 338 338 338
Corn Growing Degree Days
50 M 13 26 61 122 224 298 418 426 312 162 41 13 2116
50 S 13 39 99 222 446 744 1162 1588 1900 2062 2103 2116 2116
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