MC NARY DAM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(455231) MC NARY DAM
From Year=1954 To Year=2008
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 35 66 198 386 642 834 1086 1061 766 444 141 45 5704
40 S 35 101 299 685 1327 2161 3247 4308 5074 5517 5658 5704 5704
45 M 8 17 80 239 487 684 931 906 616 293 55 12 4327
45 S 8 25 105 343 830 1514 2446 3352 3967 4260 4316 4327 4327
50 M 1 3 18 113 333 534 776 751 466 159 14 2 3170
50 S 1 3 22 135 468 1002 1778 2529 2995 3154 3168 3170 3170
55 M 0 0 2 39 194 385 621 596 318 66 3 0 2225
55 S 0 0 2 42 236 621 1242 1838 2156 2222 2225 2225 2225
60 M 0 0 0 9 92 242 466 441 183 19 0 0 1454
60 S 0 0 0 9 101 343 810 1251 1434 1454 1454 1454 1454
Corn Growing Degree Days
50 M 11 28 104 213 372 517 697 688 474 243 51 14 3411
50 S 11 39 143 356 728 1245 1942 2630 3104 3347 3398 3411 3411
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