OMAK 2 NW, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(456123) OMAK 2 NW
From Year=1931 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 1 5 84 298 562 751 969 924 629 277 27 3 4530
40 S 1 7 91 389 951 1702 2671 3594 4223 4500 4528 4530 4530
45 M 0 1 27 168 408 601 814 769 479 156 5 1 3426
45 S 0 1 27 195 603 1203 2017 2786 3265 3420 3425 3426 3426
50 M 0 0 6 75 262 451 659 614 333 69 0 0 2469
50 S 0 0 6 81 343 794 1453 2066 2399 2469 2469 2469 2469
55 M 0 0 1 25 141 304 504 459 200 23 0 0 1656
55 S 0 0 1 25 166 470 974 1433 1633 1656 1656 1656 1656
60 M 0 0 0 5 59 172 351 308 98 6 0 0 999
60 S 0 0 0 5 64 236 587 895 993 999 999 999 999
Corn Growing Degree Days
50 M 1 4 65 204 359 470 611 584 408 187 11 1 2905
50 S 1 4 70 274 633 1103 1714 2298 2706 2893 2904 2905 2905
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