CHEWELAH, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(451395) CHEWELAH
From Year=1925 To Year=2012
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 6 56 218 458 630 833 796 521 211 23 3 3757
40 S 1 7 63 281 739 1370 2203 2999 3520 3731 3754 3757 3757
45 M 0 1 13 107 307 481 678 641 374 101 5 0 2707
45 S 0 1 13 120 428 908 1586 2227 2601 2703 2707 2707 2707
50 M 0 0 1 41 177 332 523 486 237 37 1 0 1835
50 S 0 0 1 42 219 552 1075 1561 1798 1835 1835 1835 1835
55 M 0 0 0 12 83 197 370 333 125 9 0 0 1129
55 S 0 0 0 12 95 292 661 995 1119 1128 1129 1129 1129
60 M 0 0 0 2 30 92 226 192 49 1 0 0 593
60 S 0 0 0 2 32 124 350 543 592 593 593 593 593
Corn Growing Degree Days
50 M 0 4 52 168 311 404 529 521 384 181 11 1 2566
50 S 0 5 57 225 536 940 1469 1990 2373 2554 2565 2566 2566
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