UMATILLA, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(358734) UMATILLA
From Year=1892 To Year=1965
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 31 58 211 430 677 867 1117 1051 745 421 114 42 5763
40 S 31 89 299 729 1406 2273 3390 4441 5187 5607 5721 5763 5763
45 M 8 15 96 283 522 717 962 896 595 273 43 13 4424
45 S 8 23 119 401 923 1640 2602 3499 4094 4368 4411 4424 4424
50 M 1 2 30 152 368 567 807 741 446 147 11 3 3275
50 S 1 3 33 185 553 1120 1927 2669 3115 3262 3272 3275 3275
55 M 0 0 5 62 223 418 652 586 300 59 1 0 2307
55 S 0 0 6 67 291 708 1360 1947 2247 2306 2307 2307 2307
60 M 0 0 0 19 109 272 497 432 169 15 0 0 1513
60 S 0 0 0 19 128 400 897 1329 1498 1513 1513 1513 1513
Corn Growing Degree Days
50 M 14 34 144 281 421 538 688 651 472 268 59 19 3588
50 S 14 48 192 472 893 1431 2119 2771 3243 3510 3569 3588 3588
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