TRINITY RIVER HATCHERY, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(049026) TRINITY RIVER HATCHERY
From Year=1974 To Year=2005
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 54 117 235 350 581 780 1005 966 764 511 175 46 5585
40 S 54 171 406 756 1337 2117 3122 4088 4852 5363 5539 5585 5585
45 M 8 38 116 217 427 630 850 811 614 359 74 8 4152
45 S 8 47 162 379 807 1437 2287 3098 3712 4070 4144 4152 4152
50 M 0 7 42 113 284 481 695 656 464 218 20 1 2982
50 S 0 8 50 163 447 928 1623 2279 2743 2961 2981 2982 2982
55 M 0 0 9 44 162 335 540 501 318 104 2 0 2018
55 S 0 0 10 54 216 551 1092 1593 1911 2015 2018 2018 2018
60 M 0 0 1 10 76 204 387 348 185 36 0 0 1247
60 S 0 0 1 11 87 291 678 1026 1211 1247 1247 1247 1247
Corn Growing Degree Days
50 M 22 77 161 240 378 484 593 567 486 366 97 15 3487
50 S 22 99 260 500 878 1362 1956 2523 3009 3375 3472 3487 3487
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 Apr 5, 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