REDDING, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047296) REDDING
From Year=1931 To Year=1979
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 208 288 443 607 877 1087 1342 1277 1079 804 435 235 8681
40 S 208 497 939 1546 2423 3510 4852 6128 7208 8012 8447 8681 8681
45 M 99 163 294 457 722 937 1187 1122 929 649 289 115 6964
45 S 99 262 555 1012 1735 2671 3859 4980 5910 6559 6848 6964 6964
50 M 34 67 166 315 568 787 1032 967 779 495 162 42 5413
50 S 34 101 266 581 1149 1935 2967 3934 4714 5209 5371 5413 5413
55 M 8 18 75 191 417 637 877 812 630 347 73 10 4094
55 S 8 27 102 293 710 1346 2224 3035 3665 4012 4085 4094 4094
60 M 1 4 26 97 278 488 722 657 480 214 26 1 2995
60 S 1 5 31 128 406 894 1617 2273 2754 2968 2994 2995 2995
Corn Growing Degree Days
50 M 100 144 243 359 546 690 837 799 683 493 228 107 5227
50 S 100 244 487 846 1391 2081 2918 3717 4400 4893 5120 5227 5227
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