MOUNT DIABLO JUNCTION, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(045915) MOUNT DIABLO JUNCTION
From Year=1952 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 229 250 308 411 585 771 1030 1017 898 709 394 256 6859
40 S 229 479 787 1198 1784 2555 3585 4602 5500 6209 6603 6859 6859
45 M 110 133 174 271 431 621 875 862 748 554 254 134 5167
45 S 110 243 417 688 1119 1741 2615 3477 4225 4779 5033 5167 5167
50 M 41 55 81 155 287 472 720 707 598 402 139 54 3712
50 S 41 96 178 333 620 1092 1812 2519 3117 3519 3659 3712 3712
55 M 11 18 31 77 171 332 565 552 449 264 64 16 2549
55 S 11 29 59 136 307 639 1204 1756 2206 2469 2534 2549 2549
60 M 1 3 8 32 93 211 415 401 309 152 23 3 1651
60 S 1 5 13 45 138 349 764 1165 1474 1625 1649 1651 1651
Corn Growing Degree Days
50 M 93 110 151 230 350 480 670 658 576 426 196 107 4049
50 S 93 204 355 585 936 1415 2086 2743 3319 3745 3941 4049 4049
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