MT HAMILTON, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(045933) MOUNT HAMILTON
From Year=1948 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 152 138 167 256 462 689 961 939 790 561 276 160 5551
40 S 152 290 457 713 1175 1864 2826 3764 4554 5116 5391 5551 5551
45 M 78 68 87 158 326 541 806 784 641 415 167 80 4151
45 S 78 146 233 391 717 1259 2065 2848 3489 3904 4071 4151 4151
50 M 34 28 39 85 211 401 651 629 494 284 89 32 2978
50 S 34 62 101 186 397 799 1450 2079 2573 2857 2946 2978 2978
55 M 12 9 13 40 122 276 498 477 356 175 39 9 2026
55 S 12 20 33 73 195 471 969 1446 1802 1978 2016 2026 2026
60 M 2 2 3 14 61 171 351 333 234 94 12 2 1278
60 S 2 4 7 21 82 252 603 936 1170 1264 1276 1278 1278
Corn Growing Degree Days
50 M 53 50 66 124 252 425 649 629 505 310 116 55 3235
50 S 53 103 169 294 546 971 1620 2249 2753 3063 3180 3235 3235
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