MT WILSON NO 2, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(046006) MT WILSON NO 2
From Year=1948 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 192 179 224 333 531 768 1008 987 838 619 347 220 6245
40 S 192 372 595 928 1459 2226 3234 4222 5060 5679 6025 6245 6245
45 M 104 99 131 220 393 620 853 832 689 470 226 123 4760
45 S 104 203 334 554 947 1567 2420 3252 3941 4411 4637 4760 4760
50 M 44 45 62 129 267 476 698 678 542 332 129 53 3454
50 S 44 89 151 280 547 1024 1722 2399 2941 3272 3401 3454 3454
55 M 13 14 21 62 160 340 543 523 399 211 58 15 2359
55 S 13 27 48 109 269 609 1152 1675 2074 2285 2343 2359 2359
60 M 2 2 4 22 79 216 389 372 264 113 18 2 1483
60 S 2 4 8 30 109 325 714 1086 1350 1463 1481 1483 1483
Corn Growing Degree Days
50 M 84 82 110 178 306 490 688 670 545 361 169 94 3777
50 S 84 166 276 454 760 1250 1937 2607 3152 3513 3683 3777 3777
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