MERCED MUNICIPAL ARPT, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(045532) MERCED MUNICIPAL ARPT
From Year=1899 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 183 289 440 587 823 1008 1210 1152 973 729 386 186 7965
40 S 183 472 912 1499 2322 3330 4539 5691 6664 7393 7779 7965 7965
45 M 76 157 287 437 668 858 1055 997 823 574 241 76 6248
45 S 76 233 520 958 1626 2483 3538 4534 5357 5931 6172 6248 6248
50 M 21 60 150 290 513 708 900 842 673 420 119 21 4713
50 S 21 80 230 520 1033 1741 2640 3482 4155 4574 4693 4713 4713
55 M 3 12 54 159 360 558 745 687 523 270 41 3 3413
55 S 3 15 69 228 588 1146 1890 2577 3100 3369 3410 3413 3413
60 M 0 1 10 66 217 408 590 532 373 139 7 0 2344
60 S 0 1 11 77 294 702 1292 1824 2197 2336 2343 2344 2344
Corn Growing Degree Days
50 M 93 167 268 367 512 620 727 696 597 464 246 102 4859
50 S 93 260 528 895 1407 2028 2754 3450 4047 4511 4758 4859 4859
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