PETALUMA FIRE STN 3, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(046826) PETALUMA FIRE STN 3
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 233 311 401 470 612 730 836 845 799 674 411 244 6566
40 S 233 544 945 1415 2027 2757 3593 4437 5236 5911 6322 6566 6566
45 M 106 175 247 321 457 580 681 690 649 519 264 115 4803
45 S 106 281 529 849 1306 1886 2567 3257 3906 4425 4689 4803 4803
50 M 31 68 113 178 303 430 526 535 499 365 133 36 3215
50 S 31 98 211 389 692 1122 1648 2182 2681 3046 3179 3215 3215
55 M 5 14 31 69 157 280 371 380 349 214 44 5 1917
55 S 5 18 49 118 275 555 926 1305 1654 1868 1912 1917 1917
60 M 0 1 4 17 56 140 217 225 201 89 8 0 956
60 S 0 1 5 22 78 218 434 659 860 949 956 956 956
Corn Growing Degree Days
50 M 110 166 224 276 358 433 512 519 486 412 238 120 3856
50 S 110 276 500 777 1135 1568 2080 2600 3086 3498 3737 3856 3856
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