CALISTOGA, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(041312) CALISTOGA
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 262 330 440 531 706 854 1011 989 875 707 406 249 7362
40 S 262 592 1033 1564 2270 3124 4135 5124 5999 6707 7113 7362 7362
45 M 126 196 288 381 551 704 856 834 725 552 260 119 5593
45 S 126 322 610 991 1543 2247 3103 3937 4662 5214 5475 5593 5593
50 M 38 90 153 237 397 554 701 679 575 398 134 35 3990
50 S 38 128 281 518 914 1469 2169 2849 3424 3822 3955 3990 3990
55 M 7 27 59 118 247 405 546 524 425 251 45 5 2659
55 S 7 34 93 211 458 863 1409 1933 2358 2609 2655 2659 2659
60 M 1 5 15 44 126 258 391 369 278 126 9 0 1621
60 S 1 5 21 65 191 449 839 1209 1486 1612 1621 1621 1621
Corn Growing Degree Days
50 M 154 206 273 338 447 524 602 591 532 452 256 141 4515
50 S 154 360 633 972 1418 1942 2544 3135 3667 4119 4374 4515 4515
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