SAN JOSE, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047821) SAN JOSE
From Year=1948 To Year=2005
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 304 372 486 560 707 809 916 912 852 721 467 312 7419
40 S 304 676 1162 1722 2429 3238 4154 5067 5919 6640 7107 7419 7419
45 M 161 233 331 410 552 659 761 757 702 566 317 168 5619
45 S 161 394 725 1136 1688 2347 3108 3865 4568 5134 5451 5619 5619
50 M 60 109 183 262 397 509 606 602 552 411 177 64 3933
50 S 60 169 352 614 1011 1520 2126 2729 3281 3692 3869 3933 3933
55 M 13 32 71 130 245 359 451 447 402 258 68 15 2491
55 S 13 45 116 246 490 850 1300 1748 2150 2408 2476 2491 2491
60 M 1 4 17 46 113 212 296 292 253 121 13 1 1370
60 S 1 6 22 68 181 393 689 982 1234 1355 1369 1370 1370
Corn Growing Degree Days
50 M 132 178 250 309 409 495 587 586 536 425 239 135 4283
50 S 132 311 561 870 1279 1773 2361 2947 3483 3908 4147 4283 4283
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 Apr 5, 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