Fruit & Nut Research & Information Center
Fruit & Nut Research & Information Center
Fruit & Nut Research & Information Center
University of California
Fruit & Nut Research & Information Center

Calculators

Cumulative Chilling Hours:
Cumulative Chill Hours and
Modified Chill Hours
Hours below 45° F
Hours between 32 F and 45° F
November 1 through February 28/29.

Cumulative Chilling Portions:
Dynamic Model
September 1 through August 31

Chilling Hour & Unit Accumulations:
Historic Accumulation of
Chill Hours, Modified Chill Hours,
& Chill Units (Utah Model)

Hours below 45° F
Hours between 32° F and 45° F
September 1 through August 31

Harvest Prediction Model:
for Peaches, Plums and Nectarines

Cumulative Chilling Hours - Select Station from List

County Station Hours < 45°F Hours >32° and <45°F
Alameda 191 Pleasanton 852 791
  171 Union City 870 842
Amador 227 Plymouth 1332 1218
Butte 244 Biggs 835 825
  012 Durham 996 913
Colusa 250 Williams 925 885
Contra Costa 047 Brentwood 686 674
  170 Concord 1045 941
  213 El Cerrito 305 305
  178 Moraga 957 825
El Dorado 013 Camino 1253 1120
  228 Diamond Springs 1051 983
Fresno 205 Coalinga 664 658
  007 Firebaugh/Telles 754 722
  190 Five Points South West 848 761
  002 FivePoints/WSFS USDA 882 792
  080 Fresno State 852 768
  142 Orange Cove 878 803
  124 Panoche 826 780
  039 Parlier 845 794
  105 Westlands 1011 902
Imperial 041 Calipatria/Mulberry 618 584
  087 Meloland 448 418
  175 Palo Verde II 968 844
  128 Salton Sea East 0 0
  127 Salton Sea West 0 0
  068 Seeley 485 484
  201 UC-Andrade 0 0
  186 UC-San Luis 0 0
  181 Westmorland North 491 471
Inyo 035 Bishop 2147 1094
  183 Owens Lake North 1794 1324
  189 Owens Lake South 1838 1153
Kern 125 Arvin-Edison 804 737
  146 Belridge 882 813
  054 Blackwells Corner 933 856
  005 Shafter/USDA 848 780
Kings 021 Kettleman 0 0
  015 Stratford 846 790
Lassen 057 Buntingville 2504 1130
Los Angeles 216 Arleta 305 305
  215 Chatsworth 243 243
  133 Glendale 0 0
  174 Long Beach 152 152
  159 Monrovia 438 365
  197 Palmdale 1413 1087
  220 Palmdale Central 1285 1131
  078 Pomona 420 413
  204 Santa Clarita 506 493
  099 Santa Monica 48 48
  219 West Hills 332 332
Madera 145 Madera 0 0
  188 Madera II 0 0
Marin 187 Black Point 725 654
  157 Point San Pedro 632 612
Mendocino 085 Hopland FS 0 0
  106 Sanel Valley 0 0
Merced 092 Kesterson 1126 972
  056 Los Banos 839 780
  148 Merced 1207 901
Modoc 090 Alturas 2570 1256
Monterey 114 Arroyo Seco 733 697
  210 Carmel 569 560
  019 Castroville 481 478
  113 King City-Oasis Rd. 899 808
  193 Pacific Grove 131 131
  129 Pajaro 620 596
  116 Salinas North 446 446
  214 Salinas South II 441 438
Napa 109 Carneros 922 801
  077 Oakville 931 867
Orange 245 Coto de Caza 404 403
  075 Irvine 172 172
  241 San Clemente 353 353
Placer 195 Auburn 1915 494
Riverside 135 Blythe NE 752 726
  118 Cathedral City 0 0
  239 Hemet 639 607
  200 Indio 2 304 298
  208 La Quinta II 243 243
  238 Moreno Valley 0 0
  136 Oasis 206 206
  240 Perris 737 676
  151 Ripley 811 761
  062 Temecula 241 241
  237 Temecula East III 426 423
  218 Thermal South 575 549
  044 U.C. Riverside 232 232
  179 Winchester 848 768
Sacramento 131 Fair Oaks 772 758
  140 Twitchell Island 752 742
San Benito 126 San Benito 771 711
  143 San Juan Valley 878 799
San Bernardino 134 Barstow NE 0 0
  199 Big Bear Lake 2076 1189
  233 Joshua Tree 1194 1057
  192 Lake Arrowhead 2264 1294
  234 Newberry Springs II 1155 1043
  117 Victorville 1294 1143
San Diego 207 Borrego Springs 622 593
  153 Escondido SPV 376 362
  150 Miramar 218 218
  147 Otay Lake 228 228
  184 San Diego II 152 105
  173 Torrey Pines 177 105
San Joaquin 166 Lodi West 0 0
  070 Manteca 924 810
  167 Tracy 0 0
San Luis Obispo 163 Atascadero 1036 822
  202 Nipomo 234 234
  052 San Luis Obispo 335 335
  160 San Luis Obispo West 464 458
Santa Barbara 088 Cuyama 1300 1083
  094 Goleta Foothills 0 0
  231 Lompoc 592 562
  107 Santa Barbara 155 155
  230 Santa Barbara II 0 0
  232 Santa Maria II 378 377
  064 Santa Ynez 847 721
  165 Sisquoc 573 560
Santa Clara 211 Gilroy 719 655
Santa Cruz 104 De Laveaga 466 465
  209 Watsonville West II 352 352
Shasta 043 McArthur 2530 1485
  224 Shasta College 1083 884
Siskiyou 236 Macdoel II 2562 1166
  225 Scott Valley 2375 1298
  091 Tulelake FS 2598 1242
Solano 121 Dixon 929 866
  212 Hastings Tract East 983 898
  139 Winters 871 798
Sonoma 158 Bennett Valley 1023 916
  144 Petaluma East 923 829
  083 Santa Rosa 1038 857
  103 Windsor 987 845
Stanislaus 206 Denair 855 799
  071 Modesto 948 844
  194 Oakdale 934 866
  161 Patterson 0 0
Sutter 235 Verona 952 878
Tehama 008 Gerber 0 0
  222 Gerber South 1009 952
Tulare 203 Alpaugh 0 0
  182 Delano 613 570
  086 Lindcove 1179 1086
  169 Porterville 1647 1337
Ventura 152 Camarillo 325 325
  217 Moorpark 233 233
  156 Oxnard 0 0
  198 Santa Paula 405 403
Yolo 155 Bryte 727 727
  006 Davis 762 752
  196 Esparto 0 0
  226 Woodland 752 741
Yuba 084 Browns Valley 621 617
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