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

Chill 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 Portions - Select Station from List

County Station Portions
Alameda 191 Pleasanton 0
  171 Union City 0
Amador 227 Plymouth 0
Butte 244 Biggs 0
  012 Durham 0
Colusa 250 Williams 0
Contra Costa 047 Brentwood 0
  170 Concord 0
  213 El Cerrito 5
  178 Moraga 0
El Dorado 013 Camino 0
  228 Diamond Springs 0
Fresno 205 Coalinga 0
  007 Firebaugh/Telles 0
  190 Five Points South West 0
  002 FivePoints/WSFS USDA 0
  080 Fresno State 0
  142 Orange Cove 0
  124 Panoche 0
  039 Parlier 0
  105 Westlands 0
Imperial 041 Calipatria/Mulberry 0
  087 Meloland 0
  175 Palo Verde II 0
  128 Salton Sea East 0
  127 Salton Sea West 0
  068 Seeley 0
  201 UC-Andrade 0
  186 UC-San Luis 0
  181 Westmorland North 0
Inyo 035 Bishop 2
  183 Owens Lake North 0
  189 Owens Lake South 0
Kern 125 Arvin-Edison 0
  146 Belridge 0
  054 Blackwells Corner 0
  005 Shafter/USDA 0
Kings 021 Kettleman 0
  015 Stratford 0
Lassen 057 Buntingville 9
Los Angeles 216 Arleta 0
  215 Chatsworth 0
  133 Glendale 0
  174 Long Beach 0
  159 Monrovia 0
  197 Palmdale 0
  220 Palmdale Central 0
  078 Pomona 0
  204 Santa Clarita 0
  099 Santa Monica 0
  219 West Hills 0
Madera 145 Madera 0
  188 Madera II 0
Marin 187 Black Point 0
  157 Point San Pedro 1
Mendocino 085 Hopland FS 0
  106 Sanel Valley 6
Merced 092 Kesterson 0
  056 Los Banos 0
  148 Merced 0
Modoc 090 Alturas 15
Monterey 114 Arroyo Seco 0
  210 Carmel 0
  019 Castroville 2
  113 King City-Oasis Rd. 0
  193 Pacific Grove 5
  129 Pajaro 4
  116 Salinas North 1
  214 Salinas South II 0
Napa 109 Carneros 0
  077 Oakville 0
Orange 245 Coto de Caza 0
  075 Irvine 0
  241 San Clemente 0
Placer 195 Auburn 0
Riverside 135 Blythe NE 0
  118 Cathedral City 0
  239 Hemet 0
  200 Indio 2 0
  208 La Quinta II 0
  238 Moreno Valley 0
  136 Oasis 0
  240 Perris 0
  151 Ripley 0
  062 Temecula 0
  237 Temecula East III 0
  218 Thermal South 0
  044 U.C. Riverside 0
  179 Winchester 0
Sacramento 131 Fair Oaks 0
  140 Twitchell Island 0
San Benito 126 San Benito 0
  143 San Juan Valley 0
San Bernardino 134 Barstow NE 0
  199 Big Bear Lake 12
  233 Joshua Tree 0
  192 Lake Arrowhead 11
  234 Newberry Springs II 0
  117 Victorville 1
San Diego 207 Borrego Springs 0
  153 Escondido SPV 0
  150 Miramar 0
  147 Otay Lake 0
  184 San Diego II 0
  173 Torrey Pines 0
San Joaquin 166 Lodi West 0
  070 Manteca 0
  167 Tracy 0
San Luis Obispo 163 Atascadero 1
  202 Nipomo 1
  052 San Luis Obispo 0
  160 San Luis Obispo West 0
Santa Barbara 088 Cuyama 0
  094 Goleta Foothills 0
  231 Lompoc 0
  107 Santa Barbara 0
  230 Santa Barbara II 0
  232 Santa Maria II 0
  064 Santa Ynez 0
  165 Sisquoc 0
Santa Clara 211 Gilroy 0
Santa Cruz 104 De Laveaga 3
  209 Watsonville West II 7
Shasta 043 McArthur 11
  224 Shasta College 0
Siskiyou 236 Macdoel II 15
  225 Scott Valley 7
  091 Tulelake FS 17
Solano 121 Dixon 0
  212 Hastings Tract East 0
  139 Winters 0
Sonoma 158 Bennett Valley 1
  144 Petaluma East 1
  083 Santa Rosa 0
  103 Windsor 0
Stanislaus 206 Denair 0
  071 Modesto 0
  194 Oakdale 0
  161 Patterson 0
Sutter 235 Verona 0
Tehama 008 Gerber 0
  222 Gerber South 0
Tulare 203 Alpaugh 0
  182 Delano 0
  086 Lindcove 0
  169 Porterville 0
Ventura 152 Camarillo 0
  217 Moorpark 0
  156 Oxnard 0
  198 Santa Paula 0
Yolo 155 Bryte 0
  006 Davis 0
  196 Esparto 0
  226 Woodland 0
Yuba 084 Browns Valley 0
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