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 1
  171 Union City 16
Amador 227 Plymouth 3
Butte 012 Durham 1
Colusa 250 Williams 1
Contra Costa 047 Brentwood 0
  170 Concord 1
  213 El Cerrito 3
  178 Moraga 3
El Dorado 013 Camino 5
  228 Diamond Springs 3
Fresno 205 Coalinga 0
  007 Firebaugh/Telles 1
  190 Five Points South West 0
  002 FivePoints/WSFS USDA 0
  080 Fresno State 1
  142 Orange Cove 1
  124 Panoche 0
  039 Parlier 1
  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 7
  183 Owens Lake North 1
  189 Owens Lake South 0
Kern 125 Arvin-Edison 0
  146 Belridge 0
  054 Blackwells Corner 1
  005 Shafter/USDA 0
Kings 021 Kettleman 0
  015 Stratford 0
Lassen 057 Buntingville 14
Los Angeles 216 Arleta 0
  215 Chatsworth 0
  133 Glendale 0
  174 Long Beach 0
  159 Monrovia 0
  197 Palmdale 1
  220 Palmdale Central 1
  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 1
  157 Point San Pedro 2
Mendocino 085 Hopland FS 0
  106 Sanel Valley 1
Merced 092 Kesterson 1
  056 Los Banos 0
  148 Merced 1
Modoc 090 Alturas 18
Monterey 114 Arroyo Seco 2
  210 Carmel 4
  019 Castroville 15
  113 King City-Oasis Rd. 1
  193 Pacific Grove 7
  129 Pajaro 4
  116 Salinas North 5
  214 Salinas South II 4
Napa 109 Carneros 2
  077 Oakville 1
Orange 245 Coto de Caza 0
  075 Irvine 0
  241 San Clemente 0
Placer 195 Auburn 1
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 1
  140 Twitchell Island 1
San Benito 126 San Benito 1
  143 San Juan Valley 2
San Bernardino 134 Barstow NE 0
  199 Big Bear Lake 16
  233 Joshua Tree 0
  192 Lake Arrowhead 13
  234 Newberry Springs II 0
  117 Victorville 0
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 1
  167 Tracy 0
San Luis Obispo 163 Atascadero 2
  202 Nipomo 1
  052 San Luis Obispo 0
  160 San Luis Obispo West 0
Santa Barbara 088 Cuyama 3
  094 Goleta Foothills 0
  231 Lompoc 2
  107 Santa Barbara 6
  230 Santa Barbara II 0
  232 Santa Maria II 0
  064 Santa Ynez 1
  165 Sisquoc 1
Santa Clara 211 Gilroy 1
Santa Cruz 104 De Laveaga 3
  209 Watsonville West II 5
Shasta 043 McArthur 15
  224 Shasta College 1
Siskiyou 236 Macdoel II 19
  225 Scott Valley 14
  091 Tulelake FS 20
Solano 121 Dixon 0
  212 Hastings Tract East 1
  139 Winters 1
Sonoma 158 Bennett Valley 1
  144 Petaluma East 5
  083 Santa Rosa 2
  103 Windsor 1
Stanislaus 206 Denair 1
  071 Modesto 1
  194 Oakdale 1
  161 Patterson 0
Sutter 235 Verona 1
Tehama 008 Gerber 0
  222 Gerber South 1
Tulare 203 Alpaugh 0
  182 Delano 1
  086 Lindcove 0
  169 Porterville 1
Ventura 152 Camarillo 0
  217 Moorpark 0
  156 Oxnard 0
  198 Santa Paula 0
Yolo 155 Bryte 1
  006 Davis 1
  196 Esparto 0
  226 Woodland 1
Yuba 084 Browns Valley 1
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