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

Harvest Prediction Model - Select Station from List

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