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 84
  171 Union City 115
Amador 227 Plymouth 110
Butte 012 Durham 90
Colusa 250 Williams 82
Contra Costa 047 Brentwood 83
  170 Concord 95
  213 El Cerrito 93
  178 Moraga 97
El Dorado 013 Camino 104
  228 Diamond Springs 103
Fresno 205 Coalinga 74
  007 Firebaugh/Telles 82
  190 Five Points South West 70
  002 FivePoints/WSFS USDA 74
  080 Fresno State 76
  142 Orange Cove 77
  124 Panoche 89
  039 Parlier 77
  105 Westlands 71
Imperial 041 Calipatria/Mulberry 18
  087 Meloland 12
  175 Palo Verde II 26
  128 Salton Sea East 0
  127 Salton Sea West 0
  068 Seeley 13
  201 UC-Andrade 0
  186 UC-San Luis 0
  181 Westmorland North 14
Inyo 035 Bishop 93
  183 Owens Lake North 94
  189 Owens Lake South 89
Kern 125 Arvin-Edison 68
  146 Belridge 63
  054 Blackwells Corner 86
  005 Shafter/USDA 70
Kings 021 Kettleman 0
  015 Stratford 69
Lassen 057 Buntingville 127
Los Angeles 216 Arleta 32
  215 Chatsworth 33
  133 Glendale 0
  174 Long Beach 19
  159 Monrovia 22
  197 Palmdale 72
  220 Palmdale Central 71
  078 Pomona 32
  204 Santa Clarita 36
  099 Santa Monica 24
  219 West Hills 28
Madera 145 Madera 0
  188 Madera II 89
Marin 187 Black Point 89
  157 Point San Pedro 94
Mendocino 085 Hopland FS 0
  106 Sanel Valley 107
Merced 092 Kesterson 83
  056 Los Banos 77
  148 Merced 90
Modoc 090 Alturas 132
Monterey 114 Arroyo Seco 70
  210 Carmel 74
  019 Castroville 106
  113 King City-Oasis Rd. 64
  193 Pacific Grove 94
  129 Pajaro 68
  116 Salinas North 84
  214 Salinas South II 73
Napa 109 Carneros 89
  077 Oakville 83
Orange 245 Coto de Caza 31
  075 Irvine 26
  241 San Clemente 42
Placer 195 Auburn 93
Riverside 135 Blythe NE 23
  118 Cathedral City 0
  239 Hemet 45
  200 Indio 2 11
  208 La Quinta II 22
  238 Moreno Valley 24
  136 Oasis 10
  240 Perris 31
  151 Ripley 29
  062 Temecula 29
  237 Temecula East III 25
  218 Thermal South 14
  044 U.C. Riverside 27
  179 Winchester 35
Sacramento 131 Fair Oaks 83
  140 Twitchell Island 84
San Benito 126 San Benito 68
  143 San Juan Valley 72
San Bernardino 134 Barstow NE 0
  199 Big Bear Lake 125
  233 Joshua Tree 55
  192 Lake Arrowhead 117
  234 Newberry Springs II 61
  117 Victorville 11
San Diego 207 Borrego Springs 16
  153 Escondido SPV 39
  150 Miramar 31
  147 Otay Lake 42
  184 San Diego II 24
  173 Torrey Pines 25
San Joaquin 166 Lodi West 0
  070 Manteca 85
  167 Tracy 0
San Luis Obispo 163 Atascadero 79
  202 Nipomo 60
  052 San Luis Obispo 30
  160 San Luis Obispo West 54
Santa Barbara 088 Cuyama 80
  094 Goleta Foothills 0
  231 Lompoc 63
  107 Santa Barbara 45
  230 Santa Barbara II 10
  232 Santa Maria II 51
  064 Santa Ynez 46
  165 Sisquoc 62
Santa Clara 211 Gilroy 68
Santa Cruz 104 De Laveaga 81
  209 Watsonville West II 91
Shasta 043 McArthur 132
  224 Shasta College 92
Siskiyou 236 Macdoel II 129
  225 Scott Valley 133
  091 Tulelake FS 133
Solano 121 Dixon 96
  212 Hastings Tract East 109
  139 Winters 88
Sonoma 158 Bennett Valley 93
  144 Petaluma East 127
  083 Santa Rosa 95
  103 Windsor 87
Stanislaus 206 Denair 85
  071 Modesto 84
  194 Oakdale 90
  161 Patterson 20
Sutter 235 Verona 88
Tehama 008 Gerber 0
  222 Gerber South 89
Tulare 203 Alpaugh 17
  182 Delano 35
  086 Lindcove 76
  169 Porterville 82
Ventura 152 Camarillo 42
  217 Moorpark 30
  156 Oxnard 0
  198 Santa Paula 25
Yolo 155 Bryte 90
  006 Davis 84
  196 Esparto 0
  226 Woodland 82
Yuba 084 Browns Valley 86
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