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

Cumulative Chilling Portions - Select Station from List

County Station Portions
Alameda 191 Pleasanton 70
  171 Union City 81
Amador 227 Plymouth 104
Butte 012 Durham 81
Colusa 250 Williams 76
Contra Costa 047 Brentwood 70
  170 Concord 99
  213 El Cerrito 89
  178 Moraga 84
El Dorado 013 Camino 104
  228 Diamond Springs 97
Fresno 205 Coalinga 76
  007 Firebaugh/Telles 73
  190 Five Points South West 60
  002 FivePoints/WSFS USDA 72
  080 Fresno State 69
  142 Orange Cove 67
  124 Panoche 80
  039 Parlier 68
  105 Westlands 68
Imperial 041 Calipatria/Mulberry 26
  087 Meloland 24
  175 Palo Verde II 39
  128 Salton Sea East 0
  127 Salton Sea West 0
  068 Seeley 23
  201 UC-Andrade 0
  186 UC-San Luis 0
  181 Westmorland North 26
Inyo 035 Bishop 83
  183 Owens Lake North 87
  189 Owens Lake South 79
Kern 125 Arvin-Edison 65
  146 Belridge 62
  054 Blackwells Corner 80
  005 Shafter/USDA 63
Kings 021 Kettleman 32
  015 Stratford 72
Lassen 057 Buntingville 103
Los Angeles 216 Arleta 40
  215 Chatsworth 41
  133 Glendale 0
  174 Long Beach 24
  159 Monrovia 37
  197 Palmdale 77
  220 Palmdale Central 73
  078 Pomona 43
  204 Santa Clarita 58
  099 Santa Monica 32
  219 West Hills 25
Madera 145 Madera 0
  188 Madera II 87
Marin 187 Black Point 82
  157 Point San Pedro 77
Mendocino 085 Hopland FS 0
  106 Sanel Valley 86
Merced 092 Kesterson 77
  056 Los Banos 71
  148 Merced 74
Modoc 090 Alturas 113
Monterey 114 Arroyo Seco 63
  210 Carmel 81
  019 Castroville 84
  113 King City-Oasis Rd. 71
  193 Pacific Grove 79
  129 Pajaro 67
  116 Salinas North 94
  214 Salinas South II 69
Napa 109 Carneros 79
  077 Oakville 75
Orange 245 Coto de Caza 42
  075 Irvine 36
  241 San Clemente 47
Placer 195 Auburn 81
Riverside 135 Blythe NE 37
  118 Cathedral City 0
  239 Hemet 59
  200 Indio 2 20
  208 La Quinta II 34
  238 Moreno Valley 44
  136 Oasis 15
  240 Perris 52
  151 Ripley 35
  062 Temecula 25
  237 Temecula East III 58
  218 Thermal South 29
  044 U.C. Riverside 48
  179 Winchester 41
Sacramento 131 Fair Oaks 75
  140 Twitchell Island 74
San Benito 126 San Benito 70
  143 San Juan Valley 76
San Bernardino 134 Barstow NE 0
  199 Big Bear Lake 111
  233 Joshua Tree 56
  192 Lake Arrowhead 105
  234 Newberry Springs II 60
  117 Victorville 62
San Diego 207 Borrego Springs 30
  153 Escondido SPV 46
  150 Miramar 35
  147 Otay Lake 29
  184 San Diego II 27
  173 Torrey Pines 27
San Joaquin 166 Lodi West 0
  070 Manteca 70
  167 Tracy 72
San Luis Obispo 163 Atascadero 74
  202 Nipomo 65
  052 San Luis Obispo 52
  160 San Luis Obispo West 60
Santa Barbara 088 Cuyama 78
  094 Goleta Foothills 0
  231 Lompoc 58
  107 Santa Barbara 102
  230 Santa Barbara II 50
  232 Santa Maria II 57
  064 Santa Ynez 59
  165 Sisquoc 62
Santa Clara 211 Gilroy 63
Santa Cruz 104 De Laveaga 88
  209 Watsonville West II 86
Shasta 043 McArthur 112
  224 Shasta College 89
Siskiyou 236 Macdoel II 117
  225 Scott Valley 113
  091 Tulelake FS 116
Solano 121 Dixon 93
  212 Hastings Tract East 90
  139 Winters 82
Sonoma 158 Bennett Valley 92
  144 Petaluma East 130
  083 Santa Rosa 86
  103 Windsor 100
Stanislaus 206 Denair 72
  071 Modesto 72
  194 Oakdale 30
  161 Patterson 68
Sutter 235 Verona 78
Tehama 008 Gerber 0
  222 Gerber South 81
Tulare 203 Alpaugh 74
  182 Delano 73
  086 Lindcove 63
  169 Porterville 69
Ventura 152 Camarillo 43
  217 Moorpark 43
  156 Oxnard 9
  198 Santa Paula 44
Yolo 155 Bryte 80
  006 Davis 78
  196 Esparto 68
  226 Woodland 76
Yuba 084 Browns Valley 81
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