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 75
  171 Union City 83
Amador 227 Plymouth 121
Butte 012 Durham 88
Colusa 250 Williams 81
Contra Costa 047 Brentwood 73
  170 Concord 104
  213 El Cerrito 103
  178 Moraga 94
El Dorado 013 Camino 122
  228 Diamond Springs 114
Fresno 205 Coalinga 79
  007 Firebaugh/Telles 75
  190 Five Points South West 61
  002 FivePoints/WSFS USDA 75
  080 Fresno State 74
  142 Orange Cove 69
  124 Panoche 82
  039 Parlier 73
  105 Westlands 70
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 92
  183 Owens Lake North 93
  189 Owens Lake South 82
Kern 125 Arvin-Edison 68
  146 Belridge 64
  054 Blackwells Corner 85
  005 Shafter/USDA 67
Kings 021 Kettleman 34
  015 Stratford 73
Lassen 057 Buntingville 124
Los Angeles 216 Arleta 40
  215 Chatsworth 42
  133 Glendale 0
  174 Long Beach 24
  159 Monrovia 37
  197 Palmdale 82
  220 Palmdale Central 76
  078 Pomona 43
  204 Santa Clarita 59
  099 Santa Monica 32
  219 West Hills 25
Madera 145 Madera 0
  188 Madera II 95
Marin 187 Black Point 105
  157 Point San Pedro 83
Mendocino 085 Hopland FS 0
  106 Sanel Valley 99
Merced 092 Kesterson 81
  056 Los Banos 75
  148 Merced 79
Modoc 090 Alturas 135
Monterey 114 Arroyo Seco 67
  210 Carmel 94
  019 Castroville 97
  113 King City-Oasis Rd. 77
  193 Pacific Grove 93
  129 Pajaro 73
  116 Salinas North 102
  214 Salinas South II 78
Napa 109 Carneros 89
  077 Oakville 82
Orange 245 Coto de Caza 44
  075 Irvine 36
  241 San Clemente 51
Placer 195 Auburn 91
Riverside 135 Blythe NE 37
  118 Cathedral City 0
  239 Hemet 62
  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 60
  218 Thermal South 29
  044 U.C. Riverside 48
  179 Winchester 45
Sacramento 131 Fair Oaks 80
  140 Twitchell Island 77
San Benito 126 San Benito 76
  143 San Juan Valley 81
San Bernardino 134 Barstow NE 0
  199 Big Bear Lake 133
  233 Joshua Tree 57
  192 Lake Arrowhead 124
  234 Newberry Springs II 61
  117 Victorville 65
San Diego 207 Borrego Springs 30
  153 Escondido SPV 48
  150 Miramar 35
  147 Otay Lake 29
  184 San Diego II 27
  173 Torrey Pines 27
San Joaquin 166 Lodi West 0
  070 Manteca 75
  167 Tracy 77
San Luis Obispo 163 Atascadero 81
  202 Nipomo 71
  052 San Luis Obispo 54
  160 San Luis Obispo West 63
Santa Barbara 088 Cuyama 84
  094 Goleta Foothills 0
  231 Lompoc 66
  107 Santa Barbara 104
  230 Santa Barbara II 52
  232 Santa Maria II 63
  064 Santa Ynez 62
  165 Sisquoc 66
Santa Clara 211 Gilroy 66
Santa Cruz 104 De Laveaga 97
  209 Watsonville West II 97
Shasta 043 McArthur 134
  224 Shasta College 101
Siskiyou 236 Macdoel II 140
  225 Scott Valley 134
  091 Tulelake FS 139
Solano 121 Dixon 102
  212 Hastings Tract East 101
  139 Winters 88
Sonoma 158 Bennett Valley 102
  144 Petaluma East 153
  083 Santa Rosa 98
  103 Windsor 109
Stanislaus 206 Denair 76
  071 Modesto 75
  194 Oakdale 38
  161 Patterson 71
Sutter 235 Verona 83
Tehama 008 Gerber 0
  222 Gerber South 89
Tulare 203 Alpaugh 77
  182 Delano 78
  086 Lindcove 67
  169 Porterville 76
Ventura 152 Camarillo 43
  217 Moorpark 44
  156 Oxnard 9
  198 Santa Paula 44
Yolo 155 Bryte 85
  006 Davis 83
  196 Esparto 72
  226 Woodland 81
Yuba 084 Browns Valley 89
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