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 86
  171 Union City 121
Amador 227 Plymouth 114
Butte 012 Durham 90
Colusa 250 Williams 82
Contra Costa 047 Brentwood 83
  170 Concord 95
  213 El Cerrito 107
  178 Moraga 103
El Dorado 013 Camino 109
  228 Diamond Springs 107
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 90
  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 108
  183 Owens Lake North 95
  189 Owens Lake South 90
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 133
Los Angeles 216 Arleta 33
  215 Chatsworth 36
  133 Glendale 0
  174 Long Beach 19
  159 Monrovia 23
  197 Palmdale 74
  220 Palmdale Central 72
  078 Pomona 33
  204 Santa Clarita 37
  099 Santa Monica 25
  219 West Hills 29
Madera 145 Madera 0
  188 Madera II 89
Marin 187 Black Point 92
  157 Point San Pedro 97
Mendocino 085 Hopland FS 0
  106 Sanel Valley 116
Merced 092 Kesterson 84
  056 Los Banos 77
  148 Merced 91
Modoc 090 Alturas 143
Monterey 114 Arroyo Seco 72
  210 Carmel 82
  019 Castroville 109
  113 King City-Oasis Rd. 66
  193 Pacific Grove 108
  129 Pajaro 74
  116 Salinas North 93
  214 Salinas South II 76
Napa 109 Carneros 93
  077 Oakville 85
Orange 245 Coto de Caza 33
  075 Irvine 27
  241 San Clemente 44
Placer 195 Auburn 94
Riverside 135 Blythe NE 23
  118 Cathedral City 0
  239 Hemet 48
  200 Indio 2 11
  208 La Quinta II 22
  238 Moreno Valley 24
  136 Oasis 10
  240 Perris 33
  151 Ripley 29
  062 Temecula 32
  237 Temecula East III 26
  218 Thermal South 14
  044 U.C. Riverside 28
  179 Winchester 38
Sacramento 131 Fair Oaks 83
  140 Twitchell Island 84
San Benito 126 San Benito 71
  143 San Juan Valley 78
San Bernardino 134 Barstow NE 0
  199 Big Bear Lake 135
  233 Joshua Tree 56
  192 Lake Arrowhead 127
  234 Newberry Springs II 62
  117 Victorville 13
San Diego 207 Borrego Springs 16
  153 Escondido SPV 40
  150 Miramar 32
  147 Otay Lake 46
  184 San Diego II 25
  173 Torrey Pines 26
San Joaquin 166 Lodi West 0
  070 Manteca 85
  167 Tracy 0
San Luis Obispo 163 Atascadero 82
  202 Nipomo 70
  052 San Luis Obispo 31
  160 San Luis Obispo West 65
Santa Barbara 088 Cuyama 82
  094 Goleta Foothills 0
  231 Lompoc 70
  107 Santa Barbara 48
  230 Santa Barbara II 10
  232 Santa Maria II 56
  064 Santa Ynez 47
  165 Sisquoc 68
Santa Clara 211 Gilroy 69
Santa Cruz 104 De Laveaga 89
  209 Watsonville West II 105
Shasta 043 McArthur 138
  224 Shasta College 94
Siskiyou 236 Macdoel II 138
  225 Scott Valley 138
  091 Tulelake FS 142
Solano 121 Dixon 97
  212 Hastings Tract East 111
  139 Winters 89
Sonoma 158 Bennett Valley 100
  144 Petaluma East 136
  083 Santa Rosa 102
  103 Windsor 94
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 44
  217 Moorpark 31
  156 Oxnard 0
  198 Santa Paula 25
Yolo 155 Bryte 90
  006 Davis 85
  196 Esparto 0
  226 Woodland 82
Yuba 084 Browns Valley 87
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