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 79
  171 Union City 85
Amador 227 Plymouth 128
Butte 012 Durham 88
Colusa 250 Williams 81
Contra Costa 047 Brentwood 73
  170 Concord 104
  213 El Cerrito 123
  178 Moraga 102
El Dorado 013 Camino 131
  228 Diamond Springs 122
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 95
  183 Owens Lake North 95
  189 Owens Lake South 83
Kern 125 Arvin-Edison 68
  146 Belridge 64
  054 Blackwells Corner 86
  005 Shafter/USDA 67
Kings 021 Kettleman 35
  015 Stratford 73
Lassen 057 Buntingville 133
Los Angeles 216 Arleta 42
  215 Chatsworth 45
  133 Glendale 0
  174 Long Beach 25
  159 Monrovia 38
  197 Palmdale 84
  220 Palmdale Central 78
  078 Pomona 44
  204 Santa Clarita 61
  099 Santa Monica 33
  219 West Hills 27
Madera 145 Madera 0
  188 Madera II 95
Marin 187 Black Point 131
  157 Point San Pedro 85
Mendocino 085 Hopland FS 0
  106 Sanel Valley 103
Merced 092 Kesterson 81
  056 Los Banos 75
  148 Merced 79
Modoc 090 Alturas 151
Monterey 114 Arroyo Seco 70
  210 Carmel 114
  019 Castroville 120
  113 King City-Oasis Rd. 79
  193 Pacific Grove 127
  129 Pajaro 78
  116 Salinas North 112
  214 Salinas South II 83
Napa 109 Carneros 92
  077 Oakville 85
Orange 245 Coto de Caza 48
  075 Irvine 37
  241 San Clemente 53
Placer 195 Auburn 91
Riverside 135 Blythe NE 37
  118 Cathedral City 0
  239 Hemet 65
  200 Indio 2 20
  208 La Quinta II 34
  238 Moreno Valley 45
  136 Oasis 15
  240 Perris 55
  151 Ripley 35
  062 Temecula 28
  237 Temecula East III 64
  218 Thermal South 30
  044 U.C. Riverside 50
  179 Winchester 49
Sacramento 131 Fair Oaks 80
  140 Twitchell Island 77
San Benito 126 San Benito 78
  143 San Juan Valley 85
San Bernardino 134 Barstow NE 0
  199 Big Bear Lake 149
  233 Joshua Tree 58
  192 Lake Arrowhead 138
  234 Newberry Springs II 62
  117 Victorville 68
San Diego 207 Borrego Springs 30
  153 Escondido SPV 51
  150 Miramar 36
  147 Otay Lake 30
  184 San Diego II 28
  173 Torrey Pines 28
San Joaquin 166 Lodi West 0
  070 Manteca 75
  167 Tracy 78
San Luis Obispo 163 Atascadero 87
  202 Nipomo 88
  052 San Luis Obispo 58
  160 San Luis Obispo West 74
Santa Barbara 088 Cuyama 88
  094 Goleta Foothills 0
  231 Lompoc 74
  107 Santa Barbara 125
  230 Santa Barbara II 55
  232 Santa Maria II 68
  064 Santa Ynez 65
  165 Sisquoc 70
Santa Clara 211 Gilroy 68
Santa Cruz 104 De Laveaga 101
  209 Watsonville West II 116
Shasta 043 McArthur 143
  224 Shasta College 102
Siskiyou 236 Macdoel II 151
  225 Scott Valley 142
  091 Tulelake FS 150
Solano 121 Dixon 102
  212 Hastings Tract East 102
  139 Winters 88
Sonoma 158 Bennett Valley 108
  144 Petaluma East 181
  083 Santa Rosa 103
  103 Windsor 112
Stanislaus 206 Denair 76
  071 Modesto 75
  194 Oakdale 38
  161 Patterson 73
Sutter 235 Verona 83
Tehama 008 Gerber 0
  222 Gerber South 89
Tulare 203 Alpaugh 79
  182 Delano 78
  086 Lindcove 67
  169 Porterville 77
Ventura 152 Camarillo 45
  217 Moorpark 46
  156 Oxnard 13
  198 Santa Paula 45
Yolo 155 Bryte 85
  006 Davis 84
  196 Esparto 72
  226 Woodland 81
Yuba 084 Browns Valley 89
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