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 61
  171 Union City 68
Amador 227 Plymouth 74
Butte 244 Biggs 68
  012 Durham 70
Colusa 250 Williams 66
Contra Costa 047 Brentwood 59
  170 Concord 67
  213 El Cerrito 67
  178 Moraga 66
El Dorado 013 Camino 71
  228 Diamond Springs 70
Fresno 205 Coalinga 60
  007 Firebaugh/Telles 60
  190 Five Points South West 58
  002 FivePoints/WSFS USDA 60
  080 Fresno State 58
  142 Orange Cove 58
  124 Panoche 61
  039 Parlier 62
  105 Westlands 62
Imperial 041 Calipatria/Mulberry 29
  087 Meloland 27
  175 Palo Verde II 47
  128 Salton Sea East 0
  127 Salton Sea West 0
  068 Seeley 30
  201 UC-Andrade 0
  186 UC-San Luis 0
  181 Westmorland North 30
Inyo 035 Bishop 66
  183 Owens Lake North 72
  189 Owens Lake South 72
Kern 125 Arvin-Edison 55
  146 Belridge 54
  054 Blackwells Corner 63
  005 Shafter/USDA 57
Kings 021 Kettleman 0
  015 Stratford 59
Lassen 057 Buntingville 79
Los Angeles 216 Arleta 37
  215 Chatsworth 36
  133 Glendale 0
  174 Long Beach 14
  159 Monrovia 36
  197 Palmdale 63
  220 Palmdale Central 64
  078 Pomona 39
  204 Santa Clarita 42
  099 Santa Monica 23
  219 West Hills 37
Madera 145 Madera 0
  188 Madera II 0
Marin 187 Black Point 66
  157 Point San Pedro 69
Mendocino 085 Hopland FS 0
  106 Sanel Valley 6
Merced 092 Kesterson 65
  056 Los Banos 62
  148 Merced 67
Modoc 090 Alturas 89
Monterey 114 Arroyo Seco 55
  210 Carmel 50
  019 Castroville 54
  113 King City-Oasis Rd. 57
  193 Pacific Grove 56
  129 Pajaro 60
  116 Salinas North 58
  214 Salinas South II 55
Napa 109 Carneros 63
  077 Oakville 64
Orange 245 Coto de Caza 37
  075 Irvine 29
  241 San Clemente 38
Placer 195 Auburn 43
Riverside 135 Blythe NE 36
  118 Cathedral City 0
  239 Hemet 46
  200 Indio 2 22
  208 La Quinta II 24
  238 Moreno Valley 0
  136 Oasis 16
  240 Perris 41
  151 Ripley 46
  062 Temecula 37
  237 Temecula East III 39
  218 Thermal South 24
  044 U.C. Riverside 35
  179 Winchester 50
Sacramento 131 Fair Oaks 64
  140 Twitchell Island 63
San Benito 126 San Benito 52
  143 San Juan Valley 60
San Bernardino 134 Barstow NE 0
  199 Big Bear Lake 90
  233 Joshua Tree 61
  192 Lake Arrowhead 89
  234 Newberry Springs II 60
  117 Victorville 64
San Diego 207 Borrego Springs 30
  153 Escondido SPV 22
  150 Miramar 30
  147 Otay Lake 30
  184 San Diego II 23
  173 Torrey Pines 24
San Joaquin 166 Lodi West 0
  070 Manteca 61
  167 Tracy 0
San Luis Obispo 163 Atascadero 59
  202 Nipomo 37
  052 San Luis Obispo 39
  160 San Luis Obispo West 43
Santa Barbara 088 Cuyama 61
  094 Goleta Foothills 0
  231 Lompoc 42
  107 Santa Barbara 24
  230 Santa Barbara II 0
  232 Santa Maria II 34
  064 Santa Ynez 42
  165 Sisquoc 43
Santa Clara 211 Gilroy 53
Santa Cruz 104 De Laveaga 58
  209 Watsonville West II 67
Shasta 043 McArthur 87
  224 Shasta College 64
Siskiyou 236 Macdoel II 88
  225 Scott Valley 77
  091 Tulelake FS 89
Solano 121 Dixon 64
  212 Hastings Tract East 66
  139 Winters 65
Sonoma 158 Bennett Valley 69
  144 Petaluma East 66
  083 Santa Rosa 66
  103 Windsor 63
Stanislaus 206 Denair 64
  071 Modesto 64
  194 Oakdale 67
  161 Patterson 0
Sutter 235 Verona 66
Tehama 008 Gerber 0
  222 Gerber South 68
Tulare 203 Alpaugh 0
  182 Delano 49
  086 Lindcove 66
  169 Porterville 69
Ventura 152 Camarillo 36
  217 Moorpark 32
  156 Oxnard 0
  198 Santa Paula 34
Yolo 155 Bryte 66
  006 Davis 66
  196 Esparto 0
  226 Woodland 65
Yuba 084 Browns Valley 63
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