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 58
  171 Union City 81
Amador 227 Plymouth 77
Butte 012 Durham 66
Colusa 250 Williams 60
Contra Costa 047 Brentwood 59
  170 Concord 67
  213 El Cerrito 63
  178 Moraga 67
El Dorado 013 Camino 70
  228 Diamond Springs 71
Fresno 205 Coalinga 53
  007 Firebaugh/Telles 60
  190 Five Points South West 51
  002 FivePoints/WSFS USDA 54
  080 Fresno State 56
  142 Orange Cove 55
  124 Panoche 66
  039 Parlier 55
  105 Westlands 52
Imperial 041 Calipatria/Mulberry 13
  087 Meloland 8
  175 Palo Verde II 21
  128 Salton Sea East 0
  127 Salton Sea West 0
  068 Seeley 10
  201 UC-Andrade 0
  186 UC-San Luis 0
  181 Westmorland North 10
Inyo 035 Bishop 68
  183 Owens Lake North 69
  189 Owens Lake South 65
Kern 125 Arvin-Edison 51
  146 Belridge 47
  054 Blackwells Corner 61
  005 Shafter/USDA 54
Kings 021 Kettleman 0
  015 Stratford 50
Lassen 057 Buntingville 89
Los Angeles 216 Arleta 15
  215 Chatsworth 13
  133 Glendale 0
  174 Long Beach 11
  159 Monrovia 10
  197 Palmdale 48
  220 Palmdale Central 47
  078 Pomona 17
  204 Santa Clarita 16
  099 Santa Monica 10
  219 West Hills 13
Madera 145 Madera 0
  188 Madera II 65
Marin 187 Black Point 61
  157 Point San Pedro 64
Mendocino 085 Hopland FS 0
  106 Sanel Valley 65
Merced 092 Kesterson 61
  056 Los Banos 56
  148 Merced 63
Modoc 090 Alturas 93
Monterey 114 Arroyo Seco 45
  210 Carmel 48
  019 Castroville 74
  113 King City-Oasis Rd. 42
  193 Pacific Grove 58
  129 Pajaro 42
  116 Salinas North 53
  214 Salinas South II 47
Napa 109 Carneros 63
  077 Oakville 59
Orange 245 Coto de Caza 17
  075 Irvine 13
  241 San Clemente 25
Placer 195 Auburn 65
Riverside 135 Blythe NE 16
  118 Cathedral City 0
  239 Hemet 25
  200 Indio 2 7
  208 La Quinta II 16
  238 Moreno Valley 10
  136 Oasis 9
  240 Perris 17
  151 Ripley 22
  062 Temecula 11
  237 Temecula East III 13
  218 Thermal South 8
  044 U.C. Riverside 13
  179 Winchester 18
Sacramento 131 Fair Oaks 60
  140 Twitchell Island 60
San Benito 126 San Benito 46
  143 San Juan Valley 47
San Bernardino 134 Barstow NE 0
  199 Big Bear Lake 89
  233 Joshua Tree 38
  192 Lake Arrowhead 82
  234 Newberry Springs II 44
  117 Victorville 1
San Diego 207 Borrego Springs 10
  153 Escondido SPV 24
  150 Miramar 15
  147 Otay Lake 19
  184 San Diego II 12
  173 Torrey Pines 10
San Joaquin 166 Lodi West 0
  070 Manteca 62
  167 Tracy 0
San Luis Obispo 163 Atascadero 55
  202 Nipomo 30
  052 San Luis Obispo 13
  160 San Luis Obispo West 25
Santa Barbara 088 Cuyama 52
  094 Goleta Foothills 0
  231 Lompoc 42
  107 Santa Barbara 26
  230 Santa Barbara II 10
  232 Santa Maria II 30
  064 Santa Ynez 26
  165 Sisquoc 40
Santa Clara 211 Gilroy 46
Santa Cruz 104 De Laveaga 50
  209 Watsonville West II 58
Shasta 043 McArthur 94
  224 Shasta College 63
Siskiyou 236 Macdoel II 92
  225 Scott Valley 93
  091 Tulelake FS 95
Solano 121 Dixon 69
  212 Hastings Tract East 77
  139 Winters 64
Sonoma 158 Bennett Valley 64
  144 Petaluma East 88
  083 Santa Rosa 65
  103 Windsor 60
Stanislaus 206 Denair 62
  071 Modesto 63
  194 Oakdale 65
  161 Patterson 20
Sutter 235 Verona 63
Tehama 008 Gerber 0
  222 Gerber South 64
Tulare 203 Alpaugh 17
  182 Delano 16
  086 Lindcove 56
  169 Porterville 58
Ventura 152 Camarillo 22
  217 Moorpark 14
  156 Oxnard 0
  198 Santa Paula 10
Yolo 155 Bryte 65
  006 Davis 60
  196 Esparto 0
  226 Woodland 60
Yuba 084 Browns Valley 60
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