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 55
  171 Union City 79
Amador 227 Plymouth 75
Butte 012 Durham 63
Colusa 250 Williams 58
Contra Costa 047 Brentwood 58
  170 Concord 65
  213 El Cerrito 59
  178 Moraga 65
El Dorado 013 Camino 69
  228 Diamond Springs 68
Fresno 205 Coalinga 52
  007 Firebaugh/Telles 58
  190 Five Points South West 49
  002 FivePoints/WSFS USDA 52
  080 Fresno State 54
  142 Orange Cove 53
  124 Panoche 64
  039 Parlier 52
  105 Westlands 50
Imperial 041 Calipatria/Mulberry 12
  087 Meloland 7
  175 Palo Verde II 20
  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 66
  183 Owens Lake North 67
  189 Owens Lake South 63
Kern 125 Arvin-Edison 49
  146 Belridge 45
  054 Blackwells Corner 59
  005 Shafter/USDA 52
Kings 021 Kettleman 0
  015 Stratford 48
Lassen 057 Buntingville 88
Los Angeles 216 Arleta 13
  215 Chatsworth 11
  133 Glendale 0
  174 Long Beach 10
  159 Monrovia 9
  197 Palmdale 45
  220 Palmdale Central 45
  078 Pomona 15
  204 Santa Clarita 14
  099 Santa Monica 8
  219 West Hills 11
Madera 145 Madera 0
  188 Madera II 62
Marin 187 Black Point 58
  157 Point San Pedro 61
Mendocino 085 Hopland FS 0
  106 Sanel Valley 63
Merced 092 Kesterson 60
  056 Los Banos 53
  148 Merced 61
Modoc 090 Alturas 93
Monterey 114 Arroyo Seco 43
  210 Carmel 46
  019 Castroville 72
  113 King City-Oasis Rd. 40
  193 Pacific Grove 55
  129 Pajaro 41
  116 Salinas North 51
  214 Salinas South II 45
Napa 109 Carneros 60
  077 Oakville 56
Orange 245 Coto de Caza 15
  075 Irvine 12
  241 San Clemente 23
Placer 195 Auburn 63
Riverside 135 Blythe NE 15
  118 Cathedral City 0
  239 Hemet 23
  200 Indio 2 6
  208 La Quinta II 15
  238 Moreno Valley 8
  136 Oasis 9
  240 Perris 15
  151 Ripley 21
  062 Temecula 9
  237 Temecula East III 12
  218 Thermal South 7
  044 U.C. Riverside 11
  179 Winchester 16
Sacramento 131 Fair Oaks 59
  140 Twitchell Island 58
San Benito 126 San Benito 44
  143 San Juan Valley 46
San Bernardino 134 Barstow NE 0
  199 Big Bear Lake 88
  233 Joshua Tree 36
  192 Lake Arrowhead 81
  234 Newberry Springs II 42
  117 Victorville 1
San Diego 207 Borrego Springs 9
  153 Escondido SPV 23
  150 Miramar 14
  147 Otay Lake 18
  184 San Diego II 11
  173 Torrey Pines 8
San Joaquin 166 Lodi West 0
  070 Manteca 60
  167 Tracy 0
San Luis Obispo 163 Atascadero 53
  202 Nipomo 27
  052 San Luis Obispo 12
  160 San Luis Obispo West 23
Santa Barbara 088 Cuyama 51
  094 Goleta Foothills 0
  231 Lompoc 39
  107 Santa Barbara 24
  230 Santa Barbara II 10
  232 Santa Maria II 28
  064 Santa Ynez 24
  165 Sisquoc 37
Santa Clara 211 Gilroy 44
Santa Cruz 104 De Laveaga 48
  209 Watsonville West II 55
Shasta 043 McArthur 93
  224 Shasta College 61
Siskiyou 236 Macdoel II 92
  225 Scott Valley 91
  091 Tulelake FS 94
Solano 121 Dixon 66
  212 Hastings Tract East 74
  139 Winters 61
Sonoma 158 Bennett Valley 61
  144 Petaluma East 86
  083 Santa Rosa 63
  103 Windsor 58
Stanislaus 206 Denair 61
  071 Modesto 61
  194 Oakdale 62
  161 Patterson 20
Sutter 235 Verona 61
Tehama 008 Gerber 0
  222 Gerber South 61
Tulare 203 Alpaugh 17
  182 Delano 13
  086 Lindcove 54
  169 Porterville 57
Ventura 152 Camarillo 20
  217 Moorpark 12
  156 Oxnard 0
  198 Santa Paula 9
Yolo 155 Bryte 63
  006 Davis 57
  196 Esparto 0
  226 Woodland 58
Yuba 084 Browns Valley 58
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