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 59
  171 Union City 81
Amador 227 Plymouth 78
Butte 012 Durham 66
Colusa 250 Williams 61
Contra Costa 047 Brentwood 60
  170 Concord 68
  213 El Cerrito 63
  178 Moraga 68
El Dorado 013 Camino 72
  228 Diamond Springs 72
Fresno 205 Coalinga 54
  007 Firebaugh/Telles 61
  190 Five Points South West 52
  002 FivePoints/WSFS USDA 54
  080 Fresno State 56
  142 Orange Cove 56
  124 Panoche 66
  039 Parlier 55
  105 Westlands 53
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 69
  183 Owens Lake North 70
  189 Owens Lake South 66
Kern 125 Arvin-Edison 51
  146 Belridge 47
  054 Blackwells Corner 63
  005 Shafter/USDA 54
Kings 021 Kettleman 0
  015 Stratford 50
Lassen 057 Buntingville 91
Los Angeles 216 Arleta 16
  215 Chatsworth 13
  133 Glendale 0
  174 Long Beach 12
  159 Monrovia 11
  197 Palmdale 49
  220 Palmdale Central 48
  078 Pomona 17
  204 Santa Clarita 17
  099 Santa Monica 11
  219 West Hills 14
Madera 145 Madera 0
  188 Madera II 65
Marin 187 Black Point 62
  157 Point San Pedro 65
Mendocino 085 Hopland FS 0
  106 Sanel Valley 67
Merced 092 Kesterson 62
  056 Los Banos 56
  148 Merced 64
Modoc 090 Alturas 93
Monterey 114 Arroyo Seco 46
  210 Carmel 49
  019 Castroville 75
  113 King City-Oasis Rd. 43
  193 Pacific Grove 58
  129 Pajaro 44
  116 Salinas North 53
  214 Salinas South II 47
Napa 109 Carneros 63
  077 Oakville 59
Orange 245 Coto de Caza 17
  075 Irvine 14
  241 San Clemente 25
Placer 195 Auburn 65
Riverside 135 Blythe NE 17
  118 Cathedral City 0
  239 Hemet 26
  200 Indio 2 8
  208 La Quinta II 16
  238 Moreno Valley 11
  136 Oasis 9
  240 Perris 17
  151 Ripley 24
  062 Temecula 12
  237 Temecula East III 13
  218 Thermal South 9
  044 U.C. Riverside 13
  179 Winchester 19
Sacramento 131 Fair Oaks 62
  140 Twitchell Island 60
San Benito 126 San Benito 46
  143 San Juan Valley 48
San Bernardino 134 Barstow NE 0
  199 Big Bear Lake 89
  233 Joshua Tree 39
  192 Lake Arrowhead 83
  234 Newberry Springs II 44
  117 Victorville 1
San Diego 207 Borrego Springs 11
  153 Escondido SPV 25
  150 Miramar 16
  147 Otay Lake 20
  184 San Diego II 13
  173 Torrey Pines 10
San Joaquin 166 Lodi West 0
  070 Manteca 62
  167 Tracy 0
San Luis Obispo 163 Atascadero 56
  202 Nipomo 30
  052 San Luis Obispo 14
  160 San Luis Obispo West 26
Santa Barbara 088 Cuyama 54
  094 Goleta Foothills 0
  231 Lompoc 42
  107 Santa Barbara 27
  230 Santa Barbara II 10
  232 Santa Maria II 31
  064 Santa Ynez 26
  165 Sisquoc 41
Santa Clara 211 Gilroy 46
Santa Cruz 104 De Laveaga 52
  209 Watsonville West II 59
Shasta 043 McArthur 95
  224 Shasta College 64
Siskiyou 236 Macdoel II 93
  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 89
  083 Santa Rosa 66
  103 Windsor 61
Stanislaus 206 Denair 63
  071 Modesto 64
  194 Oakdale 66
  161 Patterson 20
Sutter 235 Verona 64
Tehama 008 Gerber 0
  222 Gerber South 64
Tulare 203 Alpaugh 17
  182 Delano 17
  086 Lindcove 56
  169 Porterville 59
Ventura 152 Camarillo 22
  217 Moorpark 15
  156 Oxnard 0
  198 Santa Paula 10
Yolo 155 Bryte 66
  006 Davis 60
  196 Esparto 0
  226 Woodland 60
Yuba 084 Browns Valley 61
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