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Cumulative Chilling Portions

Chilling portion accumulations are provided from September 1 through August 31. Hourly temperatures are downloaded nightly for more than 100 CIMIS weather stations.

The table below reflects accumulated chilling portions using the Dynamic model calculation method.

  • To retrieve daily and historical chilling units, select a station name, below. Then specify calculation method and dates on the following pages.
  • If you need information about the location of a station, select a county name. A county map will be displayed, showing this symbol  red circle to designate a CIMIS weather station.

Cumulative Chilling Portions 

Link to county names:   A B C E F G I K L M N O P R S T V Y

County
Name
Station
Number
Station
Name
Portions
 
Alameda 149 Oakland Foothills 4
  191 Pleasanton 4
  171 Union City 7
 
Butte 012 Durham 4
 
Colusa 032 Colusa 3
 
Contra Costa 047 Brentwood 2
  170 Concord 3
  178 Moraga 9
 
El Dorado 013 Camino 16
 
Fresno 007 Firebaugh/Telles 2
  190 Five Points South West 2
  002 FivePoints/WSFS USDA 4
  080 Fresno State 4
  142 Orange Cove 4
  124 Panoche 1
  039 Parlier 4
  105 Westlands 1
 
Glenn 061 Orland 4
 
Imperial 041 Calipatria/Mulberry 0
  087 Meloland 0
  175 Palo Verde II 0
  128 Salton Sea East 0
  127 Salton Sea West 0
  068 Seeley 0
  181 Westmorland North 0
 
Inyo 035 Bishop 9
  183 Owens Lake North 7
  189 Owens Lake South 5
 
Kern 125 Arvin-Edison 4
  146 Belridge 3
  054 Blackwells Corner 5
  138 Famoso 5
  005 Shafter/USDA 3
 
Kings 021 Kettleman 1
  015 Stratford 3
 
Lassen 057 Buntingville 21
 
Los Angeles 082 Claremont 0
  133 Glendale 2
  174 Long Beach 0
  159 Monrovia 0
  197 Palmdale 6
  078 Pomona 1
  204 Santa Clarita 0
  099 Santa Monica 0
 
Madera 145 Madera 3
 
Marin 187 Black Point 3
  157 Point San Pedro 7
 
Mendocino 085 Hopland FS 8
  106 Sanel Valley 7
 
Merced 092 Kesterson 3
  056 Los Banos 3
  148 Merced 4
 
Modoc 090 Alturas 25
 
Monterey 114 Arroyo Seco 7
  019 Castroville 17
  113 King City-Oasis Rd. 7
  129 Pajaro 8
  116 Salinas North 23
  089 Salinas South 14
 
Napa 109 Carneros 5
  077 Oakville 5
 
Orange 075 Irvine 0
 
Placer 195 Auburn 4
 
Riverside 135 Blythe NE 1
  118 Cathedral City 0
  200 Indio 2 0
  136 Oasis 0
  151 Ripley 1
  154 Salton Sea North 0
  062 Temecula 3
  137 Temecula East II 2
  044 U.C. Riverside 0
  179 Winchester 2
 
Sacramento 131 Fair Oaks 4
  140 Twitchell Island 5
 
San Benito 126 San Benito 7
  143 San Juan Valley 7
 
San Bernardino 134 Barstow NE 3
  199 Big Bear Lake 23
  192 Lake Arrowhead 22
  117 Victorville 6
 
San Diego 153 Escondido SPV 2
  173 La Jolla 0
  150 Miramar 1
  147 Otay Lake 1
  184 San Diego II 0
 
San Joaquin 166 Lodi West 5
  070 Manteca 2
  167 Tracy 3
 
San Luis Obispo 163 Atascadero 6
  202 Nipomo 10
  052 San Luis Obispo 5
  160 San Luis Obispo West 6
 
Santa Barbara 088 Cuyama 5
  094 Goleta Foothills 0
  107 Santa Barbara 7
  064 Santa Ynez 5
  165 Sisquoc 7
 
Santa Clara 132 Morgan Hill 0
 
Santa Cruz 104 De Laveaga 9
  111 Green Valley Road 7
 
Shasta 043 McArthur 24
 
Siskiyou 091 Tulelake FS 27
 
Solano 121 Dixon 0
  122 Hastings Tract 0
  123 Suisun Valley 3
  139 Winters 3
 
Sonoma 158 Bennett Valley 10
  144 Petaluma East 9
  083 Santa Rosa 9
  103 Windsor 8
 
Stanislaus 168 Denair 0
  071 Modesto 5
  194 Oakdale 3
  161 Patterson 3
 
Sutter 030 Nicolaus 4
 
Tehama 008 Gerber 3
 
Tulare 203 Alpaugh 4
  182 Delano 4
  086 Lindcove 4
  169 Porterville 3
 
Ventura 152 Camarillo 2
  156 Oxnard 0
  101 Piru 0
  198 Santa Paula 0
 
Yolo 155 Bryte 3
  006 Davis 4
  196 Esparto 0
  027 Zamora 0
 
Yuba 084 Browns Valley 4
 
 *  Cumulative Chilling Hours
    Hours below 45°F
    Hours between 32°F and 45°F
    November 1 thru February 28/29
 *  Cumulative Chilling Portions
    Portions (Dynamic Model)
    September 1 through August 31
 *  Cumulative Chilling - Research
    Hours below 45°F
    Hours between 32°F and 45°F
    Units (Utah Model)
    September 1 through August 31
   *  Harvest Prediction Module
    for Peaches, Plums, and Nectarines
    February 1 through May 31
 *  Fruit & Nut Research and Information Center
 *  Weather-Related Models
 *  Harvest Prediction: About Growing Degree Hours