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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 15
  191 Pleasanton 15
  171 Union City 17
 
Butte 012 Durham 14
 
Colusa 032 Colusa 15
 
Contra Costa 047 Brentwood 13
  170 Concord 13
  178 Moraga 21
 
El Dorado 013 Camino 30
 
Fresno 007 Firebaugh/Telles 11
  190 Five Points South West 11
  002 FivePoints/WSFS USDA 12
  080 Fresno State 16
  142 Orange Cove 15
  124 Panoche 10
  039 Parlier 14
  105 Westlands 10
 
Glenn 061 Orland 14
 
Imperial 041 Calipatria/Mulberry 1
  087 Meloland 1
  175 Palo Verde II 2
  128 Salton Sea East 0
  127 Salton Sea West 0
  068 Seeley 0
  181 Westmorland North 0
 
Inyo 035 Bishop 19
  183 Owens Lake North 20
  189 Owens Lake South 16
 
Kern 125 Arvin-Edison 12
  146 Belridge 11
  054 Blackwells Corner 14
  138 Famoso 14
  005 Shafter/USDA 12
 
Kings 021 Kettleman 10
  015 Stratford 9
 
Lassen 057 Buntingville 33
 
Los Angeles 082 Claremont 0
  133 Glendale 7
  174 Long Beach 4
  159 Monrovia 2
  197 Palmdale 14
  078 Pomona 4
  204 Santa Clarita 0
  099 Santa Monica 2
 
Madera 145 Madera 13
 
Marin 187 Black Point 15
  157 Point San Pedro 18
 
Mendocino 085 Hopland FS 20
  106 Sanel Valley 18
 
Merced 092 Kesterson 12
  056 Los Banos 12
  148 Merced 14
 
Modoc 090 Alturas 35
 
Monterey 114 Arroyo Seco 16
  019 Castroville 28
  113 King City-Oasis Rd. 17
  129 Pajaro 17
  116 Salinas North 34
  089 Salinas South 23
 
Napa 109 Carneros 15
  077 Oakville 16
 
Orange 075 Irvine 0
 
Placer 195 Auburn 16
 
Riverside 135 Blythe NE 2
  118 Cathedral City 1
  200 Indio 2 0
  136 Oasis 0
  151 Ripley 4
  154 Salton Sea North 0
  062 Temecula 5
  137 Temecula East II 6
  044 U.C. Riverside 2
  179 Winchester 6
 
Sacramento 131 Fair Oaks 14
  140 Twitchell Island 16
 
San Benito 126 San Benito 16
  143 San Juan Valley 18
 
San Bernardino 134 Barstow NE 7
  199 Big Bear Lake 34
  192 Lake Arrowhead 34
  117 Victorville 13
 
San Diego 153 Escondido SPV 5
  173 La Jolla 2
  150 Miramar 4
  147 Otay Lake 3
  184 San Diego II 1
 
San Joaquin 166 Lodi West 14
  070 Manteca 12
  167 Tracy 11
 
San Luis Obispo 163 Atascadero 14
  202 Nipomo 17
  052 San Luis Obispo 10
  160 San Luis Obispo West 15
 
Santa Barbara 088 Cuyama 16
  094 Goleta Foothills 0
  107 Santa Barbara 13
  064 Santa Ynez 12
  165 Sisquoc 13
 
Santa Clara 132 Morgan Hill 0
 
Santa Cruz 104 De Laveaga 18
  111 Green Valley Road 16
 
Shasta 043 McArthur 36
 
Siskiyou 091 Tulelake FS 39
 
Solano 121 Dixon 5
  122 Hastings Tract 0
  123 Suisun Valley 14
  139 Winters 13
 
Sonoma 158 Bennett Valley 21
  144 Petaluma East 19
  083 Santa Rosa 20
  103 Windsor 19
 
Stanislaus 168 Denair 0
  071 Modesto 17
  194 Oakdale 12
  161 Patterson 13
 
Sutter 030 Nicolaus 16
 
Tehama 008 Gerber 14
 
Tulare 203 Alpaugh 12
  182 Delano 12
  086 Lindcove 12
  169 Porterville 14
 
Ventura 152 Camarillo 7
  156 Oxnard 3
  101 Piru 0
  198 Santa Paula 5
 
Yolo 155 Bryte 14
  006 Davis 15
  196 Esparto 8
  027 Zamora 0
 
Yuba 084 Browns Valley 14
 
 *  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