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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 105
  191 Pleasanton 107
  171 Union City 110
 
Butte 012 Durham 100
 
Colusa 032 Colusa 99
 
Contra Costa 047 Brentwood 72
  170 Concord 102
  178 Moraga 126
 
El Dorado 013 Camino 127
 
Fresno 007 Firebaugh/Telles 88
  190 Five Points South West 88
  002 FivePoints/WSFS USDA 91
  080 Fresno State 94
  142 Orange Cove 96
  124 Panoche 96
  039 Parlier 92
  105 Westlands 87
 
Glenn 061 Orland 95
 
Imperial 041 Calipatria/Mulberry 28
  087 Meloland 26
  175 Palo Verde II 38
  128 Salton Sea East 26
  127 Salton Sea West 21
  068 Seeley 22
  181 Westmorland North 24
 
Inyo 035 Bishop 102
  183 Owens Lake North 109
  189 Owens Lake South 96
 
Kern 125 Arvin-Edison 89
  146 Belridge 89
  054 Blackwells Corner 92
  138 Famoso 97
  005 Shafter/USDA 90
 
Kings 021 Kettleman 82
  015 Stratford 88
 
Lassen 057 Buntingville 136
 
Los Angeles 082 Claremont 0
  133 Glendale 56
  174 Long Beach 61
  159 Monrovia 53
  197 Palmdale 102
  078 Pomona 63
  204 Santa Clarita 51
  099 Santa Monica 53
 
Madera 145 Madera 98
 
Marin 187 Black Point 124
  157 Point San Pedro 135
 
Mendocino 085 Hopland FS 124
  106 Sanel Valley 112
 
Merced 092 Kesterson 94
  056 Los Banos 102
  148 Merced 100
 
Modoc 090 Alturas 149
 
Monterey 114 Arroyo Seco 99
  019 Castroville 4
  113 King City-Oasis Rd. 93
  129 Pajaro 110
  116 Salinas North 148
  089 Salinas South 130
 
Napa 109 Carneros 110
  077 Oakville 102
 
Orange 075 Irvine 49
 
Placer 195 Auburn 110
 
Riverside 135 Blythe NE 0
  118 Cathedral City 26
  200 Indio 2 23
  136 Oasis 28
  151 Ripley 45
  154 Salton Sea North 0
  062 Temecula 65
  137 Temecula East II 67
  044 U.C. Riverside 54
  179 Winchester 73
 
Sacramento 131 Fair Oaks 98
  140 Twitchell Island 106
 
San Benito 126 San Benito 104
  143 San Juan Valley 108
 
San Bernardino 134 Barstow NE 76
  199 Big Bear Lake 157
  192 Lake Arrowhead 145
  117 Victorville 94
 
San Diego 153 Escondido SPV 64
  173 La Jolla 64
  150 Miramar 67
  147 Otay Lake 54
  184 San Diego II 53
 
San Joaquin 166 Lodi West 102
  070 Manteca 102
  167 Tracy 96
 
San Luis Obispo 163 Atascadero 105
  202 Nipomo 130
  052 San Luis Obispo 89
  160 San Luis Obispo West 108
 
Santa Barbara 088 Cuyama 106
  094 Goleta Foothills 62
  107 Santa Barbara 78
  064 Santa Ynez 89
  165 Sisquoc 94
 
Santa Clara 132 Morgan Hill 22
 
Santa Cruz 104 De Laveaga 126
  111 Green Valley Road 111
 
Shasta 043 McArthur 137
 
Siskiyou 091 Tulelake FS 151
 
Solano 121 Dixon 86
  122 Hastings Tract 99
  123 Suisun Valley 100
  139 Winters 94
 
Sonoma 158 Bennett Valley 115
  144 Petaluma East 128
  083 Santa Rosa 126
  103 Windsor 122
 
Stanislaus 168 Denair 100
  071 Modesto 105
  194 Oakdale 103
  161 Patterson 98
 
Sutter 030 Nicolaus 105
 
Tehama 008 Gerber 99
 
Tulare 203 Alpaugh 94
  182 Delano 93
  086 Lindcove 89
  169 Porterville 96
 
Ventura 152 Camarillo 65
  156 Oxnard 75
  101 Piru 0
  198 Santa Paula 52
 
Yolo 155 Bryte 0
  006 Davis 108
  196 Esparto 76
  027 Zamora 0
 
Yuba 084 Browns Valley 100
 
 *  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
 *  About Growing Degree Hours (GDH)
 *  About Pomology Weather Services
 *  About Weather Stations
 *  Weather-related Links
 *  About Chilling