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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 125
  191 Pleasanton 111
  171 Union City 126
 
Butte 012 Durham 102
 
Colusa 032 Colusa 106
 
Contra Costa 047 Brentwood 99
  170 Concord 110
  178 Moraga 131
 
El Dorado 013 Camino 137
 
Fresno 007 Firebaugh/Telles 91
  190 Five Points South West 82
  002 FivePoints/WSFS USDA 91
  080 Fresno State 93
  142 Orange Cove 96
  124 Panoche 94
  039 Parlier 90
  105 Westlands 88
 
Glenn 061 Orland 100
 
Imperial 041 Calipatria/Mulberry 40
  087 Meloland 39
  175 Palo Verde II 49
  128 Salton Sea East 42
  127 Salton Sea West 31
  068 Seeley 33
  181 Westmorland North 45
 
Inyo 035 Bishop 110
  183 Owens Lake North 109
  189 Owens Lake South 99
 
Kern 125 Arvin-Edison 84
  146 Belridge 83
  054 Blackwells Corner 91
  138 Famoso 97
  005 Shafter/USDA 87
 
Kings 021 Kettleman 79
  015 Stratford 85
 
Lassen 057 Buntingville 140
 
Los Angeles 082 Claremont 0
  133 Glendale 82
  174 Long Beach 69
  159 Monrovia 60
  197 Palmdale 102
  078 Pomona 68
  204 Santa Clarita 70
  099 Santa Monica 65
 
Madera 145 Madera 101
 
Marin 187 Black Point 152
  157 Point San Pedro 131
 
Mendocino 085 Hopland FS 130
  106 Sanel Valley 125
 
Merced 092 Kesterson 92
  056 Los Banos 97
  148 Merced 105
 
Modoc 090 Alturas 141
 
Monterey 114 Arroyo Seco 123
  019 Castroville 154
  113 King City-Oasis Rd. 114
  129 Pajaro 127
  116 Salinas North 156
  089 Salinas South 134
 
Napa 109 Carneros 117
  077 Oakville 108
 
Orange 075 Irvine 58
 
Placer 195 Auburn 112
 
Riverside 135 Blythe NE 54
  118 Cathedral City 43
  200 Indio 2 44
  136 Oasis 42
  151 Ripley 50
  154 Salton Sea North 0
  062 Temecula 75
  137 Temecula East II 84
  044 U.C. Riverside 66
  179 Winchester 89
 
Sacramento 131 Fair Oaks 99
  140 Twitchell Island 110
 
San Benito 126 San Benito 116
  143 San Juan Valley 116
 
San Bernardino 134 Barstow NE 76
  199 Big Bear Lake 149
  192 Lake Arrowhead 139
  117 Victorville 93
 
San Diego 153 Escondido SPV 2
  173 La Jolla 85
  150 Miramar 98
  147 Otay Lake 63
  184 San Diego II 98
 
San Joaquin 166 Lodi West 102
  070 Manteca 100
  167 Tracy 104
 
San Luis Obispo 163 Atascadero 114
  202 Nipomo 114
  052 San Luis Obispo 93
  160 San Luis Obispo West 118
 
Santa Barbara 088 Cuyama 92
  094 Goleta Foothills 10
  107 Santa Barbara 38
  064 Santa Ynez 101
  165 Sisquoc 107
 
Santa Clara 132 Morgan Hill 114
 
Santa Cruz 104 De Laveaga 135
  111 Green Valley Road 122
 
Shasta 043 McArthur 140
 
Siskiyou 091 Tulelake FS 142
 
Solano 121 Dixon 114
  122 Hastings Tract 105
  123 Suisun Valley 105
  139 Winters 100
 
Sonoma 158 Bennett Valley 111
  144 Petaluma East 136
  083 Santa Rosa 126
  103 Windsor 120
 
Stanislaus 168 Denair 113
  071 Modesto 108
  194 Oakdale 108
  161 Patterson 100
 
Sutter 030 Nicolaus 108
 
Tehama 008 Gerber 108
 
Tulare 203 Alpaugh 92
  182 Delano 88
  086 Lindcove 7
  169 Porterville 96
 
Ventura 152 Camarillo 80
  156 Oxnard 94
  101 Piru 0
  198 Santa Paula 60
 
Yolo 155 Bryte 105
  006 Davis 107
  196 Esparto 81
  027 Zamora 0
 
Yuba 084 Browns Valley 105
 
 *  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

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