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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 66
  191 Pleasanton 63
  171 Union City 67
 
Amador 227 Plymouth 82
 
Butte 012 Durham 3
 
Colusa 032 Colusa 71
 
Contra Costa 047 Brentwood 68
  170 Concord 69
  178 Moraga 75
 
El Dorado 013 Camino 81
  228 Diamond Springs 78
 
Fresno 205 Coalinga 67
  007 Firebaugh/Telles 67
  190 Five Points South West 61
  002 FivePoints/WSFS USDA 68
  080 Fresno State 64
  142 Orange Cove 65
  124 Panoche 65
  039 Parlier 66
  105 Westlands 63
 
Imperial 041 Calipatria/Mulberry 29
  087 Meloland 23
  175 Palo Verde II 35
  128 Salton Sea East 20
  127 Salton Sea West 21
  068 Seeley 12
  201 UC-Andrade 25
  186 UC-San Luis 23
  181 Westmorland North 24
 
Inyo 035 Bishop 73
  183 Owens Lake North 79
  189 Owens Lake South 73
 
Kern 125 Arvin-Edison 61
  146 Belridge 61
  054 Blackwells Corner 64
  138 Famoso 68
  005 Shafter/USDA 61
 
Kings 021 Kettleman 64
  015 Stratford 64
 
Lassen 057 Buntingville 77
 
Los Angeles 216 Arleta 38
  215 Chatsworth 33
  133 Glendale 50
  174 Long Beach 41
  159 Monrovia 32
  197 Palmdale 68
  220 Palmdale Central 64
  078 Pomona 40
  204 Santa Clarita 41
  099 Santa Monica 28
  219 West Hills 31
 
Madera 145 Madera 68
 
Marin 187 Black Point 71
  157 Point San Pedro 72
 
Mendocino 085 Hopland FS 75
  106 Sanel Valley 72
 
Merced 092 Kesterson 69
  056 Los Banos 69
  148 Merced 68
 
Modoc 090 Alturas 81
 
Monterey 114 Arroyo Seco 65
  210 Carmel 76
  019 Castroville 80
  113 King City-Oasis Rd. 64
  193 Pacific Grove 5
  129 Pajaro 62
  116 Salinas North 73
  089 Salinas South 68
 
Napa 109 Carneros 67
  077 Oakville 64
 
Orange 075 Irvine 36
 
Placer 195 Auburn 71
 
Riverside 135 Blythe NE 44
  118 Cathedral City 20
  200 Indio 2 17
  208 La Quinta II 29
  136 Oasis 22
  151 Ripley 42
  062 Temecula 35
  218 Thermal South 28
  044 U.C. Riverside 37
  179 Winchester 54
 
Sacramento 131 Fair Oaks 69
  140 Twitchell Island 72
 
San Benito 126 San Benito 63
  143 San Juan Valley 67
 
San Bernardino 134 Barstow NE 61
  199 Big Bear Lake 84
  192 Lake Arrowhead 80
  117 Victorville 64
 
San Diego 207 Borrego Springs 29
  153 Escondido SPV 43
  173 La Jolla 115
  150 Miramar 49
  147 Otay Lake 39
  184 San Diego II 37
 
San Joaquin 166 Lodi West 71
  070 Manteca 68
  167 Tracy 70
 
San Luis Obispo 163 Atascadero 66
  202 Nipomo 74
  052 San Luis Obispo 49
  160 San Luis Obispo West 60
 
Santa Barbara 088 Cuyama 65
  094 Goleta Foothills 26
  231 Lompoc 66
  107 Santa Barbara 49
  230 Santa Barbara II 39
  232 Santa Maria II 61
  064 Santa Ynez 53
  165 Sisquoc 57
 
Santa Clara 211 Gilroy 62
 
Santa Cruz 104 De Laveaga 72
  209 Watsonville West II 81
 
Shasta 043 McArthur 82
 
Siskiyou 091 Tulelake FS 86
 
Solano 121 Dixon 70
  212 Hastings Tract East 66
  139 Winters 64
 
Sonoma 158 Bennett Valley 75
  144 Petaluma East 73
  083 Santa Rosa 70
  103 Windsor 72
 
Stanislaus 206 Denair 72
  071 Modesto 74
  194 Oakdale 46
  161 Patterson 71
 
Tehama 008 Gerber 71
 
Tulare 203 Alpaugh 64
  086 Lindcove 62
  169 Porterville 70
 
Ventura 152 Camarillo 59
  156 Oxnard 50
  198 Santa Paula 31
 
Yolo 155 Bryte 73
  006 Davis 70
  196 Esparto 58
  226 Woodland 68
 
Yuba 084 Browns Valley 67
 
 *  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