Calculators

Cumulative Chilling Hours:
Cumulative Chill Hours and
Modified Chill Hours
Hours below 45° F
Hours between 32 F and 45° F
November 1 through February 28/29.

Cumulative Chilling Portions:
Dynamic Model
September 1 through August 31

Chilling Hour & Unit Accumulations:
Historic Accumulation of
Chill Hours, Modified Chill Hours,
& Chill Units (Utah Model)
Hours below 45° F
Hours between 32° F and 45° F
September 1 through August 31

Harvest Prediction Model:
for Peaches, Plums and Nectarines

Chilling Hour & Unit Accumulations

CIMIS weather station: Gerber (#8 - Tehama County)
Reporting Dates	Current Season Historical Accumulations
Start Date
End Date
Calculation Method	Hours below 45°F Hours between 32°F and 45°F Units (Utah model)