The tables below show the accumulated chill hours so far for 2020-2021 in Yuba City, as well as historical chill data. They will be updated weekly – bookmark this page for future reference.
For more information on differences between chill models, read about calculating winter chill. Chill accumulation, calculated from CIMIS stations around the state, can be tracked using the UC Fruit and Nut Center chill accumulation models. Janine Hasey provides these data from Yuba City because there is no local CIMIS station.
Table 1. Chill hours accumulated in Yuba City since November 11, 2020, using two different chill models.
| Chill Model | ||
| Date | 45° model | Hrs between 32° - 45° model |
| 11/11/20 | 87 | -- |
| 11/12/20 | 89 | -- |
| 11/21/20 | 109 | - |
| 11/28/20 | 171 | 171 |
| 12/12/20 | 317 | 317 |
| 12/19/20 | 388 | 388 |
| 12/27/20 | 493 | 492 |
| 01/02/21 | 544 | 543 |
| 01/09/21 | 604 | 603 |
| 01/17/21 | 663 | 662 |
| 01/23/21 | 692 | 690 |
| 01/31/21 | 774 | 769 |
| 02/07/21 | 822 | 817 |
| 02/13/21 | 834 | 829 |
| 2/24/21 | 850 | 845 |
| 3/1/21 | 894 | 889 |
Table 2. Historical chill hours in Yuba City.
| Year | Accumulated chill (45°F model) from Nov 1 until Mar 1 |
| 2019-20 | 815 |
| 2018-19 | 797 |
| 2017-18 | 811 |
| 2016-17 | 969 |
| 2015-16 | 762 |
| 2014-15 | 486 |
| 2013-14 | 1016 |
| 2012-13 | 1150 |
| 2011-12 | 1051 |
| 2010-11 | 1014 |
| 2009-10 | 854 |
| 2008-09 | 1116 |
| 2007-08 | 1108 |
| 2005-06 | 780 |
| 2004-05 | 994 |
| 2003-04 | 886 |
| 2002-03 | 779 |
| 2001-02 | 761 |
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