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Grape Growing Degree-Days for California |
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| Last Update: October 12, 2009 |
Next Update: March 2010 |
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| Growing Degree-Day accumulations are a reasonably good predictor for the rate of grapevine growth during the season and the level of fruit maturity in the fall. Shown below are the season to date Growing Degree-Days starting March 15 for several grape-growing areas in California. | |||||||
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From March 15 to update date. |
Compared to "Normal" 2009 is | ||||||
| Normal | 2008 | 2009 | Ahead (+), Behind (-) | ||||
| North Valley | |||||||
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Manteca (CIMIS 070) |
3612 | 3716 | 3721 | +8 days | |||
| Central Valley | |||||||
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Parlier (CIMIS 039) |
4313 | 4503 | 4539 | +14 days | |||
| South Valley | |||||||
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Shafter (CIMIS 005) |
4422 | 4575 | 4493 | +4 days | |||
| North Coast | |||||||
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Oakville (CIMIS 077) |
3002 | 3083 | 2990 | -1 day | |||
| Central Coast | |||||||
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Atascadero (CIMIS 163) |
3390 | 3140 | 3043 | -26 days | |||
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