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  • About Us
    • 50th Anniversary
    • Mission & History
    • Board of Directors
    • Our Team
    • Grower of the Year >
      • About the Grower of the Year Award
    • Lifetime Achievement Award
    • Sponsorship
    • Fostering the Next Generation
    • In the News
    • Contact Us
  • Viticulture
    • Growing Season
    • Pests & Diseases
    • Soil Health >
      • Cover Crops
      • Compost
    • Vineyard Development
    • Water & Irrigation >
      • Groundwater Sustainability Plan
  • Environment
    • Air Quality >
      • Agricultural Burning
    • Ag Preserve >
      • Conservation Landscape
    • Climate Resilience >
      • Climate Video Series
      • Modern vs. Fossil CO2
      • Reduce Climate Impact
    • Wildfires
  • Resources
    • Best Practices
    • Directory
    • Grower Resources >
      • Crop Insurance
      • Financial Model
      • Tools for Grape Sales
      • Weather Alert
    • Industry Blog
    • Napa Winegrape Market
    • Podcast
    • Reports & Research >
      • Cost Studies
      • Grape Crush Report
      • Growing Conditions Report
      • Hang Time Study
      • Napa County Crop Report
      • Vineyard Trials
      • Wages & Benefits Survey
  • Events
    • Calendar
    • Past Presentations
    • Harvest STOMP®
    • Annual Celebration
    • Ahead of the Curve
  • Members
    • Member Portal
    • How to Join >
      • Growers
      • Vineyard Management Companies
      • Associates
  • Community
    • FOG Blog
    • FAQs
  • Donate
    • Our Donors
    • Your Impact
    • Ways to Give
    • Sip and Support Program
    • Our Growing Community

Growing Conditions Report

The Growing Conditions Report

The Growing Conditions Report (GCR), produced in cooperation with John Duckhorn of Picovale Services, Inc. Austin Peterson of OVID Napa Valley, Chris D’Alo of Nord Vineyard Services, Will Thomas of Foley Family Farms, and Cody Clark of Silverado Farming Company.

The report employs three simple and widely understood climate measurements known to influence grapevine development, ripening, and crop loads: growing degree days (GDD), total frost hours, and rainfall.

The GCR was started in 2010 with the intention of becoming a tool that would allow grape growers to compare conditions across vintages. Over time, a multi-year collection of reports will add to our understanding of regional climate conditions and help to identify climate trends.

The reports are available for NVG grower and vineyard manager members as a benefit of membership. If you are not a member and would like access to this or previous years' reports, please contact [email protected] to inquire about membership. 
Read the 2024 GCR
Access All Growing Condition Reports

GCR Video Series

​To celebrate our milestone of the GCR, we made a series of videos to recap the past decade of data, told through the experiences of fellow growers.
2022
2021
2020
 2019 - 2018
 2017 - 2016
2015 - 2014
2013 - 2012
2011 - 2010
Trade Resources: Speakers | Press | Sponsors
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831 Latour Court, Suite A  |  Napa, CA 94558
Phone: (707) 944-8311 | [email protected]
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Napa Valley Grapegrowers is a 501(c)3 public charity. Our federal tax ID number is # 82-2012860

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​Subscribe to Friends of the Grapegrowers (FOG) to receive exclusive updates, educational workshops, vineyard tours, special events, and a quarterly newsletter with insights into Napa Valley grape-growing, sustainability, climate initiatives, and the latest trends in viticulture.
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