Our Research

Throughout Napa history, industry leaders, friends and neighbors shared successes of what was working in their vineyards and wineries to improve wine quality. Through continuous research and trials, we look forward to sharing our findings with you.

2018 & 2019 Research Trials

The current research trials focus on three main vineyard activities: pruning, leafing/removing laterals, and protecting fruit during heat events with cooling applications. Measurements were taken throughout the growing season including fruit maturity and ultimately were made into wine to evaluate impacts on wine quality.

Monthly Weather Summaries

Weather data from local stations throughout the Napa Valley is summarized in monthly updates as a way to highlight differences across the region and to compare the current vintage with previous years.

Click to Download Summaries

JOURNAL

NVVS JOURNAL

Edition 1

NVVS JOURNAL

Edition 2

NVVS JOURNAL

Edition 3

NVVS Journal

Edition 4

NVVS JOURNAL

Edition 5

RESEARCH DATA SUMMARIES

Data Sheet

St. Helena Pruning

Data Sheet

Rutherford Pruning

DATA SHEET

Leafing 

DATA SHEET

Cooling

RESEARCH REPORTS

RESearch Report

Cluster Thinning 

Research Report

Leafing 

Research Report

Smoke Taint Resources 

2024 WEATHER

Weather Summary

Winter 2024

Weather Summary

March 2024

Weather Summary

April 2024

Weather Summary

May 2024

Weather Summary

June 2024

2023 WEATHER

Weather Summary

Winter 2023

Weather Summary

March 2023

Weather Summary

April 2023

Weather Summary

May 2023

Weather Summary

June 2023

Weather Summary

July 2023

Weather Summary

August 2023

Weather Summary

September 2023

Weather Summary

October 2023

Weather Summary

Harvest Summary 2023

Weather Summary

November 2023

2022 WEATHER

Weather Summary

Winter 2022

Weather Summary

August 2022

Weather Summary

March 2022

Weather Summary

Labor Day Heat 2022

Weather Summary

April 2022

Weather Summary

September 2022

Weather Summary

May 2022

Weather Summary

October 2022

Weather Summary

June 2022

Weather Summary

Harvest Summary 2022

Weather Summary

July 2022

Weather Summary

November 2022

2021 WEATHER

Weather Summary

Winter 2021

WEATHER

 March 2021

WEATHER

 April 2021

WEATHER

 May 2021

WEATHER

 June 2021

WEATHER

 July 2021

WEATHER

   August 2021

WEATHER

September 2021

WEATHER EVENT

October Rain 2021

WEATHER

October 2021

WEATHER

November 2021

2020 WEATHER

Long Term

Weather Trends

WEATHER

 March 2020

WEATHER

April 2020

WEATHER

May 2020

WEATHER

June 2020

WEATHER

July 2020

WEATHER

August 2020

WEATHER EVENT

Labor Day Heat 2020

WEATHER

September 2020

WEATHER

October 2020

WEATHER

November 2020

2019 WEATHER

Weather Summary

Winter 2019

Weather

April 2019

Weather

May 2019

Weather

June 2019

Weather

July 2019

Weather

August 2019

Weather

September 2019

WEATHER

October 2019

WEATHER EVENT

Winds Oct 9&10

WEATHER

November 2019

Harvest Summary

2019