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:

RESEARCH DATA SUMMARIES

Data Sheet

St. Helena Pruning

Data Sheet

Rutherford Pruning

DATA SHEET

Leafing 

DATA SHEET

Cooling

RESearch Report

Cluster Thinning 

Research Report

Leafing 

Research Report

Smoke Taint Resources 

RESEARCH REPORTS

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

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