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Napa County Growing Degree Days
View Daily Biomet Summary on Forecast (Current) 2026 GDD 2025 GDD 2024 GDD 2023 GDD 2022 GDD 2021 GDD 2020 GDD 2019 GDD

2026 GDD Napa

4/1/2026 - 11/15/2026

Daily Data | America/Los_Angeles
as of 6/3/26 2:00 PM PDT
Date Carneros Lower (Ranch 81) Oakville-NE (Ranch 88) Suscol Lower (Ranch 35) St. Helena-North
6/2/26 10.6 14.4 9.8 17.9
6/1/26 16.7 19.9 16.4 21.0
5/31/26 14.9 16.7 14.9 18.2
5/30/26 11.0 13.0 10.4 13.7
5/29/26 9.4 12.6 9.5 13.2
5/28/26 10.6 11.1 10.9 11.3
5/27/26 9.9 9.3 9.6 8.7
5/26/26 9.7 9.2 8.5 10.1
5/25/26 7.5 9.3 6.6 8.3
5/24/26 10.4 12.2 9.0 11.6
5/23/26 10.7 12.5 9.3 13.1
5/22/26 8.8 13.2 8.4 14.9
5/21/26 14.1 19.2 14.6 20.8
5/20/26 16.0 19.1 16.0 21.1
5/19/26 18.7 19.4 18.7 21.7
5/18/26 20.3 20.6 20.4 22.2
5/17/26 14.5 14.6 13.3 16.5
5/16/26 14.2 16.1 12.6 16.7
5/15/26 14.4 17.2 13.0 19.1
5/14/26 12.5 14.3 11.7 17.2
5/13/26 12.3 13.6 11.6 15.8
5/12/26 9.3 11.9 8.3 13.3
5/11/26 14.3 16.3 13.8 17.8
5/10/26 8.6 11.5 8.8 13.5
5/9/26 10.7 13.4 10.5 16.1
5/8/26 9.9 12.0 8.6 13.9
5/7/26 8.5 11.5 8.3 13.2
5/6/26 11.1 13.9 11.1 14.7
5/5/26 7.7 8.9 7.5 9.0
5/4/26 5.8 5.3 5.2 6.0
5/3/26 7.6 8.1 6.9 8.4
5/2/26 6.7 8.2 6.1 8.6
5/1/26 6.9 9.5 7.2 10.6
4/30/26 8.6 11.5 8.2 13.3
4/29/26 8.9 12.4 8.8 13.4
4/28/26 8.7 10.1 8.2 10.4
4/27/26 6.4 7.0 5.9 6.6
4/26/26 5.3 4.6 4.6 4.7
4/25/26 4.0 4.0 3.5 3.6
4/24/26 5.6 7.2 5.3 7.7
4/23/26 8.2 9.8 8.5 9.4
4/22/26 4.4 5.7 4.7 4.8
4/21/26 5.2 5.2 5.2 4.2
4/20/26 4.5 3.6 4.8 2.7
4/19/26 8.5 10.1 8.3 9.8
4/18/26 11.3 12.4 11.1 11.8
4/17/26 11.4 12.4 10.8 13.2
4/16/26 10.5 10.3 10.6 10.9
4/15/26 6.2 7.2 5.7 8.0
4/14/26 5.2 6.3 5.0 6.3
4/13/26 5.7 6.7 5.7 6.7
4/12/26 2.5 3.9 2.7 2.2
4/11/26 3.0 3.7 4.2 3.2
4/10/26 6.5 6.8 7.3 6.1
4/9/26 10.2 10.3 10.0 10.4
4/8/26 10.8 12.7 10.5 13.3
4/7/26 7.3 9.3 6.8 10.3
4/6/26 6.6 9.7 6.9 11.2
4/5/26 14.8 16.2 15.0 16.1
4/4/26 11.8 14.6 13.4 14.5
4/3/26 11.4 12.7 11.6 12.9
4/2/26 5.2 6.3 5.6 6.1
4/1/26 6.0 5.6 6.0 4.9