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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 9/2/26 12:42 PM PDT
Date Carneros Lower (Ranch 81) Oakville-NE (Ranch 88) Suscol Lower (Ranch 35) St. Helena-North
9/1/26 14.6 14.6 13.6 14.2
8/31/26 12.1 13.6 12.2 13.8
8/30/26 10.5 13.7 11.5 15.3
8/29/26 11.9 13.7 12.3 15.4
8/28/26 14.0 13.8 13.4 16.0
8/27/26 19.4 21.4 19.6 26.6
8/26/26 18.1 20.1 17.7 23.2
8/25/26 18.7 20.2 16.5 22.8
8/24/26 14.8 19.3 14.4 21.1
8/23/26 16.8 20.2 17.6 23.6
8/22/26 16.7 17.7 15.6 20.8
8/21/26 16.3 17.9 14.9 21.6
8/20/26 14.7 15.7 12.9 19.1
8/19/26 13.2 17.3 13.6 19.4
8/18/26 13.9 17.3 13.4 19.8
8/17/26 13.8 18.2 13.3 20.1
8/16/26 14.0 17.7 13.9 19.7
8/15/26 14.1 15.8 13.3 17.0
8/14/26 12.9 14.0 12.8 14.5
8/13/26 12.7 13.8 12.3 15.1
8/12/26 12.8 15.1 11.8 18.2
8/11/26 11.8 16.1 12.1 19.2
8/10/26 12.3 17.4 13.6 18.9
8/9/26 15.3 18.7 15.0 22.5
8/8/26 13.6 17.3 13.0 19.2
8/7/26 15.0 17.8 13.2 21.6
8/6/26 15.9 18.0 13.8 22.5
8/5/26 16.3 18.4 15.0 22.2
8/4/26 16.2 20.7 16.2 23.6
8/3/26 20.4 24.2 19.5 27.6
8/2/26 20.4 24.1 20.6 28.0
8/1/26 17.6 22.1 18.5 25.5
7/31/26 16.8 19.8 17.2 22.9
7/30/26 16.0 18.1 16.3 21.5
7/29/26 16.0 19.3 16.9 22.6
7/28/26 17.0 19.4 17.2 22.3
7/27/26 16.1 18.1 15.9 21.0
7/26/26 17.8 18.0 15.3 21.8
7/25/26 18.9 19.9 17.5 24.1
7/24/26 17.8 18.1 15.4 22.0
7/23/26 18.2 18.9 16.5 23.6
7/22/26 19.1 20.4 18.1 20.7
7/21/26 26.0 28.0 25.1 29.9
7/20/26 18.4 21.7 17.6 23.2
7/19/26 14.0 16.7 12.9 20.0
7/18/26 13.0 16.3 12.4 18.6
7/17/26 12.1 15.9 12.7 17.4
7/16/26 18.5 19.6 17.0 23.7
7/15/26 23.4 25.3 22.4 30.6
7/14/26 26.9 29.2 25.7 32.1
7/13/26 23.2 26.1 22.2 28.0
7/12/26 19.1 22.5 19.0 24.2
7/11/26 14.4 17.1 13.0 19.0
7/10/26 12.1 16.3 11.4 17.9
7/9/26 13.3 17.4 13.7 20.0
7/8/26 11.5 15.3 10.8 16.8
7/7/26 12.1 13.6 10.1 14.6
7/6/26 12.2 14.9 11.2 17.3
7/5/26 12.1 15.4 10.7 17.5
7/4/26 11.9 16.6 12.0 18.7
7/3/26 13.5 16.8 12.3 20.4
7/2/26 12.4 14.4 10.6 17.0
7/1/26 10.6 14.4 11.1 15.0
6/30/26 11.7 14.7 11.9 16.7
6/29/26 16.9 19.1 16.6 20.3
6/28/26 17.0 18.0 16.4 19.4
6/27/26 16.3 18.0 14.9 18.8
6/26/26 14.2 16.5 13.8 18.1
6/25/26 12.8 15.1 11.0 17.7
6/24/26 11.9 13.7 10.1 16.9
6/23/26 12.1 14.8 10.5 17.7
6/22/26 11.8 14.7 10.9 16.9
6/21/26 12.4 15.2 11.2 17.1
6/20/26 17.3 18.6 15.7 18.6
6/19/26 15.3 15.8 14.0 14.5
6/18/26 15.5 16.7 13.6 16.0
6/17/26 15.2 17.1 13.2 17.2
6/16/26 14.7 17.5 12.8 19.9
6/15/26 15.4 17.9 13.0 21.7
6/14/26 15.9 18.8 13.9 21.4
6/13/26 16.0 20.8 14.9 24.2
6/12/26 20.5 23.6 19.1 26.3
6/11/26 23.3 33.1 24.2 35.6
6/10/26 22.4 24.2 21.9 27.9
6/9/26 17.8 19.4 16.6 20.9
6/8/26 12.0 13.7 11.2 15.5
6/7/26 13.2 15.9 12.6 16.6
6/6/26 13.4 14.8 12.6 18.9
6/5/26 16.6 19.9 16.4 23.9
6/4/26 14.7 18.3 14.8 21.6
6/3/26 15.1 18.6 14.6 21.3
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