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Powdery Mildew Stress Points
2026 (Current) 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007
Daily Powdery Mildew Stress Activation Hours
Daily Activation Hours (70-85°)

Powdery Mildew Stress Points - 2026

3/1/2026 - 11/15/2026

Daily Data
as of 4/3/26 12:17 AM PDT
Date Middletown (Diamond D) Red Hills (Beckstoffer) Ridgeline Top (Brassfield) Ridgeline Low (Brassfield) High Valley Winery High Valley Ridgeline (Brassfield) Bell Hill-West Lower Lake Middletown-West (Domaine Helena) Morgan Valley Kelseyville (Clark Drive) Kelseyville Kelseyville Remote Lower Bohn Middletown-South Ukiah-SE (Ruddick) Smith Lane (Kelseyville-South) Scotts Valley Upper Bohn-North Snell Peak Blk#9 Upper Lake Wight Way (Adobe Creek)
4/1/26 80 70 70 70 50 70 70 70 70 70 70 70 70 80 70 80 70 70 80 80 70 70
3/31/26 90 80 80 80 60 80 80 80 80 80 80 80 80 90 80 90 80 80 90 90 80 80
3/30/26 100 90 90 90 70 90 90 90 90 90 90 90 90 100 90 100 90 90 100 100 90 90
3/29/26 100 100 100 100 80 100 100 100 100 100 100 100 100 100 100 90 100 100 100 90 100 100
3/28/26 100 100 90 100 60 100 100 100 100 100 100 100 100 90 100 70 100 100 90 100 100 100
3/27/26 100 80 70 100 0 80 80 100 100 100 80 80 100 100 100 80 100 100 100 100 80 100
3/26/26 100 60 80 100 0 60 60 100 100 80 60 60 90 100 100 60 90 100 100 100 60 100
3/25/26 100 70 90 90 0 70 70 100 100 90 70 70 100 100 100 70 100 100 100 100 70 100
3/24/26 100 80 100 100 0 80 80 80 100 100 80 80 80 - 100 80 80 80 90 100 80 100
3/23/26 90 60 90 90 0 90 60 60 90 90 60 60 60 - 90 60 60 60 70 80 60 90
3/22/26 70 0 100 100 0 100 0 0 70 100 0 0 0 - 70 0 0 0 50 60 0 70
3/21/26 50 0 100 100 0 100 0 0 50 100 0 0 0 - 50 0 0 0 30 40 0 50
3/20/26 60 0 100 90 0 100 0 0 30 100 0 0 0 - 30 0 0 0 40 50 0 30
3/19/26 70 0 100 100 0 100 0 0 40 100 0 0 0 - 40 0 0 0 50 60 0 40
3/18/26 80 0 80 80 0 80 0 0 50 80 0 0 0 - 50 0 0 0 60 70 0 50
3/17/26 90 0 60 60 0 60 0 0 60 60 0 0 0 - 60 0 0 0 70 80 0 60
3/16/26 100 0 0 0 0 0 0 0 70 0 0 0 0 - 70 0 0 0 80 90 0 70
3/15/26 100 0 0 0 0 0 0 0 80 0 0 0 0 - 80 0 0 0 90 100 0 80
3/14/26 80 0 0 0 0 0 0 0 60 0 0 0 0 - 60 0 0 0 100 100 0 60
3/13/26 60 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 100 80 0 0
3/12/26 40 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 90 60 0 0
3/11/26 50 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 70 40 0 0
3/10/26 60 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 50 50 0 0
3/9/26 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 60 60 0 0
3/8/26 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0
3/7/26 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0
3/6/26 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0
3/5/26 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0
3/4/26 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0
3/3/26 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0
3/2/26 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0
3/1/26 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0