Create Custom Reports and Graphics: Custom Report
Powdery Mildew Stress Points
2026 (Current) 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016
Daily Powdery Mildew Stress Activation Hours
Daily Activation Hours (70-85°)

Powdery Mildew Stress Points - 2026

3/1/2026 - 10/1/2026

Daily Data
as of 3/25/26 7:50 AM PDT
Date Montesol Pope Valley (Weeks Lake) Whiskey River Winery Dollarhide 17B Remote Dollarhide Base Dollarhide 1AS Remote Dollarhide 18A Remote Hardin Rd (Eakle) Angwin Lower Angwin (Pioneer) Tenma (North Calistoga) Calistoga-North Paloma Calistoga (Ranch 78) Twomey Calistoga Fotsch (Maple Lane) Diamond Mtn (Schramsberg) Diamond Mtn (McEachran) St. Helena-North Deer Park St. Helena (NVV Office) Tiara Fria (East St. Helena) Rutherford Hill Estate Rutherford-North (Mee Ln) Rutherford (STS) Oakville-NE (Ranch 88) Silver Oak OV Crossroads Ranch To Kalon Remote (TKKE) UC Oakville Research To Kalon To Kalon Remote (TKN5) OV561-East Oakville OV518-West Lower Chiles Valley (Brown) Moss Creek Vineyard/Reservior Yountville (Ranch 67) Stags Leap Dist (Silverado Vineyards) Borreo (Soda Canyon) Soda Canyon State Lane Wappo Hill West (WP601) Wappo Hill North (WPDN2) Wappo Hill Floor Wappo Hill Stags Leap Dist (Chimney Rock) Yountville-South (Ranch 87) Yountville-SE (Ranch 85) Mt. Veeder Wooden Valley Oak Knoll-East (Ranch 53) Napa-NW (Ranch 54) Frisinger Napa-NW Napa-North (Ranch 29) Napa-East (Palmaz 1400') Napa-East (Palmaz 1200') Napa-East (Palmaz 300') Mount George (Napa East) Sunset Rd Napa-West Upper (Truchard) Napa-West Lower (Truchard) Toyon Remote 3 Napa-South (Toyon Farms) Toyon Remote 2 Toyon Remote 1 Dealy Lane (Ranch 80) Carneros (Saintsbury) Carneros (Ranch 71) Carneros Upper (Ranch 81) Carneros Lower (Ranch 81) Carneros (Mitsuko) Sugarloaf West Stanly (Ranch 45) Suscol Lower (Ranch 35) Suscol Mtn (Ranch 93) Suscol Upper (Ranch 92) Carneros (Las Amigas Rd) Carneros (Milton Rd)
3/24/26 100 100 - 60 100 - 90 100 100 100 60 20 90 90 90 - 100 100 60 90 60 60 60 60 60 0 90 90 60 70 60 60 60 90 90 100 0 100 100 0 80 90 40 70 60 70 100 60 100 100 100 60 100 60 100 100 - 100 80 - 80 70 - 80 - - 80 0 50 100 0 0 80 0 0 100 100 0 0
3/23/26 100 80 - 70 80 - 70 80 90 90 70 30 70 70 70 - 100 80 70 70 70 70 70 70 70 0 70 70 70 50 70 70 70 70 70 100 0 100 90 0 60 70 50 50 70 50 80 70 80 90 100 70 90 0 80 90 - 100 60 - 60 80 - 60 - - 60 0 30 100 0 0 60 0 0 100 100 0 0
3/22/26 90 60 - 50 60 - 50 60 100 100 50 10 50 50 50 - 100 60 50 50 50 50 50 50 50 0 50 50 50 30 50 50 50 50 50 90 0 90 70 0 0 50 30 30 50 30 60 50 60 100 100 50 70 0 60 100 - 90 40 - 0 60 - 40 - - 0 0 40 90 0 0 40 0 0 90 90 0 0
3/21/26 70 40 - 30 40 - 30 40 100 100 30 20 30 30 30 - 100 40 30 30 30 30 30 30 30 0 30 30 30 10 30 30 30 30 30 70 0 70 50 0 0 30 10 10 30 10 40 30 40 100 100 30 50 0 40 100 - 70 20 - 0 40 - 50 - - 0 0 50 100 0 0 50 0 0 100 100 0 0
3/20/26 50 50 - 40 50 - 40 50 100 100 40 30 40 40 40 - 100 20 40 40 40 40 40 40 40 0 40 40 40 20 40 40 40 40 40 50 0 50 60 0 0 40 20 20 40 20 50 40 50 100 80 40 60 0 50 90 - 50 0 - 0 50 - 30 - - 0 0 30 90 0 0 30 0 0 100 100 0 0
3/19/26 60 60 - 50 60 - 50 60 100 100 50 40 50 50 50 - 100 30 50 50 50 50 50 50 50 0 50 50 50 30 50 50 50 50 50 60 0 60 70 0 0 50 30 30 50 30 60 50 60 100 90 50 70 0 60 100 - 60 0 - 0 60 - 40 - - 0 0 40 70 0 0 40 0 0 100 100 0 0
3/18/26 0 70 - 60 70 - 60 70 80 80 60 50 60 60 60 - 80 40 60 60 60 60 60 60 60 0 60 60 60 40 60 60 60 60 60 70 0 70 80 0 0 60 40 40 60 40 70 60 70 80 100 60 80 0 70 80 - 70 10 - 0 70 - 50 - - 0 0 50 50 0 0 50 0 0 80 80 0 0
3/17/26 0 80 - 70 80 - 70 80 60 60 70 60 70 70 70 - 60 50 70 70 70 70 70 70 70 0 70 70 70 50 70 70 70 70 70 80 0 80 90 0 0 70 50 50 70 50 80 70 80 60 100 70 90 0 80 60 - 80 20 - 0 80 - 60 - - 0 0 60 60 0 0 60 0 0 60 60 0 0
3/16/26 0 90 - 80 90 - 80 90 0 0 80 70 80 80 80 - 0 60 80 80 80 80 80 80 80 0 80 80 80 60 80 80 80 80 80 90 0 90 70 0 0 80 60 60 80 60 90 80 90 0 100 80 100 0 90 0 - 90 30 - 0 90 - 70 - - 0 0 0 0 0 0 0 0 0 0 0 0 0
3/15/26 0 100 - 90 100 - 90 100 0 0 90 80 90 90 90 - 0 70 90 90 90 90 90 90 90 0 90 90 90 70 90 90 90 90 90 100 0 70 80 0 0 90 70 70 90 70 100 90 100 0 100 90 100 0 100 0 - 100 40 - 0 100 - 50 - - 0 0 0 0 0 0 0 0 0 0 0 0 0
3/14/26 0 100 - 100 100 100 100 100 0 0 100 90 100 100 100 - 0 80 100 100 100 100 100 100 100 0 100 100 100 80 100 100 100 100 100 80 0 80 60 0 0 100 80 80 100 80 80 100 80 0 80 100 100 0 80 0 - 100 50 0 0 100 - 30 - - 0 0 0 0 0 0 0 0 0 0 0 0 0
3/13/26 0 100 - 100 100 100 80 80 0 0 100 100 100 100 100 - 0 60 100 100 100 100 100 100 100 0 100 100 100 60 100 100 100 100 100 60 0 60 0 0 0 100 60 60 100 60 60 100 60 0 60 100 100 0 60 0 - 100 60 0 0 100 - 40 - - 0 0 0 0 0 0 0 0 0 0 0 0 0
3/12/26 0 90 - 90 90 90 60 60 0 0 90 100 90 90 100 - 0 0 100 90 100 90 90 90 90 0 90 90 100 0 90 100 100 90 90 0 0 0 0 0 0 90 0 0 90 0 0 100 0 0 0 100 90 0 0 0 - 80 0 0 0 80 - 50 - - 0 0 0 0 0 0 0 0 0 0 0 0 0
3/11/26 0 70 - 70 70 70 40 40 0 0 70 80 70 70 90 - 0 0 90 70 90 70 70 70 70 0 70 70 90 0 70 90 90 70 70 0 0 0 0 0 0 70 0 0 70 0 0 90 0 0 0 90 70 0 0 0 - 60 0 0 0 60 - 30 - - 0 0 0 0 0 0 0 0 0 0 0 0 0
3/10/26 0 50 - 50 50 50 50 50 0 0 50 - 50 50 70 - 0 0 70 50 70 50 50 50 50 0 50 50 70 0 50 70 70 50 50 0 0 0 0 0 0 50 0 0 50 0 0 70 0 0 0 70 50 0 0 0 - 40 0 0 0 40 - 40 - - 0 0 0 0 0 0 0 0 0 0 0 0 0
3/9/26 0 60 - 60 60 60 60 60 0 0 60 60 60 60 80 0 0 0 80 60 80 60 60 60 60 0 60 60 80 0 60 80 80 60 60 0 0 0 0 0 0 60 0 0 60 0 0 80 0 0 0 80 60 0 0 0 0 50 0 0 0 50 - 50 - - 0 0 0 0 0 0 0 0 0 0 0 0 0
3/8/26 0 0 - 0 0 0 0 0 0 0 0 70 0 0 60 0 0 0 60 0 60 0 0 0 0 0 0 0 60 0 0 60 60 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 0 0 0 60 0 0 0 0 0 60 0 0 0 60 - 60 - - 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 50 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 30 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 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 30 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 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 40 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 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 50 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 - 0 - - 0 0 0 0 0 0 0 0 0 0 0 0 0