| Station | Date | Daily Max Temp (°F) | Time of Max Temp | Daily Min Temp (°F) | Time of Min Temp | Dew Pt (°F) | Daily Max RH (%) | Daily Min RH (%) | Wind Spd (mph) | Daily Max Wind (mph) | Time of Max Wind | Max Wind Dir (°) | Daily Rain (In) | Season Precip (In) | Daily ETo (in) | Daily Solar Rad (Cal/cm2) | Powdery Mildew Stress (pts) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Montesol | 5/15/26 | 82.4 0.5 | 1456 | 47.1 1.6 | 0354 | - | - | - | - | - | - | - | 0.00 | 50.09 | - | - | 100 0 |
| Pope Valley (Weeks Lake) | 5/15/26 | 87.3 0.0 | 1437 | 42.7 0.5 | 0539 | 41.1 6.3 | 100 0 | 11 10 | 2.9 | 18.2 4.4 | 1721 | WSW | 240 | 0.00 | 26.24 | 0.232 0.016 | 638 12 | 80 10 |
| Dollarhide Base | 5/15/26 | 89.1 1.5 | 1400 | 48.6 0.6 | 0608 | 47.4 4.3 | 96 3 | 19 10 | 4.3 | 17.9 1.8 | 1629 | SW | 231 | 0.00 | 23.14 | 0.276 0.012 | 728 11 | 80 10 |
| Dollarhide 1AS Remote | 5/15/26 | 88.9 1.2 | 1521 | 42.8 0.4 | 0558 | 46.6 3.3 | 95 0 | 18 10 | 2.5 | 16.6 0.4 | 1638 | SW | 218 | - | - | - | - | 80 10 |
| Dollarhide 18A Remote | 5/15/26 | 88.7 1.6 | 1418 | 40.0 0.3 | 0556 | 45.2 3.6 | 99 0 | 17 11 | - | - | - | - | - | - | - | - | 70 10 |
| Angwin | 5/15/26 | 78.6 1.2 | 1523 | 57.2 2.0 | 0628 | 35.0 7.4 | 49 9 | 12 14 | 5.8 | 22.7 7.3 | 0042 | NNW | 336 | 0.00 | 45.11 | 0.090 0.024 | 0 0 | 100 10 |
| Lower Angwin (Pioneer) | 5/15/26 | 79.9 0.0 | 1505 | 42.4 3.5 | 0008 | - | - | - | 3.1 | 14.8 0.5 | 1800 | NNW | 337 | - | - | - | - | 100 0 |
| Deer Park | 5/15/26 | 85.8 0.3 | 1517 | 53.9 3.8 | 0505 | 42.7 5.2 | 63 26 | 22 0 | 5.3 | 18.1 4.9 | 2311 | NNW | 334 | 0.00 | 28.72 | 0.213 0.031 | 489 9 | 100 0 |
| Lower Chiles Valley (Brown) | 5/15/26 | 84.4 0.9 | 1512 | 41.0 0.1 | 0608 | 44.2 4.3 | 100 0 | 21 7 | 2.5 | 16.2 2.9 | 1734 | NW | 320 | 0.00 | 25.89 | 0.231 0.015 | 695 8 | 100 0 |
| Moss Creek Vineyard/Reservior | 5/15/26 | 87.9 0.1 | 1446 | 46.6 0.0 | 0636 | 44.0 5.6 | 94 6 | 10 10 | - | - | - | - | 0.00 | 27.05 | - | - | 10 10 |
| Max | 89.1 | - | 57.2 | - | 47.4 | 100 | 22 | 5.8 | 22.7 | - | - | 0.00 | 50.09 | 0.276 | 728 | - | |
| Avg | - | - | - | - | 43.3 | - | - | 3.8 | - | - | - | - | - | - | - | - | |
| Min | 78.6 | - | 40.0 | - | 35.0 | 49 | 10 | 2.5 | 14.8 | - | - | 0.00 | 23.14 | 0.090 | 0 | - |
| Station | Date | Daily Max Temp (°F) | Time of Max Temp | Daily Min Temp (°F) | Time of Min Temp | Dew Pt (°F) | Daily Max RH (%) | Daily Min RH (%) | Wind Spd (mph) | Daily Max Wind (mph) | Time of Max Wind | Max Wind Dir (°) | Daily Rain (In) | Season Precip (In) | Daily ETo (in) | Daily Solar Rad (Cal/cm2) | Powdery Mildew Stress (pts) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Calistoga-North | 5/15/26 | 89.4 0.9 | 1530 | 47.3 0.8 | 0409 | 44.7 5.4 | 90 8 | 24 1 | - | - | - | - | 0.00 | 32.79 | - | - | 50 10 |
| Diamond Mtn (Schramsberg) | 5/15/26 | 85.4 0.8 | 1616 | 49.2 2.1 | 0542 | 44.2 3.0 | 75 8 | 22 1 | - | - | - | - | 0.00 | 31.20 | - | - | 100 0 |
| Diamond Mtn (McEachran) | 5/15/26 | 84.3 0.3 | 1533 | 50.6 0.2 | 0432 | 43.3 4.1 | 79 12 | 22 2 | - | - | - | - | - | - | - | - | 100 0 |
| St. Helena-North | 5/15/26 | 89.7 1.7 | 1346 | 48.2 0.9 | 0551 | 41.7 4.7 | 78 12 | 18 3 | 2.0 | 13.6 0.4 | 1646 | NW | 324 | 0.00 | 31.03 | 0.199 0.009 | 577 10 | 80 10 |
| St. Helena (NVV Office) | 5/15/26 | 89.7 0.0 | 1523 | 48.4 0.3 | 0546 | - | - | - | 1.8 | 13.6 5.4 | 2236 | NNW | 348 | 0.00 | 28.47 | - | - | 80 10 |
| Tiara Fria (East St. Helena) | 5/15/26 | 87.8 0.1 | 1621 | 48.2 0.2 | 0607 | 45.2 5.1 | 92 1 | 21 2 | 3.9 | 20.6 10.0 | 2323 | NW | 322 | 0.00 | 26.44 | - | - | 80 10 |
| Rutherford Hill Estate | 5/15/26 | 88.7 2.1 | 1546 | 49.4 0.2 | 0556 | 47.1 4.9 | 90 10 | 24 10 | 2.5 | 14.2 2.0 | 2104 | NNW | 334 | 0.00 | 25.00 | 0.205 0.018 | 600 9 | 90 10 |
| Rutherford-North (Mee Ln) | 5/15/26 | 88.3 0.5 | 1600 | 42.3 0.5 | 0558 | 45.9 4.9 | 96 0 | 22 1 | 3.4 | 23.2 6.4 | 2244 | NW | 321 | 0.00 | 24.52 | 0.221 0.018 | 613 10 | 90 10 |
| Rutherford (STS) | 5/15/26 | 88.9 0.3 | 1527 | 44.7 0.4 | 0602 | 49.6 3.6 | 90 0 | 28 0 | 2.5 | 12.8 1.2 | 1700 | NW | 310 | 0.00 | 25.82 | 0.234 0.013 | 712 15 | 80 10 |
| Oakville-NE (Ranch 88) | 5/15/26 | 88.3 3.2 | 1613 | 43.4 0.6 | 0607 | 45.4 4.3 | 95 0 | 20 15 | 2.4 | 12.2 1.6 | 1529 | S | 175 | 0.00 | 24.92 | 0.221 0.009 | 662 10 | 80 20 |
| OV561-East | 5/15/26 | 89.8 6.1 | 1705 | 45.4 1.1 | 0602 | - | - | - | - | - | - | - | - | - | - | - | 80 10 |
| Oakville | 5/15/26 | 86.9 3.7 | 1645 | 44.8 0.3 | 0550 | 47.3 3.7 | 97 0 | 22 17 | 2.9 | 20.4 4.6 | 1711 | SE | 140 | 0.00 | 25.51 | 0.228 0.007 | 698 7 | 50 10 |
| OV518-West | 5/15/26 | 87.7 4.4 | 1811 | 45.8 0.3 | 0611 | - | - | - | - | - | - | - | - | - | - | - | 90 20 |
| To Kalon Remote (TKKE) | 5/15/26 | 88.7 0.4 | 1642 | 44.0 0.8 | 0611 | - | - | - | - | - | - | - | - | - | - | - | 80 10 |
| To Kalon | 5/15/26 | 86.6 0.1 | 1627 | 44.5 0.6 | 0551 | 48.2 3.6 | 98 0 | 25 4 | 2.4 | 11.8 2.4 | 1332 | SE | 125 | 0.00 | 27.70 | 0.212 0.004 | 639 7 | 80 10 |
| To Kalon Remote (TKN5) | 5/15/26 | 88.4 0.8 | 1527 | 44.8 0.8 | 0558 | - | - | - | - | - | - | - | - | - | - | - | 80 10 |
| Yountville (Ranch 67) | 5/15/26 | 84.1 3.5 | 1557 | 44.1 0.5 | 0618 | 46.9 3.0 | 96 0 | 28 14 | 3.0 | 14.8 3.1 | 1450 | ESE | 106 | 0.00 | 23.62 | 0.229 0.009 | 725 2 | 60 20 |
| Stags Leap Dist (Silverado Vineyards) | 5/15/26 | 84.8 3.1 | 1538 | 44.0 0.0 | 0552 | 47.2 2.8 | 96 0 | 26 14 | 2.4 | 14.6 0.2 | 1803 | SE | 126 | 0.00 | 27.62 | 0.224 0.010 | 682 10 | 40 20 |
| Borreo (Soda Canyon) | 5/15/26 | 81.8 3.5 | 1619 | 43.9 0.5 | 0549 | 46.4 3.5 | 98 0 | 27 16 | 2.0 | 12.1 2.1 | 1619 | ESE | 109 | 0.00 | 27.52 | 0.219 0.009 | 716 8 | 60 20 |
| Wappo Hill Floor | 5/15/26 | 85.8 3.6 | 1627 | 42.8 0.6 | 0549 | 48.0 2.6 | 100 0 | 27 14 | 3.6 | 17.1 1.9 | 0018 | NW | 318 | 0.00 | 26.75 | 0.229 0.017 | 679 10 | 70 10 |
| Stags Leap Dist (Chimney Rock) | 5/15/26 | 84.4 3.6 | 1605 | 43.4 0.2 | 0523 | 50.0 2.2 | 100 0 | 33 15 | 3.0 | 14.9 0.8 | 1514 | ESE | 102 | 0.00 | 26.14 | 0.204 0.013 | 617 9 | 60 20 |
| Yountville-South (Ranch 87) | 5/15/26 | 87.0 3.6 | 1639 | 45.4 0.5 | 0608 | 49.6 2.3 | 100 0 | 24 17 | 2.1 | 13.9 0.1 | 1715 | ESE | 122 | 0.00 | 27.39 | 0.222 0.008 | 699 9 | 90 10 |
| Yountville-SE (Ranch 85) | 5/15/26 | 85.0 4.3 | 1623 | 45.8 0.2 | 0619 | 49.0 2.7 | 97 1 | 28 16 | 2.9 | 14.1 1.8 | 1517 | SSE | 161 | 0.00 | 25.69 | - | 0 0 | 60 20 |
| Oak Knoll-East (Ranch 53) | 5/15/26 | 85.4 3.6 | 1555 | 45.9 0.0 | 0611 | 48.1 2.6 | 94 1 | 24 5 | 2.4 | 14.2 1.7 | 1337 | SE | 134 | 0.00 | 24.30 | 0.227 0.010 | 710 6 | 70 10 |
| Napa-NW (Ranch 54) | 5/15/26 | 88.0 2.6 | 1703 | 46.9 0.2 | 0614 | 48.9 1.8 | 93 7 | 22 5 | 1.0 | 10.4 1.3 | 1812 | NNE | 32 | 0.00 | 26.77 | - | 0 0 | 90 10 |
| Napa-North (Ranch 29) | 5/15/26 | 83.9 4.4 | 1633 | 46.6 0.5 | 0610 | 49.4 2.1 | 100 0 | 28 14 | 1.9 | 13.2 0.6 | 1448 | S | 182 | 0.00 | 25.18 | 0.143 0.010 | 403 5 | 80 20 |
| Max | 89.8 | - | 50.6 | - | 50.0 | 100 | 33 | 3.9 | 23.2 | - | - | 0.00 | 32.79 | 0.234 | 725 | - | |
| Avg | - | - | - | - | 47.0 | - | - | 2.5 | - | - | - | - | - | - | - | - | |
| Min | 81.8 | - | 42.3 | - | 41.7 | 75 | 18 | 1.0 | 10.4 | - | - | 0.00 | 23.62 | 0.143 | 0 | - |
| Station | Date | Daily Max Temp (°F) | Time of Max Temp | Daily Min Temp (°F) | Time of Min Temp | Dew Pt (°F) | Daily Max RH (%) | Daily Min RH (%) | Wind Spd (mph) | Daily Max Wind (mph) | Time of Max Wind | Max Wind Dir (°) | Daily Rain (In) | Season Precip (In) | Daily ETo (in) | Daily Solar Rad (Cal/cm2) | Powdery Mildew Stress (pts) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mt. Veeder | 5/15/26 | 81.4 0.3 | 1540 | 53.2 3.7 | 0310 | 40.2 7.2 | 66 5 | 21 3 | 2.0 | 14.5 4.2 | 1450 | S | 179 | 0.00 | 34.19 | 0.304 0.038 | 1,050 274 | 50 20 |
| Mount George (Napa East) | 5/15/26 | 80.8 1.3 | 1536 | 50.0 1.3 | 0423 | 51.2 2.0 | 99 0 | 27 16 | 1.5 | 10.7 0.6 | 1518 | SSW | 201 | 0.00 | 17.04 | 0.211 0.011 | 680 10 | 80 20 |
| Napa-East (Palmaz 300') | 5/15/26 | 83.0 2.9 | 1506 | 47.3 0.1 | 0439 | 48.8 2.6 | 100 0 | 27 14 | 2.1 | 11.1 0.4 | 1550 | SW | 235 | 0.00 | 23.29 | 0.182 0.008 | 560 5 | 60 20 |
| Napa-East (Palmaz 1200') | 5/15/26 | 77.7 3.0 | 1551 | 44.6 0.5 | 0556 | 46.0 2.5 | 100 0 | 3 43 | 2.4 | 14.2 2.3 | 1551 | NW | 314 | - | - | 0.201 0.011 | 695 15 | 0 0 |
| Napa-East (Palmaz 1400') | 5/15/26 | 76.6 1.0 | 1507 | 47.5 0.9 | 0355 | 46.4 4.1 | 89 11 | 31 18 | 3.4 | 14.5 2.6 | 1557 | WSW | 254 | 0.00 | 30.80 | 0.213 0.020 | 678 5 | 40 20 |
| Wooden Valley | 5/15/26 | 79.4 0.1 | 1537 | 53.0 3.9 | 0310 | 45.7 3.8 | 77 16 | 22 14 | 4.3 | 17.0 0.4 | 1619 | SSW | 211 | 0.00 | 29.11 | 0.235 0.015 | 706 7 | 100 0 |
| Napa-West Upper (Truchard) | 5/15/26 | 81.6 2.4 | 1513 | 49.7 0.4 | 0433 | 49.7 11.6 | 100 0 | 28 27 | 3.4 | 16.7 0.9 | 1545 | SSW | 193 | 0.00 | 24.41 | 0.228 0.013 | 690 7 | 80 20 |
| Napa-West Lower (Truchard) | 5/15/26 | 84.3 4.0 | 1623 | 41.8 0.2 | 0605 | 47.6 2.1 | 100 0 | 25 14 | - | - | - | - | - | - | - | - | 100 0 |
| Napa-South (Toyon Farms) | 5/15/26 | 81.3 4.3 | 1438 | 48.4 0.8 | 0625 | 52.0 2.0 | 100 0 | 35 19 | 2.9 | 15.0 0.2 | 1539 | SW | 226 | 0.00 | 18.34 | 0.120 0.014 | 333 5 | 70 20 |
| Toyon Remote 1 | 5/15/26 | 84.8 6.1 | 1357 | 39.0 0.0 | 0556 | - | - | - | - | - | - | - | - | - | - | - | - |
| Toyon Remote 2 | 5/15/26 | 81.9 5.4 | 1428 | 43.4 0.1 | 0528 | - | - | - | - | - | - | - | - | - | - | - | - |
| Toyon Remote 3 | 5/15/26 | 85.4 6.6 | 1452 | 43.9 0.1 | 0558 | - | - | - | - | - | - | - | - | - | - | - | - |
| Dealy Lane (Ranch 80) | 5/15/26 | 82.1 2.7 | 1443 | 47.6 0.7 | 0240 | 47.8 2.7 | 96 0 | 28 5 | 2.3 | 14.7 0.3 | 1711 | WNW | 290 | 0.00 | 23.58 | 0.214 0.009 | 691 6 | 70 20 |
| Carneros (Saintsbury) | 5/15/26 | 81.6 5.2 | 1438 | 45.3 0.6 | 0612 | 48.4 2.3 | 100 0 | 27 19 | 4.1 | 17.3 1.6 | 1537 | SW | 232 | 0.00 | 8.68 | - | - | 70 20 |
| Suscol Lower (Ranch 35) | 5/15/26 | 81.8 4.8 | 1543 | 46.1 1.2 | 0528 | 48.4 2.1 | - | - | 4.1 | 14.8 0.7 | 1534 | SW | 234 | 0.00 | 22.84 | 0.206 0.013 | 627 3 | 70 20 |
| Suscol Mtn (Ranch 93) | 5/15/26 | 81.6 1.5 | 1528 | 51.0 0.6 | 0349 | 47.8 3.2 | 90 2 | 32 12 | 5.1 | 25.3 11.1 | 2330 | N | 6 | 0.00 | 18.60 | - | - | 70 20 |
| Suscol Upper (Ranch 92) | 5/15/26 | 79.2 2.8 | 1648 | 50.4 0.1 | 0403 | 47.4 3.3 | 91 2 | 31 10 | 2.5 | 17.4 4.7 | 1559 | SW | 215 | 0.00 | 22.35 | - | - | 40 20 |
| Stanly (Ranch 45) | 5/15/26 | 83.6 5.9 | 1510 | 43.8 1.5 | 0620 | 47.8 2.4 | 97 0 | 25 17 | 4.0 | 17.6 1.1 | 1437 | SSW | 193 | 0.00 | 22.49 | 0.244 0.017 | 751 5 | 70 20 |
| Carneros Upper (Ranch 81) | 5/15/26 | 78.8 1.0 | 1427 | 52.0 0.9 | 0509 | 46.1 3.8 | - | - | 6.3 | 25.0 8.7 | 1711 | WNW | 288 | - | - | - | - | 40 20 |
| Carneros (Mitsuko) | 5/15/26 | 81.3 4.4 | 1447 | 41.0 0.4 | 0608 | - | - | - | - | - | - | - | - | - | - | - | 70 20 |
| Carneros Lower (Ranch 81) | 5/15/26 | 84.6 3.3 | 1419 | 44.7 0.1 | 0606 | 46.1 4.3 | 100 0 | 0 0 | 1.0 | 12.1 0.9 | 1715 | NW | 318 | 0.00 | 19.42 | 0.187 0.005 | 613 9 | 60 20 |
| Carneros (Milton Rd) | 5/15/26 | 82.5 7.2 | 1523 | 42.1 0.0 | 0610 | 47.7 2.1 | 96 1 | 30 16 | - | - | - | - | 0.00 | 18.07 | - | - | 70 20 |
| Max | 85.4 | - | 53.2 | - | 52.0 | 100 | 35 | 6.3 | 25.3 | - | - | 0.00 | 34.19 | 0.304 | 1,050 | - | |
| Avg | - | - | - | - | 47.5 | - | - | 3.2 | - | - | - | - | - | - | - | - | |
| Min | 76.6 | - | 39.0 | - | 40.2 | 66 | 0 | 1.0 | 10.7 | - | - | 0.00 | 8.68 | 0.120 | 333 | - |