| Station | Date | Daily Max Temp (°F) | Time of Max Temp | Daily Min Temp (°F) | Time of Min Temp | Dew Pt (°F) | RH (%) | 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rockpile Lower (Cooley) | 3/21/26 | 78.3 16.3 | 1356 | 51.8 14.9 | 2310 | 41.6 3.1 | 41 | 62 18 | 24 12 | 6.6 | 26.6 11.9 | 1628 | WNW | 290 | 0.00 | 36.97 | - | - | 0 0 |
| Rockpile Upper (Cooley) | 3/21/26 | 73.6 16.7 | 1341 | 47.1 16.2 | 0010 | 41.0 3.9 | 48 | 70 25 | 26 13 | 16.5 | 36.6 10.3 | 1707 | NW | 325 | 0.00 | 37.66 | 0.237 0.047 | 541 20 | 0 0 |
| Cloverdale-East (Ranch 83) | 3/21/26 | 86.1 9.4 | 1453 | 52.3 4.1 | 0404 | 45.8 0.7 | - | - | - | 4.4 | 22.4 1.9 | 1252 | NNW | 334 | 0.00 | 30.99 | 0.196 0.010 | 485 11 | 10 10 |
| Cloverdale-SE (Ranch 38) | 3/21/26 | 85.1 7.6 | 1338 | 55.1 5.3 | 2354 | 46.3 0.7 | 46 | 65 12 | 28 7 | 8.5 | 25.0 2.6 | 0754 | N | 354 | 0.00 | 32.45 | 0.220 0.001 | 465 1 | 0 0 |
| Geyserville-North (Hoffman) | 3/21/26 | 87.0 9.7 | 1452 | 53.6 6.4 | 0107 | 46.3 3.7 | 45 | 88 2 | 24 5 | 5.6 | 17.0 6.5 | 1549 | WNW | 285 | 0.00 | 25.50 | 0.197 0.035 | 455 11 | 10 10 |
| Geyserville (Ranch 3) | 3/21/26 | 87.1 5.8 | 1441 | 56.4 5.3 | 0106 | 44.1 3.9 | 41 | 82 3 | 21 8 | 7.6 | 19.8 8.3 | 1654 | W | 269 | 0.00 | 31.63 | 0.232 0.057 | 479 8 | 10 10 |
| Geyserville-East (Ranch 40) | 3/21/26 | 86.2 6.3 | 1600 | 54.1 6.7 | 0059 | 46.6 2.8 | 45 | 66 13 | 26 5 | 5.8 | 20.2 7.2 | 1253 | NNW | 334 | 0.00 | 32.10 | 0.206 0.012 | 508 1 | 10 10 |
| Geyserville-South (Nervo Station) | 3/21/26 | 86.5 5.6 | 1321 | 54.8 1.7 | 0056 | - | - | - | - | 7.3 | 23.9 13.8 | 0548 | NW | 304 | 0.00 | 24.64 | - | - | 10 10 |
| Jimtown-North (Piccolo Ranch 15) | 3/21/26 | 86.1 9.3 | 1522 | 50.3 3.6 | 0041 | 45.8 3.0 | 54 | 100 0 | 21 6 | 3.1 | 19.3 11.4 | 1750 | W | 260 | 0.00 | 29.34 | 0.166 0.033 | 442 9 | 40 20 |
| HWY 128/Chalk Hill Rd (Landslide) | 3/21/26 | 88.4 6.9 | 1405 | 47.2 2.4 | 0708 | 47.2 3.8 | 61 | 100 2 | 23 5 | 2.8 | 19.4 12.1 | 1602 | W | 269 | 0.00 | 28.06 | 0.166 0.021 | 433 9 | 30 10 |
| N Chalk Hill Rd (Ranch 63) | 3/21/26 | 85.7 6.6 | 1509 | 45.7 2.2 | 0707 | 45.6 3.9 | 59 | 100 0 | 21 2 | 2.3 | 21.5 14.4 | 1634 | WNW | 294 | 0.00 | 29.61 | 0.159 0.014 | 440 8 | 30 10 |
| Knights Valley (Bavarian Lion) | 3/21/26 | 85.8 7.6 | 1403 | 44.9 1.9 | 0047 | 45.8 3.6 | 62 | 98 0 | 22 8 | 3.4 | 18.2 9.9 | 1736 | NW | 315 | 0.00 | 27.72 | 0.177 0.021 | 483 14 | 20 10 |
| Upper Dry Creek Valley | 3/21/26 | 85.4 7.3 | 1443 | 53.4 4.8 | 0124 | 42.7 6.4 | 40 | 89 1 | 17 1 | 7.2 | 23.2 15.3 | 1610 | WNW | 285 | 0.00 | 34.53 | 0.241 0.068 | 521 6 | 20 10 |
| Lower Dry Creek Valley | 3/21/26 | 86.4 7.6 | 1440 | 51.8 6.4 | 0222 | 44.3 5.5 | 42 | 100 0 | 16 1 | 8.5 | 21.0 9.9 | 1744 | NW | 306 | 0.00 | 33.46 | 0.243 0.078 | 478 7 | 10 10 |
| Max | 88.4 | - | 56.4 | - | 47.2 | 62 | 100 | 28 | 16.5 | 36.6 | - | - | 0.00 | 37.66 | 0.243 | 541 | - | |
| Avg | - | - | - | - | 44.9 | 49 | - | - | 6.4 | - | - | - | - | - | - | - | - | |
| Min | 73.6 | - | 44.9 | - | 41.0 | 40 | 62 | 16 | 2.3 | 17.0 | - | - | 0.00 | 24.64 | 0.159 | 433 | - |
| Station | Date | Daily Max Temp (°F) | Time of Max Temp | Daily Min Temp (°F) | Time of Min Temp | Dew Pt (°F) | RH (%) | Daily Max RH (%) | Daily Min RH (%) | Wind Spd (mph) | Daily Max Wind (mph) | Time of Max Wind | Daily Rain (In) | Season Precip (In) | Daily ETo (in) | Daily Solar Rad (Cal/cm2) | Powdery Mildew Stress (pts) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Windsor-NW (Ranch 8) | 3/21/26 | 88.6 5.7 | 1419 | 51.5 0.4 | 0058 | 48.7 4.5 | 56 | 83 1 | 22 3 | 3.1 | 19.8 11.9 | 1716 | 0.00 | 29.12 | 0.194 0.031 | 507 6 | 30 |
| Windsor-East (Ranch 16) | 3/21/26 | 87.2 5.6 | 1533 | 48.1 2.3 | 0719 | 46.9 3.2 | 58 | 96 1 | 19 2 | 2.7 | 15.6 6.6 | 1717 | 0.00 | 21.96 | 0.184 0.012 | 499 13 | 10 |
| Mark West-North (Ranch 14) | 3/21/26 | 88.5 4.1 | 1519 | 48.9 2.5 | 0047 | 46.1 4.3 | 57 | 95 2 | 17 1 | 1.3 | 9.3 0.1 | 1810 | 0.00 | 23.74 | 0.033 0.010 | 0 0 | 0 |
| Windsor-SE (Silk Rd) | 3/21/26 | 87.3 4.8 | 1519 | 46.2 1.1 | 0724 | 46.4 3.9 | 62 | 98 0 | 18 7 | 2.5 | 16.5 7.9 | 1440 | 0.00 | 21.14 | 0.176 0.012 | 494 12 | 0 |
| Fulton-NW (Ranch 5) | 3/21/26 | 87.3 3.4 | 1451 | 48.1 2.8 | 0038 | 47.3 2.6 | 61 | 97 3 | 18 15 | 2.6 | 17.4 7.9 | 1821 | 0.00 | 23.97 | 0.183 0.011 | 502 12 | 0 |
| Windsor-South (Laughlin Rd) | 2/27/26 | 81.3 4.8 | 1431 | 49.4 1.9 | 0637 | 53.1 42.4 | 74 | 100 0 | 0 0 | - | - | - | 0.00 | 24.07 | - | - | - |
| Fulton-SE (Barnes Rd) | 3/21/26 | 89.1 3.1 | 1539 | 49.4 1.9 | 0057 | 48.6 2.6 | 59 | 92 4 | 22 4 | 2.7 | 17.3 6.6 | 1717 | 0.00 | 23.01 | - | - | 0 |
| Fulton-SW (Ranch 21) | 3/21/26 | 86.9 3.2 | 1523 | 47.7 1.9 | 0053 | 48.6 1.6 | 65 | 100 0 | 0 0 | 2.9 | 16.7 7.6 | 1704 | 0.00 | 23.44 | 0.183 0.006 | 524 21 | 0 |
| NW Santa Rosa (Piner Road) | 3/21/26 | 87.4 4.1 | 1534 | 47.0 1.8 | 0059 | 52.0 1.7 | 72 | 100 0 | 26 3 | 1.3 | 9.8 0.0 | 1428 | 0.00 | 21.90 | - | - | 0 |
| River Rd South (Denner Ranch) | 3/21/26 | 89.1 0.2 | 1429 | 46.5 0.9 | 0053 | 48.1 4.5 | 68 | 100 0 | 0 0 | 3.0 | 19.3 5.7 | 1618 | - | - | - | - | 0 |
| West Santa Rosa (LOV Vineyard) | 3/21/26 | 87.9 2.8 | 1555 | 47.3 0.6 | 0059 | 49.1 2.0 | 66 | 98 2 | 17 6 | 1.9 | 17.6 7.4 | 1640 | 0.00 | 16.83 | 0.043 0.013 | 1 0 | 0 |
| Guerneville Rd (Prokopakis) | 3/21/26 | 88.1 5.4 | 1522 | 47.9 0.4 | 0059 | 49.5 2.1 | 64 | 97 1 | 17 4 | - | - | - | 0.00 | 23.04 | - | - | 0 |
| Guerneville Rd West (Balletto) | 3/21/26 | 88.0 3.2 | 1545 | 45.7 0.8 | 0039 | 50.8 2.0 | 71 | 100 0 | 22 5 | 2.2 | 15.1 5.4 | 1554 | 0.00 | 22.55 | - | - | 0 |
| Sanchietti Ranch | 3/21/26 | 82.7 8.0 | 1346 | 46.9 0.3 | 0053 | 53.8 0.3 | - | 97 1 | 43 12 | 2.7 | 13.8 4.3 | 1534 | 0.00 | 23.50 | - | - | 0 |
| Occidental Rd (Sebastopol) | 3/21/26 | 84.4 6.4 | 1420 | 45.0 0.4 | 0039 | 57.2 0.4 | 88 | 100 0 | 44 10 | 1.5 | 9.2 2.4 | 1321 | 0.00 | 6.96 | - | - | 0 |
| Lower Westside Rd (Ranch 12) | 3/21/26 | 89.0 3.7 | 1522 | 47.0 1.1 | 0059 | 46.7 4.1 | 61 | 96 2 | 17 2 | 1.6 | 13.2 4.1 | 1414 | 0.00 | 28.30 | - | - | 30 |
| Guerneville (Laughlin Rd) | 3/21/26 | 90.5 3.3 | 1447 | 45.2 1.0 | 0711 | 44.8 4.6 | 62 | 98 0 | 15 2 | 2.0 | 19.4 9.4 | 1221 | 0.00 | 39.24 | - | - | 0 |
| Korbel (Winery) | 3/21/26 | 89.2 5.2 | 1415 | 47.3 0.6 | 0725 | 46.6 4.3 | 62 | 100 0 | 16 4 | 2.4 | 19.9 8.5 | 1317 | 0.00 | 36.61 | - | - | 20 |
| Forestville (Shone Farms) | 3/21/26 | 89.9 3.8 | 1440 | 47.4 1.5 | 0048 | 47.1 3.6 | 56 | 91 2 | 18 4 | 3.0 | 19.6 10.5 | 1527 | 0.00 | 30.31 | 0.179 0.015 | 481 11 | 0 |
| Forestville-NE (Ranch 30) | 3/21/26 | 88.8 3.1 | 1324 | 47.1 0.1 | 0059 | 50.0 3.3 | 65 | 97 1 | 23 3 | 2.8 | 20.8 11.1 | 1359 | 0.00 | 28.46 | 0.182 0.012 | 496 10 | 30 |
| Green Valley Vineyard | 3/21/26 | 88.2 2.9 | 1530 | 47.7 1.3 | 0059 | 47.7 2.0 | 58 | 91 8 | 19 2 | 2.5 | 15.6 4.8 | 1716 | 0.00 | 35.04 | 0.077 0.018 | 122 118 | 0 |
| Green Valley (Sanchietti) | 3/21/26 | 89.8 2.1 | 1610 | 45.1 2.4 | 0723 | - | - | - | - | - | - | - | - | - | - | - | 0 |
| Keefer Ranch (Green Valley) | 3/21/26 | 88.9 3.2 | 1512 | 44.7 0.9 | 0058 | 49.6 2.2 | 68 | 99 0 | 23 5 | - | - | - | 0.00 | 31.31 | - | - | 0 |
| Graton-South (Mill Station Rd) | 3/21/26 | 86.9 2.6 | 1617 | 44.3 1.3 | 0059 | 50.0 0.4 | 68 | 98 0 | 21 5 | 0.6 | 7.6 1.2 | 1601 | 0.00 | 27.62 | - | - | 0 |
| Occidental (Horseshoe Bend) | 3/21/26 | 83.8 3.0 | 1440 | 51.3 6.5 | 2311 | 47.4 1.5 | - | 90 21 | 30 2 | - | - | - | 0.00 | 32.02 | - | - | 90 |
| Sexton Valley (Jacqueline's Blk) | 3/21/26 | 85.3 5.5 | 1527 | 45.4 0.7 | 0056 | 51.5 1.0 | 71 | 99 1 | 32 3 | 1.8 | 12.0 1.4 | 1640 | 0.00 | 15.31 | - | - | 0 |
| Sebastopol Hills (Burnside Rd) | 3/21/26 | 82.1 4.9 | 1542 | 53.8 5.4 | 0030 | 50.2 0.5 | 58 | 89 28 | 35 4 | 2.3 | 11.6 0.4 | 1659 | 0.00 | 27.89 | - | - | 0 |
| Seaview/Fort Ross (Hirsch) | 3/21/26 | 77.5 7.2 | 1317 | 51.8 17.2 | 2349 | 41.8 4.5 | 43 | 59 21 | 28 15 | 6.3 | 21.0 9.0 | 0350 | 0.00 | 48.40 | 0.199 0.006 | 527 23 | 100 |
| Max | 90.5 | - | 53.8 | - | 57.2 | 88 | 100 | 44 | 6.3 | 21.0 | - | 0.00 | 48.40 | 0.199 | 527 | - | |
| Avg | - | - | - | - | 48.7 | 63 | - | - | 2.4 | - | - | - | - | - | - | - | |
| Min | 77.5 | - | 44.3 | - | 41.8 | 43 | 59 | 0 | 0.6 | 7.6 | - | 0.00 | 6.96 | 0.033 | 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Upper Rincon Valley | 3/21/26 | 85.4 4.2 | 1511 | 51.8 10.8 | 0010 | 43.9 4.4 | 69 7 | 23 4 | 2.7 0.3 | 13.0 4.2 | 1554 | SW | 221 | 0.00 | 5.41 | 0.171 0.009 | 510 22 | 0 0 |
| Lower Bennett Valley | 3/21/26 | 84.9 5.4 | 1418 | 43.6 1.1 | 0101 | 49.2 3.2 | 100 0 | 27 3 | 1.9 0.6 | 11.6 3.8 | 1727 | NNW | 348 | 0.00 | 22.06 | 0.158 0.006 | 487 13 | 0 0 |
| Kenwood (Wildwood) | 3/21/26 | 84.6 6.6 | 1429 | 49.2 0.1 | 0053 | 49.6 4.2 | 87 9 | 29 2 | 2.8 0.0 | 16.6 7.5 | 1758 | NNW | 332 | 0.00 | 26.90 | 0.152 0.002 | 442 17 | 50 20 |
| Sonoma Valley (Bedrock) | 3/21/26 | 84.4 6.8 | 1556 | 48.2 1.0 | 0640 | 46.9 6.1 | 95 2 | 24 2 | - | - | - | - | 0.00 | 23.11 | - | - | 80 20 |
| Sonoma-West (Arnold) | 3/21/26 | 85.5 7.5 | 1342 | 45.2 2.6 | 0047 | 50.6 3.1 | 96 1 | 34 10 | 2.4 0.7 | 15.0 6.0 | 1430 | SW | 222 | 0.00 | 17.20 | 0.177 0.011 | 544 28 | 50 20 |
| Sonoma Valley HS | 3/21/26 | 83.4 8.5 | 1347 | 48.5 1.0 | 0057 | 53.5 3.7 | 100 0 | 44 18 | 1.8 0.9 | 10.7 4.6 | 1757 | SW | 221 | 0.00 | 5.29 | 0.149 0.012 | 487 25 | 20 20 |
| Sonoma East (Bundschu01) | 3/21/26 | 82.3 8.8 | 1401 | 46.1 2.6 | 0049 | 50.8 4.5 | 94 5 | 38 17 | 2.8 1.3 | 18.6 11.6 | 1518 | WSW | 239 | 0.00 | 17.48 | 0.159 0.014 | 503 30 | 50 20 |
| Schellville (Sasaki) | 2/4/26 | 70.2 | 1502 | 39.9 | 0001 | 48.4 | 98 | 51 | 2.9 | 11.8 | 1113 | NE | 34 | 0.00 | 0.00 | - | - | 0 |
| Sonoma-SE (Napoli) | 3/21/26 | 83.0 10.5 | 1442 | 47.3 1.7 | 0059 | 50.8 4.1 | 95 2 | 36 17 | 1.5 0.8 | 16.8 9.1 | 1545 | WSW | 241 | 0.00 | 14.95 | - | - | 0 0 |
| Ricci Vineyards (Carneros) | 3/21/26 | 83.3 8.0 | 1356 | 49.3 1.1 | 0059 | 50.9 3.2 | 97 0 | 35 13 | 3.8 1.6 | 18.8 10.0 | 1716 | W | 279 | 0.00 | 18.75 | 0.171 0.008 | 516 30 | 0 0 |
| Carneros (Ranch 71) | 3/21/26 | 82.1 8.5 | 1401 | 52.1 6.7 | 2340 | 51.0 4.2 | 89 3 | 37 15 | 4.3 2.3 | 17.4 6.8 | 1724 | WNW | 285 | 0.00 | 16.20 | 0.166 0.009 | 495 30 | 50 20 |
| Carneros Upper (Ranch 81) | 3/21/26 | 83.3 7.6 | 1454 | 53.1 7.8 | 0042 | 51.3 2.9 | - | - | 6.8 3.8 | 24.8 12.4 | 1721 | W | 267 | - | - | - | - | 100 10 |
| Carneros Lower (Ranch 81) | 3/21/26 | 89.2 10.2 | 1439 | 47.6 2.0 | 0059 | 51.8 0.1 | 100 0 | 0 0 | 1.4 0.7 | 12.4 5.5 | 1755 | WNW | 294 | 0.00 | 16.94 | 0.120 0.007 | 374 28 | 0 0 |
| Rohnert Park-West (Stony Point) | 3/21/26 | 79.4 9.2 | 1517 | 42.6 0.8 | 0059 | 50.9 0.9 | 98 0 | 47 18 | 2.2 1.1 | 13.1 1.6 | 1412 | SW | 215 | 0.00 | 6.33 | - | - | 0 0 |
| Cartograph Wines Base | 3/21/26 | 76.2 10.7 | 1450 | 49.2 7.1 | 2358 | 51.8 0.5 | 92 17 | 50 18 | 4.0 1.7 | 17.2 3.2 | 1642 | SSW | 195 | 0.00 | 22.43 | 0.148 0.016 | 500 15 | 0 0 |
| Cartograph Wines Remote | 3/21/26 | 77.9 10.2 | 1128 | 42.6 2.4 | 0057 | - | - | - | - | - | - | - | - | - | - | - | 60 10 |
| Rice-Spivak Vineyard | 3/21/26 | 77.0 11.8 | 1444 | 37.1 0.9 | 0023 | - | - | - | - | - | - | - | - | - | - | - | 0 0 |
| Penngrove (Asellus) | 3/21/26 | 80.6 9.9 | 1236 | 41.9 2.6 | 0054 | 49.0 1.9 | 96 1 | 43 23 | 2.1 0.8 | 10.6 3.0 | 1649 | SSE | 161 | 0.00 | 45.71 | - | - | 0 0 |
| Petaluma (Ranch 10) | 3/21/26 | 82.8 10.5 | 1302 | 44.3 0.0 | 0054 | 47.6 2.6 | 95 5 | 31 14 | 2.6 1.5 | 14.6 5.4 | 1612 | WNW | 284 | 0.00 | 15.67 | 0.158 0.004 | 459 18 | 50 20 |
| Max | 89.2 | - | 53.1 | - | 53.5 | 100 | 50 | 6.8 | 24.8 | - | - | 0.00 | 45.71 | 0.177 | 544 | - | |
| Avg | - | - | - | - | 50.0 | - | - | 2.9 | - | - | - | - | - | - | - | - | |
| Min | 76.2 | - | 37.1 | - | 43.9 | 69 | 0 | 1.4 | 10.6 | - | - | 0.00 | 5.29 | 0.120 | 374 | - |