| 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) | 1/31/26 | 70.2 0.6 | 1349 | 51.2 2.9 | 0509 | 38.1 2.4 | 48 | 65 8 | 24 1 | 1.6 | 8.5 1.3 | 2133 | N | 350 | 0.00 | 29.13 | - | - | 0 0 |
| Rockpile Upper (Cooley) | 1/31/26 | 66.8 0.5 | 1403 | 50.7 0.2 | 2335 | 33.6 3.9 | 41 | 68 1 | 24 0 | 4.6 | 18.8 9.6 | 2205 | NW | 317 | 0.00 | 29.84 | 0.092 0.010 | 270 34 | 0 0 |
| Cloverdale-East (Ranch 83) | 1/31/26 | 71.4 0.5 | 1505 | 36.2 0.0 | 0001 | 39.3 0.6 | - | - | - | 4.3 | 18.8 0.8 | 0907 | N | 4 | 0.00 | 25.21 | 0.064 0.006 | 239 24 | 0 0 |
| Cloverdale-SE (Ranch 38) | 1/31/26 | 72.3 1.2 | 1435 | 43.2 0.6 | 0705 | 40.4 1.8 | 61 | 86 4 | 30 7 | 3.8 | 23.4 0.6 | 0935 | SSE | 162 | 0.00 | 26.66 | 0.063 0.006 | 227 32 | 0 0 |
| Geyserville-North (Hoffman) | 1/31/26 | 70.4 0.3 | 1456 | 33.5 1.8 | 0454 | 41.0 0.9 | 78 | 96 0 | 27 8 | 1.5 | 8.4 0.3 | 0933 | NNW | 341 | 0.00 | 25.50 | 0.056 0.007 | 210 31 | 0 0 |
| Geyserville (Ranch 3) | 1/31/26 | 71.2 1.2 | 1458 | 34.4 2.6 | 0512 | 41.5 1.2 | 80 | 100 0 | 28 5 | 1.8 | 8.5 1.6 | 1123 | WNW | 283 | 0.00 | 25.55 | 0.054 0.006 | 220 27 | 0 0 |
| Geyserville-East (Ranch 40) | 1/31/26 | 72.7 2.3 | 1317 | 43.2 0.0 | 0510 | 43.5 1.7 | 68 | 95 1 | 30 4 | 2.1 | 10.5 3.2 | 2123 | SSE | 159 | 0.00 | 25.99 | 0.062 0.009 | 239 29 | 0 0 |
| Geyserville-South (Nervo Station) | 1/31/26 | 68.9 1.9 | 1433 | 37.6 1.8 | 0701 | - | - | - | - | 0.8 | 6.4 0.7 | 0949 | NNW | 346 | 0.00 | 19.54 | - | - | 0 0 |
| Jimtown-North (Piccolo Ranch 15) | 1/31/26 | 72.8 0.7 | 1417 | 32.8 2.5 | 0605 | 40.7 0.5 | 81 | 100 0 | 27 2 | 0.8 | 5.5 0.4 | 1523 | SW | 225 | 0.00 | 23.77 | 0.048 0.004 | 205 22 | 0 0 |
| Jimtown-NE (Red Fan) | 8/26/25 | 88.9 0.8 | 1609 | 56.4 0.1 | 0146 | 53.1 1.9 | 64 | 94 2 | 20 8 | 3.5 | 13.4 0.5 | 1919 | S | 169 | 0.00 | 0.00 | 0.187 0.011 | 528 30 | 0 0 |
| HWY 128/Chalk Hill Rd (Landslide) | 1/31/26 | 72.2 1.1 | 1402 | 32.0 2.9 | 0720 | 41.2 0.4 | 84 | 100 0 | 33 3 | 0.8 | 6.4 0.7 | 1412 | SW | 235 | 0.00 | 22.94 | 0.051 0.004 | 205 17 | 0 0 |
| N Chalk Hill Rd (Ranch 63) | 1/31/26 | 68.7 1.5 | 1441 | 31.7 2.8 | 0730 | 40.8 0.4 | 83 | 100 0 | 37 2 | 0.7 | 8.1 1.8 | 2144 | SSE | 158 | 0.00 | 24.29 | 0.051 0.004 | 208 20 | - |
| Knights Valley (Bavarian Lion) | 1/31/26 | 70.0 0.7 | 1352 | 31.0 2.0 | 0600 | 39.8 0.2 | 83 | 98 0 | 30 2 | 1.8 | 10.4 1.6 | 1400 | SE | 135 | 0.00 | 22.82 | 0.061 0.002 | 246 9 | - |
| Upper Dry Creek Valley | 1/31/26 | 70.4 1.3 | 1403 | 36.0 1.6 | 0716 | 41.9 0.2 | 81 | 98 0 | 22 1 | 1.0 | 5.1 0.1 | 1301 | SE | 143 | 0.00 | 27.62 | 0.058 0.006 | 244 25 | - |
| Lower Dry Creek Valley | 1/31/26 | 72.5 1.4 | 1324 | 34.6 2.1 | 0443 | 42.4 0.7 | 83 | 100 0 | 29 0 | 0.8 | 6.6 0.2 | 1455 | SE | 127 | 0.00 | 27.19 | 0.053 0.003 | 222 24 | 0 0 |
| Max | 72.8 | - | 51.2 | - | 43.5 | 84 | 100 | 37 | 4.6 | 23.4 | - | - | 0.00 | 29.84 | 0.092 | 270 | - | |
| Avg | - | - | - | - | 40.3 | 73 | - | - | 1.9 | - | - | - | - | - | - | - | - | |
| Min | 66.8 | - | 31.0 | - | 33.6 | 41 | 65 | 22 | 0.7 | 5.1 | - | - | 0.00 | 19.54 | 0.048 | 205 | - |
| 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Healdsburg-South (Sodini) | 1/31/26 | 69.0 1.8 | 1334 | 35.0 1.8 | 0729 | - | - | 100 0 | 41 2 | 0.4 | 7.7 0.0 | 2152 | 0.00 | 19.55 | - | - | 0 |
| Windsor-NW (Ranch 8) | 1/31/26 | 72.9 1.9 | 1332 | 39.0 2.2 | 0634 | 43.7 0.7 | 78 | 87 1 | 41 0 | 0.5 | 5.7 1.4 | 2031 | 0.00 | 23.60 | 0.057 0.004 | 246 17 | - |
| Windsor-East (Ranch 16) | 1/31/26 | 67.0 1.4 | 1541 | 34.2 1.8 | 0556 | 43.3 0.5 | 85 | 100 0 | 46 2 | 1.1 | 7.4 2.0 | 2151 | 0.00 | 17.44 | 0.057 0.007 | 242 20 | 0 |
| Mark West-North (Ranch 14) | 1/31/26 | 65.3 3.8 | 1539 | 35.6 1.5 | 0611 | 42.7 0.6 | 83 | 99 0 | 45 3 | 0.6 | 6.5 0.2 | 1354 | 0.00 | 19.07 | 0.006 0.002 | 0 0 | 0 |
| Windsor-SE (Silk Rd) | 1/31/26 | 66.7 1.0 | 1349 | 33.4 1.1 | 0552 | 41.7 0.5 | 85 | 100 0 | 43 1 | 0.7 | 6.2 0.8 | 1407 | 0.00 | 15.45 | 0.056 0.004 | 244 14 | 0 |
| Fulton-NW (Ranch 5) | 1/31/26 | 63.6 2.2 | 1259 | 33.2 2.0 | 0725 | 14.9 4.5 | 50 | 100 0 | 3 0 | 1.0 | 8.1 1.6 | 2137 | 0.00 | 19.05 | 0.055 0.004 | 240 7 | 0 |
| Windsor-South (Laughlin Rd) | 1/31/26 | 66.0 1.5 | 1332 | 34.9 1.4 | 0734 | 17.0 9.5 | 58 | 100 0 | 0 0 | - | - | - | 0.01 | 19.00 | - | - | - |
| Fulton-SE (Barnes Rd) | 1/31/26 | 65.0 1.8 | 1542 | 34.7 0.8 | 0734 | 43.4 0.6 | 86 | 98 0 | 53 0 | 0.6 | 6.6 1.2 | 2342 | 0.00 | 18.33 | - | - | - |
| Fulton-SW (Ranch 21) | 1/31/26 | 63.7 1.6 | 1537 | 33.8 1.2 | 0747 | -1.5 4.9 | 45 | 100 0 | 0 0 | 1.2 | 7.0 0.1 | 1404 | 0.00 | 18.60 | 0.059 0.008 | 263 15 | - |
| Santa Rosa-NW (Goldfields) | 1/31/26 | 66.0 1.7 | 1259 | 34.0 1.2 | 0731 | 43.5 0.7 | 86 | 100 0 | 47 3 | 1.1 | 8.2 0.4 | 1401 | 0.00 | 19.57 | 0.053 0.002 | 225 6 | - |
| Goldfields Remote | 1/31/26 | 64.2 2.2 | 1308 | 33.9 1.4 | 0725 | - | - | - | - | - | - | - | - | - | - | - | 0 |
| NW Santa Rosa (Piner Road) | 1/31/26 | 63.8 2.0 | 1546 | 34.0 0.7 | 0731 | 44.3 0.3 | 92 | 100 0 | 60 0 | 0.8 | 7.5 0.5 | 1349 | 0.00 | 16.84 | - | - | - |
| River Rd South (Denner Ranch) | 1/31/26 | 66.1 1.9 | 1302 | 34.6 0.4 | 0732 | 44.0 0.5 | 88 | 100 0 | 50 0 | 1.4 | 7.0 1.3 | 1334 | - | - | - | - | - |
| West Santa Rosa (LOV Vineyard) | 1/31/26 | 65.9 0.3 | 1549 | 35.4 0.3 | 0724 | 43.4 0.4 | 86 | 100 0 | 50 1 | 0.7 | 7.1 0.4 | 1414 | 0.00 | 15.79 | 0.005 0.002 | 0 0 | 0 |
| Guerneville Rd (Prokopakis) | 1/31/26 | 63.5 2.2 | 1537 | 35.9 0.8 | 0739 | 44.0 0.5 | 87 | 100 0 | 54 2 | - | - | - | 0.01 | 17.71 | - | - | - |
| Guerneville Rd West (Balletto) | 1/31/26 | 63.7 1.7 | 1537 | 34.0 1.9 | 0720 | 43.8 0.1 | 89 | 100 0 | 59 3 | 1.1 | 6.5 1.0 | 1348 | 0.00 | 17.59 | - | - | - |
| Sanchietti Ranch | 1/31/26 | 64.0 1.7 | 1543 | 35.6 1.2 | 0745 | 44.8 0.7 | - | 100 0 | 65 0 | 1.5 | 8.5 0.0 | 1408 | 0.00 | 18.47 | - | - | - |
| Occidental Rd (Sebastopol) | 1/31/26 | 64.5 1.8 | 1539 | 33.4 1.6 | 0725 | 47.4 0.2 | 100 | 100 0 | 98 1 | 1.0 | 5.9 0.7 | 1334 | 0.01 | 6.80 | - | - | - |
| Lower Westside Rd (Ranch 12) | 1/31/26 | 72.0 2.3 | 1354 | 37.4 2.2 | 0723 | 43.2 0.7 | 79 | 100 2 | 35 4 | 0.5 | 4.9 0.9 | 1440 | 0.00 | 22.96 | - | - | 0 |
| Guerneville (Laughlin Rd) | 1/31/26 | 66.1 0.3 | 1325 | 41.6 0.4 | 0743 | 46.9 0.3 | 91 | 99 0 | 59 1 | 0.5 | 4.4 0.1 | 1141 | 0.01 | 31.38 | - | - | - |
| Korbel (Winery) | 1/31/26 | 66.6 1.5 | 1505 | 42.7 0.4 | 0711 | 47.2 0.1 | 90 | 100 0 | 43 3 | 1.0 | 8.2 0.1 | 1343 | 0.01 | 28.76 | - | - | - |
| Forestville (Shone Farms) | 1/31/26 | 65.5 3.4 | 1400 | 37.2 1.2 | 0734 | 44.4 0.5 | 85 | 98 0 | 47 8 | 1.1 | 5.9 1.9 | 1952 | 0.00 | 24.37 | 0.056 0.003 | 231 17 | 0 |
| Forestville-NE (Ranch 30) | 1/31/26 | 65.9 1.6 | 1408 | 37.4 1.6 | 0723 | 45.2 0.4 | 90 | 100 0 | 51 1 | 1.0 | 7.0 1.4 | 1353 | 0.01 | 22.71 | 0.055 0.005 | 238 21 | - |
| Green Valley Vineyard | 1/31/26 | 64.9 1.2 | 1417 | 38.5 0.2 | 0752 | 44.6 0.7 | 86 | 99 0 | 45 0 | 1.6 | 6.4 0.4 | 1934 | 0.01 | 27.57 | 0.007 0.001 | 0 0 | - |
| Green Valley (Sanchietti) | 1/31/26 | 67.1 2.2 | 1426 | 35.6 2.1 | 0638 | - | - | - | - | - | - | - | - | - | - | - | - |
| Keefer Ranch (Green Valley) | 1/31/26 | 65.4 1.7 | 1425 | 34.7 1.8 | 0642 | 43.2 0.2 | 89 | 100 0 | 50 1 | - | - | - | 0.00 | 24.74 | - | - | - |
| Graton-South (Mill Station Rd) | 1/31/26 | 65.7 0.7 | 1429 | 34.1 1.1 | 0712 | 43.2 0.1 | 88 | 100 0 | 46 1 | 0.1 | 4.1 0.7 | 1421 | 0.01 | 21.92 | - | - | 0 |
| Occidental (Horseshoe Bend) | 1/31/26 | 65.4 0.2 | 1425 | 47.7 0.5 | 0602 | 44.2 2.3 | - | 94 4 | 39 4 | - | - | - | 0.01 | 16.13 | - | - | - |
| Sexton Valley (Jacqueline's Blk) | 1/31/26 | 65.7 0.5 | 1425 | 34.4 1.7 | 0730 | 43.5 0.1 | 88 | 100 0 | 52 2 | 0.9 | 6.4 0.3 | 1435 | 0.00 | 7.43 | - | - | - |
| Sebastopol Hills (Burnside Rd) | 1/31/26 | 63.5 1.3 | 1440 | 42.0 0.6 | 0800 | 46.3 1.4 | 84 | 100 0 | 56 2 | 0.9 | 7.1 0.5 | 0652 | 0.00 | 21.70 | - | - | - |
| Seaview/Fort Ross (Hirsch) | 1/31/26 | 67.9 0.2 | 1333 | 50.9 1.1 | 2148 | 36.2 5.6 | 44 | 76 4 | 32 2 | 5.4 | 16.4 4.2 | 0427 | 0.00 | 38.17 | 0.103 0.023 | 256 23 | - |
| Max | 72.9 | - | 50.9 | - | 47.4 | 100 | 100 | 98 | 5.4 | 16.4 | - | 0.01 | 38.17 | 0.103 | 263 | - | |
| Avg | - | - | - | - | 40.3 | 81 | - | - | 1.1 | - | - | - | - | - | - | - | |
| Min | 63.5 | - | 33.2 | - | -1.5 | 44 | 76 | 0 | 0.1 | 4.1 | - | 0.00 | 6.80 | 0.005 | 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 | 1/31/26 | 64.8 1.0 | 1548 | 43.3 1.8 | 0409 | 41.9 1.9 | 84 8 | 37 12 | 1.9 0.0 | 7.9 1.8 | 2124 | NNW | 348 | 0.00 | 5.41 | 0.061 0.006 | 269 20 | - |
| Lower Bennett Valley | 1/31/26 | 66.1 3.6 | 1458 | 32.1 1.6 | 0547 | 42.5 0.1 | 100 0 | 57 11 | 1.4 0.1 | 9.2 0.2 | 0958 | WNW | 294 | 0.00 | 17.66 | 0.053 0.009 | 232 30 | 0 0 |
| Kenwood (Wildwood) | 1/31/26 | 62.8 2.2 | 1544 | 34.2 2.1 | 0631 | 42.9 1.5 | 100 0 | 57 5 | 2.2 0.2 | 9.1 0.7 | 2331 | E | 83 | 0.00 | 21.27 | 0.053 0.006 | 224 19 | - |
| Sonoma Valley (Bedrock) | 1/31/26 | 63.2 1.1 | 1626 | 34.0 0.7 | 0607 | 41.6 1.2 | 99 0 | 54 3 | - | - | - | - | 0.00 | 17.18 | - | - | - |
| Sonoma-West (Arnold) | 1/31/26 | 66.0 0.5 | 1532 | 35.4 0.4 | 0556 | 42.7 1.6 | 100 0 | 51 3 | 1.2 0.5 | 5.8 4.4 | 1211 | SSE | 151 | 0.00 | 14.43 | 0.059 0.012 | 258 42 | - |
| Sonoma Valley HS | 1/31/26 | 66.1 0.5 | 1534 | 36.1 0.7 | 0558 | 44.6 0.8 | 100 0 | 58 1 | 0.5 0.5 | 4.1 4.4 | 1630 | SSE | 153 | 0.00 | 5.15 | 0.051 0.009 | 233 36 | - |
| Sonoma East (Bundschu01) | 1/31/26 | 66.6 0.2 | 1449 | 34.4 0.6 | 0604 | 42.6 0.4 | 98 0 | 51 1 | 1.2 0.7 | 6.4 5.0 | 1640 | SSW | 211 | 0.00 | 11.78 | 0.055 0.012 | 245 37 | - |
| Schellville (Sasaki) | 1/20/26 | 53.6 10.2 | 1425 | 36.7 3.9 | 0123 | 42.3 2.2 | 97 1 | 75 26 | 1.3 0.0 | 7.1 1.7 | 0937 | NNE | 26 | 0.00 | 0.00 | - | - | 0 0 |
| Sonoma-SE (Napoli) | 1/31/26 | 69.0 2.0 | 1442 | 35.6 0.3 | 0601 | 42.6 0.4 | 97 0 | 49 2 | 0.2 0.8 | 5.8 4.7 | 1033 | WNW | 284 | 0.01 | 11.06 | - | - | 0 0 |
| Ricci Vineyards (Carneros) | 1/31/26 | 67.6 1.8 | 1453 | 34.5 1.8 | 0559 | 42.7 1.3 | 98 0 | 48 3 | 2.4 0.7 | 8.5 4.7 | 1358 | SE | 129 | 0.00 | 14.07 | 0.062 0.009 | 260 37 | - |
| Carneros (Ranch 71) | 1/31/26 | 65.1 0.8 | 1450 | 46.2 6.2 | 0801 | 45.6 1.2 | 92 8 | 50 2 | 2.3 0.9 | 10.1 3.2 | 2206 | NW | 320 | 0.00 | 12.09 | 0.059 0.008 | 242 37 | 0 0 |
| Carneros Upper (Ranch 81) | 1/31/26 | 68.8 1.4 | 1449 | 45.1 3.6 | 0710 | 44.2 0.8 | - | - | 3.2 0.0 | 13.2 0.6 | 2217 | WNW | 298 | - | - | - | - | - |
| Carneros Lower (Ranch 81) | 1/31/26 | 66.9 1.4 | 1430 | 36.7 2.7 | 0554 | 17.8 16.2 | 100 0 | 0 0 | 1.2 0.2 | 9.4 0.2 | 2300 | ENE | 64 | 0.00 | 12.89 | 0.046 0.002 | 174 5 | - |
| Rohnert Park-West (Stony Point) | 1/31/26 | 63.2 1.9 | 1454 | 36.8 2.1 | 0757 | 44.4 0.5 | 100 0 | 65 5 | 1.3 0.0 | 8.8 1.2 | 1440 | ESE | 107 | 0.01 | 1.72 | - | - | - |
| Cartograph Wines Base | 1/31/26 | 62.7 1.0 | 1526 | 39.6 0.8 | 0756 | 47.1 1.3 | 100 0 | 69 3 | 1.9 0.3 | 11.7 0.2 | 2001 | W | 272 | 0.00 | 17.58 | 0.051 0.005 | 242 20 | - |
| Cartograph Wines Remote | 1/31/26 | 61.6 1.5 | 1515 | 35.9 0.1 | 0741 | - | - | - | - | - | - | - | - | - | - | - | - |
| Rice-Spivak Vineyard | 1/31/26 | 64.3 1.7 | 1441 | 33.4 1.2 | 0727 | - | - | - | - | - | - | - | - | - | - | - | - |
| Penngrove (Asellus) | 1/31/26 | 63.4 0.7 | 1520 | 35.6 0.1 | 0740 | 43.7 0.7 | 99 0 | 58 2 | 2.5 0.3 | 9.9 2.5 | 1956 | SE | 141 | 0.00 | 15.60 | - | - | 0 0 |
| Petaluma (Ranch 10) | 1/31/26 | 64.2 2.7 | 1432 | 38.6 2.8 | 0753 | 44.7 0.2 | 100 0 | 57 2 | 1.3 0.1 | 6.9 1.8 | 1526 | SW | 219 | 0.00 | 11.68 | 0.051 0.004 | 205 28 | 0 0 |
| Max | 69.0 | - | 46.2 | - | 47.1 | 100 | 69 | 3.2 | 13.2 | - | - | 0.01 | 21.27 | 0.062 | 269 | - | |
| Avg | - | - | - | - | 42.0 | - | - | 1.7 | - | - | - | - | - | - | - | - | |
| Min | 61.6 | - | 32.1 | - | 17.8 | 84 | 0 | 0.2 | 4.1 | - | - | 0.00 | 1.72 | 0.046 | 174 | - |