| 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) | 12/17/25 | 61.5 2.1 | 1202 | 48.0 1.0 | 2210 | 49.5 4.1 | 86 | 100 0 | 59 27 | 3.8 | 16.8 0.5 | 0908 | NW | 309 | 0.24 | 10.12 | - | - | 0 0 |
| Rockpile Upper (Cooley) | 12/17/25 | 57.6 0.6 | 1440 | 46.8 2.9 | 2110 | 49.5 5.7 | 90 | 100 0 | 66 25 | 7.1 | 25.0 0.4 | 0917 | NW | 318 | 0.16 | 10.28 | 0.048 0.035 | 257 201 | 0 0 |
| Cloverdale-East (Ranch 83) | 12/17/25 | 66.5 11.4 | 1235 | 43.0 3.2 | 2350 | -1.6 15.1 | - | - | - | 1.6 | 10.1 0.8 | 1236 | W | 265 | 0.18 | 8.02 | 0.053 0.031 | 204 147 | 0 0 |
| Cloverdale-SE (Ranch 38) | 12/17/25 | 66.8 11.6 | 1305 | 48.4 4.8 | 2340 | 51.4 3.0 | 89 | 100 0 | 58 33 | 3.1 | 12.3 1.4 | 1243 | S | 176 | 0.20 | 8.63 | 0.044 0.032 | 185 134 | 0 0 |
| Geyserville-North (Hoffman) | 12/17/25 | 67.1 11.0 | 1313 | 41.6 1.2 | 2345 | 47.2 0.5 | 88 | 97 0 | 60 20 | 1.4 | 9.0 1.3 | 1321 | NNW | 342 | 0.00 | 0.00 | 0.043 0.028 | 179 126 | 0 0 |
| Geyserville (Ranch 3) | 12/17/25 | 65.8 10.3 | 1305 | 43.3 2.6 | 2351 | 51.1 3.7 | 91 | 100 0 | 54 26 | 2.1 | 10.3 1.8 | 1324 | NW | 326 | 0.16 | 7.90 | 0.043 0.027 | 177 113 | 0 0 |
| Geyserville-East (Ranch 40) | 12/17/25 | 67.3 12.9 | 1314 | 48.8 6.9 | 2349 | 52.0 4.4 | 90 | 100 0 | 57 34 | 3.3 | 12.6 0.3 | 0447 | SE | 132 | 0.17 | 8.24 | 0.045 0.031 | 196 135 | 0 0 |
| Geyserville-South (Nervo Station) | 12/17/25 | 66.2 10.7 | 1343 | 47.2 5.5 | 2335 | - | - | - | - | 1.7 | 10.8 3.0 | 1406 | NW | 305 | 0.12 | 6.37 | - | - | 0 0 |
| Jimtown-North (Piccolo Ranch 15) | 12/17/25 | 66.7 11.3 | 1401 | 42.8 3.5 | 2358 | 47.2 0.5 | 82 | 100 0 | 52 25 | 1.2 | 7.9 2.9 | 1507 | WNW | 289 | 0.15 | 8.07 | 0.026 0.010 | 118 53 | 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) | 12/17/25 | 68.8 12.1 | 1357 | 41.7 3.0 | 2308 | 51.5 4.4 | 92 | 100 0 | 52 24 | 1.2 | 10.4 3.7 | 1408 | NW | 317 | 0.10 | 8.46 | 0.034 0.017 | 136 70 | 0 0 |
| N Chalk Hill Rd (Ranch 63) | 12/17/25 | 65.2 9.6 | 1433 | 41.9 3.5 | 2334 | 50.4 4.2 | 94 | 100 0 | 56 23 | 1.4 | 10.5 2.6 | 1407 | W | 281 | 0.11 | 8.53 | 0.029 0.013 | 121 58 | - |
| Knights Valley (Bavarian Lion) | 12/17/25 | 65.9 8.9 | 1314 | 43.6 5.4 | 2134 | 50.4 4.5 | 90 | 98 1 | 53 20 | 1.7 | 8.5 3.6 | 1438 | W | 281 | 0.17 | 8.83 | 0.037 0.015 | 153 61 | - |
| Upper Dry Creek Valley | 12/17/25 | 66.2 10.1 | 1306 | 42.1 0.4 | 2359 | 49.9 3.0 | 89 | 98 0 | 53 27 | 1.8 | 12.4 2.8 | 1356 | W | 281 | 0.19 | 8.41 | 0.049 0.033 | 203 140 | - |
| Lower Dry Creek Valley | 12/17/25 | 67.8 11.6 | 1404 | 41.0 0.2 | 0001 | 51.0 3.9 | 93 | 100 0 | 49 28 | 1.8 | 9.1 0.1 | 1421 | N | 355 | 0.12 | 8.65 | 0.037 0.020 | 151 82 | 0 0 |
| Max | 68.8 | - | 48.8 | - | 52.0 | 94 | 100 | 66 | 7.1 | 25.0 | - | - | 0.24 | 10.28 | 0.053 | 257 | - | |
| Avg | - | - | - | - | 46.1 | 89 | - | - | 2.4 | - | - | - | - | - | - | - | - | |
| Min | 57.6 | - | 41.0 | - | -1.6 | 82 | 97 | 49 | 1.2 | 7.9 | - | - | 0.00 | 0.00 | 0.026 | 118 | - |
| 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) | 12/17/25 | 69.3 12.2 | 1335 | 42.7 1.9 | 2353 | - | - | 100 0 | 50 25 | 0.5 | 9.3 1.7 | 1533 | 0.11 | 2.49 | - | - | 0 |
| Windsor-NW (Ranch 8) | 12/17/25 | 68.7 10.2 | 1346 | 44.3 3.2 | 2357 | 49.2 5.1 | 83 | 87 1 | 58 20 | 1.0 | 9.6 1.5 | 1515 | 0.15 | 8.97 | 0.034 0.012 | 138 42 | - |
| Windsor-East (Ranch 16) | 12/17/25 | 68.5 10.5 | 1457 | 43.0 4.1 | 2148 | 52.1 5.9 | 92 | 100 0 | 51 22 | 1.7 | 9.9 1.4 | 0441 | 0.10 | 6.64 | 0.038 0.017 | 158 70 | 0 |
| Mark West-North (Ranch 14) | 12/17/25 | 68.6 10.8 | 1512 | 44.1 4.0 | 2316 | 51.4 6.0 | 90 | 98 1 | 51 17 | 0.7 | 5.3 0.7 | 1353 | 0.10 | 7.63 | 0.003 0.001 | 0 0 | 0 |
| Windsor-SE (Silk Rd) | 12/17/25 | 67.0 9.1 | 1408 | 40.9 2.3 | 2342 | 50.7 5.0 | 92 | 100 0 | 52 21 | 1.0 | 7.2 0.4 | 1119 | 0.13 | 2.06 | 0.032 0.010 | 136 42 | 0 |
| Fulton-NW (Ranch 5) | 12/17/25 | 66.6 9.2 | 1245 | 42.3 3.0 | 2322 | 11.3 1.9 | 42 | 100 0 | 3 0 | 1.5 | 7.2 0.3 | 1402 | 0.11 | 7.73 | 0.047 0.021 | 147 42 | 0 |
| Windsor-South (Laughlin Rd) | 12/17/25 | 68.7 8.5 | 1254 | 42.2 2.8 | 2353 | -3.2 13.5 | 37 | 100 0 | 0 0 | - | - | - | 0.12 | 7.28 | - | - | - |
| Fulton-SE (Barnes Rd) | 12/17/25 | 66.1 8.4 | 1254 | 42.9 2.9 | 2357 | 52.4 6.6 | 90 | 98 1 | 65 10 | 1.4 | 7.8 0.4 | 1026 | 0.12 | 7.24 | - | - | - |
| Fulton-SW (Ranch 21) | 12/17/25 | 66.3 8.9 | 1252 | 41.6 2.3 | 2358 | -14.7 4.1 | 34 | 100 0 | 0 0 | 1.7 | 7.6 0.6 | 1139 | 0.13 | 7.63 | 0.049 0.015 | 133 13 | - |
| Santa Rosa-NW (Goldfields) | 12/17/25 | 70.3 10.8 | 1306 | 41.7 2.2 | 2358 | 52.0 6.1 | 91 | 100 0 | 51 19 | 1.7 | 7.5 0.5 | 1140 | 0.15 | 7.94 | 0.026 0.003 | 101 7 | - |
| Goldfields Remote | 12/17/25 | 68.1 10.4 | 1323 | 40.9 1.6 | 2259 | - | - | - | - | - | - | - | - | - | - | - | 0 |
| NW Santa Rosa (Piner Road) | 12/17/25 | 66.2 9.1 | 1428 | 41.3 2.4 | 2359 | 53.0 6.1 | 96 | 100 0 | 73 10 | 0.9 | 5.0 1.1 | 1702 | 0.14 | 6.20 | - | - | - |
| River Rd South (Denner Ranch) | 12/17/25 | 68.3 9.0 | 1352 | 42.7 3.7 | 2257 | 52.1 5.9 | 92 | 100 0 | 56 15 | 2.1 | 8.8 0.0 | 1131 | - | - | - | - | - |
| West Santa Rosa (LOV Vineyard) | 12/17/25 | 69.3 11.6 | 1414 | 42.8 3.2 | 2359 | 52.2 6.8 | 92 | 100 0 | 58 15 | 0.9 | 6.1 0.9 | 1144 | 0.01 | 8.13 | 0.004 0.001 | 0 0 | 0 |
| Guerneville Rd (Prokopakis) | 12/17/25 | 70.8 12.1 | 1413 | 43.3 3.4 | 0001 | 52.3 6.6 | 91 | 100 1 | 55 15 | - | - | - | 0.13 | 7.32 | - | - | - |
| Guerneville Rd West (Balletto) | 12/17/25 | 67.3 9.6 | 1438 | 41.9 3.1 | 2359 | 52.5 6.4 | 94 | 100 0 | 62 15 | 1.4 | 8.2 0.3 | 1700 | 0.14 | 6.02 | - | - | - |
| Sanchietti Ranch | 12/17/25 | 66.9 8.9 | 1415 | 42.3 2.2 | 2359 | 53.9 6.6 | - | 100 0 | 68 14 | 2.6 | 10.5 2.0 | 1343 | 0.13 | 7.15 | - | - | - |
| Occidental Rd (Sebastopol) | 12/17/25 | 67.9 10.0 | 1428 | 41.2 2.3 | 2359 | 53.8 6.1 | 96 | 100 0 | 53 25 | 1.5 | 9.0 1.8 | 1520 | 0.09 | 5.92 | - | - | - |
| Lower Westside Rd (Ranch 12) | 12/17/25 | 67.4 10.3 | 1238 | 43.5 3.2 | 2346 | 52.2 6.0 | 96 | 100 0 | 73 1 | 0.4 | 5.0 0.1 | 1120 | 0.16 | 8.66 | - | - | 0 |
| Guerneville (Laughlin Rd) | 12/17/25 | 69.6 8.1 | 1318 | 48.0 3.9 | 2358 | 52.8 4.6 | 93 | 98 0 | 57 8 | 0.7 | 6.8 2.0 | 1138 | 0.20 | 9.54 | - | - | - |
| Korbel (Winery) | 12/17/25 | 66.4 7.7 | 1431 | 48.7 6.1 | 2359 | 52.9 5.6 | 95 | 100 0 | 60 10 | 0.9 | 7.5 1.7 | 1123 | 0.20 | 9.69 | - | - | - |
| Forestville (Shone Farms) | 12/17/25 | 67.0 8.3 | 1514 | 45.7 6.2 | 2210 | 52.2 6.2 | 93 | 99 1 | 65 12 | 1.3 | 7.0 1.4 | 2324 | 0.16 | 9.42 | 0.036 0.014 | 148 59 | 0 |
| Forestville-NE (Ranch 30) | 12/17/25 | 70.6 12.9 | 1304 | 45.1 6.2 | 2240 | 52.6 6.4 | 96 | 100 0 | 65 13 | 1.1 | 9.0 2.6 | 1310 | 0.15 | 8.84 | 0.037 0.015 | 165 70 | - |
| Green Valley Vineyard | 12/17/25 | 67.4 9.2 | 1538 | 43.4 2.8 | 2359 | 52.3 6.0 | 92 | 99 0 | 57 15 | 1.7 | 10.3 5.5 | 1402 | 0.17 | 10.17 | 0.006 0.004 | 0 0 | - |
| Green Valley (Sanchietti) | 12/17/25 | 68.7 8.1 | 1258 | 42.2 2.0 | 2355 | - | - | - | - | - | - | - | - | - | - | - | - |
| Keefer Ranch (Green Valley) | 12/17/25 | 66.6 7.7 | 1528 | 41.4 0.8 | 2359 | 51.8 4.6 | 94 | 100 0 | 63 14 | - | - | - | 0.15 | 8.79 | - | - | - |
| Graton-South (Mill Station Rd) | 12/17/25 | 67.8 7.3 | 1359 | 42.4 3.6 | 2359 | 53.0 7.2 | 92 | 100 0 | 58 12 | 0.4 | 5.9 0.6 | 1353 | 0.22 | 8.60 | - | - | 0 |
| Occidental (Horseshoe Bend) | 12/17/25 | 64.5 3.3 | 1512 | 48.6 5.0 | 2330 | 53.9 5.7 | - | 100 0 | 61 9 | - | - | - | 0.35 | 8.82 | - | - | - |
| Sexton Valley (Jacqueline's Blk) | 12/17/25 | 67.2 7.5 | 1244 | 42.9 3.1 | 2204 | 53.5 6.7 | 94 | 100 0 | 68 7 | 1.1 | 9.3 3.0 | 1411 | 0.00 | 6.98 | - | - | - |
| Sebastopol Hills (Burnside Rd) | 12/17/25 | 64.0 5.4 | 1358 | 46.5 5.6 | 2329 | 54.3 7.6 | 94 | 100 0 | 69 8 | 2.7 | 12.3 6.9 | 0433 | 0.26 | 7.72 | - | - | - |
| Seaview/Fort Ross (Hirsch) | 12/17/25 | 59.4 2.3 | 1224 | 49.2 5.0 | 2353 | 50.9 5.2 | 89 | 97 0 | 69 16 | 2.8 | 15.9 6.1 | 0528 | 0.56 | 13.84 | 0.045 0.028 | 209 152 | - |
| Max | 70.8 | - | 49.2 | - | 54.3 | 96 | 100 | 73 | 2.8 | 15.9 | - | 0.56 | 13.84 | 0.049 | 209 | - | |
| Avg | - | - | - | - | 46.6 | 86 | - | - | 1.4 | - | - | - | - | - | - | - | |
| Min | 59.4 | - | 40.9 | - | -14.7 | 34 | 87 | 0 | 0.4 | 5.0 | - | 0.00 | 2.06 | 0.003 | 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 | 12/17/25 | 63.5 0.7 | 1447 | 47.5 2.2 | 2351 | 52.7 3.5 | 98 0 | 64 1 | 2.1 1.2 | 10.4 4.1 | 2237 | NNE | 33 | 0.00 | 5.40 | 0.031 0.003 | 137 15 | - |
| Lower Bennett Valley | 12/17/25 | 67.6 6.7 | 1317 | 39.4 1.4 | 2351 | 52.6 6.5 | 100 0 | 63 3 | 2.5 0.8 | 10.9 2.4 | 0225 | SW | 222 | 0.16 | 6.77 | 0.038 0.010 | 161 43 | 0 0 |
| Kenwood (Wildwood) | 12/17/25 | 65.9 3.4 | 1323 | 42.6 4.4 | 2348 | 51.2 6.2 | 100 0 | 65 1 | 1.2 0.3 | 9.5 1.5 | 1516 | NW | 316 | 0.28 | 7.26 | 0.030 0.001 | 122 5 | - |
| Sonoma Valley (Bedrock) | 12/17/25 | 65.5 7.4 | 1359 | 41.0 3.6 | 2344 | 50.3 7.0 | 99 0 | 65 1 | - | - | - | - | 0.24 | 6.95 | - | - | - |
| Sonoma-West (Arnold) | 12/17/25 | 65.6 5.0 | 1452 | 41.1 0.3 | 2347 | 51.2 6.2 | 100 0 | 60 2 | 1.6 0.5 | 11.8 4.5 | 1412 | SSW | 213 | 0.44 | 4.88 | 0.033 0.004 | 137 4 | - |
| Sonoma Valley HS | 12/17/25 | 65.7 6.6 | 1503 | 44.0 3.0 | 2315 | 52.6 7.0 | 100 0 | 68 2 | 1.1 0.3 | 8.3 2.9 | 1543 | WSW | 248 | 0.00 | 4.68 | 0.025 0.002 | 109 22 | - |
| Sonoma East (Bundschu01) | 12/17/25 | 66.0 6.4 | 1506 | 40.3 2.1 | 2329 | 51.5 7.3 | 98 0 | 61 2 | 2.7 1.2 | 11.0 2.4 | 1228 | S | 176 | 0.00 | 0.13 | 0.022 0.008 | 90 51 | - |
| Schellville (Sasaki) | 12/8/25 | 48.2 0.5 | 1512 | 42.7 0.1 | 0740 | 42.6 0.2 | 95 1 | 83 0 | 1.2 0.0 | 9.8 2.3 | 1356 | NE | 55 | 0.00 | 4.40 | - | - | 0 0 |
| Sonoma-SE (Napoli) | 12/17/25 | 66.6 4.7 | 1520 | 42.5 3.3 | 2335 | 51.5 7.4 | 97 0 | 60 2 | 2.0 0.9 | 11.1 2.7 | 1209 | S | 180 | 0.23 | 4.70 | - | - | 0 0 |
| Ricci Vineyards (Carneros) | 12/17/25 | 65.9 5.8 | 1458 | 41.8 1.3 | 2331 | 51.0 7.1 | 98 1 | 60 0 | 3.4 1.0 | 13.9 1.1 | 1258 | S | 186 | 0.34 | 5.23 | 0.034 0.001 | 149 6 | - |
| Carneros (Ranch 71) | 12/17/25 | 64.4 7.5 | 1515 | 47.1 6.9 | 2358 | 52.3 8.2 | 100 0 | 63 5 | 4.2 1.1 | 12.8 3.2 | 1546 | W | 280 | 0.23 | 4.71 | 0.025 0.004 | 110 36 | 0 0 |
| Carneros Upper (Ranch 81) | 12/17/25 | 64.4 5.2 | 1518 | 46.3 5.8 | 2358 | 33.6 1.0 | - | - | 5.6 2.3 | 17.3 5.6 | 1318 | S | 191 | - | - | - | - | - |
| Carneros Lower (Ranch 81) | 12/17/25 | 63.0 5.2 | 1525 | 42.3 1.2 | 2328 | 5.6 38.7 | 100 0 | 0 65 | 1.8 0.2 | 13.4 4.5 | 1320 | S | 171 | 0.28 | 5.05 | 0.047 0.022 | 68 40 | - |
| Rohnert Park-West (Stony Point) | 12/17/25 | 65.2 6.5 | 1407 | 39.8 1.3 | 2256 | 52.0 6.4 | 100 1 | 68 7 | 2.5 0.5 | 13.2 0.0 | 1408 | WSW | 240 | 0.00 | 1.56 | - | - | - |
| Cartograph Wines Base | 12/17/25 | 63.6 6.3 | 1357 | 46.5 6.1 | 2355 | 53.8 7.4 | 100 0 | 78 4 | 4.1 1.5 | 17.3 1.0 | 0643 | SW | 223 | 0.23 | 6.91 | 0.038 0.012 | 190 62 | - |
| Cartograph Wines Remote | 12/17/25 | 62.7 4.7 | 1156 | 41.9 3.3 | 2220 | - | - | - | - | - | - | - | - | - | - | - | - |
| Rice-Spivak Vineyard | 12/17/25 | 64.9 5.2 | 1357 | 39.0 1.8 | 2127 | - | - | - | - | - | - | - | - | - | - | - | - |
| Penngrove (Asellus) | 12/17/25 | 66.3 5.3 | 1414 | 39.2 0.4 | 2354 | 50.9 6.6 | 98 1 | 59 1 | 1.7 2.4 | 8.8 7.1 | 1304 | W | 262 | 0.00 | 0.10 | - | - | 0 0 |
| Roger's Creek (Ranch 50) | 12/17/25 | 63.6 5.5 | 1316 | 47.6 8.9 | 2335 | 51.5 7.1 | 100 0 | 65 6 | 3.0 1.4 | 15.7 3.1 | 1505 | W | 264 | 0.31 | 6.19 | 0.028 0.002 | 118 5 | 0 0 |
| Petaluma (Ranch 10) | 12/17/25 | 70.3 9.4 | 1314 | 40.4 1.3 | 2353 | 50.5 6.3 | 100 0 | 53 7 | 1.0 0.5 | 10.6 4.2 | 1407 | W | 268 | 0.22 | 4.51 | 0.038 0.011 | 142 24 | 0 0 |
| Max | 70.3 | - | 47.6 | - | 53.8 | 100 | 78 | 5.6 | 17.3 | - | - | 0.44 | 7.26 | 0.047 | 190 | - | |
| Avg | - | - | - | - | 47.9 | - | - | 2.5 | - | - | - | - | - | - | - | - | |
| Min | 62.7 | - | 39.0 | - | 5.6 | 97 | 0 | 1.0 | 8.3 | - | - | 0.00 | 0.10 | 0.022 | 68 | - |