| 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) | 12/20/25 | 55.3 0.5 | 2358 | 50.2 1.1 | 0811 | 53.0 0.1 | 100 | 100 0 | 100 0 | 1.9 | 9.4 1.2 | 2157 | SE | 131 | 0.97 | 12.35 | - | - | 0 0 |
| Rockpile Upper (Cooley) | 12/20/25 | 54.0 0.1 | 2352 | 47.8 1.1 | 0444 | 50.9 0.5 | 100 | 100 0 | 100 0 | 5.9 | 27.2 5.5 | 2351 | S | 174 | 0.94 | 12.37 | 0.010 0.003 | 45 12 | 0 0 |
| Cloverdale-East (Ranch 83) | 12/20/25 | 58.6 0.8 | 2359 | 53.0 1.6 | 0630 | -59.6 10.0 | - | - | - | 1.3 | 11.2 5.8 | 2353 | SSE | 150 | 0.84 | 9.96 | 0.044 0.005 | 40 5 | 0 0 |
| Cloverdale-SE (Ranch 38) | 12/20/25 | 57.4 0.4 | 2328 | 52.6 1.6 | 0702 | 55.3 0.5 | 100 | 100 0 | 99 1 | 3.8 | 18.1 2.3 | 2306 | SSE | 149 | 0.88 | 10.52 | 0.009 0.000 | 37 1 | 0 0 |
| Geyserville-North (Hoffman) | 12/18/25 | 54.7 12.4 | 1442 | 38.7 2.9 | 0312 | 47.0 0.2 | 94 | 98 0 | 85 24 | 1.3 | 6.6 2.5 | 1512 | SE | 130 | 0.00 | 0.00 | 0.019 0.024 | 74 105 | 0 0 |
| Geyserville (Ranch 3) | 12/20/25 | 58.2 0.2 | 2334 | 54.3 2.0 | 0752 | 56.7 1.0 | 100 | 100 0 | 100 0 | 1.7 | 8.5 3.3 | 2357 | ESE | 108 | 0.76 | 9.39 | 0.011 0.003 | 40 7 | 0 0 |
| Geyserville-East (Ranch 40) | 12/20/25 | 57.3 0.2 | 2254 | 53.5 2.7 | 0652 | 55.8 1.0 | 100 | 100 0 | 100 0 | 5.2 | 21.0 0.9 | 2336 | SSE | 166 | 0.76 | 9.73 | 0.010 0.003 | 43 10 | 0 0 |
| Geyserville-South (Nervo Station) | 12/20/25 | 58.0 0.3 | 1524 | 54.5 2.7 | 0754 | - | - | - | - | 1.0 | 8.1 2.3 | 2356 | ESE | 117 | 0.54 | 7.48 | - | - | 0 0 |
| Jimtown-North (Piccolo Ranch 15) | 12/20/25 | 58.8 0.2 | 1355 | 55.1 2.9 | 0656 | 57.3 1.2 | 100 | 100 0 | 100 0 | 0.6 | 4.8 3.3 | 2338 | E | 98 | 0.71 | 9.46 | 0.011 0.004 | 40 13 | 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) | 12/20/25 | 59.5 0.2 | 1456 | 56.1 3.7 | 0752 | 57.2 1.4 | 99 | 100 0 | 92 1 | 0.7 | 5.0 8.3 | 2214 | NE | 46 | 0.67 | 9.83 | 0.010 0.002 | 32 6 | 0 0 |
| N Chalk Hill Rd (Ranch 63) | 12/20/25 | 56.7 0.7 | 1141 | 53.9 2.6 | 0556 | 55.4 0.8 | 100 | 100 0 | 100 0 | 1.1 | 6.1 5.4 | 2341 | SE | 139 | 0.73 | 9.90 | 0.010 0.002 | 36 0 | - |
| Knights Valley (Bavarian Lion) | 12/20/25 | 59.0 0.7 | 1235 | 55.6 4.2 | 0506 | 55.6 1.7 | 96 | 98 0 | 88 1 | 1.0 | 5.7 5.5 | 1014 | ESE | 114 | 0.57 | 10.21 | 0.014 0.003 | 50 14 | - |
| Upper Dry Creek Valley | 12/20/25 | 58.3 0.6 | 1432 | 54.0 2.1 | 0730 | 55.7 0.7 | 97 | 98 0 | 92 4 | 1.4 | 10.1 2.5 | 2326 | SSE | 150 | 0.68 | 9.98 | 0.012 0.003 | 42 7 | - |
| Lower Dry Creek Valley | 12/20/25 | 58.5 0.8 | 1414 | 55.1 3.2 | 0823 | 57.1 1.1 | 100 | 100 0 | 100 0 | 2.1 | 10.5 2.1 | 2340 | N | 355 | 0.64 | 9.92 | 0.012 0.002 | 47 5 | 0 0 |
| Max | 59.5 | - | 56.1 | - | 57.3 | 100 | 100 | 100 | 5.9 | 27.2 | - | - | 0.97 | 12.37 | 0.044 | 50 | - | |
| Avg | - | - | - | - | 45.9 | 99 | - | - | 2.1 | - | - | - | - | - | - | - | - | |
| Min | 54.0 | - | 47.8 | - | -59.6 | 96 | 98 | 88 | 0.6 | 4.8 | - | - | 0.54 | 7.48 | 0.009 | 32 | - |
| 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) | 12/20/25 | 58.8 0.5 | 1439 | 55.3 3.0 | 0753 | - | - | 100 0 | 97 1 | 0.4 | 9.9 2.8 | 2305 | 0.64 | 3.74 | - | - | 0 |
| Windsor-NW (Ranch 8) | 12/20/25 | 58.5 0.6 | 2356 | 55.0 2.9 | 0818 | 53.0 1.5 | 87 | 88 1 | 85 2 | 0.5 | 9.1 2.4 | 2321 | 0.49 | 10.11 | 0.014 0.003 | 43 3 | - |
| Windsor-East (Ranch 16) | 12/20/25 | 58.7 0.2 | 1406 | 54.8 2.2 | 0729 | 57.3 1.2 | 100 | 100 0 | 100 11 | 1.7 | 11.0 4.6 | 2219 | 0.35 | 7.56 | 0.010 0.002 | 36 5 | 0 |
| Mark West-North (Ranch 14) | 12/20/25 | 58.9 0.0 | 1407 | 54.5 2.0 | 0714 | 56.6 1.3 | 98 | 99 0 | 97 8 | 0.9 | 7.8 1.0 | 2258 | 0.40 | 8.62 | 0.001 0.001 | 0 0 | 0 |
| Windsor-SE (Silk Rd) | 12/20/25 | 58.5 0.5 | 2359 | 54.8 2.4 | 0739 | 56.8 1.1 | 99 | 100 0 | 95 1 | 1.1 | 9.2 0.4 | 2357 | 0.40 | 3.15 | 0.012 0.003 | 44 12 | 0 |
| Fulton-NW (Ranch 5) | 12/20/25 | 58.7 0.2 | 2142 | 54.5 1.8 | 0716 | -22.9 9.4 | 3 | 100 0 | 3 0 | 1.9 | 10.2 2.1 | 2253 | 0.44 | 8.72 | 0.055 0.006 | 47 12 | 0 |
| Windsor-South (Laughlin Rd) | 12/20/25 | 58.5 0.4 | 2359 | 54.4 2.1 | 0746 | -28.9 17.1 | 3 | 15 85 | 0 0 | - | - | - | 0.38 | 8.19 | - | - | - |
| Fulton-SE (Barnes Rd) | 12/20/25 | 59.0 0.0 | 1402 | 55.1 2.1 | 0713 | 56.8 1.3 | 98 | 98 1 | 96 10 | 1.8 | 12.1 0.2 | 2314 | 0.37 | 8.17 | - | - | - |
| Fulton-SW (Ranch 21) | 12/20/25 | 58.3 0.4 | 2126 | 54.3 2.0 | 0646 | -57.8 5.1 | 0 | 0 100 | 0 0 | 2.1 | 11.2 2.8 | 2215 | 0.39 | 8.51 | 0.060 0.014 | 48 7 | - |
| Santa Rosa-NW (Goldfields) | 12/19/25 | 58.9 1.9 | 1534 | 52.6 12.9 | 0225 | 56.1 7.5 | 100 | 100 0 | 93 25 | 3.1 | 14.0 9.1 | 1058 | 0.56 | 8.50 | 0.008 0.009 | 33 45 | - |
| Goldfields Remote | 12/19/25 | 59.1 1.4 | 1529 | 52.6 12.9 | 0206 | - | - | - | - | - | - | - | - | - | - | - | 0 |
| NW Santa Rosa (Piner Road) | 12/20/25 | 58.7 0.4 | 2359 | 54.7 1.9 | 0746 | 57.1 0.8 | 100 | 100 0 | 100 0 | 1.1 | 7.8 2.8 | 2051 | 0.40 | 7.09 | - | - | - |
| River Rd South (Denner Ranch) | 12/20/25 | 58.4 0.6 | 2358 | 54.1 1.7 | 0723 | 56.7 0.8 | 100 | 100 0 | 100 0 | 2.7 | 12.7 3.1 | 2259 | - | - | - | - | - |
| West Santa Rosa (LOV Vineyard) | 12/20/25 | 58.6 0.3 | 2359 | 54.4 1.8 | 0725 | 56.7 1.2 | 99 | 100 0 | 95 0 | 1.1 | 8.6 3.3 | 2357 | 0.06 | 8.28 | 0.001 0.001 | 0 0 | 0 |
| Guerneville Rd (Prokopakis) | 12/20/25 | 58.9 0.4 | 1350 | 54.7 1.9 | 0744 | 57.0 1.1 | 99 | 100 0 | 95 2 | - | - | - | 0.38 | 8.24 | - | - | - |
| Guerneville Rd West (Balletto) | 12/20/25 | 59.3 0.1 | 2353 | 54.6 1.7 | 0730 | 57.3 0.9 | 100 | 100 0 | 100 2 | 1.5 | 9.2 4.6 | 2357 | 0.40 | 6.97 | - | - | - |
| Sanchietti Ranch | 12/20/25 | 60.0 0.4 | 2350 | 55.4 1.6 | 0713 | 58.0 0.9 | - | 100 0 | 98 1 | 2.1 | 11.8 4.8 | 2354 | 0.42 | 8.08 | - | - | - |
| Occidental Rd (Sebastopol) | 12/20/25 | 80.6 19.9 | 1651 | 42.0 10.3 | 1623 | 56.9 1.1 | 100 | 100 0 | 100 28 | 1.0 | 11.8 7.9 | 2359 | 0.10 | 6.15 | - | - | - |
| Lower Westside Rd (Ranch 12) | 12/20/25 | 58.8 1.2 | 2353 | 55.3 3.4 | 0850 | 57.0 1.2 | 100 | 100 0 | 96 1 | 0.5 | 7.8 1.5 | 2357 | 0.39 | 9.80 | - | - | 0 |
| Guerneville (Laughlin Rd) | 12/20/25 | 59.2 0.8 | 1400 | 55.6 3.0 | 0736 | 56.3 1.4 | 97 | 98 0 | 92 4 | 0.4 | 14.5 2.0 | 2354 | 0.84 | 11.50 | - | - | - |
| Korbel (Winery) | 12/20/25 | 58.9 0.3 | 1404 | 55.8 3.3 | 0643 | 56.6 1.3 | 98 | 100 0 | 92 1 | 0.1 | 3.6 12.3 | 0943 | 0.64 | 11.29 | - | - | - |
| Forestville (Shone Farms) | 12/20/25 | 59.4 1.6 | 2329 | 54.2 3.7 | 0700 | 56.4 1.0 | 98 | 99 0 | 96 0 | 1.0 | 10.7 4.8 | 2325 | 0.43 | 10.52 | 0.012 0.003 | 41 7 | 0 |
| Forestville-NE (Ranch 30) | 12/20/25 | 58.2 1.1 | 2348 | 54.7 3.1 | 0742 | 56.4 1.1 | 100 | 100 0 | 99 0 | 1.4 | 13.3 0.5 | 2346 | 0.41 | 9.87 | 0.012 0.003 | 44 8 | - |
| Green Valley Vineyard | 12/20/25 | 58.6 1.4 | 2338 | 54.3 2.7 | 0802 | 56.1 0.9 | 98 | 99 0 | 96 3 | 0.9 | 15.1 0.2 | 2344 | 0.59 | 11.67 | 0.001 0.001 | 0 0 | - |
| Green Valley (Sanchietti) | 12/20/25 | 59.7 0.5 | 1336 | 54.8 2.2 | 0740 | - | - | - | - | - | - | - | - | - | - | - | - |
| Keefer Ranch (Green Valley) | 12/20/25 | 59.1 1.4 | 2341 | 54.6 1.9 | 0755 | 56.7 0.8 | 99 | 100 0 | 96 2 | - | - | - | 0.55 | 10.07 | - | - | - |
| Graton-South (Mill Station Rd) | 12/20/25 | 59.2 0.1 | 2325 | 52.9 0.7 | 0748 | 56.5 0.9 | 100 | 100 0 | 98 2 | 0.3 | 11.6 1.3 | 2354 | 0.49 | 9.80 | - | - | 0 |
| Occidental (Horseshoe Bend) | 12/20/25 | 57.3 0.5 | 1437 | 52.2 0.6 | 0527 | 55.6 0.2 | - | 100 0 | 100 0 | - | - | - | 0.51 | 10.47 | - | - | - |
| Sexton Valley (Jacqueline's Blk) | 12/20/25 | 59.3 0.1 | 2253 | 53.7 1.0 | 0745 | 56.9 0.9 | 99 | 100 0 | 99 2 | 0.5 | 6.5 3.3 | 2301 | 0.00 | 6.99 | - | - | - |
| Sebastopol Hills (Burnside Rd) | 12/20/25 | 57.9 0.0 | 2233 | 52.6 0.8 | 0752 | 55.9 0.5 | 100 | 100 0 | 100 0 | 1.2 | 16.2 3.6 | 2345 | 0.58 | 9.27 | - | - | - |
| Seaview/Fort Ross (Hirsch) | 12/20/25 | 54.9 0.2 | 2133 | 51.3 0.0 | 0745 | 52.1 0.2 | 97 | 97 0 | 95 2 | 2.4 | 17.0 0.7 | 2122 | 1.17 | 17.66 | 0.014 0.008 | 50 29 | - |
| Max | 80.6 | - | 55.8 | - | 58.0 | 100 | 100 | 100 | 2.7 | 17.0 | - | 1.17 | 17.66 | 0.060 | 50 | - | |
| Avg | - | - | - | - | 46.0 | 87 | - | - | 1.2 | - | - | - | - | - | - | - | |
| Min | 54.9 | - | 42.0 | - | -57.8 | 0 | 0 | 0 | 0.1 | 3.6 | - | 0.00 | 3.15 | 0.001 | 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 | 12/20/25 | 56.9 0.6 | 1530 | 54.1 2.2 | 0754 | 55.2 1.5 | 99 0 | 98 0 | 1.6 0.0 | 10.7 2.1 | 2244 | SSE | 160 | 0.00 | 5.40 | 0.012 0.006 | 47 24 | - |
| Lower Bennett Valley | 12/20/25 | 59.3 0.5 | 1506 | 55.3 3.0 | 0710 | 57.1 1.5 | 100 0 | 93 7 | 2.1 0.4 | 12.5 0.3 | 2323 | SSE | 150 | 0.31 | 8.21 | 0.013 0.003 | 50 16 | 0 0 |
| Kenwood (Wildwood) | 12/20/25 | 59.5 1.6 | 1445 | 56.0 4.1 | 0711 | 57.2 2.1 | 100 0 | 92 8 | 1.9 0.0 | 9.2 1.8 | 2040 | SW | 219 | 0.22 | 8.86 | 0.013 0.004 | 48 14 | - |
| Sonoma Valley (Bedrock) | 12/20/25 | 58.2 0.5 | 1406 | 55.1 4.2 | 0721 | 55.8 2.1 | 98 0 | 94 1 | - | - | - | - | 0.35 | 7.85 | - | - | - |
| Sonoma-West (Arnold) | 12/20/25 | 58.6 1.7 | 1402 | 56.6 4.1 | 0709 | 57.6 2.1 | 100 0 | 100 14 | 1.0 0.8 | 5.3 5.7 | 1120 | ESE | 112 | 0.18 | 6.12 | 0.012 0.003 | 44 10 | - |
| Sonoma Valley HS | 12/20/25 | 58.6 0.7 | 1400 | 56.6 4.0 | 0552 | 57.6 2.0 | 100 0 | 100 8 | 1.0 0.9 | 5.6 2.4 | 0839 | E | 95 | 0.00 | 4.70 | 0.010 0.001 | 35 6 | - |
| Sonoma East (Bundschu01) | 12/20/25 | 59.1 0.3 | 1338 | 56.8 4.1 | 0531 | 57.3 2.8 | 98 0 | 97 13 | 2.4 1.3 | 10.7 3.3 | 2305 | SSE | 156 | 0.00 | 0.13 | 0.011 0.003 | 37 3 | - |
| 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) | 12/20/25 | 59.3 0.1 | 1322 | 56.6 3.8 | 0745 | 56.9 2.6 | 97 0 | 96 12 | 0.5 1.8 | 8.4 3.4 | 2301 | SE | 135 | 0.12 | 5.21 | - | - | 0 0 |
| Ricci Vineyards (Carneros) | 12/20/25 | 58.9 1.4 | 1323 | 56.0 3.4 | 0827 | 56.6 2.4 | 97 0 | 96 15 | 2.4 1.8 | 8.7 4.4 | 2238 | SE | 128 | 0.11 | 5.89 | 0.013 0.006 | 44 16 | - |
| Carneros (Ranch 71) | 12/20/25 | 57.9 0.4 | 1305 | 55.2 3.5 | 0835 | 56.7 2.2 | 100 0 | 100 14 | 2.3 1.0 | 10.3 4.4 | 2049 | E | 98 | 0.12 | 5.40 | 0.010 0.003 | 36 12 | 0 0 |
| Carneros Upper (Ranch 81) | 12/20/25 | 57.8 0.9 | 1408 | 54.2 2.8 | 0811 | 56.6 52.7 | - | - | 3.1 4.3 | 15.0 6.2 | 0051 | SSW | 198 | - | - | - | - | - |
| Carneros Lower (Ranch 81) | 12/20/25 | 57.9 1.8 | 1453 | 54.6 2.2 | 0804 | -60.5 48.8 | 0 100 | 0 0 | 0.9 1.6 | 7.7 4.9 | 0046 | SSE | 159 | 0.13 | 5.75 | 0.031 0.018 | 22 10 | - |
| Rohnert Park-West (Stony Point) | 12/20/25 | 59.0 0.6 | 1258 | 54.3 0.8 | 0745 | 57.4 1.1 | 100 0 | 99 3 | 1.5 2.2 | 9.9 6.9 | 2111 | SE | 135 | 0.00 | 1.56 | - | - | - |
| Cartograph Wines Base | 12/20/25 | 58.8 0.0 | 2324 | 54.0 1.3 | 0735 | 56.9 0.8 | 100 0 | 100 2 | 2.6 2.2 | 14.6 7.5 | 2333 | SSE | 153 | 0.37 | 7.99 | 0.012 0.003 | 47 6 | - |
| Cartograph Wines Remote | 12/20/25 | 59.4 0.0 | 1249 | 53.9 1.0 | 0739 | - | - | - | - | - | - | - | - | - | - | - | - |
| Rice-Spivak Vineyard | 12/20/25 | 59.4 0.2 | 1253 | 54.3 1.0 | 0710 | - | - | - | - | - | - | - | - | - | - | - | - |
| Penngrove (Asellus) | 12/20/25 | 59.8 0.3 | 1428 | 55.7 2.4 | 0714 | 57.1 1.9 | 98 0 | 92 10 | 3.0 1.5 | 15.1 1.4 | 2013 | ESE | 108 | 0.00 | 0.10 | - | - | 0 0 |
| Roger's Creek (Ranch 50) | 12/20/25 | 57.3 0.2 | 2159 | 55.1 4.4 | 0554 | 56.1 1.9 | 100 0 | 100 0 | 2.3 1.0 | 11.9 0.7 | 2227 | SE | 141 | 0.12 | 7.15 | 0.011 0.002 | 42 5 | 0 0 |
| Petaluma (Ranch 10) | 12/20/25 | 59.4 0.4 | 1039 | 56.3 3.1 | 0652 | 57.8 2.5 | 100 0 | 100 15 | 0.6 0.2 | 4.6 1.5 | 2038 | SE | 136 | 0.05 | 4.94 | 0.011 0.000 | 42 4 | 0 0 |
| Max | 59.8 | - | 56.8 | - | 57.8 | 100 | 100 | 3.1 | 15.1 | - | - | 0.37 | 8.86 | 0.031 | 50 | - | |
| Avg | - | - | - | - | 50.0 | - | - | 1.8 | - | - | - | - | - | - | - | - | |
| Min | 56.9 | - | 53.9 | - | -60.5 | 0 | 0 | 0.5 | 4.6 | - | - | 0.00 | 0.10 | 0.010 | 22 | - |