| 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) | 12/15/25 | 67.9 4.2 | 1338 | 44.4 4.4 | 0001 | 44.3 2.8 | 65 | 93 2 | 24 14 | 1.7 | 11.5 5.0 | 1544 | WNW | 288 | 0.00 | 9.81 | - | - | 0 0 |
| Rockpile Upper (Cooley) | 12/15/25 | 64.2 1.8 | 1352 | 50.4 9.6 | 0019 | 39.9 2.1 | 56 | 100 8 | 26 9 | 5.9 | 24.1 12.3 | 1618 | NW | 321 | 0.00 | 10.06 | 0.069 0.005 | 198 62 | 0 0 |
| Cloverdale-East (Ranch 83) | 12/15/25 | 63.1 3.3 | 1403 | 36.9 4.8 | 0727 | -3.4 28.3 | - | - | - | 1.3 | 12.0 3.4 | 1131 | WSW | 258 | 0.01 | 7.76 | 0.040 0.001 | 177 19 | 0 0 |
| Cloverdale-SE (Ranch 38) | 12/15/25 | 63.2 5.6 | 1400 | 36.6 4.7 | 0322 | 43.9 4.2 | 90 | 100 0 | 60 8 | 2.4 | 13.3 0.8 | 1040 | SE | 132 | 0.00 | 8.36 | 0.034 0.003 | 151 12 | 0 0 |
| Geyserville-North (Hoffman) | 12/15/25 | 56.1 2.8 | 1524 | 38.8 4.2 | 0512 | 41.9 2.2 | 92 | 98 0 | 72 4 | 1.6 | 7.5 1.4 | 1145 | SE | 144 | 0.00 | 0.00 | 0.030 0.002 | 144 10 | 0 0 |
| Geyserville (Ranch 3) | 12/15/25 | 56.0 3.7 | 1526 | 39.2 4.4 | 0834 | 42.8 2.4 | 95 | 100 0 | 70 8 | 1.5 | 9.1 0.0 | 1147 | ESE | 112 | 0.00 | 7.69 | 0.028 0.002 | 146 4 | 0 0 |
| Geyserville-East (Ranch 40) | 12/15/25 | 56.3 3.1 | 1533 | 36.5 3.1 | 0348 | 42.9 3.1 | 95 | 100 0 | 76 5 | 2.6 | 9.4 4.8 | 1117 | S | 186 | 0.00 | 8.02 | 0.028 0.002 | 168 4 | 0 0 |
| Geyserville-South (Nervo Station) | 12/15/25 | 55.9 4.9 | 1523 | 39.0 4.8 | 0734 | - | - | - | - | 1.0 | 6.8 1.7 | 1232 | ESE | 120 | 0.01 | 6.21 | - | - | 0 0 |
| Jimtown-North (Piccolo Ranch 15) | 12/15/25 | 57.1 3.1 | 1406 | 39.3 3.2 | 0441 | 42.3 1.2 | 94 | 100 0 | 66 5 | 0.8 | 5.0 2.2 | 1529 | SW | 229 | 0.01 | 7.84 | 0.023 0.002 | 121 1 | 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) | 12/15/25 | 57.8 2.3 | 1336 | 38.2 1.6 | 0738 | 41.8 0.5 | 93 | 100 0 | 65 4 | 1.5 | 7.4 1.4 | 0527 | E | 79 | 0.00 | 8.30 | 0.026 0.002 | 129 3 | 0 0 |
| N Chalk Hill Rd (Ranch 63) | 12/15/25 | 54.8 3.1 | 1432 | 37.3 1.5 | 0741 | 41.5 1.2 | 94 | 100 0 | 73 3 | 1.4 | 7.2 3.2 | 1529 | SW | 224 | 0.00 | 8.36 | 0.023 0.001 | 114 11 | - |
| Knights Valley (Bavarian Lion) | 12/15/25 | 61.1 4.7 | 1323 | 36.0 0.8 | 0743 | 41.1 1.3 | 91 | 98 0 | 58 9 | 1.5 | 7.7 0.4 | 1426 | NNW | 327 | 0.01 | 8.59 | 0.035 0.008 | 183 34 | - |
| Upper Dry Creek Valley | 12/15/25 | 55.4 3.0 | 1318 | 37.8 2.1 | 0746 | 42.1 2.1 | 92 | 98 0 | 70 3 | 1.4 | 8.6 2.9 | 1214 | ESE | 123 | 0.00 | 8.18 | 0.032 0.001 | 169 8 | - |
| Lower Dry Creek Valley | 12/15/25 | 54.8 4.5 | 1543 | 39.4 3.2 | 0450 | 42.5 1.6 | 96 | 100 0 | 70 8 | 2.0 | 8.6 3.7 | 1156 | SE | 135 | 0.01 | 8.50 | 0.027 0.003 | 141 1 | 0 0 |
| Max | 67.9 | - | 50.4 | - | 44.3 | 96 | 100 | 76 | 5.9 | 24.1 | - | - | 0.01 | 10.06 | 0.069 | 198 | - | |
| Avg | - | - | - | - | 38.7 | 88 | - | - | 1.9 | - | - | - | - | - | - | - | - | |
| Min | 54.8 | - | 36.0 | - | -3.4 | 56 | 93 | 24 | 0.8 | 5.0 | - | - | 0.00 | 0.00 | 0.023 | 114 | - |
| 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) | 12/15/25 | 53.0 5.1 | 1557 | 39.7 3.7 | 0432 | - | - | 100 0 | 77 13 | 0.3 | 6.0 1.7 | 1257 | 0.01 | 2.36 | - | - | 0 |
| Windsor-NW (Ranch 8) | 12/15/25 | 53.6 7.6 | 1552 | 39.5 3.7 | 0748 | 40.4 2.2 | 88 | 92 0 | 82 5 | 0.9 | 6.5 0.6 | 1517 | 0.00 | 8.79 | 0.020 0.002 | 107 13 | - |
| Windsor-East (Ranch 16) | 12/15/25 | 53.9 6.5 | 1417 | 37.5 1.4 | 0333 | 41.6 0.5 | 94 | 100 0 | 71 19 | 1.4 | 7.1 0.4 | 0318 | 0.00 | 6.50 | 0.027 0.011 | 136 55 | 0 |
| Mark West-North (Ranch 14) | 12/15/25 | 53.7 6.8 | 1344 | 39.2 2.0 | 0254 | 41.8 1.0 | 93 | 99 0 | 70 21 | 0.8 | 5.9 0.4 | 1304 | 0.00 | 7.49 | 0.002 0.001 | 0 0 | 0 |
| Windsor-SE (Silk Rd) | 12/15/25 | 52.4 6.4 | 1554 | 39.1 1.7 | 2350 | 42.0 1.1 | 97 | 100 0 | 79 19 | 1.0 | 5.9 0.6 | 1519 | 0.00 | 1.89 | 0.019 0.005 | 101 28 | 0 |
| Fulton-NW (Ranch 5) | 12/15/25 | 51.9 5.9 | 1443 | 39.6 2.2 | 0525 | -0.5 33.3 | 41 | 100 0 | 3 0 | 0.9 | 5.5 1.2 | 1511 | 0.01 | 7.60 | 0.033 0.007 | 125 50 | 0 |
| Windsor-South (Laughlin Rd) | 12/15/25 | 52.4 6.5 | 1558 | 39.9 2.8 | 0557 | -24.6 32.0 | 30 | 100 88 | 0 0 | - | - | - | 0.01 | 7.13 | - | - | - |
| Fulton-SE (Barnes Rd) | 12/15/25 | 53.0 6.5 | 1345 | 39.4 1.9 | 0838 | 41.8 0.7 | 92 | 98 0 | 70 21 | 1.2 | 7.8 0.4 | 1526 | 0.00 | 7.09 | - | - | - |
| Fulton-SW (Ranch 21) | 12/15/25 | 51.0 5.7 | 1555 | 39.4 2.3 | 0741 | -33.0 35.0 | 28 | 100 100 | 0 0 | 1.2 | 6.4 0.8 | 1519 | 0.01 | 7.48 | 0.035 0.002 | 127 50 | - |
| Santa Rosa-NW (Goldfields) | 12/15/25 | 52.4 6.9 | 1550 | 39.6 2.0 | 0740 | 42.3 1.0 | 96 | 100 0 | 76 24 | 1.2 | 6.0 1.5 | 1522 | 0.01 | 7.76 | 0.020 0.008 | 99 41 | - |
| Goldfields Remote | 12/15/25 | 51.5 5.4 | 1451 | 39.6 1.9 | 0831 | - | - | - | - | - | - | - | - | - | - | - | 0 |
| NW Santa Rosa (Piner Road) | 12/15/25 | 51.0 6.1 | 1557 | 39.3 2.0 | 0813 | 42.6 1.6 | 99 | 100 0 | 91 9 | 0.8 | 5.0 1.2 | 1623 | 0.00 | 6.03 | - | - | - |
| River Rd South (Denner Ranch) | 12/15/25 | 51.5 5.8 | 1555 | 39.4 1.9 | 2338 | 42.8 1.9 | 99 | 100 0 | 86 14 | 1.6 | 6.1 2.4 | 0521 | - | - | - | - | - |
| West Santa Rosa (LOV Vineyard) | 12/15/25 | 52.0 7.0 | 1557 | 39.3 2.0 | 0811 | 42.1 1.3 | 96 | 100 0 | 80 17 | 0.6 | 5.2 0.5 | 1301 | 0.00 | 8.12 | 0.001 0.001 | 0 0 | 0 |
| Guerneville Rd (Prokopakis) | 12/15/25 | 52.6 6.6 | 1555 | 39.8 1.7 | 0838 | 42.4 1.3 | 96 | 100 0 | 77 16 | - | - | - | 0.01 | 7.17 | - | - | - |
| Guerneville Rd West (Balletto) | 12/15/25 | 51.7 6.4 | 1555 | 39.1 1.2 | 2319 | 42.1 1.0 | 97 | 100 0 | 85 14 | 1.1 | 5.5 1.6 | 1626 | 0.01 | 5.86 | - | - | - |
| Sanchietti Ranch | 12/15/25 | 53.1 7.5 | 1550 | 40.0 0.6 | 0730 | 43.3 1.1 | - | 100 0 | 86 10 | 1.5 | 6.6 1.2 | 0526 | 0.01 | 6.99 | - | - | - |
| Occidental Rd (Sebastopol) | 12/15/25 | 55.0 9.6 | 1552 | 38.8 0.9 | 0755 | 42.6 1.6 | 99 | 100 0 | 82 10 | 1.0 | 5.7 1.1 | 1625 | 0.01 | 5.81 | - | - | - |
| Lower Westside Rd (Ranch 12) | 12/15/25 | 55.1 8.2 | 1600 | 38.9 1.9 | 0418 | 42.3 1.3 | 98 | 100 0 | 73 18 | 0.9 | 5.5 1.7 | 0259 | 0.00 | 8.46 | - | - | 0 |
| Guerneville (Laughlin Rd) | 12/15/25 | 60.3 7.4 | 1405 | 40.5 0.8 | 0638 | 43.8 1.4 | 93 | 98 0 | 62 11 | 0.7 | 4.4 1.9 | 1502 | 0.00 | 9.29 | - | - | - |
| Korbel (Winery) | 12/15/25 | 54.8 4.3 | 1407 | 40.2 0.8 | 0526 | 42.9 0.9 | 93 | 100 0 | 72 8 | 1.2 | 7.5 3.5 | 1524 | 0.00 | 9.44 | - | - | - |
| Forestville (Shone Farms) | 12/15/25 | 52.0 5.2 | 1555 | 37.6 2.3 | 0450 | 42.3 2.0 | 97 | 99 0 | 85 12 | 1.1 | 6.4 1.5 | 1516 | 0.01 | 9.22 | 0.018 0.003 | 85 12 | 0 |
| Forestville-NE (Ranch 30) | 12/15/25 | 52.2 6.3 | 1546 | 38.6 2.2 | 0441 | 42.0 1.7 | 99 | 100 0 | 87 10 | 1.1 | 6.0 2.9 | 0154 | 0.00 | 8.64 | 0.017 0.003 | 89 13 | - |
| Green Valley Vineyard | 12/15/25 | 52.5 6.6 | 1604 | 39.2 1.8 | 0309 | 42.2 1.5 | 98 | 99 0 | 84 10 | 0.8 | 4.6 0.9 | 1543 | 0.01 | 9.96 | 0.002 0.001 | 3 3 | - |
| Green Valley (Sanchietti) | 12/15/25 | 52.1 5.0 | 1603 | 40.3 1.8 | 0153 | - | - | - | - | - | - | - | - | - | - | - | - |
| Keefer Ranch (Green Valley) | 12/15/25 | 51.5 4.9 | 1607 | 40.2 1.8 | 0222 | 42.6 0.9 | 99 | 100 0 | 91 3 | - | - | - | 0.01 | 8.61 | - | - | - |
| Graton-South (Mill Station Rd) | 12/15/25 | 52.1 7.2 | 1600 | 38.9 1.1 | 0820 | 42.1 1.1 | 97 | 100 0 | 83 13 | 0.0 | 3.7 0.3 | 0521 | 0.01 | 8.35 | - | - | 0 |
| Occidental (Horseshoe Bend) | 12/15/25 | 54.7 5.2 | 1358 | 36.5 0.7 | 0335 | 43.2 1.3 | - | 100 0 | 77 6 | - | - | - | 0.00 | 8.41 | - | - | - |
| Sexton Valley (Jacqueline's Blk) | 12/15/25 | 51.1 5.9 | 1530 | 39.3 1.4 | 0827 | 42.3 1.1 | 98 | 100 0 | 86 9 | 1.1 | 5.9 0.5 | 0949 | 0.00 | 6.98 | - | - | - |
| Sebastopol Hills (Burnside Rd) | 12/15/25 | 50.5 6.6 | 1614 | 38.1 0.7 | 0746 | 42.7 2.4 | 100 | 100 0 | 95 5 | 0.5 | 5.0 0.1 | 1921 | 0.00 | 7.41 | - | - | - |
| Seaview/Fort Ross (Hirsch) | 12/15/25 | 63.6 3.0 | 1337 | 47.7 4.9 | 0443 | 43.2 1.3 | 66 | 97 0 | 35 13 | 2.2 | 8.9 3.9 | 1649 | 0.00 | 13.08 | 0.052 0.007 | 190 16 | - |
| Max | 63.6 | - | 47.7 | - | 43.8 | 100 | 100 | 95 | 2.2 | 8.9 | - | 0.01 | 13.08 | 0.052 | 190 | - | |
| Avg | - | - | - | - | 35.8 | 88 | - | - | 1.0 | - | - | - | - | - | - | - | |
| Min | 50.5 | - | 36.5 | - | -33.0 | 28 | 92 | 0 | 0.0 | 3.7 | - | 0.00 | 1.89 | 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 | 12/15/25 | 56.2 4.6 | 1345 | 39.4 2.2 | 0115 | 42.5 2.0 | 96 2 | 61 14 | 1.3 0.3 | 9.2 2.9 | 0535 | NE | 38 | 0.00 | 5.40 | 0.039 0.017 | 202 70 | - |
| Lower Bennett Valley | 12/15/25 | 56.0 8.6 | 1343 | 34.0 2.7 | 0615 | 40.3 0.4 | 100 0 | 71 20 | 1.6 0.0 | 9.6 2.1 | 1234 | NW | 324 | 0.00 | 6.56 | 0.031 0.013 | 170 70 | 0 0 |
| Kenwood (Wildwood) | 12/15/25 | 49.6 6.3 | 1337 | 36.7 4.2 | 0555 | 40.6 1.8 | 100 0 | 86 14 | 1.3 0.2 | 7.5 0.9 | 1014 | WSW | 248 | 0.01 | 6.92 | 0.023 0.009 | 127 40 | - |
| Sonoma Valley (Bedrock) | 12/15/25 | 49.5 6.8 | 1604 | 36.4 1.9 | 0402 | 39.2 1.1 | 99 0 | 79 18 | - | - | - | - | 0.00 | 6.71 | - | - | - |
| Sonoma-West (Arnold) | 12/15/25 | 53.0 9.1 | 1424 | 37.3 0.4 | 2210 | 40.8 0.4 | 100 0 | 72 24 | 1.0 0.5 | 5.5 1.3 | 0931 | SSW | 193 | 0.00 | 4.40 | 0.022 0.008 | 117 41 | - |
| Sonoma Valley HS | 12/15/25 | 51.6 8.0 | 1417 | 39.2 1.3 | 2248 | 41.6 1.2 | 100 0 | 80 16 | 1.0 0.2 | 4.3 1.1 | 1550 | SE | 127 | 0.01 | 4.68 | 0.020 0.008 | 103 40 | - |
| Sonoma East (Bundschu01) | 12/15/25 | 53.0 8.8 | 1416 | 37.0 1.3 | 2317 | 40.2 0.7 | 98 0 | 69 22 | 1.5 0.4 | 6.8 0.4 | 0116 | WNW | 285 | 0.00 | 0.13 | 0.022 0.009 | 114 47 | - |
| 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) | 12/15/25 | 53.8 9.1 | 1416 | 38.9 0.6 | 2132 | 40.5 0.8 | 97 0 | 70 21 | 0.8 0.4 | 6.4 2.0 | 0104 | SE | 127 | 0.00 | 4.46 | - | - | 0 0 |
| Ricci Vineyards (Carneros) | 12/15/25 | 52.4 4.9 | 1425 | 39.0 1.6 | 2131 | 40.4 0.9 | 97 0 | 68 12 | 2.0 0.2 | 8.4 0.0 | 0928 | SE | 130 | 0.00 | 4.89 | 0.024 0.009 | 120 34 | - |
| Carneros (Ranch 71) | 12/15/25 | 50.3 6.6 | 1337 | 38.7 1.6 | 0650 | 41.4 1.8 | 100 0 | 91 9 | 2.9 0.2 | 11.7 3.8 | 2211 | E | 88 | 0.00 | 4.48 | 0.021 0.009 | 116 46 | 0 0 |
| Carneros Upper (Ranch 81) | 12/15/25 | 53.0 8.9 | 1422 | 39.0 1.5 | 0635 | 32.0 0.6 | - | - | 3.0 0.8 | 10.4 2.4 | 0534 | WNW | 300 | - | - | - | - | - |
| Carneros Lower (Ranch 81) | 12/15/25 | 52.0 6.7 | 1315 | 39.6 5.5 | 0702 | 41.2 1.4 | 100 0 | 71 19 | 1.4 0.1 | 7.1 2.9 | 1039 | S | 188 | 0.00 | 4.77 | 0.021 0.009 | 104 43 | - |
| Rohnert Park-West (Stony Point) | 12/15/25 | 51.8 8.5 | 1557 | 38.9 1.9 | 0245 | 41.7 0.9 | 100 0 | 81 17 | 1.6 0.0 | 8.6 1.0 | 0959 | E | 89 | 0.00 | 1.56 | - | - | - |
| Cartograph Wines Base | 12/15/25 | 51.3 7.8 | 1433 | 38.6 0.5 | 0242 | 42.4 1.8 | 100 0 | 87 13 | 2.1 0.1 | 9.1 0.9 | 1003 | E | 87 | 0.00 | 6.67 | 0.022 0.008 | 123 41 | - |
| Cartograph Wines Remote | 12/15/25 | 52.1 7.7 | 1437 | 39.0 0.7 | 2359 | - | - | - | - | - | - | - | - | - | - | - | - |
| Rice-Spivak Vineyard | 12/15/25 | 53.5 9.2 | 1555 | 37.4 2.2 | 2311 | - | - | - | - | - | - | - | - | - | - | - | - |
| Penngrove (Asellus) | 12/15/25 | 51.2 7.6 | 1402 | 38.5 0.9 | 0524 | 40.7 1.0 | 99 0 | 76 16 | 3.1 0.2 | 11.4 0.4 | 1008 | SE | 125 | 0.00 | 0.10 | - | - | 0 0 |
| Roger's Creek (Ranch 50) | 12/15/25 | 47.0 5.7 | 1621 | 37.5 2.7 | 0608 | 40.9 2.7 | 100 0 | 91 9 | 3.4 0.6 | 10.9 3.2 | 2203 | NE | 46 | 0.01 | 5.84 | 0.018 0.006 | 110 27 | 0 0 |
| Petaluma (Ranch 10) | 12/15/25 | 53.3 8.1 | 1412 | 39.6 2.3 | 2212 | 41.0 0.9 | 100 0 | 71 15 | 1.0 0.1 | 5.4 0.0 | 1350 | SSW | 213 | 0.00 | 4.29 | 0.022 0.009 | 104 40 | 0 0 |
| Max | 56.2 | - | 39.6 | - | 42.5 | 100 | 91 | 3.4 | 11.7 | - | - | 0.01 | 6.92 | 0.039 | 202 | - | |
| Avg | - | - | - | - | 40.4 | - | - | 1.8 | - | - | - | - | - | - | - | - | |
| Min | 47.0 | - | 34.0 | - | 32.0 | 96 | 61 | 0.8 | 4.3 | - | - | 0.00 | 0.10 | 0.018 | 103 | - |