| 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) | 12/21/25 | 57.2 2.0 | 0307 | 54.8 4.6 | 1808 | 55.5 2.6 | 99 | 100 0 | 94 6 | 3.8 | 21.7 12.4 | 1002 | SW | 218 | 3.31 | 15.66 | - | - | 0 0 |
| Rockpile Upper (Cooley) | 12/21/25 | 54.9 0.9 | 0359 | 51.9 4.0 | 2356 | 53.3 2.4 | 100 | 100 0 | 100 0 | 17.5 | 51.7 24.5 | 1127 | SSW | 212 | 3.26 | 15.63 | 0.003 0.007 | 20 25 | 0 0 |
| Cloverdale-East (Ranch 83) | 12/21/25 | 60.1 1.5 | 0457 | 57.5 4.5 | 1722 | 55.8 115.3 | - | - | - | 7.0 | 24.0 12.8 | 0714 | ESE | 118 | 2.70 | 12.66 | 0.014 0.030 | 14 26 | 0 0 |
| Cloverdale-SE (Ranch 38) | 12/21/25 | 59.1 1.7 | 0453 | 56.8 4.2 | 1805 | 57.1 1.8 | 98 | 99 1 | 95 4 | 7.5 | 25.1 7.0 | 0927 | SE | 142 | 2.64 | 13.16 | 0.006 0.003 | 14 23 | 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) | 12/21/25 | 58.9 0.7 | 0357 | 57.4 3.1 | 1717 | 58.1 1.4 | 100 | 100 0 | 100 0 | 5.7 | 14.3 5.9 | 1140 | E | 95 | 2.36 | 11.75 | 0.004 0.007 | 14 26 | 0 0 |
| Geyserville-East (Ranch 40) | 12/21/25 | 58.2 0.9 | 0413 | 56.0 2.5 | 1713 | 56.8 1.1 | 100 | 100 0 | 98 1 | 14.3 | 27.3 6.2 | 1122 | S | 180 | 2.44 | 12.17 | 0.003 0.007 | 14 29 | 0 0 |
| Geyserville-South (Nervo Station) | 12/21/25 | 58.8 0.8 | 0452 | 57.0 2.6 | 1824 | - | - | - | - | 4.1 | 15.2 7.0 | 1057 | SE | 139 | 1.84 | 9.32 | - | - | 0 0 |
| Jimtown-North (Piccolo Ranch 15) | 12/21/25 | 59.8 1.0 | 1131 | 57.9 2.8 | 1736 | 58.4 1.1 | 98 | 100 0 | 93 7 | 3.5 | 19.8 14.9 | 1008 | SSW | 205 | 2.43 | 11.89 | 0.006 0.005 | 15 25 | 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) | 12/21/25 | 59.6 0.1 | 1109 | 58.0 1.8 | 1807 | 57.9 0.7 | 97 | 100 0 | 94 2 | 4.8 | 16.8 11.8 | 1230 | SW | 218 | 3.14 | 12.97 | 0.008 0.002 | 13 19 | 0 0 |
| N Chalk Hill Rd (Ranch 63) | 12/21/25 | 57.7 1.0 | 1112 | 56.2 2.3 | 1807 | 56.7 1.3 | 100 | 100 0 | 97 3 | 5.8 | 21.7 15.6 | 1015 | S | 183 | 2.91 | 12.81 | 0.004 0.006 | 16 20 | - |
| Knights Valley (Bavarian Lion) | 12/21/25 | 59.2 0.2 | 1105 | 57.1 1.5 | 1833 | 56.2 0.7 | 93 | 98 0 | 89 1 | 4.6 | 18.9 13.3 | 0900 | S | 190 | 3.18 | 13.39 | 0.014 0.000 | 27 24 | - |
| Upper Dry Creek Valley | 12/21/25 | 60.2 1.9 | 0502 | 57.7 3.7 | 1825 | 57.4 1.8 | 96 | 98 0 | 89 3 | 3.0 | 12.3 2.2 | 1131 | SSE | 157 | 2.59 | 12.57 | 0.009 0.003 | 21 21 | - |
| Lower Dry Creek Valley | 12/21/25 | 60.8 2.3 | 0445 | 57.9 2.8 | 1820 | 58.8 1.7 | 99 | 100 0 | 90 10 | 4.9 | 15.2 4.7 | 1135 | N | 355 | 2.81 | 12.73 | 0.008 0.004 | 26 21 | 0 0 |
| Max | 60.8 | - | 58.0 | - | 58.8 | 100 | 100 | 100 | 17.5 | 51.7 | - | - | 3.31 | 15.66 | 0.014 | 27 | - | |
| Avg | - | - | - | - | 56.8 | 98 | - | - | 6.7 | - | - | - | - | - | - | - | - | |
| Min | 54.9 | - | 51.9 | - | 53.3 | 93 | 98 | 89 | 3.0 | 12.3 | - | - | 1.84 | 9.32 | 0.003 | 13 | - |
| 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) | 12/21/25 | 59.8 1.0 | 1138 | 57.7 2.4 | 1645 | - | - | 100 0 | 94 3 | 5.3 | 22.2 12.3 | 1008 | 2.88 | 6.62 | - | - | 0 |
| Windsor-NW (Ranch 8) | 12/21/25 | 59.6 1.1 | 1112 | 58.0 2.9 | 1755 | 53.4 0.3 | 82 | 86 3 | 81 4 | 3.9 | 19.0 9.9 | 1324 | 2.45 | 12.56 | 0.022 0.008 | 19 24 | - |
| Windsor-East (Ranch 16) | 12/21/25 | 59.7 1.0 | 1131 | 57.8 2.9 | 1741 | 58.2 0.9 | 98 | 100 0 | 93 7 | 6.8 | 19.6 8.6 | 1338 | 1.81 | 9.37 | 0.007 0.003 | 15 21 | 0 |
| Mark West-North (Ranch 14) | 12/21/25 | 59.6 0.7 | 1200 | 57.7 3.2 | 1724 | 57.6 0.9 | 96 | 98 1 | 93 4 | 4.7 | 16.4 8.7 | 1420 | 1.90 | 10.52 | 0.005 0.004 | 0 0 | 0 |
| Windsor-SE (Silk Rd) | 12/21/25 | 59.9 1.4 | 1125 | 58.1 3.3 | 1812 | 57.9 1.2 | 97 | 99 1 | 94 1 | 6.0 | 19.0 9.9 | 1120 | 2.36 | 5.51 | 0.009 0.003 | 19 25 | 0 |
| Fulton-NW (Ranch 5) | 12/21/25 | 59.8 1.1 | 1135 | 57.8 3.3 | 1743 | 28.7 51.7 | 63 | 100 0 | 3 0 | 7.3 | 18.2 7.9 | 1239 | 1.78 | 10.50 | 0.046 0.009 | 18 29 | 0 |
| Windsor-South (Laughlin Rd) | 12/21/25 | 59.8 1.3 | 1121 | 57.7 3.3 | 1718 | 28.6 57.4 | 62 | 100 85 | 0 0 | - | - | - | 1.96 | 10.15 | - | - | - |
| Fulton-SE (Barnes Rd) | 12/21/25 | 60.4 1.4 | 1154 | 58.2 3.0 | 1720 | 57.7 0.9 | 95 | 97 1 | 91 6 | 5.3 | 19.0 6.9 | 1631 | 1.84 | 10.01 | - | - | - |
| Fulton-SW (Ranch 21) | 12/21/25 | 59.6 1.3 | 1126 | 57.7 3.4 | 1719 | -16.1 41.7 | 35 | 100 100 | 0 0 | 8.0 | 20.6 9.4 | 1311 | 1.79 | 10.30 | 0.088 0.028 | 21 26 | - |
| 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) | 12/21/25 | 60.3 1.6 | 1213 | 58.2 3.5 | 1720 | 59.1 2.0 | 100 | 100 0 | 100 0 | 6.0 | 20.0 12.1 | 1258 | 1.58 | 8.67 | - | - | - |
| River Rd South (Denner Ranch) | 12/21/25 | 59.8 1.4 | 1118 | 57.8 3.7 | 1705 | 58.6 1.9 | 100 | 100 0 | 100 0 | 11.0 | 28.7 16.0 | 1148 | - | - | - | - | - |
| West Santa Rosa (LOV Vineyard) | 12/21/25 | 60.0 1.4 | 1157 | 58.1 3.7 | 1714 | 57.6 0.8 | 95 | 100 0 | 92 4 | 6.6 | 20.0 11.4 | 1424 | 0.14 | 8.42 | 0.007 0.006 | 0 0 | 0 |
| Guerneville Rd (Prokopakis) | 12/21/25 | 60.2 1.3 | 1107 | 58.3 3.6 | 1712 | 58.3 1.3 | 97 | 100 0 | 93 1 | - | - | - | 1.59 | 9.83 | - | - | - |
| Guerneville Rd West (Balletto) | 12/21/25 | 60.6 1.2 | 1157 | 58.6 4.0 | 1734 | 58.7 1.5 | 98 | 100 0 | 94 6 | 7.5 | 21.8 12.6 | 0913 | 2.15 | 9.12 | - | - | - |
| Sanchietti Ranch | 12/21/25 | 61.6 1.6 | 1210 | 59.3 3.9 | 1715 | 59.4 1.4 | - | 100 0 | 93 5 | 8.7 | 24.9 13.2 | 1151 | 1.91 | 9.99 | - | - | - |
| Occidental Rd (Sebastopol) | 12/21/25 | 84.3 3.7 | 0545 | 42.1 0.1 | 1748 | 59.2 2.3 | 100 | 100 0 | 100 0 | 9.3 | 28.3 16.4 | 1231 | 0.10 | 6.25 | - | - | - |
| Lower Westside Rd (Ranch 12) | 12/21/25 | 60.1 1.3 | 1148 | 58.2 2.9 | 1739 | 57.7 0.7 | 96 | 100 0 | 92 4 | 3.3 | 16.6 8.8 | 0924 | 2.39 | 12.19 | - | - | 0 |
| Guerneville (Laughlin Rd) | 12/21/25 | 60.4 1.2 | 0413 | 58.5 3.0 | 1714 | 57.2 0.9 | 92 | 98 0 | 89 2 | 4.7 | 19.6 5.1 | 1453 | 4.99 | 16.49 | - | - | - |
| Korbel (Winery) | 12/21/25 | 60.4 1.5 | 0316 | 58.3 2.6 | 0001 | 57.2 0.6 | 92 | 100 0 | 88 4 | 0.0 | 18.3 14.7 | 1124 | 3.76 | 15.05 | - | - | - |
| Forestville (Shone Farms) | 12/21/25 | 61.6 2.2 | 1127 | 56.5 2.3 | 0744 | 57.7 1.3 | 96 | 99 0 | 93 3 | 6.3 | 23.9 13.2 | 1402 | 2.78 | 13.30 | 0.011 0.001 | 19 22 | 0 |
| Forestville-NE (Ranch 30) | 12/21/25 | 59.6 1.4 | 1137 | 57.6 2.9 | 1744 | 58.0 1.5 | 98 | 100 0 | 96 3 | 7.4 | 22.7 9.4 | 1228 | 2.33 | 12.20 | 0.008 0.004 | 22 22 | - |
| Green Valley Vineyard | 12/21/25 | 60.0 1.4 | 1109 | 57.7 3.4 | 0502 | 57.2 1.2 | 96 | 98 1 | 93 3 | 8.3 | 28.9 13.8 | 1237 | 3.71 | 15.38 | 0.007 0.006 | 0 0 | - |
| Green Valley (Sanchietti) | 12/21/25 | 61.0 1.3 | 1103 | 58.5 3.6 | 1731 | - | - | - | - | - | - | - | - | - | - | - | - |
| Keefer Ranch (Green Valley) | 12/21/25 | 60.6 1.5 | 1105 | 58.6 4.0 | 1725 | 58.3 1.5 | 96 | 98 2 | 93 3 | - | - | - | 3.45 | 13.52 | - | - | - |
| Graton-South (Mill Station Rd) | 12/21/25 | 60.0 0.8 | 1105 | 58.0 5.1 | 2002 | 57.4 0.9 | 96 | 97 3 | 95 3 | 5.0 | 17.4 5.8 | 1012 | 2.68 | 12.48 | - | - | 0 |
| Occidental (Horseshoe Bend) | 12/21/25 | 57.4 0.1 | 0122 | 56.3 4.1 | 1624 | 56.9 1.3 | - | 100 0 | 100 0 | - | - | - | 1.49 | 11.96 | - | - | - |
| Sexton Valley (Jacqueline's Blk) | 12/21/25 | 59.7 0.4 | 0200 | 58.3 4.6 | 1711 | 58.6 1.6 | 98 | 100 0 | 97 1 | 2.7 | 18.9 12.4 | 0659 | 0.00 | 6.99 | - | - | - |
| Sebastopol Hills (Burnside Rd) | 12/21/25 | 58.5 0.6 | 0202 | 57.0 4.4 | 1700 | 57.6 1.7 | 100 | 100 0 | 100 0 | 9.3 | 24.4 8.2 | 1640 | 3.09 | 12.36 | - | - | - |
| Seaview/Fort Ross (Hirsch) | 12/21/25 | 55.4 0.5 | 0328 | 52.9 1.6 | 2359 | 53.0 0.9 | 97 | 97 0 | 97 2 | 5.8 | 30.5 13.5 | 1121 | 5.68 | 23.34 | 0.005 0.009 | 5 44 | - |
| Max | 84.3 | - | 59.3 | - | 59.4 | 100 | 100 | 100 | 11.0 | 30.5 | - | 5.68 | 23.34 | 0.088 | 22 | - | |
| Avg | - | - | - | - | 52.7 | 91 | - | - | 6.2 | - | - | - | - | - | - | - | |
| Min | 55.4 | - | 42.1 | - | -16.1 | 35 | 86 | 0 | 0.0 | 16.4 | - | 0.00 | 5.51 | 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 | 12/21/25 | 56.7 0.1 | 0306 | 54.9 0.9 | 1722 | 55.6 0.4 | 99 0 | 99 0 | 2.8 1.2 | 15.3 4.5 | 2012 | SW | 216 | 0.00 | 5.40 | 0.004 0.008 | 12 35 | - |
| Lower Bennett Valley | 12/21/25 | 59.1 0.2 | 1237 | 57.0 1.7 | 1716 | 57.8 0.6 | 100 0 | 93 0 | 5.1 3.0 | 16.4 3.9 | 1614 | SSE | 149 | 2.48 | 10.69 | 0.005 0.008 | 12 37 | 0 0 |
| Kenwood (Wildwood) | 12/21/25 | 60.6 1.1 | 1248 | 56.6 0.6 | 1814 | 57.4 0.3 | 100 0 | 87 5 | 4.8 2.9 | 18.0 8.8 | 0630 | SW | 230 | 2.13 | 10.99 | 0.012 0.001 | 36 12 | - |
| Sonoma Valley (Bedrock) | 12/21/25 | 59.1 1.0 | 1124 | 56.1 1.0 | 1827 | 56.3 0.6 | 98 0 | 91 4 | - | - | - | - | 0.26 | 8.11 | - | - | - |
| Sonoma-West (Arnold) | 12/21/25 | 61.1 2.4 | 1205 | 57.9 1.3 | 1907 | 57.9 0.4 | 100 0 | 88 12 | 4.3 3.2 | 17.4 12.1 | 1558 | S | 182 | 0.26 | 6.38 | 0.017 0.005 | 53 9 | - |
| Sonoma Valley HS | 12/21/25 | 60.4 1.8 | 1151 | 57.6 1.0 | 2120 | 58.6 1.0 | 100 0 | 96 4 | 3.1 2.1 | 11.5 5.9 | 1909 | SSW | 196 | 0.01 | 4.71 | 0.012 0.002 | 45 10 | - |
| Sonoma East (Bundschu01) | 12/21/25 | 60.3 1.2 | 1339 | 57.4 0.5 | 2102 | 57.4 0.1 | 98 0 | 88 9 | 7.1 4.7 | 24.3 13.6 | 1842 | SSE | 166 | 0.00 | 0.13 | 0.015 0.004 | 36 1 | - |
| 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) | 12/21/25 | 60.2 0.9 | 1213 | 57.1 0.5 | 2038 | 57.1 0.2 | 97 0 | 89 7 | 6.2 5.6 | 19.9 11.4 | 1539 | SSW | 192 | 0.50 | 5.71 | - | - | 0 0 |
| Ricci Vineyards (Carneros) | 12/21/25 | 61.1 2.2 | 1224 | 57.1 1.1 | 2026 | 57.0 0.5 | 97 0 | 88 8 | 8.4 6.0 | 22.1 13.4 | 1840 | SSW | 192 | 0.67 | 6.56 | 0.021 0.008 | 68 24 | - |
| Carneros (Ranch 71) | 12/21/25 | 59.4 1.5 | 1222 | 56.0 0.9 | 2101 | 57.2 0.5 | 100 0 | 95 5 | 7.9 5.6 | 21.1 10.9 | 1639 | S | 177 | 0.62 | 6.02 | 0.010 0.000 | 45 9 | 0 0 |
| Carneros Upper (Ranch 81) | 12/21/25 | 59.3 1.5 | 1220 | 56.1 1.9 | 1940 | 42.5 14.2 | - | - | 15.2 12.1 | 30.5 15.6 | 1634 | S | 190 | - | - | - | - | - |
| Carneros Lower (Ranch 81) | 12/21/25 | 59.5 1.6 | 1225 | 56.3 1.7 | 2124 | -59.9 0.6 | 0 0 | 0 0 | 4.8 3.9 | 17.9 10.2 | 1532 | S | 185 | 0.60 | 6.35 | 0.112 0.081 | 28 5 | - |
| Rohnert Park-West (Stony Point) | 12/21/25 | 61.1 2.1 | 1214 | 58.5 4.2 | 1633 | 58.5 1.1 | 100 0 | 91 8 | 8.0 6.5 | 21.7 11.8 | 1647 | S | 173 | 0.01 | 1.57 | - | - | - |
| Cartograph Wines Base | 12/21/25 | 60.1 1.3 | 1217 | 57.9 3.9 | 1707 | 58.5 1.6 | 100 0 | 95 5 | 9.6 7.0 | 32.6 18.0 | 1221 | S | 177 | 1.13 | 9.12 | 0.009 0.003 | 30 17 | - |
| Cartograph Wines Remote | 12/21/25 | 60.2 0.7 | 1103 | 58.0 4.1 | 1706 | - | - | - | - | - | - | - | - | - | - | - | - |
| Rice-Spivak Vineyard | 12/21/25 | 60.8 1.4 | 1212 | 58.4 4.1 | 1630 | - | - | - | - | - | - | - | - | - | - | - | - |
| Penngrove (Asellus) | 12/21/25 | 60.8 1.1 | 1242 | 57.4 1.7 | 1843 | 57.4 0.3 | 98 1 | 87 5 | 6.9 4.0 | 22.3 7.2 | 1014 | SSW | 201 | 0.00 | 0.10 | - | - | 0 0 |
| Roger's Creek (Ranch 50) | 12/21/25 | 58.0 0.7 | 1118 | 55.5 0.4 | 1817 | 56.7 0.6 | 100 0 | 100 0 | 6.1 3.7 | 16.4 4.5 | 1709 | S | 170 | 0.90 | 8.05 | 0.006 0.005 | 26 17 | 0 0 |
| Petaluma (Ranch 10) | 12/21/25 | 60.8 1.5 | 1121 | 57.5 1.2 | 1745 | 58.2 0.3 | 100 0 | 92 8 | 1.2 0.6 | 12.6 8.0 | 1032 | SW | 215 | 0.74 | 5.68 | 0.008 0.003 | 24 18 | 0 0 |
| Max | 61.1 | - | 58.5 | - | 58.6 | 100 | 100 | 15.2 | 32.6 | - | - | 2.48 | 10.99 | 0.112 | 68 | - | |
| Avg | - | - | - | - | 49.7 | - | - | 6.3 | - | - | - | - | - | - | - | - | |
| Min | 56.7 | - | 54.9 | - | -59.9 | 0 | 0 | 1.2 | 11.5 | - | - | 0.00 | 0.10 | 0.004 | 12 | - |