| 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) | 12/19/25 | 55.7 0.7 | 1753 | 49.1 5.1 | 0006 | 53.0 5.3 | 100 | 100 0 | 100 22 | 1.6 | 10.6 5.1 | 0826 | SE | 134 | 1.22 | 11.38 | - | - | 0 0 |
| Rockpile Upper (Cooley) | 12/19/25 | 54.1 0.6 | 1600 | 46.8 1.6 | 0002 | 51.4 3.8 | 100 | 100 0 | 100 36 | 5.5 | 21.7 12.3 | 0716 | S | 178 | 1.12 | 11.43 | 0.007 0.022 | 33 117 | 0 0 |
| Cloverdale-East (Ranch 83) | 12/19/25 | 57.8 0.2 | 1636 | 51.4 12.0 | 0001 | -49.6 21.9 | - | - | - | 1.8 | 17.0 8.4 | 1016 | SE | 142 | 1.08 | 9.12 | 0.039 0.009 | 35 90 | 0 0 |
| Cloverdale-SE (Ranch 38) | 12/19/25 | 57.8 0.5 | 1443 | 50.9 6.7 | 0001 | 54.9 6.4 | 100 | 100 0 | 98 16 | 5.0 | 20.4 8.6 | 1044 | SSE | 156 | 1.00 | 9.64 | 0.009 0.011 | 38 66 | 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) | 12/19/25 | 58.4 4.2 | 1624 | 52.3 11.9 | 0137 | 55.7 7.7 | 100 | 100 0 | 100 16 | 3.2 | 11.8 5.7 | 1117 | ESE | 113 | 0.73 | 8.63 | 0.008 0.010 | 33 51 | 0 0 |
| Geyserville-East (Ranch 40) | 12/19/25 | 57.1 5.6 | 1517 | 50.8 6.2 | 0038 | 54.7 5.9 | 100 | 100 0 | 99 6 | 6.3 | 20.2 10.7 | 1026 | SSE | 164 | 0.72 | 8.97 | 0.007 0.008 | 32 44 | 0 0 |
| Geyserville-South (Nervo Station) | 12/19/25 | 58.3 4.4 | 1630 | 51.8 8.1 | 0001 | - | - | - | - | 1.4 | 10.5 5.0 | 1048 | SSE | 168 | 0.56 | 6.94 | - | - | 0 0 |
| Jimtown-North (Piccolo Ranch 15) | 12/19/25 | 59.1 4.6 | 1601 | 52.2 10.1 | 0010 | 56.0 7.2 | 100 | 100 0 | 100 17 | 1.1 | 8.1 2.2 | 1252 | SE | 125 | 0.66 | 8.75 | 0.007 0.009 | 27 42 | 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) | 12/19/25 | 59.3 4.8 | 1614 | 52.4 8.4 | 0004 | 55.8 6.3 | 99 | 100 0 | 93 8 | 1.1 | 13.3 8.4 | 1113 | S | 180 | 0.67 | 9.16 | 0.008 0.007 | 27 36 | 0 0 |
| N Chalk Hill Rd (Ranch 63) | 12/19/25 | 57.4 3.7 | 1611 | 51.3 8.2 | 0057 | 54.6 6.4 | 100 | 100 0 | 100 15 | 2.0 | 11.5 5.6 | 1035 | SSE | 154 | 0.62 | 9.17 | 0.008 0.007 | 36 30 | - |
| Knights Valley (Bavarian Lion) | 12/19/25 | 58.2 3.7 | 1605 | 51.4 5.1 | 0416 | 53.8 4.8 | 96 | 98 1 | 87 5 | 1.9 | 11.1 6.4 | 1042 | SW | 215 | 0.78 | 9.64 | 0.011 0.005 | 36 36 | - |
| Upper Dry Creek Valley | 12/19/25 | 58.8 4.4 | 1557 | 52.0 12.6 | 0037 | 55.0 8.2 | 98 | 98 0 | 96 13 | 2.9 | 12.6 5.9 | 1019 | SE | 140 | 0.89 | 9.30 | 0.009 0.012 | 35 61 | - |
| Lower Dry Creek Valley | 12/19/25 | 59.3 4.9 | 1542 | 51.9 12.5 | 0023 | 56.0 8.0 | 100 | 100 0 | 100 17 | 3.3 | 12.6 7.5 | 1130 | N | 354 | 0.63 | 9.28 | 0.010 0.007 | 41 35 | 0 0 |
| Max | 59.3 | - | 52.4 | - | 56.0 | 100 | 100 | 100 | 6.3 | 21.7 | - | - | 1.22 | 11.43 | 0.039 | 41 | - | |
| Avg | - | - | - | - | 45.9 | 99 | - | - | 2.9 | - | - | - | - | - | - | - | - | |
| Min | 54.1 | - | 46.8 | - | -49.6 | 96 | 98 | 87 | 1.1 | 8.1 | - | - | 0.56 | 6.94 | 0.007 | 27 | - |
| 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) | 12/19/25 | 59.3 2.7 | 1609 | 52.3 9.5 | 0142 | - | - | 100 0 | 97 17 | 1.7 | 12.7 7.3 | 1125 | 0.60 | 3.10 | - | - | 0 |
| Windsor-NW (Ranch 8) | 12/19/25 | 59.1 2.8 | 1542 | 52.1 10.2 | 0038 | 51.5 5.8 | 85 | 88 2 | 83 1 | 2.1 | 11.5 7.4 | 1159 | 0.64 | 9.62 | 0.017 0.000 | 40 38 | - |
| Windsor-East (Ranch 16) | 12/19/25 | 59.0 2.2 | 1552 | 52.7 12.5 | 0050 | 56.1 7.2 | 99 | 100 0 | 89 10 | 3.3 | 15.6 10.4 | 1101 | 0.56 | 7.21 | 0.008 0.007 | 31 34 | 0 |
| Mark West-North (Ranch 14) | 12/19/25 | 58.8 2.2 | 1600 | 52.6 9.3 | 0136 | 55.3 7.0 | 97 | 98 0 | 89 13 | 1.6 | 8.7 5.7 | 1104 | 0.58 | 8.22 | 0.002 0.001 | 0 0 | 0 |
| Windsor-SE (Silk Rd) | 12/19/25 | 59.0 1.7 | 1634 | 52.4 11.6 | 0038 | 55.6 7.3 | 98 | 99 1 | 96 20 | 1.7 | 9.6 4.9 | 1159 | 0.68 | 2.75 | 0.009 0.011 | 33 67 | 0 |
| Fulton-NW (Ranch 5) | 12/19/25 | 58.8 2.0 | 1551 | 52.7 12.0 | 0218 | -13.5 23.8 | 15 | 100 0 | 3 0 | 2.9 | 12.3 8.2 | 1035 | 0.54 | 8.28 | 0.061 0.036 | 34 55 | 0 |
| Windsor-South (Laughlin Rd) | 12/19/25 | 58.8 0.4 | 1609 | 52.2 10.9 | 0039 | -11.8 4.6 | 24 | 100 0 | 0 0 | - | - | - | 0.52 | 7.81 | - | - | - |
| Fulton-SE (Barnes Rd) | 12/19/25 | 59.0 2.5 | 1600 | 53.0 12.0 | 0211 | 55.5 6.9 | 96 | 98 0 | 87 8 | 2.4 | 11.9 6.7 | 1002 | 0.56 | 7.80 | - | - | - |
| Fulton-SW (Ranch 21) | 12/19/25 | 58.6 2.4 | 1459 | 52.3 12.6 | 0150 | -52.7 34.8 | 5 | 100 0 | 0 0 | 3.3 | 14.0 9.1 | 1113 | 0.48 | 8.12 | 0.074 0.040 | 41 63 | - |
| Santa Rosa-NW (Goldfields) | 12/18/25 | 60.8 9.5 | 1555 | 39.7 2.0 | 0206 | 48.6 3.4 | 95 | 100 0 | 68 17 | 0.9 | 4.9 2.6 | 0859 | 0.00 | 7.94 | 0.017 0.009 | 78 22 | - |
| Goldfields Remote | 12/18/25 | 57.7 10.4 | 1555 | 39.7 1.1 | 0150 | - | - | - | - | - | - | - | - | - | - | - | 0 |
| NW Santa Rosa (Piner Road) | 12/19/25 | 59.0 2.8 | 1529 | 52.8 13.2 | 0212 | 56.3 7.1 | 100 | 100 0 | 100 12 | 2.0 | 10.6 6.6 | 1144 | 0.48 | 6.69 | - | - | - |
| River Rd South (Denner Ranch) | 12/19/25 | 59.0 1.0 | 1551 | 52.4 11.2 | 0043 | 55.9 6.9 | 100 | 100 0 | 100 25 | 4.3 | 15.8 9.4 | 1052 | - | - | - | - | - |
| West Santa Rosa (LOV Vineyard) | 12/19/25 | 59.0 1.0 | 1531 | 52.5 10.8 | 0147 | 55.5 7.2 | 98 | 100 0 | 95 20 | 1.7 | 11.8 7.1 | 1126 | 0.05 | 8.22 | 0.002 0.000 | 0 0 | 0 |
| Guerneville Rd (Prokopakis) | 12/19/25 | 59.3 1.2 | 1554 | 52.8 10.0 | 0105 | 55.9 7.2 | 98 | 100 0 | 96 22 | - | - | - | 0.53 | 7.86 | - | - | - |
| Guerneville Rd West (Balletto) | 12/19/25 | 59.5 2.8 | 1614 | 53.0 11.1 | 0127 | 56.4 7.3 | 100 | 100 0 | 98 17 | 2.6 | 13.8 8.6 | 1149 | 0.54 | 6.57 | - | - | - |
| Sanchietti Ranch | 12/19/25 | 60.4 3.0 | 1414 | 53.8 11.9 | 0159 | 57.1 7.3 | - | 100 0 | 97 13 | 3.2 | 16.5 11.1 | 1127 | 0.51 | 7.66 | - | - | - |
| Occidental Rd (Sebastopol) | 12/19/25 | 60.7 3.7 | 1613 | 52.2 11.5 | 0437 | 55.8 6.0 | 99 | 100 0 | 72 7 | 2.3 | 19.7 13.6 | 1212 | 0.12 | 6.05 | - | - | - |
| Lower Westside Rd (Ranch 12) | 12/19/25 | 60.0 3.7 | 1502 | 51.9 9.2 | 0027 | 55.9 7.2 | 100 | 100 0 | 95 17 | 0.9 | 9.3 4.2 | 1146 | 0.74 | 9.41 | - | - | 0 |
| Guerneville (Laughlin Rd) | 12/19/25 | 60.1 3.3 | 1312 | 52.6 6.7 | 0425 | 54.9 5.4 | 97 | 98 1 | 88 9 | 0.7 | 16.5 12.4 | 1126 | 1.10 | 10.66 | - | - | - |
| Korbel (Winery) | 12/19/25 | 59.3 3.3 | 1426 | 52.5 5.8 | 0124 | 55.3 5.5 | 99 | 100 0 | 93 11 | 0.9 | 15.9 10.5 | 1204 | 0.96 | 10.65 | - | - | - |
| Forestville (Shone Farms) | 12/19/25 | 61.0 4.9 | 1703 | 50.5 6.8 | 0416 | 55.3 6.6 | 98 | 99 0 | 96 14 | 1.7 | 15.6 10.6 | 1137 | 0.65 | 10.09 | 0.009 0.010 | 33 50 | 0 |
| Forestville-NE (Ranch 30) | 12/19/25 | 59.3 2.8 | 1457 | 51.6 7.2 | 0050 | 55.3 6.2 | 100 | 100 0 | 99 15 | 2.0 | 12.8 7.2 | 1134 | 0.60 | 9.46 | 0.009 0.010 | 36 54 | - |
| Green Valley Vineyard | 12/19/25 | 60.0 3.7 | 1525 | 51.6 9.6 | 0024 | 55.2 6.9 | 97 | 99 0 | 94 14 | 1.5 | 15.3 11.0 | 1156 | 0.90 | 11.08 | 0.002 0.000 | 0 0 | - |
| Green Valley (Sanchietti) | 12/19/25 | 60.2 1.0 | 1449 | 52.6 10.7 | 0349 | - | - | - | - | - | - | - | - | - | - | - | - |
| Keefer Ranch (Green Valley) | 12/19/25 | 60.4 3.3 | 1551 | 52.7 11.9 | 0020 | 55.9 6.9 | 98 | 100 0 | 95 12 | - | - | - | 0.72 | 9.52 | - | - | - |
| Graton-South (Mill Station Rd) | 12/19/25 | 59.2 1.5 | 1510 | 52.1 12.2 | 0140 | 55.6 7.4 | 99 | 100 0 | 96 19 | 1.0 | 10.3 7.3 | 1200 | 0.70 | 9.31 | - | - | 0 |
| Occidental (Horseshoe Bend) | 12/19/25 | 57.8 1.2 | 1603 | 51.7 4.5 | 0001 | 55.3 5.6 | - | 100 0 | 100 20 | - | - | - | 1.13 | 9.96 | - | - | - |
| Sexton Valley (Jacqueline's Blk) | 12/19/25 | 59.4 2.2 | 1510 | 52.7 12.1 | 0740 | 56.0 7.2 | 98 | 99 0 | 97 18 | 1.0 | 9.9 4.8 | 1243 | 0.00 | 6.99 | - | - | - |
| Sebastopol Hills (Burnside Rd) | 12/19/25 | 57.9 1.4 | 1548 | 51.8 7.8 | 0219 | 55.4 5.9 | 100 | 100 0 | 100 17 | 3.4 | 19.8 14.2 | 1341 | 0.97 | 8.69 | - | - | - |
| Seaview/Fort Ross (Hirsch) | 12/19/25 | 55.1 2.1 | 2037 | 51.4 6.1 | 0001 | 52.4 4.6 | 97 | 97 0 | 97 42 | 3.0 | 17.7 9.1 | 0950 | 2.64 | 16.49 | 0.006 0.024 | 21 128 | - |
| Max | 61.0 | - | 53.8 | - | 57.1 | 100 | 100 | 100 | 4.3 | 19.8 | - | 2.64 | 16.49 | 0.074 | 41 | - | |
| Avg | - | - | - | - | 46.3 | 88 | - | - | 2.1 | - | - | - | - | - | - | - | |
| Min | 55.1 | - | 50.5 | - | -52.7 | 5 | 88 | 0 | 0.7 | 8.7 | - | 0.00 | 2.75 | 0.002 | 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 | 12/19/25 | 56.3 3.3 | 1602 | 51.8 6.9 | 0018 | 53.8 5.5 | 98 0 | 98 12 | 1.6 0.7 | 8.7 2.9 | 0758 | SSW | 197 | 0.00 | 5.40 | 0.006 0.012 | 23 64 | - |
| Lower Bennett Valley | 12/19/25 | 58.8 2.8 | 1528 | 52.3 16.9 | 0605 | 55.6 8.0 | 100 0 | 86 4 | 2.5 1.2 | 12.8 6.8 | 1206 | SSW | 193 | 1.12 | 7.90 | 0.010 0.009 | 34 55 | 0 0 |
| Kenwood (Wildwood) | 12/19/25 | 57.9 2.9 | 1601 | 51.9 10.1 | 0100 | 55.0 5.9 | 100 0 | 100 14 | 2.0 0.8 | 11.0 4.7 | 1018 | S | 179 | 1.36 | 8.64 | 0.009 0.008 | 35 40 | - |
| Sonoma Valley (Bedrock) | 12/19/25 | 57.6 2.3 | 1525 | 50.9 9.4 | 0113 | 53.7 5.7 | 98 0 | 94 14 | - | - | - | - | 0.55 | 7.50 | - | - | - |
| Sonoma-West (Arnold) | 12/19/25 | 60.3 1.3 | 1128 | 52.5 13.7 | 0049 | 55.5 6.4 | 100 0 | 86 21 | 1.8 0.6 | 11.0 4.7 | 1219 | SSW | 192 | 1.05 | 5.94 | 0.015 0.016 | 54 84 | - |
| Sonoma Valley HS | 12/19/25 | 59.4 0.7 | 1157 | 52.6 10.1 | 0001 | 55.6 5.2 | 100 0 | 92 16 | 1.9 1.3 | 7.9 3.7 | 1109 | SE | 139 | 0.01 | 4.70 | 0.011 0.011 | 40 60 | - |
| Sonoma East (Bundschu01) | 12/19/25 | 58.8 2.8 | 1143 | 52.7 13.5 | 0004 | 54.5 5.9 | 98 0 | 84 20 | 3.7 2.7 | 14.0 8.5 | 1105 | S | 182 | 0.00 | 0.13 | 0.014 0.011 | 40 71 | - |
| 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) | 12/19/25 | 59.5 4.6 | 1201 | 52.8 11.6 | 0005 | 54.4 5.8 | 97 1 | 84 23 | 2.4 2.0 | 11.8 6.0 | 1026 | S | 169 | 0.39 | 5.09 | - | - | 0 0 |
| Ricci Vineyards (Carneros) | 12/19/25 | 60.2 0.8 | 1158 | 52.6 10.1 | 0001 | 54.2 5.4 | 97 0 | 81 16 | 4.2 2.7 | 13.1 5.0 | 1135 | S | 175 | 0.54 | 5.78 | 0.019 0.006 | 60 52 | - |
| Carneros (Ranch 71) | 12/19/25 | 58.3 1.6 | 1143 | 51.6 6.7 | 0008 | 54.5 4.7 | 100 0 | 86 17 | 3.3 1.7 | 14.7 5.2 | 1119 | S | 184 | 0.56 | 5.28 | 0.013 0.010 | 48 57 | 0 0 |
| Carneros Upper (Ranch 81) | 12/19/25 | 58.8 1.4 | 1142 | 51.5 5.4 | 0025 | 4.0 14.3 | - | - | 7.4 5.7 | 21.2 13.6 | 1132 | S | 189 | - | - | - | - | - |
| Carneros Lower (Ranch 81) | 12/19/25 | 59.6 1.3 | 1146 | 52.4 7.9 | 0043 | -11.7 14.6 | 100 0 | 0 0 | 2.5 2.0 | 12.6 3.4 | 1048 | S | 179 | 0.57 | 5.62 | 0.049 0.032 | 32 14 | - |
| Rohnert Park-West (Stony Point) | 12/19/25 | 59.6 2.1 | 1427 | 53.5 11.3 | 0009 | 56.3 7.4 | 100 0 | 97 16 | 3.7 3.0 | 16.9 9.9 | 1322 | SSW | 194 | 0.00 | 1.56 | - | - | - |
| Cartograph Wines Base | 12/19/25 | 58.8 1.6 | 1418 | 52.8 9.7 | 0413 | 56.0 6.5 | 100 0 | 98 13 | 4.7 3.5 | 22.1 15.3 | 1349 | SSW | 206 | 0.70 | 7.62 | 0.009 0.015 | 41 75 | - |
| Cartograph Wines Remote | 12/19/25 | 59.4 2.3 | 1442 | 52.9 12.2 | 0650 | - | - | - | - | - | - | - | - | - | - | - | - |
| Rice-Spivak Vineyard | 12/19/25 | 59.6 0.4 | 1420 | 53.3 14.3 | 0418 | - | - | - | - | - | - | - | - | - | - | - | - |
| Penngrove (Asellus) | 12/19/25 | 59.5 0.1 | 1543 | 53.3 15.8 | 0001 | 55.2 7.9 | 98 0 | 82 12 | 4.5 2.7 | 13.7 7.2 | 0755 | ESE | 114 | 0.00 | 0.10 | - | - | 0 0 |
| Roger's Creek (Ranch 50) | 12/19/25 | 57.1 1.5 | 1629 | 50.7 4.0 | 0323 | 54.2 4.4 | 100 0 | 100 31 | 3.3 1.6 | 11.2 4.0 | 1434 | SW | 236 | 0.83 | 7.03 | 0.009 0.013 | 38 58 | 0 0 |
| Petaluma (Ranch 10) | 12/19/25 | 59.7 3.1 | 1035 | 53.2 14.8 | 0013 | 55.3 7.3 | 100 0 | 85 22 | 0.7 0.2 | 6.1 0.0 | 1411 | W | 266 | 0.38 | 4.89 | 0.011 0.011 | 39 55 | 0 0 |
| Max | 60.3 | - | 53.5 | - | 56.3 | 100 | 100 | 7.4 | 22.1 | - | - | 1.36 | 8.64 | 0.049 | 60 | - | |
| Avg | - | - | - | - | 48.0 | - | - | 3.1 | - | - | - | - | - | - | - | - | |
| Min | 56.3 | - | 50.7 | - | -11.7 | 97 | 0 | 0.7 | 6.1 | - | - | 0.00 | 0.10 | 0.006 | 23 | - |