| 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Montesol | 12/20/25 | 55.4 0.7 | 2319 | 52.0 2.2 | 0645 | - | - | - | - | - | - | - | 0.91 | 14.50 | - | - | - |
| Pope Valley (Weeks Lake) | 12/20/25 | 59.2 2.4 | 1501 | 52.7 3.4 | 0002 | 55.3 2.0 | 100 0 | 86 0 | 2.0 | 10.3 2.2 | 2123 | ESE | 108 | 0.16 | 6.26 | 0.016 0.005 | 51 14 | 0 0 |
| Whiskey River Winery | 12/13/25 | 52.8 3.6 | 1548 | 37.3 0.3 | 0759 | 36.3 2.0 | 88 11 | 68 4 | 0.0 | 0.0 2.4 | 0001 | SE | 128 | 0.00 | 7.07 | - | - | - |
| Dollarhide Base | 12/20/25 | 60.6 2.3 | 1426 | 56.0 2.3 | 0654 | 57.1 2.2 | 100 1 | 89 0 | 3.3 | 20.7 1.9 | 2347 | SSE | 162 | 0.19 | 5.52 | 0.014 0.002 | 47 6 | - |
| Dollarhide 1AS Remote | 12/20/25 | 60.5 2.3 | 1508 | 53.8 2.1 | 0112 | 55.6 1.6 | 95 0 | 88 0 | 2.4 | 21.5 0.1 | 2310 | S | 184 | - | - | - | - | - |
| Dollarhide 17B Remote | 12/20/25 | 60.2 2.1 | 1334 | 54.6 2.3 | 0048 | - | 100 0 | 92 2 | - | - | - | - | - | - | - | - | - |
| Dollarhide 18A Remote | 12/20/25 | 60.6 2.5 | 1429 | 54.0 3.6 | 0704 | 56.3 2.3 | 100 2 | 87 0 | - | - | - | - | - | - | - | - | - |
| Angwin | 12/20/25 | 53.3 1.1 | 2202 | 51.1 3.6 | 0726 | 52.1 2.1 | 100 0 | 100 0 | 5.2 | 21.4 0.1 | 2308 | SSE | 164 | 0.54 | 13.54 | 0.000 0.000 | 0 0 | 0 0 |
| Lower Angwin (Pioneer) | 12/20/25 | 54.9 1.6 | 2130 | 52.7 4.3 | 0752 | - | - | - | 3.4 | 14.8 3.7 | 2358 | SSW | 193 | - | - | - | - | - |
| Deer Park | 12/20/25 | 57.5 1.5 | 2354 | 55.2 4.7 | 0756 | 56.3 2.7 | 100 0 | 100 3 | 3.9 | 16.1 1.2 | 2143 | ESE | 109 | 0.33 | 7.68 | 0.006 0.000 | 24 1 | - |
| Lower Chiles Valley (Brown) | 12/20/25 | 60.1 2.6 | 1422 | 53.8 4.3 | 0645 | 55.4 2.7 | 100 0 | 85 4 | 1.7 | 13.7 0.1 | 2356 | WSW | 246 | 0.00 | 1.51 | 0.013 0.004 | 36 10 | 0 0 |
| Moss Creek Vineyard/Reservior | 12/20/25 | 60.2 1.8 | 1424 | 54.1 2.3 | 0725 | 55.8 2.5 | 100 0 | 86 4 | - | - | - | - | 0.23 | 6.79 | - | - | - |
| Max | 60.6 | - | 56.0 | - | 57.1 | 100 | 100 | 5.2 | 21.5 | - | - | 0.91 | 14.50 | 0.016 | 51 | - | |
| Avg | - | - | - | - | 55.5 | - | - | 3.1 | - | - | - | - | - | - | - | - | |
| Min | 53.3 | - | 51.1 | - | 52.1 | 95 | 85 | 1.7 | 10.3 | - | - | 0.00 | 1.51 | 0.000 | 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Calistoga-North | 12/20/25 | 59.5 1.5 | 1416 | 56.2 4.7 | 0754 | 57.4 2.7 | 100 0 | 99 2 | - | - | - | - | 0.32 | 9.13 | - | - | - |
| Fotsch (Maple Lane) | 12/20/25 | 59.4 2.2 | 1501 | 56.4 4.8 | 0735 | 56.6 2.6 | 98 0 | 93 1 | 1.6 | 8.5 3.1 | 2220 | ESE | 118 | 0.39 | 7.97 | - | - | - |
| Diamond Mtn (Schramsberg) | 12/20/25 | 56.7 0.5 | 1545 | 53.4 4.0 | 0719 | 55.3 2.5 | 100 0 | 100 0 | - | - | - | - | 0.46 | 8.29 | - | - | - |
| Diamond Mtn (McEachran) | 12/20/25 | 58.0 1.4 | 1446 | 55.0 4.4 | 0724 | 56.4 2.6 | 100 0 | 99 0 | - | - | - | - | - | - | - | - | - |
| St. Helena-North | 12/20/25 | 59.3 2.1 | 1426 | 56.2 5.0 | 0746 | 56.0 2.8 | 95 0 | 94 0 | 1.9 | 10.3 2.6 | 2223 | SE | 138 | 0.37 | 7.43 | 0.011 0.000 | 29 1 | - |
| St. Helena (NVV Office) | 12/20/25 | 59.2 1.5 | 1604 | 56.7 5.0 | 0722 | - | - | - | 0.7 | 6.5 4.8 | 2123 | SE | 124 | 0.33 | 7.23 | - | - | - |
| Tiara Fria (East St. Helena) | 12/20/25 | 59.7 2.0 | 1528 | 56.9 5.4 | 0742 | 57.3 2.7 | 98 0 | 93 0 | 1.8 | 11.3 2.6 | 2304 | ESE | 119 | 0.23 | 6.80 | - | - | - |
| Rutherford Hill Estate | 12/20/25 | 58.6 1.5 | 1455 | 56.0 5.1 | 0729 | 57.3 2.6 | 100 0 | 100 0 | 2.1 | 16.2 3.1 | 2256 | SSW | 212 | 0.01 | 4.05 | 0.008 0.002 | 30 7 | 0 0 |
| Rutherford-North (Mee Ln) | 12/20/25 | 49.1 1.8 | 1606 | 42.6 1.2 | 0927 | 44.7 1.2 | 98 0 | 94 5 | 3.2 | 15.1 4.2 | 2137 | SE | 129 | 0.13 | 6.08 | 0.008 0.002 | 32 4 | 0 0 |
| Rutherford (STS) | 12/19/25 | 58.0 1.5 | 1314 | 50.6 6.1 | 0008 | 49.5 3.1 | 84 6 | 79 2 | 3.6 | 16.7 9.8 | 1453 | ESE | 111 | 0.70 | 6.72 | 0.023 0.005 | 33 38 | - |
| Oakville-NE (Ranch 88) | 12/20/25 | 60.5 2.8 | 1410 | 56.4 5.7 | 0734 | 56.7 2.6 | 97 0 | 88 1 | 3.6 | 13.0 3.3 | 2245 | SSE | 164 | 0.11 | 6.52 | 0.016 0.002 | 52 13 | 0 0 |
| OV561-East | 12/20/25 | 61.8 3.4 | 1415 | 57.1 5.6 | 0733 | - | - | - | - | - | - | - | - | - | - | - | - |
| Oakville | 12/20/25 | 60.3 2.4 | 1412 | 56.6 4.9 | 0723 | 57.1 2.6 | 98 0 | 89 0 | 4.0 | 14.8 1.5 | 2225 | SE | 130 | 0.13 | 6.33 | 0.015 0.001 | 52 8 | - |
| OV518-West | 12/20/25 | 60.6 2.2 | 1409 | 56.9 4.7 | 0735 | - | - | - | - | - | - | - | - | - | - | - | - |
| To Kalon Remote (TKKE) | 12/20/25 | 60.9 2.4 | 1411 | 56.4 4.9 | 0339 | - | - | - | - | - | - | - | - | - | - | - | - |
| To Kalon | 12/20/25 | 60.2 2.3 | 1412 | 56.0 4.5 | 0308 | 57.6 2.7 | 100 0 | 94 1 | 3.4 | 15.6 2.0 | 2324 | SSE | 148 | 0.12 | 6.92 | 0.011 0.001 | 39 7 | - |
| To Kalon Remote (TKN5) | 12/20/25 | 61.0 2.2 | 1411 | 56.9 4.8 | 0307 | - | - | - | - | - | - | - | - | - | - | - | - |
| Yountville (Ranch 67) | 12/20/25 | 59.8 2.3 | 1414 | 56.0 4.0 | 0701 | 56.4 2.7 | 97 0 | 92 8 | 4.1 | 16.1 0.9 | 2336 | SE | 126 | 0.06 | 5.34 | 0.018 0.001 | 83 12 | - |
| Stags Leap Dist (Silverado Vineyards) | 12/20/25 | 59.4 1.9 | 1408 | 56.1 4.1 | 0703 | 56.0 2.7 | 97 1 | 91 7 | 3.7 | 12.8 6.4 | 2332 | ESE | 113 | 0.22 | 6.85 | 0.015 0.001 | 43 2 | - |
| Borreo (Soda Canyon) | 12/20/25 | 57.6 1.4 | 1302 | 55.4 4.7 | 0732 | 56.3 2.9 | 99 0 | 99 9 | 1.2 | 6.7 5.5 | 2248 | S | 169 | 0.40 | 8.12 | 0.011 0.003 | 39 13 | - |
| Wappo Hill Floor | 12/20/25 | 56.6 1.8 | 1414 | 53.9 2.4 | 0755 | 55.1 1.0 | 100 0 | 100 15 | 2.8 | 8.3 5.9 | 2124 | SE | 146 | 0.24 | 6.67 | 0.010 0.001 | 37 5 | - |
| Stags Leap Dist (Chimney Rock) | 12/20/25 | 59.4 1.0 | 1352 | 56.8 4.2 | 0754 | - | - | - | 2.4 | 10.3 4.8 | 2110 | SE | 138 | 0.15 | 6.93 | 0.068 0.012 | 33 6 | 0 0 |
| Yountville-South (Ranch 87) | 12/20/25 | 59.4 0.3 | 1432 | 56.7 4.5 | 0738 | 57.9 2.4 | 100 0 | 100 12 | 2.6 | 8.3 4.6 | 2125 | SSW | 193 | 0.21 | 6.69 | 0.010 0.002 | 39 4 | - |
| Yountville-SE (Ranch 85) | 12/20/25 | 59.4 0.7 | 1422 | 56.6 3.9 | 0756 | 57.9 2.6 | 100 0 | 100 14 | 2.0 | 7.0 4.2 | 2113 | S | 177 | 0.26 | 6.71 | - | 0 0 | 0 0 |
| Oak Knoll-East (Ranch 53) | 12/20/25 | 59.2 0.1 | 1441 | 56.4 4.0 | 2143 | 57.0 2.6 | 98 1 | 97 16 | 1.5 | 8.9 2.1 | 0005 | SSW | 208 | 0.30 | 7.39 | 0.010 0.004 | 32 9 | - |
| Napa-NW (Ranch 54) | 12/20/25 | 59.1 1.5 | 1345 | 56.0 3.8 | 0749 | 57.7 2.2 | 100 0 | 100 19 | 1.6 | 8.3 3.7 | 2356 | SSE | 157 | 0.32 | 7.78 | - | 0 0 | 0 0 |
| Napa-North (Ranch 29) | 12/20/25 | 59.6 1.4 | 1453 | 56.2 3.9 | 0821 | 57.9 2.4 | 100 0 | 100 22 | 0.9 | 8.8 4.4 | 0016 | S | 183 | 0.22 | 7.26 | 0.007 0.003 | 25 5 | - |
| Max | 61.8 | - | 57.1 | - | 57.9 | 100 | 100 | 4.1 | 16.2 | - | - | 0.46 | 9.13 | 0.068 | 83 | - | |
| Avg | - | - | - | - | 56.2 | - | - | 2.4 | - | - | - | - | - | - | - | - | |
| Min | 49.1 | - | 42.6 | - | 44.7 | 95 | 88 | 0.7 | 6.5 | - | - | 0.01 | 4.05 | 0.007 | 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mt. Veeder | 12/20/25 | 56.5 2.3 | 1406 | 52.1 2.9 | 0525 | 54.4 2.5 | 100 0 | 100 0 | 3.7 | 15.6 1.5 | 2338 | S | 183 | 0.27 | 9.90 | 0.012 0.008 | 48 31 | 0 0 |
| Mount George (Napa East) | 12/20/25 | 64.3 1.0 | 0349 | 59.5 4.0 | 0558 | 61.2 2.7 | 100 0 | 97 18 | 0.6 | 8.1 3.3 | 2308 | S | 171 | 0.00 | 2.99 | 0.012 0.004 | 41 8 | - |
| Napa-East (Palmaz 300') | 12/20/25 | 60.6 0.5 | 2146 | 57.0 4.5 | 0738 | 58.2 3.0 | 100 0 | 92 16 | 0.6 | 10.7 2.4 | 2138 | SE | 133 | 0.22 | 6.93 | 0.010 0.003 | 32 7 | - |
| Napa-East (Palmaz 1200') | 12/20/25 | 57.4 1.8 | 2303 | 54.6 4.3 | 2115 | 37.4 2.0 | 50 0 | 50 0 | 1.6 | 13.3 0.9 | 2347 | W | 280 | - | - | 0.029 0.002 | 31 5 | - |
| Napa-East (Palmaz 1400') | 12/20/25 | 56.8 1.9 | 2304 | 53.8 4.1 | 2120 | 55.2 2.4 | 100 0 | 100 0 | 2.5 | 15.4 2.0 | 2300 | S | 184 | 0.39 | 9.66 | 0.012 0.005 | 52 13 | - |
| Wooden Valley | 4/30/25 | 78.8 0.4 | 1303 | 51.0 7.3 | 0600 | 49.9 1.6 | 90 5 | 34 2 | 4.0 | 16.6 0.3 | 0031 | SW | 220 | 0.00 | 30.39 | 0.212 0.008 | 668 2 | 0 0 |
| Napa-West Upper (Truchard) | 12/20/25 | 55.5 3.7 | 0001 | 51.7 0.6 | 0754 | - | - | - | 2.4 | 11.0 7.0 | 0033 | S | 176 | 0.20 | 7.27 | 0.059 0.029 | 38 19 | 0 0 |
| Napa-West Lower (Truchard) | 12/20/25 | 57.3 2.5 | 1337 | 53.7 1.7 | 0800 | 55.7 1.5 | 100 0 | 100 17 | - | - | - | - | - | - | - | - | 0 0 |
| Napa-South (Toyon Farms) | 12/20/25 | 59.0 1.1 | 1403 | 54.4 1.7 | 0752 | 57.4 1.8 | 100 0 | 100 14 | 0.9 | 11.0 4.7 | 2327 | S | 169 | 0.69 | 3.05 | 0.004 0.002 | 22 10 | 0 0 |
| Toyon Remote 1 | 12/20/25 | 59.6 0.6 | 1433 | 54.5 2.2 | 0754 | - | - | - | - | - | - | - | - | - | - | - | - |
| Toyon Remote 2 | 12/20/25 | 59.8 0.3 | 1433 | 54.7 2.1 | 0745 | - | - | - | - | - | - | - | - | - | - | - | - |
| Toyon Remote 3 | 12/20/25 | 59.5 0.8 | 1431 | 54.4 2.2 | 0755 | - | - | - | - | - | - | - | - | - | - | - | - |
| Dealy Lane (Ranch 80) | 12/20/25 | 58.8 1.5 | 1500 | 54.3 2.1 | 0802 | 56.2 2.1 | 97 0 | 97 17 | 1.2 | 7.9 3.2 | 0008 | S | 187 | 0.18 | 6.92 | 0.010 0.005 | 38 20 | - |
| Carneros (Saintsbury) | 12/20/25 | 53.1 5.4 | 1456 | 48.5 0.9 | 0743 | 51.3 0.3 | 100 0 | 100 18 | 1.9 | 10.4 7.5 | 0039 | SSE | 161 | 0.00 | 1.64 | - | - | 0 0 |
| Suscol Lower (Ranch 35) | 12/20/25 | 59.1 2.0 | 1329 | 55.0 2.4 | 0742 | 18.0 34.6 | - | - | 3.2 | 13.0 2.8 | 2137 | SSE | 151 | 0.21 | 6.61 | 0.035 0.014 | 45 12 | - |
| Suscol Mtn (Ranch 93) | 12/20/25 | 56.8 0.4 | 2206 | 54.4 3.3 | 0757 | 55.5 1.9 | 100 0 | 100 13 | 3.9 | 19.6 6.1 | 2121 | SE | 126 | 0.27 | 7.29 | - | - | - |
| Suscol Upper (Ranch 92) | 12/20/25 | 57.8 0.6 | 2322 | 55.4 4.0 | 0748 | 56.7 3.9 | 100 0 | 100 97 | 2.4 | 15.2 2.5 | 2203 | ESE | 111 | 0.29 | 6.90 | - | - | 0 0 |
| Stanly (Ranch 45) | 12/20/25 | 52.8 7.0 | 0044 | 48.6 1.1 | 0724 | 50.6 0.6 | 100 0 | 99 22 | 3.1 | 12.8 4.6 | 2031 | ESE | 120 | 0.18 | 7.60 | 0.012 0.008 | 49 15 | 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 | 15.0 6.2 | 0051 | SSW | 198 | - | - | - | - | - |
| Carneros (Mitsuko) | 12/20/25 | 59.2 0.7 | 1449 | 54.4 2.1 | 0754 | - | - | - | - | - | - | - | - | - | - | - | - |
| 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 | 7.7 4.9 | 0046 | SSE | 159 | 0.13 | 5.75 | 0.031 0.018 | 22 10 | - |
| Carneros (Milton Rd) | 12/20/25 | 59.4 1.2 | 1410 | 54.4 1.2 | 0736 | 56.0 1.8 | 96 0 | 93 15 | - | - | - | - | 0.04 | 5.01 | - | - | - |
| Max | 64.3 | - | 59.5 | - | 61.2 | 100 | 100 | 3.9 | 19.6 | - | - | 0.69 | 9.90 | 0.059 | 52 | - | |
| Avg | - | - | - | - | 45.0 | - | - | 2.1 | - | - | - | - | - | - | - | - | |
| Min | 52.8 | - | 48.5 | - | -60.5 | 0 | 0 | 0.6 | 7.7 | - | - | 0.00 | 1.64 | 0.004 | 22 | - |