| 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 | 3/31/26 | 61.6 12.9 | 1233 | 45.9 2.6 | 1918 | - | - | - | - | - | - | - | 0.73 | 43.06 | - | - | 80 10 |
| Pope Valley (Weeks Lake) | 3/31/26 | 67.5 9.8 | 1242 | 48.3 7.9 | 0010 | 49.2 4.8 | 100 0 | 49 30 | 2.3 | 13.4 5.7 | 1827 | SSW | 206 | 0.32 | 21.92 | 0.049 0.033 | 132 101 | 90 10 |
| 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 | 3/31/26 | 71.5 7.6 | 1224 | 52.0 6.1 | 0006 | 51.2 2.5 | 96 1 | 46 18 | 4.6 | 20.9 3.1 | 1829 | WSW | 251 | 0.38 | 19.54 | 0.061 0.044 | 157 109 | 90 10 |
| Dollarhide 1AS Remote | 3/31/26 | 95.7 | 1541 | 36.7 | 0736 | 52.1 | 95 | 13 | 3.3 | 17.7 | 1300 | N | 1 | - | - | - | - | 90 |
| Dollarhide 17B Remote | 3/31/26 | 69.1 8.8 | 1222 | 50.6 6.7 | 0029 | 51.5 2.9 | 98 0 | 54 28 | - | - | - | - | - | - | - | - | 90 10 |
| Dollarhide 18A Remote | 3/31/26 | 68.8 9.0 | 1224 | 50.6 11.6 | 0026 | 50.7 3.7 | 98 1 | 44 13 | - | - | - | - | - | - | - | - | 90 10 |
| Angwin | 3/31/26 | 61.2 11.2 | 1207 | 45.0 9.9 | 1854 | 46.2 15.8 | 100 27 | 31 17 | 4.8 | 17.8 6.3 | 1427 | SE | 146 | 0.76 | 39.36 | 0.012 0.038 | 0 0 | 80 10 |
| Lower Angwin (Pioneer) | 3/31/26 | 63.1 11.0 | 1208 | 47.5 1.4 | 1827 | - | - | - | 3.7 | 16.2 4.5 | 0142 | S | 179 | - | - | - | - | 90 10 |
| Deer Park | 3/31/26 | 65.6 11.6 | 1218 | 50.5 6.8 | 2301 | 50.9 9.1 | 97 22 | 60 40 | 2.7 | 15.1 0.9 | 0240 | WNW | 293 | 0.50 | 24.11 | 0.037 0.057 | 95 113 | 90 10 |
| Lower Chiles Valley (Brown) | 3/31/26 | 66.3 8.9 | 1150 | 50.6 8.6 | 2148 | 50.0 4.3 | 95 2 | 57 31 | 2.4 | 20.7 11.1 | 1652 | NNW | 343 | 0.55 | 21.22 | 0.049 0.044 | 145 108 | 90 10 |
| Moss Creek Vineyard/Reservior | 3/31/26 | 68.9 9.3 | 1154 | 53.9 8.5 | 2025 | 50.6 4.5 | 93 0 | 54 26 | - | - | - | - | 0.14 | 23.51 | - | - | 50 10 |
| Max | 95.7 | - | 53.9 | - | 52.1 | 100 | 60 | 4.8 | 20.9 | - | - | 0.76 | 43.06 | 0.061 | 157 | - | |
| Avg | - | - | - | - | 50.3 | - | - | 3.4 | - | - | - | - | - | - | - | - | |
| Min | 61.2 | - | 36.7 | - | 46.2 | 93 | 13 | 2.3 | 13.4 | - | - | 0.14 | 19.54 | 0.012 | 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 | 3/31/26 | 70.6 9.0 | 1227 | 50.4 2.3 | 0000 | 53.0 4.4 | 99 15 | 58 30 | - | - | - | - | 0.40 | 28.29 | - | - | 40 10 |
| Fotsch (Maple Lane) | 3/9/26 | 75.9 3.7 | 1625 | 41.4 5.5 | 0743 | 44.5 1.8 | 97 3 | 26 3 | 3.3 | 15.6 1.3 | 1413 | WSW | 249 | 0.00 | 26.01 | - | - | 0 0 |
| Diamond Mtn (Schramsberg) | 3/31/26 | 64.3 11.7 | 1209 | 49.1 5.6 | 2126 | 51.2 9.3 | 100 20 | 60 37 | - | - | - | - | 0.38 | 26.78 | - | - | 90 10 |
| Diamond Mtn (McEachran) | 3/31/26 | 67.4 8.7 | 1159 | 50.2 6.2 | 2150 | 51.5 8.4 | 98 21 | 58 34 | - | - | - | - | - | - | - | - | 80 10 |
| St. Helena-North | 3/31/26 | 67.8 13.4 | 1248 | 51.1 2.5 | 2251 | 50.9 7.6 | 98 25 | 52 33 | 2.1 | 13.8 3.3 | 1750 | NNW | 329 | 0.44 | 27.10 | 0.044 0.047 | 112 115 | 80 10 |
| St. Helena (NVV Office) | 3/31/26 | 68.7 11.2 | 1204 | 52.3 3.0 | 2344 | - | - | - | 1.0 | 12.7 3.3 | 0231 | NNW | 341 | 0.35 | 23.86 | - | - | 80 10 |
| Tiara Fria (East St. Helena) | 3/31/26 | 67.3 11.4 | 1215 | 52.9 4.3 | 0008 | 51.8 6.1 | 94 13 | 53 27 | 2.9 | 16.5 2.0 | 0250 | NNW | 327 | 0.35 | 22.15 | - | - | 80 10 |
| Rutherford Hill Estate | 3/31/26 | 67.8 10.8 | 1216 | 51.5 5.5 | 2258 | 51.8 7.1 | 100 24 | 56 29 | 1.5 | 15.6 3.9 | 1335 | SSE | 157 | 0.33 | 21.68 | 0.043 0.042 | 133 108 | 90 10 |
| Rutherford-North (Mee Ln) | 3/31/26 | 69.3 9.5 | 1211 | 50.7 2.7 | 2314 | 51.5 4.4 | 94 9 | 55 30 | 2.4 | 16.0 0.0 | 1329 | SE | 146 | 0.27 | 20.76 | 0.049 0.045 | 137 110 | 90 10 |
| Rutherford (STS) | 3/31/26 | 70.5 9.0 | 1154 | 52.2 3.2 | 2257 | 53.1 3.8 | 91 4 | 58 30 | 2.1 | 12.6 0.7 | 1558 | WSW | 250 | 0.23 | 21.88 | 0.052 0.047 | 160 128 | 80 10 |
| Oakville-NE (Ranch 88) | 3/31/26 | 69.1 8.9 | 1204 | 52.7 6.5 | 2318 | 51.1 6.9 | 92 9 | 50 29 | 2.2 | 16.3 2.1 | 1329 | SSW | 202 | 0.18 | 21.37 | 0.058 0.043 | 167 105 | 0 0 |
| OV561-East | 3/31/26 | 68.9 7.8 | 1208 | 53.0 5.2 | 2257 | - | - | - | - | - | - | - | - | - | - | - | 70 10 |
| Oakville | 3/31/26 | 67.7 10.0 | 1204 | 53.0 6.5 | 0020 | 52.0 5.7 | 94 6 | 56 34 | 2.9 | 17.0 0.4 | 1325 | SE | 143 | 0.10 | 21.83 | 0.057 0.047 | 167 116 | 70 10 |
| OV518-West | 3/31/26 | 69.1 8.1 | 1207 | 53.2 5.6 | 0019 | - | - | - | - | - | - | - | - | - | - | - | 70 10 |
| To Kalon Remote (TKKE) | 3/31/26 | 69.1 10.7 | 1158 | 53.1 6.7 | 0020 | - | - | - | - | - | - | - | - | - | - | - | 80 10 |
| To Kalon | 3/31/26 | 67.5 10.8 | 1209 | 52.8 5.3 | 0020 | 52.7 6.1 | 97 11 | 56 30 | 2.6 | 14.1 0.1 | 1530 | SW | 235 | 0.14 | 23.76 | 0.051 0.044 | 146 94 | 90 10 |
| To Kalon Remote (TKN5) | 3/31/26 | 71.5 7.6 | 1206 | 53.3 7.0 | 0022 | - | - | - | - | - | - | - | - | - | - | - | 80 10 |
| Yountville (Ranch 67) | 3/31/26 | 65.8 9.9 | 1142 | 52.5 5.1 | 0040 | 51.9 5.6 | 95 8 | 56 29 | 2.7 | 14.0 0.2 | 1325 | S | 183 | 0.11 | 20.07 | 0.058 0.050 | 192 131 | 70 10 |
| Stags Leap Dist (Silverado Vineyards) | 3/31/26 | 65.3 9.8 | 1146 | 52.0 3.5 | 0037 | 51.7 5.5 | 93 8 | 59 32 | 2.1 | 13.6 1.7 | 1321 | SSE | 161 | 0.11 | 24.02 | 0.050 0.052 | 152 138 | 80 10 |
| Borreo (Soda Canyon) | 3/31/26 | 64.0 9.5 | 1138 | 53.0 4.6 | 2150 | 51.7 6.3 | 97 15 | 63 34 | 1.6 | 12.8 4.7 | 1451 | S | 174 | 0.14 | 23.97 | 0.044 0.050 | 147 155 | 80 10 |
| Wappo Hill Floor | 3/31/26 | 67.6 9.0 | 1136 | 51.5 6.3 | 0037 | 53.3 6.1 | 100 4 | 59 30 | 2.6 | 14.5 2.5 | 1446 | SSW | 212 | 0.08 | 23.36 | 0.047 0.052 | 138 121 | 70 10 |
| Stags Leap Dist (Chimney Rock) | 3/31/26 | 66.3 9.7 | 1137 | 53.8 7.1 | 0036 | 54.1 6.0 | 97 5 | 66 32 | 2.8 | 14.4 1.1 | 1439 | S | 182 | 0.11 | 22.62 | 0.045 0.052 | 130 125 | 70 10 |
| Yountville-South (Ranch 87) | 3/31/26 | 67.3 8.9 | 1137 | 53.3 6.4 | 0058 | 53.7 5.4 | 100 8 | 60 32 | 2.2 | 18.1 7.8 | 1440 | SW | 231 | 0.09 | 23.75 | 0.045 0.043 | 131 110 | 50 10 |
| Yountville-SE (Ranch 85) | 3/31/26 | 65.8 10.6 | 1131 | 53.8 6.7 | 0059 | 53.8 5.7 | 96 4 | 61 32 | 1.7 | 10.6 1.1 | 1910 | N | 350 | 0.10 | 22.29 | - | 0 0 | 70 10 |
| Oak Knoll-East (Ranch 53) | 3/31/26 | 66.1 10.2 | 1054 | 54.2 6.4 | 0047 | 53.1 6.6 | 93 5 | 57 29 | 2.3 | 14.2 4.9 | 1510 | SW | 229 | 0.08 | 20.54 | 0.049 0.041 | 136 113 | 50 10 |
| Napa-NW (Ranch 54) | 3/31/26 | 66.2 10.4 | 1124 | 54.1 5.7 | 0007 | 53.1 6.6 | 95 11 | 57 31 | 1.9 | 12.3 0.5 | 1446 | SW | 233 | 0.09 | 22.78 | - | 0 0 | 70 10 |
| Napa-North (Ranch 29) | 3/31/26 | 65.4 9.4 | 1135 | 54.7 7.0 | 0059 | 55.0 7.0 | 100 8 | 63 30 | 2.0 | 18.7 3.7 | 1427 | SSE | 166 | 0.10 | 20.42 | 0.034 0.031 | 84 66 | 70 10 |
| Max | 71.5 | - | 54.7 | - | 55.0 | 100 | 66 | 2.9 | 18.7 | - | - | 0.44 | 28.29 | 0.058 | 192 | - | |
| Avg | - | - | - | - | 52.5 | - | - | 2.2 | - | - | - | - | - | - | - | - | |
| Min | 64.0 | - | 49.1 | - | 50.9 | 91 | 50 | 1.0 | 10.6 | - | - | 0.08 | 20.07 | 0.034 | 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 | 3/31/26 | 60.6 13.8 | 1053 | 51.0 3.4 | 2045 | 49.8 10.3 | 100 23 | 50 36 | 2.5 | 14.0 9.1 | 1310 | SSE | 158 | 0.19 | 29.48 | 0.122 0.033 | 702 58 | 90 10 |
| Mount George (Napa East) | 3/31/26 | 67.0 7.1 | 1052 | 55.2 8.9 | 0526 | 54.3 7.5 | 97 10 | 65 30 | 1.4 | 14.9 7.7 | 1429 | W | 259 | 0.18 | 12.06 | 0.050 0.039 | 162 120 | 70 10 |
| Napa-East (Palmaz 300') | 3/31/26 | 67.2 8.2 | 1057 | 55.0 6.8 | 0650 | 53.8 6.7 | 100 15 | 61 28 | 1.8 | 16.1 6.1 | 1428 | SW | 222 | 0.18 | 18.49 | 0.045 0.040 | 135 110 | 70 10 |
| Napa-East (Palmaz 1200') | 3/30/26 | 75.9 7.6 | 1155 | 50.2 0.7 | 0653 | 43.7 3.4 | 86 19 | 19 0 | 2.1 | 9.3 5.4 | 1410 | WNW | 285 | - | - | 0.094 0.074 | 269 222 | 90 10 |
| Napa-East (Palmaz 1400') | 3/31/26 | 63.5 13.2 | 1056 | 51.6 1.9 | 0334 | 51.9 9.0 | 100 12 | 66 46 | 2.9 | 14.9 3.9 | 1515 | SSW | 203 | 0.28 | 25.08 | 0.039 0.060 | 148 138 | 80 10 |
| Wooden Valley | 3/31/26 | 64.3 10.9 | 1133 | 53.0 10.4 | 2243 | 51.3 4.5 | 95 1 | 62 29 | 3.2 | 21.9 10.8 | 1511 | WSW | 240 | 0.15 | 24.15 | 0.063 0.037 | 210 65 | 80 10 |
| Napa-West Upper (Truchard) | 3/31/26 | 66.8 9.0 | 1335 | 52.7 1.6 | 0003 | 14.0 32.7 | 100 13 | 0 32 | 3.4 | 20.9 7.5 | 1435 | SW | 221 | 0.08 | 20.24 | 0.057 0.042 | 152 117 | 70 10 |
| Napa-West Lower (Truchard) | 3/31/26 | 69.6 8.2 | 1046 | 52.9 9.4 | 0058 | 53.3 5.0 | 95 3 | 60 26 | - | - | - | - | - | - | - | - | 70 10 |
| Napa-South (Toyon Farms) | 3/31/26 | 65.2 9.3 | 1337 | 54.2 3.4 | 0035 | 55.6 4.3 | 100 12 | 71 27 | 2.3 | 16.0 2.2 | 1431 | SSW | 197 | 0.09 | 14.03 | 0.022 0.032 | 77 64 | 70 10 |
| Toyon Remote 1 | 3/31/26 | 67.9 7.0 | 1041 | 53.4 10.9 | 0038 | - | - | - | - | - | - | - | - | - | - | - | - |
| Toyon Remote 2 | 3/31/26 | 67.7 7.3 | 1041 | 54.3 8.6 | 0036 | - | - | - | - | - | - | - | - | - | - | - | - |
| Toyon Remote 3 | 3/31/26 | 67.2 8.0 | 1043 | 53.9 8.6 | 0035 | - | - | - | - | - | - | - | - | - | - | - | - |
| Dealy Lane (Ranch 80) | 3/31/26 | 66.1 9.5 | 1332 | 54.0 5.7 | 0039 | 53.3 5.1 | 94 10 | 62 27 | 2.0 | 13.4 4.3 | 1425 | SW | 215 | 0.06 | 19.41 | 0.048 0.049 | 155 136 | 70 10 |
| Carneros (Saintsbury) | 3/31/26 | 65.0 7.8 | 1231 | 51.3 2.5 | 0048 | 53.4 4.4 | 100 14 | 66 27 | 2.6 | 17.0 2.5 | 1408 | SW | 214 | 0.08 | 5.70 | - | - | 0 0 |
| Suscol Lower (Ranch 35) | 3/31/26 | 65.7 8.6 | 1329 | 54.4 5.0 | 0025 | 54.1 7.8 | - | - | 3.7 | 20.2 3.3 | 1428 | SSW | 204 | 0.14 | 18.45 | 0.047 0.059 | 133 133 | 70 10 |
| Suscol Mtn (Ranch 93) | 3/31/26 | 63.3 8.7 | 1327 | 53.5 1.9 | 0321 | 52.4 9.2 | 99 12 | 67 40 | 5.0 | 25.1 13.2 | 1406 | W | 264 | 0.18 | 13.98 | - | - | 70 10 |
| Suscol Upper (Ranch 92) | 3/31/26 | 63.5 9.4 | 1330 | 53.9 2.2 | 0321 | 38.5 5.8 | 100 14 | 3 27 | 2.6 | 22.5 10.0 | 1630 | SW | 217 | 0.15 | 18.31 | - | - | 80 10 |
| Stanly (Ranch 45) | 3/31/26 | 68.7 8.6 | 1236 | 52.1 6.0 | 0059 | 53.0 4.4 | 95 4 | 59 32 | 4.0 | 19.4 2.0 | 1426 | SW | 227 | 0.17 | 19.82 | 0.051 0.061 | 143 146 | 70 10 |
| Carneros Upper (Ranch 81) | 3/31/26 | 64.9 10.5 | 1220 | 54.6 1.4 | 0713 | 53.0 6.7 | - | - | 4.2 | 27.2 14.2 | 1408 | SW | 218 | - | - | - | - | 70 10 |
| Carneros (Mitsuko) | 3/31/26 | 65.7 9.4 | 1335 | 53.0 10.3 | 0038 | - | - | - | - | - | - | - | - | - | - | - | 0 0 |
| Carneros Lower (Ranch 81) | 3/31/26 | 66.0 10.1 | 1329 | 54.1 6.5 | 0043 | 54.1 4.3 | 95 7 | 66 27 | 1.2 | 14.3 3.8 | 1424 | S | 177 | 0.00 | 16.94 | 0.038 0.041 | 118 116 | 0 0 |
| Carneros (Milton Rd) | 3/31/26 | 65.6 9.0 | 1322 | 54.6 10.3 | 0658 | 54.0 5.4 | 93 2 | 64 27 | - | - | - | - | 0.00 | 17.00 | - | - | 30 10 |
| Max | 69.6 | - | 55.2 | - | 55.6 | 100 | 71 | 5.0 | 27.2 | - | - | 0.28 | 29.48 | 0.122 | 702 | - | |
| Avg | - | - | - | - | 50.0 | - | - | 2.8 | - | - | - | - | - | - | - | - | |
| Min | 60.6 | - | 51.0 | - | 14.0 | 93 | 0 | 1.2 | 13.4 | - | - | 0.00 | 5.70 | 0.022 | 77 | - |