| 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 | 1/31/26 | 65.7 0.3 | 1531 | 37.8 0.7 | 0729 | - | - | - | - | - | - | - | 0.00 | 34.87 | - | - | - |
| Pope Valley (Weeks Lake) | 1/31/26 | 70.1 1.2 | 1332 | 30.6 0.1 | 0440 | 38.2 0.6 | 100 0 | 33 3 | 0.7 | 5.9 3.3 | 1543 | SE | 144 | 0.00 | 17.00 | 0.051 0.008 | 220 29 | 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 | 1/31/26 | 68.7 2.6 | 1449 | 32.2 0.5 | 0555 | 41.9 0.4 | 100 0 | 47 3 | 1.9 | 9.3 4.2 | 1620 | NE | 38 | 0.01 | 14.85 | 0.062 0.007 | 246 27 | - |
| Dollarhide 1AS Remote | 1/31/26 | 69.7 2.7 | 1442 | 30.2 1.2 | 0516 | 38.6 0.2 | 96 0 | 44 1 | 0.7 | 6.6 3.1 | 1637 | N | 0 | - | - | - | - | - |
| Dollarhide 17B Remote | 1/31/26 | 69.8 1.7 | 1447 | 31.4 0.0 | 0727 | 40.6 0.0 | 100 0 | 44 1 | - | - | - | - | - | - | - | - | - |
| Dollarhide 18A Remote | 1/31/26 | 68.3 2.3 | 1403 | 29.5 1.3 | 0525 | 38.3 0.0 | 100 0 | 42 0 | - | - | - | - | - | - | - | - | - |
| Angwin | 1/31/26 | 60.2 2.0 | 1443 | 49.9 1.1 | 0618 | 32.5 3.7 | 65 5 | 33 0 | 6.1 | 14.4 1.2 | 1105 | NNW | 335 | 0.00 | 32.20 | 0.065 0.014 | 0 0 | 0 0 |
| Lower Angwin (Pioneer) | 1/31/26 | 63.0 1.1 | 1443 | 36.4 0.7 | 2339 | - | - | - | 3.2 | 11.2 0.4 | 1205 | NE | 42 | - | - | - | - | - |
| Deer Park | 1/31/26 | 70.9 0.2 | 1440 | 49.6 4.3 | 2326 | 38.7 2.7 | 81 6 | 30 1 | 2.8 | 13.6 0.2 | 1245 | NNE | 14 | 0.00 | 18.58 | 0.069 0.006 | 178 12 | - |
| Lower Chiles Valley (Brown) | 1/31/26 | 66.4 0.0 | 1449 | 35.0 1.5 | 0011 | 39.5 0.1 | 100 0 | 37 2 | 1.8 | 9.6 1.9 | 1218 | ESE | 111 | 0.00 | 14.48 | 0.064 0.005 | 221 42 | 0 0 |
| Moss Creek Vineyard/Reservior | 1/31/26 | 63.6 0.2 | 1439 | 34.4 1.0 | 0702 | 40.3 0.3 | 100 0 | 44 1 | - | - | - | - | 0.00 | 19.07 | - | - | - |
| Max | 70.9 | - | 49.9 | - | 41.9 | 100 | 47 | 6.1 | 14.4 | - | - | 0.01 | 34.87 | 0.069 | 246 | - | |
| Avg | - | - | - | - | 38.7 | - | - | 2.4 | - | - | - | - | - | - | - | - | |
| Min | 60.2 | - | 29.5 | - | 32.5 | 65 | 30 | 0.7 | 5.9 | - | - | 0.00 | 14.48 | 0.051 | 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 | 1/31/26 | 72.5 1.2 | 1344 | 34.2 1.5 | 0715 | 42.3 0.3 | 100 0 | 34 4 | - | - | - | - | 0.00 | 22.79 | - | - | - |
| Fotsch (Maple Lane) | 1/31/26 | 71.6 0.1 | 1456 | 31.9 2.0 | 0559 | 39.9 0.5 | 98 0 | 30 0 | 2.0 | 15.7 4.8 | 2131 | WSW | 253 | 0.00 | 20.71 | - | - | - |
| Diamond Mtn (Schramsberg) | 1/31/26 | 65.2 0.4 | 1325 | 48.6 1.2 | 0423 | 37.5 4.0 | 80 2 | 30 7 | - | - | - | - | 0.00 | 20.87 | - | - | - |
| Diamond Mtn (McEachran) | 1/31/26 | 67.9 0.5 | 1418 | 44.1 0.4 | 0829 | 41.3 1.6 | 85 8 | 34 0 | - | - | - | - | - | - | - | - | - |
| St. Helena-North | 1/31/26 | 69.9 1.7 | 1257 | 35.6 0.1 | 0717 | 40.8 0.6 | 100 0 | 28 2 | 1.9 | 8.6 1.3 | 1310 | SSE | 149 | 0.00 | 20.85 | 0.049 0.008 | 128 68 | - |
| St. Helena (NVV Office) | 1/31/26 | 71.0 0.4 | 1453 | 35.8 1.4 | 0552 | - | - | - | 0.9 | 6.7 1.4 | 1349 | SE | 131 | 0.00 | 18.28 | - | - | - |
| Tiara Fria (East St. Helena) | 1/31/26 | 70.8 0.0 | 1452 | 35.7 0.1 | 0620 | 41.2 0.4 | 97 0 | 31 5 | 1.4 | 8.7 0.7 | 1318 | ESE | 122 | 0.00 | 16.83 | - | - | - |
| Rutherford Hill Estate | 1/31/26 | 72.4 1.7 | 1358 | 47.4 2.7 | 0444 | 41.1 2.4 | 80 13 | 33 1 | 1.3 | 9.9 1.1 | 1553 | E | 91 | 0.00 | 17.09 | 0.058 0.004 | 204 27 | 0 0 |
| Rutherford-North (Mee Ln) | 1/31/26 | 71.2 0.7 | 1401 | 33.4 0.3 | 0604 | 40.2 0.1 | 99 1 | 33 3 | 2.0 | 9.0 1.3 | 1430 | ESE | 110 | 0.00 | 15.43 | 0.052 0.003 | 170 32 | 0 0 |
| Rutherford (STS) | 1/31/26 | 71.2 1.3 | 1435 | 36.6 0.0 | 0409 | 42.9 0.4 | 92 0 | 41 0 | 2.0 | 9.0 1.8 | 1401 | NE | 35 | 0.00 | 16.15 | 0.062 0.004 | 238 35 | - |
| Oakville-NE (Ranch 88) | 1/31/26 | 70.0 0.5 | 1318 | 33.3 0.0 | 0454 | 40.3 0.2 | 96 1 | 34 3 | 0.8 | 8.4 2.0 | 1117 | NNE | 18 | 0.00 | 16.13 | 0.058 0.003 | 224 41 | 0 0 |
| OV561-East | 1/31/26 | 70.8 1.6 | 1441 | 34.8 0.4 | 0600 | - | - | - | - | - | - | - | - | - | - | - | - |
| Oakville | 1/31/26 | 69.9 0.2 | 1319 | 34.2 0.1 | 0555 | 41.8 0.3 | 98 0 | 36 1 | 1.5 | 8.0 0.6 | 1220 | NW | 317 | 0.00 | 16.67 | 0.058 0.006 | 225 40 | - |
| OV518-West | 1/31/26 | 68.3 0.1 | 1406 | 36.2 0.4 | 0532 | - | - | - | - | - | - | - | - | - | - | - | - |
| To Kalon Remote (TKKE) | 1/31/26 | 70.4 1.7 | 1405 | 34.6 0.2 | 0418 | - | - | - | - | - | - | - | - | - | - | - | - |
| To Kalon | 1/31/26 | 70.2 0.4 | 1610 | 35.4 0.8 | 0456 | 42.1 0.7 | 100 0 | 36 1 | 2.2 | 9.1 2.4 | 1119 | NW | 306 | 0.00 | 17.83 | 0.060 0.001 | 204 39 | - |
| To Kalon Remote (TKN5) | 1/31/26 | 69.8 0.5 | 1417 | 34.0 0.9 | 0503 | - | - | - | - | - | - | - | - | - | - | - | - |
| Yountville (Ranch 67) | 1/31/26 | 68.6 1.1 | 1325 | 33.8 1.9 | 0526 | 41.4 0.1 | 98 0 | 38 2 | 1.3 | 6.9 0.3 | 0825 | S | 182 | 0.00 | 15.30 | 0.056 0.009 | 279 47 | - |
| Stags Leap Dist (Silverado Vineyards) | 1/31/26 | 68.2 1.0 | 1314 | 34.7 2.0 | 0433 | 41.4 0.4 | 99 1 | 38 5 | 0.8 | 6.5 0.7 | 1338 | SE | 144 | 0.00 | 18.56 | 0.057 0.004 | 238 23 | - |
| Borreo (Soda Canyon) | 1/31/26 | 67.4 1.2 | 1507 | 38.0 0.1 | 0530 | 40.6 1.4 | 93 5 | 34 8 | 1.6 | 12.1 5.1 | 2208 | WNW | 290 | 0.00 | 18.92 | 0.059 0.005 | 245 28 | - |
| Wappo Hill Floor | 1/31/26 | 70.1 3.7 | 1508 | 31.9 3.0 | 0515 | 42.0 0.4 | 100 0 | 40 4 | 1.0 | 7.4 0.6 | 2202 | WNW | 295 | 0.00 | 18.31 | 0.055 0.007 | 229 33 | - |
| Stags Leap Dist (Chimney Rock) | 1/31/26 | 70.6 1.0 | 1322 | 32.8 3.3 | 0547 | - | - | - | 1.2 | 7.0 0.4 | 2211 | NNE | 18 | 0.00 | 16.36 | 0.051 0.006 | 202 28 | 0 0 |
| Yountville-South (Ranch 87) | 1/31/26 | 69.0 1.5 | 1550 | 33.9 2.7 | 0453 | 42.6 0.3 | 100 0 | 45 6 | 0.8 | 6.0 0.3 | 1407 | SW | 236 | 0.00 | 18.37 | 0.052 0.007 | 211 36 | - |
| Yountville-SE (Ranch 85) | 1/31/26 | 69.4 2.3 | 1512 | 34.5 1.3 | 0547 | 42.4 0.4 | 100 0 | 41 1 | 0.9 | 6.0 0.8 | 2204 | N | 354 | 0.00 | 17.30 | - | 0 0 | 0 0 |
| Oak Knoll-East (Ranch 53) | 1/31/26 | 70.1 2.1 | 1549 | 34.3 1.8 | 0614 | 41.6 0.0 | 97 1 | 39 2 | 0.8 | 6.4 0.7 | 2348 | N | 351 | 0.00 | 16.19 | 0.051 0.008 | 214 28 | - |
| Napa-NW (Ranch 54) | 1/31/26 | 68.4 2.3 | 1540 | 35.8 1.2 | 0627 | 42.5 0.9 | 100 0 | 43 2 | 0.8 | 5.8 0.7 | 1258 | S | 183 | 0.00 | 17.35 | - | 0 0 | 0 0 |
| Napa-North (Ranch 29) | 1/31/26 | 69.5 0.9 | 1548 | 35.0 0.6 | 0636 | 42.4 0.7 | 100 0 | 41 1 | 0.5 | 4.7 3.3 | 1318 | SW | 220 | 0.00 | 15.88 | 0.036 0.006 | 129 27 | - |
| Max | 72.5 | - | 48.6 | - | 42.9 | 100 | 45 | 2.2 | 15.7 | - | - | 0.00 | 22.79 | 0.062 | 279 | - | |
| Avg | - | - | - | - | 41.4 | - | - | 1.3 | - | - | - | - | - | - | - | - | |
| Min | 65.2 | - | 31.9 | - | 37.5 | 80 | 28 | 0.5 | 4.7 | - | - | 0.00 | 15.30 | 0.036 | 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 | 1/31/26 | 65.3 2.0 | 1013 | 50.8 0.0 | 0554 | 36.5 2.9 | 62 9 | 31 3 | 1.5 | 7.2 1.7 | 0733 | W | 281 | 0.00 | 23.09 | 0.090 0.003 | 431 18 | 0 0 |
| Mount George (Napa East) | 1/31/26 | 72.0 4.0 | 1501 | 39.1 0.9 | 0624 | 45.3 1.0 | 100 0 | 46 11 | 0.7 | 5.5 7.8 | 0833 | WNW | 299 | 0.00 | 7.26 | 0.060 0.009 | 250 22 | - |
| Napa-East (Palmaz 300') | 1/31/26 | 69.4 1.5 | 1421 | 39.7 1.2 | 0629 | 42.8 0.0 | 100 0 | 41 11 | 1.2 | 12.5 2.9 | 0818 | NE | 42 | 0.00 | 14.12 | 0.054 0.010 | 217 16 | - |
| Napa-East (Palmaz 1200') | 1/31/26 | 65.8 1.6 | 1422 | 43.6 3.4 | 2323 | 38.3 2.0 | 88 12 | 31 7 | 3.5 | 13.4 0.1 | 1027 | ENE | 71 | - | - | 0.076 0.005 | 236 15 | - |
| Napa-East (Palmaz 1400') | 1/31/26 | 64.0 1.0 | 1427 | 43.8 4.6 | 2344 | 39.0 1.9 | 89 11 | 34 11 | 4.8 | 12.8 0.6 | 1209 | NNE | 19 | 0.00 | 19.62 | 0.081 0.008 | 245 14 | - |
| 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) | 1/31/26 | 69.7 1.2 | 1455 | 42.0 0.8 | 0736 | - | - | - | 1.3 | 10.8 3.6 | 2239 | NNW | 342 | 0.00 | 15.67 | 0.056 0.005 | 233 32 | 0 0 |
| Napa-West Lower (Truchard) | 1/31/26 | 71.4 0.0 | 1501 | 32.4 1.1 | 0700 | 41.3 0.2 | 100 0 | 41 1 | - | - | - | - | - | - | - | - | 0 0 |
| Napa-South (Toyon Farms) | 1/31/26 | 68.0 2.6 | 1539 | 39.2 1.8 | 0556 | 46.2 1.2 | 100 0 | 53 8 | 0.8 | 5.4 1.5 | 1223 | SSW | 209 | 0.00 | 9.91 | 0.031 0.004 | 122 16 | 0 0 |
| Toyon Remote 1 | 1/31/26 | 68.3 0.4 | 1413 | 35.2 1.8 | 0646 | - | - | - | - | - | - | - | - | - | - | - | - |
| Toyon Remote 2 | 1/31/26 | 68.2 0.3 | 1541 | 34.3 1.6 | 0639 | - | - | - | - | - | - | - | - | - | - | - | - |
| Toyon Remote 3 | 1/31/26 | 68.8 1.7 | 1428 | 34.2 1.7 | 0640 | - | - | - | - | - | - | - | - | - | - | - | - |
| Dealy Lane (Ranch 80) | 1/31/26 | 67.9 0.1 | 1431 | 37.6 0.1 | 0637 | 43.7 1.1 | 96 1 | 46 3 | 2.0 | 7.2 1.1 | 2241 | NNE | 21 | 0.00 | 14.92 | 0.056 0.008 | 242 32 | - |
| Carneros (Saintsbury) | 1/31/26 | 69.8 3.2 | 1418 | 35.6 1.2 | 0610 | 43.2 0.9 | 100 0 | 43 6 | 1.8 | 8.8 0.3 | 2102 | WSW | 258 | 0.00 | 1.77 | - | - | 0 0 |
| Suscol Lower (Ranch 35) | 1/31/26 | 68.2 0.5 | 1453 | 37.4 0.2 | 0611 | 41.9 1.1 | - | - | 2.1 | 6.4 7.6 | 2308 | E | 95 | 0.00 | 14.30 | 0.059 0.010 | 238 21 | - |
| Suscol Mtn (Ranch 93) | 1/31/26 | 66.4 1.7 | 1352 | 49.6 0.8 | 2135 | 38.6 3.2 | 77 3 | 37 0 | 4.5 | 22.1 8.8 | 1705 | ESE | 105 | 0.00 | 9.84 | - | - | - |
| Suscol Upper (Ranch 92) | 1/31/26 | 69.4 2.4 | 1405 | 49.6 3.7 | 2136 | 40.0 2.8 | 81 4 | 37 2 | 1.1 | 13.5 8.4 | 1708 | NNE | 19 | 0.00 | 13.75 | - | - | 0 0 |
| Stanly (Ranch 45) | 1/31/26 | 69.6 2.1 | 1407 | 35.7 1.7 | 0653 | 42.1 1.6 | 99 0 | 41 6 | 2.6 | 7.5 7.4 | 1515 | ESE | 119 | 0.00 | 15.43 | 0.067 0.011 | 268 33 | 0 0 |
| Carneros Upper (Ranch 81) | 1/31/26 | 68.8 1.4 | 1449 | 45.1 3.6 | 0710 | 44.2 0.8 | - | - | 3.2 | 13.2 0.6 | 2217 | WNW | 298 | - | - | - | - | - |
| Carneros (Mitsuko) | 1/31/26 | 69.0 2.9 | 1445 | 33.5 0.7 | 0612 | - | - | - | - | - | - | - | - | - | - | - | - |
| Carneros Lower (Ranch 81) | 1/31/26 | 66.9 1.4 | 1430 | 36.7 2.7 | 0554 | 17.8 16.2 | 100 0 | 0 0 | 1.2 | 9.4 0.2 | 2300 | ENE | 64 | 0.00 | 12.89 | 0.046 0.002 | 174 5 | - |
| Carneros (Milton Rd) | 1/31/26 | 67.3 2.0 | 1401 | 34.8 3.4 | 0549 | 42.5 1.6 | 96 1 | 46 6 | - | - | - | - | 0.00 | 5.74 | - | - | - |
| Max | 72.0 | - | 50.8 | - | 46.2 | 100 | 53 | 4.8 | 22.1 | - | - | 0.00 | 23.09 | 0.090 | 431 | - | |
| Avg | - | - | - | - | 40.2 | - | - | 2.1 | - | - | - | - | - | - | - | - | |
| Min | 64.0 | - | 32.4 | - | 17.8 | 62 | 0 | 0.7 | 5.4 | - | - | 0.00 | 1.77 | 0.031 | 122 | - |