Late August–October (harvest/crush season) or March–May (spring). Harvest season (late August–October) offers the most distinctive wine-country experience — active crush operations, harvest events, winemaker dinners, and daytime highs in the 70s–80s°F with cool evenings. Spring offers bud break, mustard bloom, wildflowers, fewer crowds, and moderate prices. Both periods avoid summer peak pricing while still offering excellent weather
| Month | High (°F) | Low (°F) | Notes |
|---|---|---|---|
| Jan | 58 | 40 | cool & changeable |
| Feb | 61 | 41 | mild & mostly dry |
| Mar | 64 | 43 | mild & changeable |
| Apr | 69 | 46 | mild & mostly dry |
| May | 75 | 50 | warm & sunny |
| Jun | 82 | 54 | warm & sunny |
| Jul | 85 | 56 | hot & sunny |
| Aug | 85 | 56 | hot & sunny |
| Sep | 84 | 56 | warm & sunny |
| Oct | 76 | 52 | warm & sunny |
| Nov | 64 | 45 | mild & mostly dry |
| Dec | 57 | 40 | cool & changeable |