1918 Napa Valley Vintage
Cool and dry season, compared with 1991 to 2020. Early valley history. Weather records are sparse, so no individual vintage notes survive. Nearest notable vintage: 1920.
Weather and season
| Apr to Oct average temperature | 62.9°F |
|---|---|
| Estimated growing degree days | 2760 |
| Frost days, Mar to Apr | 8 |
| Days 90°F and up, Aug to Oct | 12 |
| Winter rain | 9.3 in |
| Spring rain | 3.7 in |
| Harvest rain | 3.1 in |
Station: south valley. Growing degree days are estimated from monthly means.
Explore 1918 on the interactive timeline