1989 Napa Valley Vintage

Cool and normal season, compared with 1991 to 2020. The modern era begins as new wineries open and Cabernet leads. Nearest notable vintage: 1992.

Weather and season

Apr to Oct average temperature	64.7°F
Estimated growing degree days	3140
Frost days, Mar to Apr	2
Days 90°F and up, Aug to Oct	9
Winter rain	10.5 in
Spring rain	7.8 in
Harvest rain	3.8 in

Station: south valley. Growing degree days are estimated from monthly means.