1964 Napa Valley Vintage

Cool and dry season, compared with 1991 to 2020. Rebuilding after Repeal. A small group of estates led the recovery. Nearest notable vintage: 1966.

Weather and season

Apr to Oct average temperature	63.5°F
Estimated growing degree days	2890
Frost days, Mar to Apr	7
Days 90°F and up, Aug to Oct	18
Winter rain	10.1 in
Spring rain	2.3 in
Harvest rain	1.5 in

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