1939 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: 1941.

Weather and season

Apr to Oct average temperature	64.1°F
Estimated growing degree days	3030
Frost days, Mar to Apr	4
Days 90°F and up, Aug to Oct	17
Winter rain	6.7 in
Spring rain	4 in
Harvest rain	0.5 in

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