1930 Napa Valley Vintage

Cool and normal season, compared with 1991 to 2020. Prohibition years. Few wines were made for sale. Nearest notable vintage: 1920.

Weather and season

Apr to Oct average temperature	62°F
Estimated growing degree days	2580
Frost days, Mar to Apr	1
Days 90°F and up, Aug to Oct	4
Winter rain	12.9 in
Spring rain	5.8 in
Harvest rain	2.6 in

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