New positive cases totaled 77 for the six days ending Wednesday, the county health department reported.
The latest weekend count is in line with COVID-19 case counts for the previous two weekends, and follows a fall-off in positive tests last week.
The latest tally of Saturday-to-Monday COVID-19 cases was in line with local totals in recent weekends.
The county briefly saw its virus transmission rate slow to the "moderate" level Monday, only to rise back to orange within a day.
Conditions for relaxing safety rules include a county staying at the moderate "yellow" level of coronavirus spread for at least three weeks.
The previously unreported positive tests date from Oct. 25 and Nov. 3, and are connected to a single lab, according to the county.
The three-day total was up from the 24 infections reported Oct. 23-25, a figure that had dropped from 41 cases Oct. 16-18 and 50 cases Oct. 9-11.
Eleven people were hospitalized in the county with COVID-19 as of Thursday, and 10% of local intensive-care beds were available.
New coronavirus cases in Napa County fell into the single digits Wednesday for the third time in just over a week.
Napa County is on a downward trend, but cases of COVID-19 in Calistoga rose by 12 over the week, with a number of them linked to the same household.
The drop in weekend COVID-19 cases follows Napa County's first one-week case count of less than 100 since July.
The new cases reported Tuesday were the lowest one-day increase since July, according to the county's COVID-19 informational website.
The local spread of the coronavirus continues to slow down after a mid-August peak in new cases, according to county health officials.
Twelve people are currently hospitalized in the county with coronavirus symptoms, according to health officials.
The latest residents to succumb to the virus lived in Napa, American Canyon and Calistoga, according to county officials.
The latest resident to die from COVID-19 was older than 65 and had not been vaccinated against the virus, according to the county.
Napa remains in the federal "high" tier of coronavirus spread while most other Bay Area counties have seen cases drop to the "substantial" level.
Nine Bay Area governments lay out conditions for relaxing mask rules, including lower transmission and illness rates and increased vaccination.
Napa County reported 15 people hospitalized locally with coronavirus as of Wednesday, with 21% of intensive care beds available.
An American Canyon woman's out-of-county death Sept. 4 has belatedly been identified as the 98th death with Napa County connections tied to COVID-19.
The county reported 47 new cases from Friday to Monday, continuing a trend of fewer infections from a summertime peak in August.