Napa, California Weather:
Monday, September 14, 2026
Cloudy Weather
Day 88°
Night 54°
Precipitation 20 %
Wind 2 mph
UV Index (0 - 11+) 6
Weather Forecast History
Last Year's Weather on This Day (September 14, 2025)
Sunny Weather

Day

86°

Night

54°

Wind

7 mph

UV Index

60

Precipitation

0 %