Napa, United States — 14-Day Weather Forecast

The 7-day forecast for Napa is generally reliable for temperature trends and major weather patterns. Days 1–3 are most accurate, while days 8–14 should be used for general planning only.

Forecast figures are fetched when you load or refresh this page (or when you return via navigation). The page does not poll for new data in the background while you stay on the same tab.

The rain percentage shows the probability of precipitation occurring at any point during that day. A 30% chance means there's roughly a 1-in-3 chance of rain.

Napa averages about 1 mm of rainfall over 0 rainy days in June. Check the precipitation chart above for the latest day-by-day outlook.

Snow is rare or absent in Napa. Winter temperatures typically stay above freezing, so precipitation falls as rain rather than snow.

Wind speeds in Napa average up to 17 km/h (11 mph) in June. Check the wind tab in the interactive chart above for hourly and daily wind forecasts.

The average UV index in Napa during June is 8. This is high — wear sunscreen and limit midday sun exposure.

UV 1–2 is low risk. UV 3–5 is moderate — wear sunscreen. UV 6–7 is high — limit midday sun exposure. UV 8+ is very high — seek shade and wear protective clothing.

Average humidity in Napa during June is around 54%. This is comfortable for most people.

The 'feels like' temperature accounts for wind chill and humidity to reflect how the air actually feels on your skin. In cold, windy conditions it will be lower than the actual temperature; in hot, humid conditions it will be higher.