Napa Valley weather in April
Temperature, rain and sunshine in April: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in April
Excellent
Best time to visit: April – October
What is the weather like in Napa Valley in April?
In April, Napa Valley is mild: daytime highs average 20 °C, and nights cool down to about 8 °C. The sun shines for around 9 hours a day. Rain is rare: about 5 days bring 35 mm in total. All in all, April is an excellent month for a holiday in Napa Valley.
April compared
How the weather changes from March to May. Tap a month to open it.
More details for April
- Daylight
- 13 h 9 min06:35 – 19:44
- UV index
- 8 · very highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 15 km/haverage daily peakAll months
- Cloud cover
- 44 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Time zone
- UTC−7America/Los_Angeles
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %98 %
- Few rainy daysweight 30 %96 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in April
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
Napa Valley in April: quick answers
Is Napa Valley hot in April?
No. In April, Napa Valley is mild: daytime highs average 20 °C and nights drop to about 8 °C.
Does it rain much in Napa Valley in April?
Rain is rare: about 5 days bring 35 mm in total.
Napa Valley month by month
The whole year in Napa ValleyAll destinations: USAWhere to go in April
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences