Napa weather in April
April in Napa: nice, dry, with clean air — one of the best months to visit.
#1 of 12 months in Napa · #10 of 604 destinations to visit in April · comfort 95/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Napa climate normals — April
| Daytime high | 23°C / 73°F | 😎 nice |
|---|---|---|
| Nighttime low | 9°C / 49°F | |
| Feels like (high) | 22°C / 72°F | |
| Rainfall | 15 mm / 0.6 in | ☀️ dry |
| Rainy days | 3 days | |
| Humidity | 63% | 💧 humid |
| Dew point | 6°C / 43°F | |
| Sunshine | 11.2 h/day | |
| Daylight | 13.2 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 38 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Napa?
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Napa in April — FAQ
- Is April a good time to visit Napa?
- April in Napa: nice, dry, with clean air — one of the best months to visit. It ranks #1 of 12 months for Napa on SeasonMap's comfort score (95/100).
- What is the weather like in Napa in April?
- In April, Napa averages a daily high of 22.9°C and a low of 9.3°C, with about 14.9 mm of rain over roughly 3.2 rainy days.
- What is the air quality in Napa in April?
- Napa has a mean US Air Quality Index of about 38 in April.