Napa weather in June
June in Napa: hot, dry, with clean air — an excellent time to visit.
#3 of 12 months in Napa · #67 of 604 destinations to visit in June · comfort 92/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Napa climate normals — June
| Daytime high | 30°C / 87°F | 🥵 hot |
|---|---|---|
| Nighttime low | 15°C / 58°F | |
| Feels like (high) | 30°C / 86°F | |
| Rainfall | 1 mm / 0 in | ☀️ dry |
| Rainy days | 0 days | |
| Humidity | 56% | 🍃 comfortable |
| Dew point | 10°C / 50°F | |
| Sunshine | 13.4 h/day | |
| Daylight | 14.8 h | |
| Wind | 17 km/h / 11 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Napa in June — FAQ
- Is June a good time to visit Napa?
- June in Napa: hot, dry, with clean air — an excellent time to visit. It ranks #3 of 12 months for Napa on SeasonMap's comfort score (92/100).
- What is the weather like in Napa in June?
- In June, Napa averages a daily high of 30.3°C and a low of 14.5°C, with about 0.9 mm of rain over roughly 0.2 rainy days.
- What is the air quality in Napa in June?
- Napa has a mean US Air Quality Index of about 35 in June.