Kauai weather in July
July in Kauai: warm, a little rain, with clean air — an excellent time to visit.
#3 of 12 months in Kauai · #101 of 604 destinations to visit in July · comfort 89/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Kauai climate normals — July
| Daytime high | 25°C / 78°F | 🌤 warm |
|---|---|---|
| Nighttime low | 21°C / 69°F | |
| Feels like (high) | 28°C / 82°F | |
| Rainfall | 39 mm / 1.5 in | 🌦 some rain |
| Rainy days | 18 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | 18°C / 64°F | |
| Sunshine | 12.3 h/day | |
| Daylight | 13.3 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 24 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Kauai?
Loading map…
Kauai in July — FAQ
- Is July a good time to visit Kauai?
- July in Kauai: warm, a little rain, with clean air — an excellent time to visit. It ranks #3 of 12 months for Kauai on SeasonMap's comfort score (89/100).
- What is the weather like in Kauai in July?
- In July, Kauai averages a daily high of 25.4°C and a low of 20.7°C, with about 39.3 mm of rain over roughly 18.2 rainy days.
- What is the air quality in Kauai in July?
- Kauai has a mean US Air Quality Index of about 24 in July.