Kauai weather in April
April in Kauai: warm, a little rain, with clean air — an excellent time to visit.
#8 of 12 months in Kauai · #156 of 604 destinations to visit in April · comfort 85/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Kauai climate normals — April
| Daytime high | 23°C / 73°F | 🌤 warm |
|---|---|---|
| Nighttime low | 18°C / 65°F | |
| Feels like (high) | 24°C / 75°F | |
| Rainfall | 50 mm / 2 in | 🌦 some rain |
| Rainy days | 16 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 16°C / 61°F | |
| Sunshine | 11.3 h/day | |
| Daylight | 12.7 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 31 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Kauai?
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Kauai in April — FAQ
- Is April a good time to visit Kauai?
- April in Kauai: warm, a little rain, with clean air — an excellent time to visit. It ranks #8 of 12 months for Kauai on SeasonMap's comfort score (85/100).
- What is the weather like in Kauai in April?
- In April, Kauai averages a daily high of 22.9°C and a low of 18.2°C, with about 50.4 mm of rain over roughly 16.4 rainy days.
- What is the air quality in Kauai in April?
- Kauai has a mean US Air Quality Index of about 31 in April.