Kauai weather in March
March in Kauai: nice, rainy, with clean air — an excellent time to visit.
#11 of 12 months in Kauai · #179 of 604 destinations to visit in March · comfort 82/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Kauai climate normals — March
| Daytime high | 22°C / 72°F | 😎 nice |
|---|---|---|
| Nighttime low | 18°C / 64°F | |
| Feels like (high) | 23°C / 73°F | |
| Rainfall | 100 mm / 3.9 in | 🌧 rainy |
| Rainy days | 18 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 16°C / 61°F | |
| Sunshine | 10.6 h/day | |
| Daylight | 12 h | |
| Wind | 18 km/h / 11 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 March — FAQ
- Is March a good time to visit Kauai?
- March in Kauai: nice, rainy, with clean air — an excellent time to visit. It ranks #11 of 12 months for Kauai on SeasonMap's comfort score (82/100).
- What is the weather like in Kauai in March?
- In March, Kauai averages a daily high of 22°C and a low of 17.5°C, with about 99.7 mm of rain over roughly 17.8 rainy days.
- What is the air quality in Kauai in March?
- Kauai has a mean US Air Quality Index of about 31 in March.