Kauai weather in January
January in Kauai: nice, a little rain, with clean air — an excellent time to visit.
#9 of 12 months in Kauai · #113 of 604 destinations to visit in January · comfort 84/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Kauai climate normals — January
| Daytime high | 22°C / 72°F | 😎 nice |
|---|---|---|
| Nighttime low | 18°C / 64°F | |
| Feels like (high) | 23°C / 73°F | |
| Rainfall | 48 mm / 1.9 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 16°C / 61°F | |
| Sunshine | 9.6 h/day | |
| Daylight | 11 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 28 | 🍃 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 January — FAQ
- Is January a good time to visit Kauai?
- January in Kauai: nice, a little rain, with clean air — an excellent time to visit. It ranks #9 of 12 months for Kauai on SeasonMap's comfort score (84/100).
- What is the weather like in Kauai in January?
- In January, Kauai averages a daily high of 22.4°C and a low of 18°C, with about 48 mm of rain over roughly 11.2 rainy days.
- What is the air quality in Kauai in January?
- Kauai has a mean US Air Quality Index of about 28 in January.