Kapaa, Kauai weather in January
Temperature, sea and sunshine in January: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in January
Good
Best time to visit: January – December
What is the weather like in Kapaa, Kauai in January?
In January, Kapaa, Kauai is warm: daytime highs average 24 °C, and even at night it stays warm at around 20 °C. The sea averages 24.2 °C – pleasant for swimming. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 61 mm in total. The air is often humid and muggy. All in all, January is a good month for a holiday in Kapaa, Kauai.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 76 | 77 | 76 |
| Day | 25° | 24° | 24° |
| Night | 21° | 20° | 20° |
| Sea | 25° | 24° | 24° |
| Sun | 7 h | 7 h | 7 h |
| Rain days | 13 | 11 | 10 |
More details for January
- Daylight
- 10 h 55 min07:18 – 18:13
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 17 daysdew point 18 °C or moreAll months
- Wind
- 16 km/haverage daily peakAll months
- Cloud cover
- 44 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−10Pacific/Honolulu
How the score comes together
- Temperatureweight 35 %83 %
- Seaweight 25 %100 %
- Sunshineweight 20 %62 %
- Few rainy daysweight 20 %53 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in January
- Swimwear
- Sunscreen
- Insect repellent
- Rain jacket or umbrella
Kapaa, Kauai in January: quick answers
Is Kapaa, Kauai hot in January?
Warm rather than hot: in January, daytime highs in Kapaa, Kauai average 24 °C and nights cool to about 20 °C.
Can you swim in Kapaa, Kauai in January?
Yes. In January the sea averages 24.2 °C – pleasant for swimming.
Does it rain much in Kapaa, Kauai in January?
Rain is frequent, with about 11 rainy days and 61 mm in total.
Kapaa, Kauai month by month
The whole year in Kapaa, KauaiAll destinations: USAHawaii weather in JanuaryWhere to go in JanuarySea temperature in January
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences