December · United States
Best time to visit Kauai in December Weather, crowds & prices
Weather in Kauai in December
Average temperature 24°C, 58 mm of rain, about 13 days with 6+ hours of sunshine and 76% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
December score
7.9/10
Ranked #12 of 12 months
- Avg temp
- 24°C
- Rainfall
- 58 mm
- Humidity
- 76%
- Days with 6h+ sun
- 13
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
December in Kauai scores 7.9/10 for beach and coastal travel - ranked #12 of 12. Expect around 24°C, 58 mm of rain, and roughly 13 days with 6+ hours of sunshine this month.
Kauai's Na Pali coast, Waimea canyon and rainforest waterfalls make it Hawaii's greenest island.
December holds up well in Kauai — 12th best month
With 24°C (76°F) on average, December delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
Budget for roughly 58 mm of rain this month — a flexible day or two helps — with about 13 days with 6+ hours of sunshine and 10.7 hours of daylight to work around it.
That is 7.9/10 on the same scale — 12th of 12 months, versus 9.8/10 for the best month here.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
Expect low-season pricing, and crowds are light for this destination.
If your dates are flexible, June is materially better in Kauai — 1.9 points higher on the same scale.
Frequently asked
- What is the weather like in Kauai in December?
- In December, Kauai averages 24°C, 58 mm of rain, and about 13 days with 6+ hours of sunshine. Its climate-comfort score is 7.9/10.
- Is December a good time to visit Kauai?
- December earns a 7.9/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Kauai in December?
- Expect about 58 mm of rain in December. Average humidity is 76% and there are about 13 days with 6+ hours of sunshine.
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Kauai, United States. Live activities and tours from GetYourGuide, matched to this destination.