December · United States
Best time to visit Key West in December Weather, crowds & prices
Weather in Key West in December
Average temperature 23°C, 124 mm of rain, about 9 days with 6+ hours of sunshine and 81% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
December score
5.8/10
Ranked #12 of 12 months
- Avg temp
- 23°C
- Rainfall
- 124 mm
- Humidity
- 81%
- Days with 6h+ sun
- 9
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
December in Key West scores 5.8/10 for beach and coastal travel - ranked #12 of 12. Expect around 23°C, 124 mm of rain, and roughly 9 days with 6+ hours of sunshine this month.
Conch pastel lanes at the end of Overseas Highway at their best in January-April.
December in Key West — middling scores, decent value
With 23°C (74°F) on average, December delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
124 mm of rain signals a properly wet month, with only about 9 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 5.8/10 on the same scale — 12th of 12 months, versus 8.6/10 for the best month here.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
Budget for low-season pricing, and crowds are light for this destination.
If your dates are flexible, March is materially better in Key West — 2.8 points higher on the same scale.
Frequently asked
- What is the weather like in Key West in December?
- In December, Key West averages 23°C, 124 mm of rain, and about 9 days with 6+ hours of sunshine. Its climate-comfort score is 5.8/10.
- Is December a good time to visit Key West?
- December earns a 5.8/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Key West in December?
- Expect about 124 mm of rain in December. Average humidity is 81% and there are about 9 days with 6+ hours of sunshine.
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