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Key West in December: weather, sea & travel advice
This month's data profile
Sea conditions lead
Key West in December is climatically well suited to city breaks, family holidays, beach holidays and active holidays and hiking. The average daily high is around 24 °C, and the sea is about 24 °C. With about 8 rainy days it is moderate.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
86/100 · #4
Warmth
#9
Dryness
#4
Sun
#12
Sea warmth
#9
Published best categories: Overall, City break, Active, Family
Key West · DecemberPhoto: Ebyabe · CC BY-SA 3.0Climate facts
- Average high
- 24 °C
- Average low
- 23 °C
- Sea
- 24 °C
- Rainy days (est.)
- 8 rainy days (est.)
- Sun (est.)
- 5 h/day
- Humidity
- 79 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| November | 26 | 24 | 9 | 55 | 5.1 | 77 | 5.5 | 26 | 85 |
| December (selected) | 24 | 23 | 8 | 54 | 4.5 | 79 | 5.3 | 24 | 86 |
| January | 23 | 21 | 7 | 47 | 4.8 | 79 | 5.3 | 23 | 85 |
How do the previous and next months compare?
Baseline: December (86/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| November | -1 | +1.5 °C | +1.8 °C | +0.7 | +1.2 mm | +0.6 h | -1.8 % | +0.3 m/s | +1.7 °C |
| January | -1 | -1.2 °C | -1.5 °C | -0.6 | -6.5 mm | +0.3 h | -0.2 % | ±0 m/s | -1.3 °C |
All twelve months in context
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Frequently asked questions
How warm is Key West in December?
The average daily high is around 24 °C, with an average daily low of about 23 °C.
Can you swim in Key West in December?
The sea is about 24 °C (warm).
Does it rain a lot in Key West in December?
The curated estimate is about 8 rainy days per month, not a directly measured long-term average. Total precipitation averages around 54 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Key West?
By the climate score, February, March, April and December are the strongest months for Key West. For a beach trip: February, March, April and November. December is one of them.