Typical December weather
Key West
Florida · December
78° days
68° nights
about 3 rainy days · 10½ hours of daylight · ocean 74°
What to pack
- Swimsuit
- Sunscreen
What December feels like
Early December is quiet and lovely; the last two weeks are the busiest and priciest of the winter. Cold fronts arrive here as wind rather than cold, so expect a choppy crossing if you booked a boat.
Expect about 3 days with real rain — enough to notice, not enough to plan around. It’s sticky — light fabrics and an afternoon break earn their keep.
Can you swim?
The ocean runs about 74° — comfortable for swimming.
The numbers
| Typical high | 78° |
|---|---|
| Typical low | 68° |
| Days with real rain | 3 |
| Total rain | 2.2 in |
| Humidity | sticky |
| Water temperature | 74° |
| Sunrise / sunset (mid-month) | 7:03 am / 5:41 pm |