Key West 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: March – July, October – December
What is the weather like in Key West in January?
In January, Key West is warm: daytime highs average 23 °C, and even at night it stays warm at around 20 °C. The sea averages 22.7 °C – refreshing for a swim. The sun shines for around 8 hours a day. Rain falls on about 5 days, adding up to 32 mm. It is often windy, with gusts of around 30 km/h. All in all, January is a good month for a holiday in Key West.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 87 | 74 | 80 |
| Day | 24° | 23° | 23° |
| Night | 22° | 20° | 21° |
| Sea | 24° | 23° | 23° |
| Sun | 8 h | 8 h | 8 h |
| Rain days | 5 | 5 | 4 |
More details for January
- Daylight
- 10 h 46 min07:13 – 17:59
- UV index
- 5 · moderateclear sky, noon (estimate)
- Muggy days
- 15 daysdew point 18 °C or more
- Wind
- 30 km/haverage daily peak
- Cloud cover
- 45 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC−5America/New_York
How the score comes together
- Temperatureweight 35 %58 %
- Seaweight 25 %81 %
- Sunshineweight 20 %78 %
- Few rainy daysweight 20 %90 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in January
- Swimwear
- Sunscreen
- Windproof jacket
Key West in January: quick answers
Is Key West hot in January?
Warm rather than hot: in January, daytime highs in Key West average 23 °C and nights cool to about 20 °C.
Can you swim in Key West in January?
Yes. In January the sea averages 22.7 °C – refreshing for a swim.
Does it rain much in Key West in January?
Rain falls on about 5 days, adding up to 32 mm.
Key West month by month
The whole year in Key WestAll destinations: USA
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)