Key Largo, Florida Keys 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
Excellent
Best time to visit: October – May
What is the weather like in Key Largo, Florida Keys in January?
In January, Key Largo, Florida Keys is warm: daytime highs average 23 °C, and nights cool down to about 18 °C. The sea averages 24.0 °C – pleasant for swimming. The sun shines for around 7 hours a day. Rain falls on about 5 days, adding up to 28 mm. All in all, January is an excellent month for a holiday in Key Largo, Florida Keys.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 87 | 81 | 89 |
| Day | 25° | 23° | 25° |
| Night | 19° | 18° | 19° |
| Sea | 25° | 24° | 24° |
| Sun | 6 h | 7 h | 7 h |
| Rain days | 5 | 5 | 4 |
More details for January
- Daylight
- 10 h 44 min07:08 – 17:52
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 11 daysdew point 18 °C or moreAll months
- Wind
- 23 km/haverage daily peakAll months
- Cloud cover
- 45 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−5America/New_York
How the score comes together
- Temperatureweight 35 %73 %
- Seaweight 25 %100 %
- Sunshineweight 20 %58 %
- Few rainy daysweight 20 %91 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in January
- Swimwear
- Sunscreen
Key Largo, Florida Keys in January: quick answers
Is Key Largo, Florida Keys hot in January?
Warm rather than hot: in January, daytime highs in Key Largo, Florida Keys average 23 °C and nights cool to about 18 °C.
Can you swim in Key Largo, Florida Keys in January?
Yes. In January the sea averages 24.0 °C – pleasant for swimming.
Does it rain much in Key Largo, Florida Keys in January?
Rain falls on about 5 days, adding up to 28 mm.
Key Largo, Florida Keys month by month
The whole year in Key Largo, Florida KeysAll destinations: USAFlorida weather in JanuaryWhere to go in JanuarySea temperature in January
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences