Key Largo, Florida Keys weather in March
Temperature, sea and sunshine in March: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in March
Excellent
Best time to visit: October – May
What is the weather like in Key Largo, Florida Keys in March?
In March, Key Largo, Florida Keys is warm: daytime highs average 26 °C, and nights cool down to about 20 °C. The sea averages 24.7 °C – pleasant for swimming. The sun shines for around 8 hours a day. Rain falls on about 5 days, adding up to 32 mm. All in all, March is an excellent month for a holiday in Key Largo, Florida Keys.
March compared
How the weather changes from February to April. Tap a month to open it.
| FebruaryFeb | MarchMar | AprilApr | |
|---|---|---|---|
| Score | 89 | 94 | 95 |
| Day | 25° | 26° | 27° |
| Night | 19° | 20° | 22° |
| Sea | 24° | 25° | 26° |
| Sun | 7 h | 8 h | 8 h |
| Rain days | 4 | 5 | 6 |
More details for March
- Daylight
- 11 h 58 min07:32 – 19:31
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 14 daysdew point 18 °C or moreAll months
- Wind
- 24 km/haverage daily peakAll months
- Cloud cover
- 38 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %75 %
- Few rainy daysweight 20 %93 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in March
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
Key Largo, Florida Keys in March: quick answers
Is Key Largo, Florida Keys hot in March?
Warm rather than hot: in March, daytime highs in Key Largo, Florida Keys average 26 °C and nights cool to about 20 °C.
Can you swim in Key Largo, Florida Keys in March?
Yes. In March the sea averages 24.7 °C – pleasant for swimming.
Does it rain much in Key Largo, Florida Keys in March?
Rain falls on about 5 days, adding up to 32 mm.
Key Largo, Florida Keys month by month
The whole year in Key Largo, Florida KeysAll destinations: USAFlorida weather in MarchWhere to go in MarchSea temperature in March
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