Key Largo weather in March 2026

Q: How hot is it in Key Largo in March?

Daytime temperatures usually reach 25°C in Key Largo in March with low heat and humidity, falling to 18°C at night.

Q: How sunny is it in Key Largo in March?

There are normally 9 hours of bright sunshine each day in Key Largo in March - that's 75% of daylight hours.

Q: How warm is the sea around Key Largo in March?

The average sea temperature around Key Largo in March is 24°C.

Q: Does it rain in Key Largo in March?

There are usually 6 days with some rain in Key Largo in March and the average monthly rainfall is 53mm.

Expect daytime maximum temperatures of 27°C in Key Largo, Florida in March based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 57 mm of rainfall in the month.

27
27°C max day temperature
9
9 hours of sunshine per day
6
6 days with some rainfall
16
16°C min night temperature
12
12 hours of daylight per day
L
Low heat & humidity
57
57 mm of monthly rainfall
10
10 (Very High) UV index
24
24°C sea temperature

More about Key Largo

Key Largo by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Florida

Travelbag: up to 50% off 2026 holidays

Sale

Save up to 50% on 2026 holidays & tours with Travelbag
Book selected stays in popular destinations around the world
Travel before 31st December 2026 (inclusive)

Go to Travelbag deal >>

Expires at 23:59 on Saturday 28th Feb 2026 · View all Travelbag offers

The March weather guide for Florida (Key Largo) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)