Key West weather in March 2026

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

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

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

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

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

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

Q: Does it rain in Key West in March?

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

Expect daytime maximum temperatures of 79°F in Key West, Florida in March based on long-term weather averages. There are 10 hours of sunshine per day on average with typically 1.6 inches of rainfall in the month.

79
79°F max day temperature
10
10 hours of sunshine per day
5
5 days with some rainfall
68
68°F min night temperature
12
12 hours of daylight per day
L
Low heat & humidity
1.6
1.6 inches of monthly rainfall
10
10 (Very High) UV index
73
73°F sea temperature

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The March weather guide for Florida (Key West) 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) | Imperial (°F)