Key West weather in March 2020

26
26°C max day temperature
10
10 hours of sunshine per day
5
5 days with some rainfall
20
20°C min night temperature
12
12 hours of daylight per day
L
Low heat & humidity
40
40 mm of monthly rainfall
10
10 (Very High) UV index
23
23°C sea temperature

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

The March weather guide for Key West, Florida 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.

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

Guide to Key West weather in March

The average maximum daytime temperature in Key West in March is a warm 26°C (79°F) with low heat & humidity. The average night-time temperature is usually a comfortable 20°C (68°F). There are usually 10 hours of bright sunshine each day, which represents 81% of the 12 hours of daylight.

Expect 40mm (1.6 inches) of rainfall across the whole of March with 5 days with some rain falling. Maximum UV levels will be very high (10 UV index) at midday when the skies are clear.

The average sea temperature in and around Key West in March is 23°C (73°F).