The highest day temperature in March 2025 was 82°F. The lowest night temperature was 67°F. The average values for day and night temperatures during March were 76.1°F и 74.1°F respectivly.

The average sea surface temperature in March 2025 for Key West was 77.2°F. The maximum and minimum values were 74.8°F and 80.2°F respectively.

Most of the days in March are sunny but you can also expect cloudy and gloomy days.

Precipitation total in March for Key West is 0.6 in. It makes march the least rainy month of the year.

The average wind speed in March is 13.7 mph. It makes March one of the most windy months of the year for Key West.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Key West in March is 8.1 hours.