March Weather in Key West

Last updated: March 2, 2024

The weather in Key West, United States, during March is characterized by an average temperature of 23°C (74°F). Highs can soar to 26°C (79°F), while lows may dip to 18°C (65°F). Typically, the humidity level in Key West throughout March hovers around 76%.

18°C (65°F)

Minimum temperature

23°C (74°F)

Average temperature

26°C (79°F)

Maximum temperature

76%

Humidity

Precipitation and Sunshine hours

In March, Key West averages 18 mm (0.7 inches) of rainfall, typically over the course of 4 rainy days. The month enjoys an average of 12 hours 1 minutes of daylight, with the sun shining for approximately 10 hours 45 minutes each day. Additionally, there is a 72% probability of sunny days during this period.

18 mm (0.7 inches)

Precipitation

4 rainy days

Rainy days

10 hours 45 minutes

Sunshine hours

72%

Chance of sun

UV Index

In March, the UV Index in Key West reaches a maximum of 11, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 10 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 1 1 3 6 9 10 11 11 9 6 3 1 1
Exposure Low Moderate High VeryHigh Extreme VeryHigh High Moderate Low
Time to burn 45 min 30 min 25 min 15 min 10 min 15 min 25 min 30 min 45 min

Compare Key West's Climate with Cities Worldwide