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April Weather in Keys, United States

Last updated: June 24, 2025

In Keys, United States, the average temperature in April hovers around 15°C (59°F), with a range that can dip to a brisk -2°C (28°F) and peak at a warm 32°C (90°F). Expect about 158 mm (6.2 in) of precipitation spread over 10 days, complemented by an average humidity level of 75%. This mix of conditions promises a diverse and dynamic climate for your visit!

April Temperature in Keys

In April in Keys, the average temperature is 15°C (59°F), with maximums reaching 32°C (90°F) and minimums dropping as low as -2°C (28°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

April Weather in Keys: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Keys, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Keys, April typically has an average temperature of 15°C (59°F), with highs reaching up to 32°C (90°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec394254596978827976625045
Data source: Temperature data for Keys generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Keys

In Keys in April, the precipitation amount is 158 mm (6.2 in) over the course of 10 days.

April Precipitation Trends in Keys

The chart displays monthly precipitation patterns in Keys, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Keys, April typically receives around 158 mm (6.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec8910013415821278105129781536683
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Keys

In Keys in April, humidity is 75%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket enveloping you, making it feel more oppressive than refreshing, which can be a challenge for travelers seeking comfort while exploring the area.

April Average Humidity in Keys

This chart illustrates the average monthly humidity levels in Keys, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Keys is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%78%75%75%83%82%78%68%64%71%82%87%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Keys

In Keys in April, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Keys.

Maximum UV Index Levels in Keys for April

The chart shows the monthly maximum UV Index (UVI) for Keys in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Keys typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46710101111109753
Data source: Keys April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How April Weather in Keys Compares to Other Months

Weather in Keys varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Keys, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Keys, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)89 mm (3.5 inches)79%moderate
February Weather6°C (42°F)100 mm (4.0 inches)78%high
March Weather12°C (54°F)134 mm (5.3 inches)75%high
April Weather15°C (59°F)158 mm (6.2 inches)75%very high
May Weather21°C (69°F)212 mm (8.3 inches)83%very high
June Weather26°C (78°F)78 mm (3.1 inches)81%extreme
July Weather28°C (82°F)105 mm (4.1 inches)78%extreme
August Weather26°C (80°F)129 mm (5.1 inches)68%very high
September Weather24°C (76°F)78 mm (3.1 inches)64%very high
October Weather17°C (62°F)153 mm (6.0 inches)71%high
November Weather10°C (50°F)66 mm (2.6 inches)82%moderate
December Weather7°C (45°F)83 mm (3.3 inches)87%moderate

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