Key West Weather in April
April's weather is the sunniest and least humid of the year for Key West, Florida. That combined with warm, dry days makes for plenty of spectacular island weather this month.
This page gives detailed information on the typical April temperature, precipitation, sun, humidity, wind and storms for Key West. The numbers here are historical averages based on climate data gathered at the Key West International Airport, located on Key West Island.
Temperature
| 83 °F | April average high | 28 °C |
| 73 °F | April average low | 23 °C |
| 25 days | 80 °F max. or more (27 °C) |
| 8 days | 70 °F min. or less (21 °C) |
The temperature in Key West is usually over 70 degrees Fahrenheit (21 degrees Celsius) every day during April. Temperatures above 90 °F (32 °C) occur in rare years.
Only occasionally does the thermometer dip to 60 °F (16 °C) or below in April, an event that doesn't happen every year. And this month normally never gets as cold as 50 °F (10 °C).
Rain
| 2.1 in | total precipitation | 53 mm |
| 5 days | of rain |
Half the time, Key West receives 0.8 to 2.7 inches (20 to 68 mm) of rainfall in April. One in four years has drier weather, while another one in four is wetter.
Sun
| 84 % | sunshine |
| 13 days | clear skies |
April is Key West's sunniest month. The sun's rays reach the ground on the vacation island during 84 percent of daylight hours on average in April, for a total of 321 hours in the month. Typically on 13 days this month the sky is mainly clear, with at most 30 percent cloud cover.
Sunlight in April at Key West lasts for 12 hours and 44 minutes a day on average. The shortest day of the month is the 1st with 12 hours and 25 minutes of daylight. By the end of the month, the days have lengthened to 13:04 from sunrise to sunset. These durations can vary by a minute or two from year to year.
Humidity
| 70 % | April average humidity |
The relative humidity in Key West during April usually peaks at 77 percent in the morning then drops to 63 percent by early afternoon.
| Local Time | 1 am | 4 am | 7 am | 10 am | 1 pm | 4 pm | 7 pm | 10 pm | Humidity % | 75 | 77 | 76 | 66 | 63 | 63 | 69 | 73 |
Wind
| 12.2 mph | April wind speed average | 19.6 kph |
April is normally the windiest month for Key West.
Storms
| 1 day | rainfall of 0.5 inches (13 mm) or more |
| 2 days | with thunderstorms in April |
Reference
The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.