April weather forecastKey West, FL
April
Weather in April
April in Key West, Florida, sees an uptick in temperature and an increase in rainfall levels, a hallmark of the city's hot, humid and wet climate pattern. Even as the rains intensify, the city dons an aesthetic beauty that is noticeable. The weather patterns of April further exemplify the city's tropical monsoon climate, which is characterized by constant humidity and ample rainfall. On the brighter side, despite the humidity, the city exhibits unmatched vitality in April. Notably, there is a spike in sea temperature reaching 77.7°F (25.4°C), providing an opportunity for water-related activities.Temperature
The start of April marks an average high-temperature of a still moderately hot 77.4°F (25.2°C), hardly distinguishable from the conditions in March. Key West experiences a steady nighttime temperature of 74.8°F (23.8°C) throughout the month of April.Humidity
In Key West, Florida, the average relative humidity in April is 77%.Rainfall
In Key West, during April, the rain falls for 13.4 days and regularly aggregates up to 1.54" (39mm) of precipitation. In Key West, during the entire year, the rain falls for 199.2 days and collects up to 31.61" (803mm) of precipitation.Ocean temperature
In Key West, the average seawater temperature in April is 77.7°F (25.4°C).Note: Water temperature ranging from 77°F (25°C) to 84.2°F (29°C) is seen as very warm and delightful by everyone. During these temperatures, water activities become enjoyable, without causing discomfort for extended periods.
Daylight
In Key West, the average length of the day in April is 12h and 45min.On the first day of the month, sunrise is at 7:17 am and sunset at 7:43 pm. On the last day of April, sunrise is at 6:52 am and sunset at 7:56 pm EDT.
Sunshine
In Key West, the average sunshine in April is 9.7h.UV index
April through October, with an average maximum UV index of 7, are months with the highest UV index in Key West. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: During April, 7 as the daily maximum UV index converts into the following advice:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Warning! The reflection of sand and water increases the UV dose.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Key West, FL
- Average high temperature in April: 77.4°F
The warmest month (with the highest average high temperature) is August (85.3°F).
The month with the lowest average high temperature is January (72.7°F).
- Average low temperature in April: 74.8°F
The month with the highest average low temperature is August (82.9°F).
The coldest month (with the lowest average low temperature) is January (68.5°F).
Average pressure in April
Key West, FL
- Average pressure in April: 30.01"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are September and October (29.93"Hg).
Average wind speed in April
Key West, FL
- Average wind speed in April: 13.1mph
The windiest months (with the highest average wind speed) are January and November (14.4mph).
The calmest month (with the lowest average wind speed) is July (9.5mph).
Average humidity in April
Key West, FL
- Average humidity in April: 77%
The month with the highest relative humidity is February (78%).
The months with the lowest relative humidity are July, August and September (74%).
Average rainfall in April
Key West, FL
- Average rainfall in April: 1.54"
The wettest month (with the highest rainfall) is September (5.12").
The driest month (with the least rainfall) is March (0.67").
Average rainfall days in April
Key West, FL
- Average rainfall days in April: 13.4 days
The months with the highest number of rainy days are August and September (23.1 days).
The month with the least rainy days is February (11 days).
Average sea temperature in April
Key West, FL
- Average sea temperature in April: 77.7°F
The best month for swimming (with the highest average sea temperature) is August (86.9°F).
The coldest months (with the lowest average sea temperature) are January and February (71.2°F).
Average daylight in April /
Average sunshine in April
Key West, FL
- Average daylight in April: 12h and 42min
The month with the longest days is June (Average daylight: 13h and 36min).
The month with the shortest days is December (Average daylight: 10h and 36min).
- Average sunshine in April: 9h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in April
Key West, FL
- Average sunshine days in April: 13.6 days
The month with the most sunshine days is March (17 days).
The month with the least sunshine days is September (4.5 days).
Average UV index in April
Key West, FL
- Average UV index in April: 7
The months with the highest UV index are April, May, June, July, August, September and October (UV index 7).
The month with the lowest UV index is January (UV index 5).
Average cloud cover in April
Key West, FL
- Average cloud cover in April: 23
The month with the most cloud cover is January (Cloud cover 34).
The month with the least cloud cover is April (Cloud cover 23).
Average visibility in April
Key West, FL
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
