April weather forecast
Key West, FL

A beach pier in Key West, Florida, with palm trees in the background
A beach pier in Key West, Florida, with palm trees in the background

Weather in April

April, the same as March, is another warm spring month in Key West, Florida, with an average temperature fluctuating between 77.4°F (25.2°C) and 74.8°F (23.8°C).

Temperature

In Key West, the average high-temperature in April is relatively the same as in March - a still moderately hot 77.4°F (25.2°C). In April, in Key West, the average low-temperature is 74.8°F (23.8°C).

Humidity

In April, the average relative humidity in Key West 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. Throughout the year, in Key West, there are 199.2 rainfall days, and 31.61" (803mm) of precipitation is accumulated.

Ocean temperature

In Key West, the average seawater temperature in April is 77.7°F (25.4°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In April, the average length of the day in Key West is 12h and 45min.
On the first day of the month, sunrise is at 7:18 am and sunset at 7:43 pm. On the last day of April, in Key West, sunrise is at 6:52 am and sunset at 7:56 pm EDT.

Sunshine

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. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 7 in April interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in April in Key West?

The average relative humidity in April is 77%.

How much does it rain in Key West in April?

In Key West, in April, during 13.4 rainfall days, 1.54" (39mm) of precipitation is typically accumulated.

What is the ocean temperature in April in Key West?

In Key West, Florida, in April, the average water temperature is 77.7°F (25.4°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Key West have in April?

The average day length in April in Key West, Florida, is 12h and 45min.

When is the sunrise / sunset in April in Key West?

On the first day of April in Key West, Florida, sunrise is at 7:18 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 7:56 pm EDT.

How many hours of sunshine does Key West have in April?

In April, the average sunshine duration in Key West is 9.7h.

What is the month with the highest UV index in Key West?

The months with the highest UV index in Key West, Florida, are April through October, with an average maximum UV index of 7.

What is the UV index intensity in April in Key West?

The average daily maximum UV index in April in Key West is 7. A UV Index of 6 to 7 symbolizes a high health threat from exposure to Sun's UV rays.

Average temperature in April
Key West, FL

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).

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Average pressure in April
Key West, FL

Average pressure in April - Key West, FL
  • Average pressure in April: 30.01"

The month with the highest atmospheric pressure is January (30.09").
The months with the lowest atmospheric pressure are September and October (29.93").

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Average wind speed in April
Key West, FL

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).

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Average humidity in April
Key West, FL

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%).

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Average rainfall in April
Key West, FL

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").

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Average rainfall days in April
Key West, FL

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).

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Average sea temperature in April
Key West, FL

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).

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Average daylight in April /
Average sunshine in April
Key West, FL

Average daylight in April / Average sunshine in April - Key West, FL
  • Average daylight in April: 12h and 45min

The month with the longest days is June (Average daylight: 13h and 38min).
The month with the shortest days is December (Average daylight: 10h and 39min).

  • Average sunshine in April: 9.7h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 6.3h).

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Average sunshine days in April
Key West, FL

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).

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Average UV index in April
Key West, FL

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).

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Average cloud cover in April
Key West, FL

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).

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Average visibility in April
Key West, FL

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).

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