June 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 June

June, the first month of the summer in Key West, is also a moderately hot month, with an average temperature ranging between min 81.5°F (27.5°C) and max 83.3°F (28.5°C).

Temperature

In Key West, the average high-temperature in June is practically the same as in May - a still warm 83.3°F (28.5°C). The average low-temperature, in Key West, is 81.5°F (27.5°C).

Heat index

The average heat index in June is appraised at a tropical 91°F (32.8°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like activity, metabolic differences, wind, and clothing affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in June is 77%.

Rainfall

In Key West, during 19.5 rainfall days, 3.46" (88mm) of precipitation is typically accumulated. In Key West, Florida, 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 water temperature is 83.3°F (28.5°C).
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

June has the longest days of the year in Key West, with an average of 13h and 38min of daylight.
On the first day of June, sunrise is at 6:38 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 8:20 pm EDT.

Sunshine

In Key West, the average sunshine in June is 10.6h.

UV index

The months with the highest UV index are April through October, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: The average daily UV index of 7 in June transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in June in Key West?

In Key West, in June, the average high-temperature is 83.3°F (28.5°C), and the average low-temperature is 81.5°F (27.5°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in June is appraised at 91°F (32.8°C).

What is the average humidity in June in Key West?

The average relative humidity in June in Key West, Florida, is 77%.

How many days does it rain in June in Key West?

In Key West, during June, the rain falls for 19.5 days and regularly aggregates up to 3.46" (88mm) of precipitation.

What is the ocean temperature in June in Key West?

In Key West, the average seawater temperature in June is 83.3°F (28.5°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.

When are the longest days in Key West?

The month with the longest days in Key West, Florida, is June, with an average of 13h and 38min of daylight.

What is the average length of the day in June in Key West?

In Key West, the average day length in June is 13h and 38min.

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

On the first day of June, sunrise is at 6:38 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 8:20 pm EDT.

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

The average sunshine duration in June in Key West, Florida, is 10.6h.

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

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

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

In Key West, Florida, the average daily maximum UV index in June is 7. A UV Index value of 6 to 7 symbolizes a high health threat from unprotected exposure to UV radiation.

Average temperature in June
Key West, FL

Average temperature in June - Key West, FL
  • Average high temperature in June: 83.3°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 June: 81.5°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 June
Key West, FL

Average pressure in June - Key West, FL
  • Average pressure in June: 29.98"

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 June
Key West, FL

Average wind speed in June - Key West, FL
  • Average wind speed in June: 10.3mph

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 June
Key West, FL

Average humidity in June - Key West, FL
  • Average humidity in June: 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 June
Key West, FL

Average rainfall in June - Key West, FL
  • Average rainfall in June: 3.46"

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 June
Key West, FL

Average rainfall days in June - Key West, FL
  • Average rainfall days in June: 19.5 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 June
Key West, FL

Average sea temperature in June - Key West, FL
  • Average sea temperature in June: 83.3°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 June /
Average sunshine in June
Key West, FL

Average daylight in June / Average sunshine in June - Key West, FL
  • Average daylight in June: 13h and 38min

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 June: 10.6h

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 June
Key West, FL

Average sunshine days in June - Key West, FL
  • Average sunshine days in June: 7.6 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 June
Key West, FL

Average UV index in June - Key West, FL
  • Average UV index in June: 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 June
Key West, FL

Average cloud cover in June - Key West, FL
  • Average cloud cover in June: 30

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 June
Key West, FL

Average visibility in June - Key West, FL
  • Average visibility in June: 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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