June weather forecast
Key West, FL

Share
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 is a distinct month for Key West, as the average temperatures now consistently reach past the 80-degree mark, signifying the start of summer. The perpetual humidity, combined with the recurrent rainfall, brings a unique charm to the city. With longer daylight hours, beach and water-sport activities reach their peak. Nonetheless, June features the highest recorded temperatures, topping at 83.3°F (28.5°C), contributing to the tropical allure for those seeking warmth.

Temperature

June in Key West brings an average high-temperature of a still warm 83.3°F (28.5°C), nearly identical to the preceding month. Nighttime temperatures during June report a consistent average of 81.5°F (27.5°C).

Heat index

In June, the heat index is computed to be a hot 91.4°F (33°C). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an estimation of the warmth sensation when considering humidity levels. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.

Humidity

In June, the average relative humidity is 77%.

Rainfall

In Key West, during June, the rain falls for 19.5 days and regularly aggregates up to 3.46" (88mm) of precipitation. 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 June, the average ocean temperature is 83.3°F (28.5°C).
Note: For activities such as swimming and diving, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as particularly pleasant and satisfying for prolonged periods without feeling uneasy.

Daylight

With an average of 13h and 36min of daylight, June has the longest days of the year in Key West.
On the first day of the month, sunrise is at 6:38 am and sunset at 8:12 pm. On the last day of June, in Key West, sunrise is at 6:41 am and sunset at 8:20 pm EDT.

Sunshine

The average sunshine in June is 10.6h.

UV index

April through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: An average maximum UV index of 7 in June leads to these recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Boost your sun resistance with garments that are densely woven yet spacious. Warning! Sand and water reflections boost the intensity of UV exposure.

Frequently asked questions

Is it hot during June?

The average high-temperature, in June, in Key West, is 83.3°F (28.5°C), while the average low-temperature is 81.5°F (27.5°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in June is computed to be 91.4°F (33°C).

What is the average humidity in June in Key West?

The average relative humidity in June is 77%.

How many days does it rain in June?

In June, the rain falls for 19.5 days. Throughout June, 3.46" (88mm) of precipitation is accumulated.

How warm is the water in June?

In Key West, in June, the average water temperature 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?

With an average of 13h and 36min of daylight, June has the longest days of the year.

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

The average day length in June is 13h and 38min.

When is the sunrise / sunset in June?

On the first day of June, sunrise is at 6:38 am and sunset at 8:12 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?

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

What is the month with the highest UV index?

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

How high is the UV index in June?

The average daily maximum UV index in June is 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's 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).

Average pressure in June
Key West, FL

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

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%).

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").

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).

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).

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 4min

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 June: 10h and 4min

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 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).

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).

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).

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).

Key West, Florida, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location