June weather forecast and climate
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
June is the beginning of the summer in Key West and lies in the wet season with an average of 4.1" (104.1mm) of rainfall. It has the longest days at 14 hours that are convenient for sunset tours, shopping in the evening, or walking on the beach.
June is a slow season for tourism with the mercury touching an average high temperature of 88°F (31.1°C). Smathers beach is a wonderful place in the warm June weather with plenty of food trucks, and umbrella and chair rentals.
Average temperature in June - Key West, FL
  • Average high temperature in June: 87.8°F

The warmest month (with the highest average high temperature) is August (89.4°F).
The month with the lowest average high temperature is January (74.3°F).

  • Average low temperature in June: 78.8°F

The month with the highest average low temperature is July (79.8°F).
The coldest month (with the lowest average low temperature) is January (64.2°F).

Average humidity in June - Key West, FL
  • Average humidity in June: 74%

The month with the highest relative humidity is December (76.2%).
The month with the lowest relative humidity is April (70.1%).

Average rainfall in June - Key West, FL
  • Average rainfall in June: 5.7"

The wettest month (with the highest rainfall) is September (6.5").
The driest month (with the lowest rainfall) is March (1.6").

Average rainfall days in June - Key West, FL
  • Average rainfall days in June: 11 days

The month with the highest number of rainy days is September (16.2 days).
The month with the lowest number of rainy days is April (4.5 days).

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).
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: 13.6h

The month with the longest days is June (Average daylight: 13.6h).
The month with shortest days is December (Average daylight: 10.6h).

  • Average sunshine in June: 10.5h

The month with most sunshine is May (Average sunshine: 11h).
The month with least sunshine is December (Average sunshine: 7.6h).

Average UV index in June - Key West, FL
  • Average UV index in June: 11

Months with the highest UV index are April, May, June, July and August (UV index 11).
Months with the lowest UV index are January and December (UV index 6).

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