What's the Weather in Key West?

Average monthly temperature, rainfall and water temps in Key West

Buoy monument marking southern most point in United States at Key West, Florida
••• Getty Images/Danita Delimont

If you would like to ​​escape the cold north during the winter, there is no warmer place to be than in Key West. With average daytime temperatures in the mid- to high-70s, during December, January, and February, the weather in the southernmost city in the continental U.S. is definitely a big draw.

Wondering what to pack for a vacation in Key West? Mild year-round temperatures call for cool and comfortable clothing, including shorts, tank tops, and sandals.

Of course, when in Key West, just about anything goes -- ​including what to wear.

Key West has an overall average high temperature of 83° and an average low of 73°. The highest recorded temperature in Key West was 100° in 1886 and the lowest recorded temperature was a very cool 41° in 1981. On average Key West's warmest month is August and January is the average coolest month. The maximum average rainfall usually falls in September.

The Florida Keys, including Key West, have largely escaped effects from hurricanes in the last decade. The Atlantic Hurricane Season runs from June 1 through November 30 each year and if you are visiting during hurricane season, it is important to note that Key West will require a mandatory evacuation if a storm threatens.

Looking for specific monthly weather information? Here are the average monthly temperatures, rainfall as well as Gulf and Atlantic Ocean temperatures for Key West:

January

  • Average High: 75° F
  • Average Low: 65° F
  • Average Precipitation: 2.22 inches
  • Average Gulf of Mexico Temperature: 69° F
  • Average Atlantic Ocean Temperature: 71.3° F

February

  • Average High Temperature: 76° F
  • Average Low Temperature: 66° F
  • Average Precipitation: 1.51 inches
  • Average Gulf of Mexico Temperature: 70° F
  • Average Atlantic Ocean Temperature: 71.2° F

March

  • Average High Temperature: 79° F
  • Average Low Temperature: 69° F
  • Average Precipitation: 1.86 inches
  • Average Gulf of Mexico Temperature: 75° F
  • Average Atlantic Ocean Temperature: 73.3° F

April

  • Average High Temperature: 82° F
  • Average Low Temperature: 72° F
  • Average Precipitation: 2.06 inches
  • Average Gulf of Mexico Temperature: 78° F
  • Average Atlantic Ocean Temperature: 77.7° F

May

  • Average High Temperature: 85° F
  • Average Low Temperature: 76° F
  • Average Precipitation: 3.48 inches
  • Average Gulf of Mexico Temperature: 82° F
  • Average Atlantic Ocean Temperature: 80.6° F

June

  • Average High Temperature: 88° F
  • Average Low Temperature: 79° F
  • Average Precipitation: 4.57 inches
  • Average Gulf of Mexico Temperature: 85° F
  • Average Atlantic Ocean Temperature: 83.3° F

July

  • Average High Temperature: 89° F
  • Average Low Temperature: 80° F
  • Average Precipitation: 3.27 inches
  • Average Gulf of Mexico Temperature: 87° F
  • Average Atlantic Ocean Temperature: 85.4° F

August

  • Average High Temperature: 90° F
  • Average Low Temperature: 79° F
  • Average Precipitation: 5.40 inches
  • Average Gulf of Mexico Temperature: 87° F
  • Average Atlantic Ocean Temperature: 86.9° F

September

  • Average High Temperature: 88° F
  • Average Low Temperature: 79° F
  • Average Precipitation: 5.45 inches
  • Average Gulf of Mexico Temperature: 86° F
  • Average Atlantic Ocean Temperature: 85.4° F

October

  • Average High Temperature: 85° F
  • Average Low Temperature: 76° F
  • Average Precipitation: 4.34 inches
  • Average Gulf of Mexico Temperature: 82° F
  • Average Atlantic Ocean Temperature: 82.8° F

November

  • Average High Temperature: 81° F
  • Average Low Temperature: 72° F
  • Average Precipitation: 2.64 inches
  • Average Gulf of Mexico Temperature: 76° F
  • Average Atlantic Ocean Temperature: 78.4° F

December

  • Average High Temperature: 77° F
  • Average Low Temperature: 67° F
  • Average Precipitation: 2.14 inches
  • Average Gulf of Mexico Temperature: 72° F
  • Average Atlantic Ocean Temperature: 74.5° F

Visit weather.com for current weather conditions, 5- or 10-day forecast and more.