The best times to visit Key West for ideal weather are

November 5th to April 1st

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other Key West Travel Info

Weather in Key West

Temperature

Average temperatures in Key West vary somewhat. Considering humidity, temperatures feel hot for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is somewhat temperate — in the 41st percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Key West, the hottest months are August, July, and then September. See average monthly temperatures below. The warmest time of year is generally early August where highs are regularly around 90.6°F (32.6°C) with temperatures rarely dropping below 80.4°F (26.9°C) at night.

Key West Temperatures (Fahrenheit)

Key
High
Average
Low

Key West Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Key West Perceived Temperature (F)

Key
High
Average
Low

Key West Perceived Temperature (C)

Key
High
Average
Low

 

Average Key West Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 76.5 69.9 64.1
Feb 77.5 70.8 65
Mar 79.2 73 67.6
Apr 83.1 77.6 72.4
May 85.7 80.8 76.2
Jun 88.4 83.6 78.7
Jul 89.7 85 79.8
Aug 90.4 85.5 80.1
Sep 88.9 83.8 78.5
Oct 85.7 80.8 76.1
Nov 80.9 75.2 70.5
Dec 78.4 72.5 67.4

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 24.7 21.1 17.8
Feb 25.3 21.6 18.3
Mar 26.2 22.8 19.8
Apr 28.4 25.3 22.4
May 29.8 27.1 24.6
Jun 31.3 28.7 25.9
Jul 32.1 29.4 26.6
Aug 32.4 29.7 26.7
Sep 31.6 28.8 25.8
Oct 29.8 27.1 24.5
Nov 27.2 24 21.4
Dec 25.8 22.5 19.7

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Key West are December, April, and then November. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid May. For example, on the week of May 7th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid August with an average of 3 days of significant precipitation the week of August 6th.

When can you find snow in Key West? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Key West.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Key West (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 10% 0 1.6
Feb 12% 0 2.2
Mar 10% 0 1.5
Apr 9% 0 2
May 12% 0 3
Jun 21% 0 3.6
Jul 23% 0 4.2
Aug 32% 0 5.3
Sep 35% 0 7.2
Oct 23% 0 6.8
Nov 9% 0 2.2
Dec 8% 0 2.1

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 10 0 4.1
Feb 12 0 5.6
Mar 10 0 3.8
Apr 9 0 5.1
May 12 0 7.6
Jun 21 0 9.1
Jul 23 0 10.7
Aug 32 0 13.5
Sep 35 0 18.3
Oct 23 0 17.3
Nov 9 0 5.6
Dec 8 0 5.3

 

Humidity and Wind

Key West has some very humid months, and above average humidity throughout the year. The least humid month is May (64.5% relative humidity), and the most humid month is December (73.4%).

Wind in Key West is usually moderate. The windiest month is March, followed by April and November. March’s average wind speed of around 9.4 knots (10.9 MPH or 17.5 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early April where average top sustained speeds reach 14.8 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Key West.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 8.7 Gentle breeze 14.1 Significant breeze
Feb 8.5 Gentle breeze 13.6 Significant breeze
Mar 9.4 Gentle breeze 14.4 Significant breeze
Apr 9.2 Gentle breeze 14.1 Significant breeze
May 8.8 Gentle breeze 13.4 Significant breeze
Jun 7.8 Gentle breeze 13.4 Significant breeze
Jul 6.9 Light breeze 12.5 Significant breeze
Aug 7.2 Gentle breeze 13.2 Significant breeze
Sep 6.9 Light breeze 13.3 Significant breeze
Oct 8 Gentle breeze 13.4 Significant breeze
Nov 8.9 Gentle breeze 13.7 Significant breeze
Dec 8.6 Gentle breeze 13.6 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 70.1%
Feb 70.6%
Mar 65.1%
Apr 64.6%
May 64.5%
Jun 67.5%
Jul 65.6%
Aug 65.8%
Sep 69.6%
Oct 69.1%
Nov 69%
Dec 73.4%

 

Is it Safe to Travel to Key West?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Key West, FL, US is February, followed by January and March. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Key West in June. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 45.9 in June means 45.9% of the tourists vs. February.

 

 

Overall Key West Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel warm. Highs range from 87.1°F (30.6°C) and 78.2°F (25.7°C) with warmer temperatures in the later months. Rain is rare with 3 to 4 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see the most precipitation with 6 to 10 days of precipitation per month. June – August is the slowest season for tourism in Key West, so lodging and other accommodations may cost less than usual.

Fall (September through November)

Fall daily highs range from 89.8°F (32.1°C) and 79.3°F (26.3°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 3 to 11 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Winter (December through February)

Weather is perfect this time of year in Key West to be enjoyable for warm weather travelers. The average high during this season is between 78.6°F (25.9°C) and 75.5°F (24.2°C). On average, it rains or snows a smalll amount: consistently 3 times per month. These times of year are the busiest with tourists.

 

Best Times to Travel› the United States › Key West, FL, US