Published Updated 4 min readBeach
Key West Weather by Month for Renters (NOAA Normals)
Quick answer
NOAA's 1991–2020 Climate Normals for the Key West International Airport station show average highs from 75.8°F (January) to 90.6°F (August) and average lows from 65.5°F (January) to 80.6°F (July). September is the wettest month (7.24 in) and March the driest (1.53 in). On BnB Search, the Key West and Florida Keys vacation rentals hub lists 333 places, 257 of them individual stays. Sources are linked at the end.
Key West climate at a glance (NOAA 1991–2020)
- Station: Key West International Airport (NOAA ID USW00012836), elevation about 4 ft.
- Warmest average high: 90.6°F in August.
- Coldest average low: 65.5°F in January.
- Wettest month: September, 7.24 in of precipitation.
- Driest month: March, 1.53 in.
Why this matters for renters: the numbers below tell you what to pack and what to ask a host before you book. They do not say when to go; that depends on what you want to do.
Monthly normals table
| Month | Avg high (°F) | Avg low (°F) | Precip (in) |
|---|---|---|---|
| January | 75.8 | 65.5 | 1.83 |
| February | 77.4 | 67.1 | 1.54 |
| March | 79.6 | 69.3 | 1.53 |
| April | 82.6 | 73.1 | 2.07 |
| May | 85.9 | 76.4 | 3.12 |
| June | 88.7 | 79.4 | 4.23 |
| July | 90.2 | 80.6 | 3.63 |
| August | 90.6 | 80.5 | 5.37 |
| September | 89.0 | 79.2 | 7.24 |
| October | 85.8 | 76.8 | 5.67 |
| November | 81.0 | 72.2 | 2.05 |
| December | 77.7 | 68.3 | 2.16 |
About this data
These are NOAA National Centers for Environmental Information (NCEI) 1991–2020 U.S. Climate Normals for the Key West International Airport station (ID USW00012836), elevation 1 m (about 4 ft). NOAA computed the high-temperature normal from 26 years of data, the low from 25 and precipitation from 30; its completeness flags for these values are S ("S" standard, "R" representative, as defined in NOAA's documentation). Normals are 30-year averages, not a forecast: any given week can be much warmer, colder, wetter or drier.
The station is the Key West airport. It describes Key West, not the Middle or Upper Keys.
NOAA does not publish a complete monthly snowfall normal for this station, so this guide does not list snowfall.
Packing notes from the numbers
- Average highs reach 90°F or more in July and August. Pack sun protection and plan for heat in the middle of the day.
- Average precipitation is 4 inches or more in June, August, September and October. A rain jacket or umbrella is worth packing.
What our Key West and Florida Keys listings show
These counts come from BnB Search's own directory data and change when listings are added or removed.
- 333 listings in total: 257 individual stays, 34 resorts, inns or lodging businesses, 39 rental companies, property managers or real estate offices and 3 other local listings that are not rentals.
- Area tags: Key West 206, Key Largo 20, Islamorada 14, Marathon 13, Big Pine Key 4. Our area tags are broad, so open the map pin to see exactly where a listing is.
- Words in the stay titles: of the 257 stays, 33 mention oceanfront, beachfront or an ocean view; 16 mention lakefront, waterfront or lake access; 13 mention a dock; 3 mention a hot tub or spa; 36 mention a pool; 10 mention pets or dogs; 2 mention cabin; 22 mention condo. Hosts write these titles themselves, so confirm each feature before you book.
Browse them on the Key West and Florida Keys hub (map and filters) or in the full Key West and Florida Keys listings directory.
Before you book a Key West and Florida Keys rental
- For May, June, July, August, September and October, when average highs are 85°F or more, confirm the rental has air conditioning in the bedrooms, not just the living area.
- For June, August, September and October, read the cancellation and weather policy before you book, and plan an indoor backup for rainy days.
- Check a current forecast from the National Weather Service (weather.gov) a few days before you travel; normals do not replace a forecast.
FAQ
Which month is warmest and which is coldest at the Key West International Airport station?
August has the highest average high (90.6°F). January has the lowest average low (65.5°F). These are 1991–2020 normals.
Which month is wettest?
September, with 7.24 inches of average precipitation. March is the driest at 1.53 inches.
How many Key West and Florida Keys rentals does BnB Search list?
333 listings, including 257 individual stays. The rest are lodging businesses, rental companies or other local listings.
Does BnB Search book the stay?
No. Compare on the hub, then book on the site linked from the listing.
Sources
- NOAA NCEI U.S. Climate Normals, Key West International Airport station (USW00012836)
- NOAA NCEI 1991–2020 monthly normals data file for USW00012836 (CSV)
- NOAA NCEI monthly normals documentation (completeness flags)
Related
Key West facts for rental guests · Florida Keys vacation rentals · All Florida Keys listings