Key West weather in July
Temperature, sea and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Excellent
Best time to visit: March – July, October – December
What is the weather like in Key West in July?
In July, Key West is hot: daytime highs average 29 °C, and even at night it stays warm at around 27 °C. The sea averages 29.7 °C – almost as warm as a bath. With around 10 hours of sunshine a day, there is plenty of sun. Rain is frequent, with about 13 rainy days and 67 mm in total. The air is often humid and muggy. All in all, July is an excellent month for a holiday in Key West.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 13 h 32 min06:47 – 20:19
- UV index
- 12 · extremeclear sky, noon (estimate)
- Muggy days
- 31 daysdew point 18 °C or more
- Wind
- 23 km/haverage daily peak
- Cloud cover
- 59 %on average
- Hot days
- 1 day30 °C or more
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 20 %39 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in July
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Key West in July: quick answers
Is Key West hot in July?
Yes. In July, Key West is hot: daytime highs average 29 °C and nights stay around 27 °C. On about 1 days the thermometer climbs to 30 °C or more.
Can you swim in Key West in July?
Yes. In July the sea averages 29.7 °C – almost as warm as a bath.
Does it rain much in Key West in July?
Rain is frequent, with about 13 rainy days and 67 mm in total.
Key West month by month
The whole year in Key WestAll destinations: USA
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)