The highest day temperature in July 2025 was 91°F. The lowest night temperature was 84°F. The average values for day and night temperatures during July were 89.0°F и 86.5°F respectivly.

The average sea surface temperature in July 2025 for Key West was 90.8°F. The maximum and minimum values were 89.0°F and 92.2°F respectively.

Most of the days in July are cloudy but you can also expect sunny or gloomy days.

Precipitation total in July for Key West is 4.1 in. It makes july one of the most rainy months of the year.

The average wind speed in July is 10.0 mph. It makes July one of the most windless months of the year for Key West.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Key West in July is 8.4 hours.