Key West Weather in July

July bring the best of summer's weather to Key West, Florida. The month typically sees a lull in severe storms, along with a drop in humidity and rainfall.

This page gives detailed information on the typical July temperature, precipitation, sun, humidity, wind and storms for Key West. The numbers here are historical averages based on climate data gathered at the Key West International Airport, located on Key West Island.

Temperature Weather iconTemperature

90 °F July average high 32 °C
81 °F July average low 27 °C

July is one of Key West's hottest months overall, with temperatures peaking from the 22th to the 31st. These dates have daily highs averaging 91 degrees Fahrenheit (33 degrees Celsius) and nighttime lows are 81 °F (27 °C).

18 days 90 °F max. or more (32 °C)
0 days 70 °F min. or less (21 °C)

Typically every July day at Key West has a temperature of at least 80 °F (27 °C). Temperatures above 100 °F (38 °C) are not expected here this month.

Rainy Weather iconRain

3.6 in total precipitation 92 mm
12 days of rain

Half the time, Key West receives 1.9 to 5.7 inches (49 to 146 mm) of rainfall in July. One in four years has drier weather, while another one in four is wetter.

Sunny Weather iconSun

77 % sunshine
3 days clear skies

The sun's rays reach the ground in Key West during 77 percent of daylight hours on average in July, for a total of 322 hours in the month. Typically on 3 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in July at Key West lasts for 13 hours and 28 minutes a day on average. The longest day of the month is the 1st with 13 hours and 38 minutes of daylight. By the end of the month, the days have shortened to 13:16 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

72 % July average humidity

The relative humidity in Key West during July usually peaks at 78 percent in the morning then drops to 66 percent by early afternoon.

Local Time1 am4 am7 am10 am1 pm4 pm7 pm10 pm
Humidity % 76 78 77 69 66 66 71 75

Windy Weather iconWind

9.4 mph July wind speed average 15.1 kph

July is less windy than most other months in Key West.

Stormy Weather iconStorms

2 days rainfall of 0.5 inches (13 mm) or more
13 days with thunderstorms in July
2 % chance a named storm approaches

There's a 2 percent probability that a named tropical storm will approach within 100 miles (165 km) of Key West during July. It's unlikely that any storm in the area will be as severe as a hurricane.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals. The named storm probabilities come from the Atlantic Oceanographic and Meteorological Laboratory, Hurricane Research Division.

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