July weather forecast
Key West, FL

July weather in Key West exhibits hotter temperatures and higher humidity. However, the sea provides a constant, cooling breeze which moderates the heat. The sunny days and humid evenings become the routine daily weather pattern for July. Alongside this, Key West delights in the increased sea temperature that makes marine activities a delight. Significantly, July holds the lowest relative humidity of 74%, while still preserving the town's tropical climate attributes.

Temperature

Key West's average high-temperature in July sits at a still warm 84.7°F (29.3°C), showing little difference from the previous month. July's average low-temperature is a still moderately hot 82.8°F (28.2°C), reflecting a minor difference from the day's peak temperatures.

Heat index

July's mean heat index is appraised at a tropical 93.2°F (34°C). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.

Humidity

July through September, with an average relative humidity of 74%, are the least humid months.

Rainfall

In Key West, in July, it is raining for 20.7 days, with typically 3.66" (93mm) of accumulated precipitation. Throughout the year, there are 199.2 rainfall days, and 31.61" (803mm) of precipitation is accumulated.

Ocean temperature

In Key West, in July, the average water temperature is 85.5°F (29.7°C).
Note: Surface water temperatures falling between 77°F (25°C) and 84.2°F (29°C) are regarded as prime and extremely agreeable for enduring periods during any water activity.

Daylight

The average length of the day in July in Key West, Florida, is 13h and 29min.
On the first day of the month, sunrise is at 6:42 am and sunset at 8:20 pm. On the last day of July, in Key West, sunrise is at 6:55 am and sunset at 8:11 pm EDT.

Sunshine

The month with the most sunshine is July, with an average of 11h of sunshine.

UV index

April through October, with an average maximum UV index of 7, are months with the highest UV index in Key West. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In July, the UV index of 7 transforms into the following advice:
Fend off overexposure. Sun protection is vital. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Take caution! The UV rays from the Sun gain strength from sand and water reflections.