July weather forecast
Key Largo, FL

July is typically the warmest month in Key Largo, with temperatures soaring above those seen in June. With the significant increase in heat, the frequency and intensity of rain also heighten, providing occasional relief from the scorching sun. However, the majority of days are sun-drenched, making the beach an appealing destination. Sea temperatures reach their annual peak, providing an ideal environment for aquatic life and activities. Notably, July features the highest temperature of the year at 84.7°F (29.3°C) and witnesses a high rainfall of 3.7" (94mm).

Temperature

July's onset records a minor alteration in the average high-temperature to a still warm 84.7°F (29.3°C) from June's 83.7°F (28.7°C). Key Largo experiences a minimal drop from daytime high temperatures, recording an average low-temperature of 82.4°F (28°C) throughout July.

Heat index

For most parts of July, the heat index is estimated at a hot 93.2°F (34°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly important for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.

Humidity

The average relative humidity in July is 74%.

Rainfall

In July, the rain falls for 20.9 days. Throughout July, 3.7" (94mm) of precipitation is accumulated. Throughout the year, there are 190.1 rainfall days, and 27.05" (687mm) of precipitation is accumulated.

Ocean temperature

In July, the average ocean temperature is 85.6°F (29.8°C).
Note: For activities such as swimming and diving, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as particularly pleasant and satisfying for prolonged periods without feeling uneasy.

Daylight

The average length of the day in July is 13h and 31min.
On the first day of the month, sunrise is at 6:35 am and sunset at 8:15 pm. On the last day of July, sunrise is at 6:49 am and sunset at 8:07 pm EDT.

Sunshine

July has the most sunshine of the year, 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. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 7 in July translates into these instructions:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Notice! The Sun's UV exposure elevates with sand and water reflections.