October weather forecast
Key West, FL

October brings a refreshing change to the monotonous hot and humid regimen in Key West. This month is a transition period from the scorching summer to cooler autumn temperatures. Albeit marginally, the arrival of October sees a drop in both temperatures and rainfall. Known as the beginning of the "dry season", the fresher cleaner air provides a breath of freshness to the city. The month marks a notable escalation in wind speed, reaching a high of 13.7mph (22km/h), providing a noticeable contrast to the prior calm conditions.

Temperature

With the onset of October, the average high-temperature in Key West stands at a still moderately hot 82°F (27.8°C), closely aligned with September's 84.4°F (29.1°C). Nighttime temperature in Key West sees a small decrement from daytime highs, dipping to an average of 79.7°F (26.5°C) during October.

Heat index

October's heat index is computed to be a tropical 87.8°F (31°C). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', ties air temperature with relative humidity to produce the perceived temperature sensation. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.

Humidity

The average relative humidity in October is 75%.

Rainfall

In Key West, in October, it is raining for 20.1 days, with typically 4.21" (107mm) of accumulated precipitation. In Key West, during the entire year, the rain falls for 199.2 days and collects up to 31.61" (803mm) of precipitation.

Ocean temperature

In Key West, the average seawater temperature in October is 82.9°F (28.3°C).
Note: Swimming, diving, and other water activities in temperatures ranging from 77°F (25°C) to 84.2°F (29°C) are highly enjoyable and provide prolonged comfort without unease.

Daylight

The average length of the day in October is 11h and 34min.
On the first day of the month, sunrise is at 7:19 am and sunset at 7:13 pm. On the last day of October, sunrise is at 7:33 am and sunset at 6:47 pm EDT.

Sunshine

The average sunshine in October is 7.4h.

UV index

April through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: During October, 7 as the daily maximum UV index converts into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.