In August, in Key West, Florida, the average high-temperature is 85.3°F (29.6°C), and the average low-temperature is 82.9°F (28.3°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 95°F (35°C).
From August 1st to 18th the daily high averages 91 degrees Fahrenheit (33 degrees Celsius) and nighttime lows are 81 °F (27 °C). Typically every August 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. Rain
Get the monthly weather forecast for Key West, FL, including daily high/low, historical averages, to help you plan ahead.
Sun & Moon. Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 87 °F. Passing clouds. (Weather station: Key West International Airport, USA). See more current weather.
Sep 17, 2020 · Florida Weather in August Regardless of what part of Florida that you're visiting, August temperatures are hot and humid, and the entire state can feel like one big sauna. Avoid the most intense midday heat between noon and 4 p.m. by staying inside or under a shaded area near the beach or a pool.