23 Â°C. In most years, Orlando averages a daily maximum temperature for August that's between 90 and 93 degrees Fahrenheit (32 to 34 degrees Celsius). The minimum temperature usually falls between 73 and 75 Â°F (23 to 24 Â°C).Orlando's temperatures reach their annual peak on August 5th.he sun's rays reach the ground in Orlando during 61 percent of daylight hours on average in August, for a total of 248 hours in the month. Typically on 3 days this month the sky is mainly clear, with at most 30 percent cloud cover.