The highest day temperature in September 2025 was 97°F. The lowest night temperature was 73°F. The average values for day and night temperatures during September were 91.1°F и 77.0°F respectivly.

The average sea surface temperature in September 2025 for Kissimmee was 30.0°F. The maximum and minimum values were 30.0°F and 30.0°F respectively.

Most of the days in September are cloudy but you can also expect sunny or gloomy days.

Precipitation total in September for Kissimmee is 2.4 in. It makes september the most rainy month of the year.

The average wind speed in September is 6.6 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Kissimmee in September is 6.1 hours.