Casselberry Weather Forecast
- 76
- 92
Thunderstorms Likely
- 76
- 92
Thunderstorms Likely
- 76
- 90
Chance Thunderstorms
- 74
- 88
Mostly Sunny
- 73
- 88
Chance Thunderstorms
- 74
- 89
Thunderstorms Likely
- 74
- 89
Rain Showers Likely
Today 13 Sep Seminole
Partly sunny in the afternoon then considerable cloudiness. A chance of Showers and Thunderstorms. Highs in the lower 90s. Northwest Winds around 5 Mph becoming southeast late in the afternoon and towards Sunset. Chance of rain 50 percent. Heat index Values up to 104.
Tonight 13 Sep Seminole
Considerable cloudiness then becoming partly cloudy in the late evening and early morning then becoming mostly clear. A chance of Showers and Thunderstorms early in the evening. Lows in the mid 70s. Southeast Winds around 5 Mph becoming west late. Chance of rain 50 percent.
Casselberry Temperature Statistics
September Temperature
Orlando / Sanford Airport (8.1 miles)
Lowest 7 September, 2026
75.7 °FAverage September
83.7 °FHighest 4 September, 2026
94.6 °F
Climate (2021–2026)
Orlando / Sanford Airport (8.1 miles)
Average Low 2021–2026
65.1 °FAverage 2021–2026
74.2 °FAverage High 2021–2026
84.1 °F