December Weather
Climate patterns and historical data for Casselberry
Average Temperature
64°F
Typical conditions for December in Casselberry
72°F
Avg High
58°F
Avg Low
Cold
Mild
Warm
Hot
Precipitation
2.36 inches
monthly average
11.6 days with rain
Humidity
71%
average humidity
Dry
Comfortable
Humid
What to Expect
- Temperatures range from 58°F to 72°F
- Frequent rain showers—pack an umbrella
- Light layers recommended
Climate Data Source
Based on 2021 - 2025
historical data
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Last updated
January 2026