December Weather in Casselberry, FL
Typical weather conditions during December
Temperature
Average Temperature
63°F
Average High
72°F
Average Low
56°F
Precipitation & Humidity
Average Monthly Precipitation
2.35 inches
Rainy Days
13.4 days
Average Humidity
69%
Data Information
Data Years: 2020 - 2024
Last Updated: September 10, 2025