December weather in Casselberry, FL
The average temperature in Casselberry in December is 63.8°F (54.5°F–73.1°F). Average precipitation: 2.28 inches.
December is a winter month in Casselberry, and is cooler than the annual average of 73.8°F. Daily temperatures swing about 18.6°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 10h 11m. For travel, December is one of the best months of the year to visit.
Avg High
73.1°F
Avg Low
54.5°F
Precipitation
2.28 in
Daylight
10h 11m
December records in Casselberry
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 88.0°F (1919) | 32.0°F (1932) | 4.25 in (1925) |
| December 2 | 87.1°F (1927) | 30.0°F (1910) | 0.91 in (1931) |
| December 3 | 88.0°F (1928) | 28.9°F (1910) | 1.74 in (1950) |
| December 4 | 88.0°F (1934) | 30.9°F (1903) | 1.85 in (2009) |
| December 5 | 91.0°F (1928) | 33.1°F (1907) | 0.98 in (1921) |
| December 6 | 88.0°F (1928) | 35.1°F (1898) | 0.71 in (2025) |
| December 7 | 86.0°F (1971) | 25.0°F (1937) | 2.36 in (2025) |
| December 8 | 87.1°F (1929) | 25.0°F (1937) | 1.08 in (1905) |
| December 9 | 86.0°F (1919) | 28.9°F (1934) | 2.75 in (1969) |
| December 10 | 88.0°F (1918) | 28.0°F (1917) | 1.63 in (1921) |
| December 11 | 90.0°F (1919) | 28.0°F (1898) | 1.83 in (1967) |
| December 12 | 90.0°F (1923) | 21.9°F (1934) | 1.61 in (2002) |
| December 13 | 87.1°F (1948) | 19.9°F (1962) | 1.39 in (2002) |
| December 14 | 86.0°F (1919) | 28.0°F (1962) | 1.95 in (1914) |
| December 15 | 86.0°F (1919) | 30.0°F (1944) | 1.26 in (1918) |
| December 16 | 86.0°F (1971) | 28.9°F (1968) | 3.52 in (2023) |
| December 17 | 87.1°F (1922) | 30.9°F (1916) | 1.61 in (1950) |
| December 18 | 90.0°F (1961) | 32.0°F (1901) | 1.05 in (1999) |
| December 19 | 88.0°F (1922) | 30.9°F (1901) | 1.11 in (1965) |
| December 20 | 86.0°F (1924) | 27.0°F (2000) | 3.65 in (2018) |
| December 21 | 86.0°F (2013) | 25.0°F (1901) | 1.88 in (1935) |
| December 22 | 84.9°F (2013) | 28.9°F (1935) | 1.70 in (1930) |
| December 23 | 84.9°F (2013) | 32.0°F (1903) | 1.88 in (1935) |
| December 24 | 84.0°F (1911) | 26.1°F (1906) | 1.03 in (1920) |
| December 25 | 86.0°F (2015) | 25.0°F (1906) | 3.53 in (1949) |
| December 26 | 86.0°F (2015) | 28.9°F (1906) | 2.10 in (1957) |
| December 27 | 86.0°F (1921) | 24.1°F (1935) | 0.93 in (1951) |
| December 28 | 86.0°F (2015) | 18.0°F (1894) | 2.87 in (1905) |
| December 29 | 86.0°F (2015) | 25.0°F (1894) | 0.77 in (1942) |
| December 30 | 86.0°F (2015) | 25.0°F (1909) | 0.72 in (1914) |
| December 31 | 84.9°F (1924) | 21.0°F (1909) | 2.78 in (2002) |