December in St. Petersburg averages a daily high of 22.3°C with nights around 15.2°C. Expect roughly 5.9 wet days totalling 57.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit St. Petersburg is November–April.
Based on ST PETERSBURG ALBERT WHITTED AIRPORT, FL US (5.3km), 1995–2024. 27 years of December data.