May in St. Petersburg averages a daily high of 30.2°C with nights around 22.9°C. Expect roughly 5.6 wet days totalling 64.6mm. 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. 24 years of May data.