February in Florissant averages a daily high of 7.7°C with nights around -2.4°C. Expect roughly 8.8 wet days totalling 57.1mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Florissant is September–October.
Based on ST LOUIS LAMBERT INTERNATIONAL AIRPORT, MO US (6km), 1995–2024. 30 years of February data.