In the 1760s, French settlers arrived in the area which they declared it as "un val fleurissant," or "flowering valley." But it was the Spanish who set up the first civil government and laid out the grid of streets now known as Old Town in 1786. The Spanish called it San Fernando, which was anglicized to St. Ferdinand. The locals called it Florissant and Valley of the Flowers, and the name was eventually changed in 1939 to Florissant.
Florissant is a city in St. Louis County, Missouri, United States covering an area of 30.3 km² (11.7 mi²). The average winter temperature is 29.4 degrees F while the average summer temperature is 80.1 degrees F.

Elevation: 578 feet

Land area: 11.4 square miles

Latitude: 38.80 N

Longitude: 90.33 W

Population: 51,812 as on 2005

Local festivals include:

• Valley of Flowers Festival - May 4-6, 2007

Attractions:

• Museum of Western Jesuit Missions