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Florissant city, MO

ZIP 63033 — Climate & Environment

Source: U.S. Census Bureau ACS 2019–2023 5-Year Estimates. Page data updated 2026-08-02.

Middle ClassLow Snow Area

Climate, disaster risk, air quality, and environmental safety

Environment & Risk in ZIP Code 63033

Disaster Risk (FEMA NRI)

County-linked natural hazard risk from FEMA National Risk Index — useful for comparing insurance and disaster exposure.

FEMA’s National Risk Index rates natural-hazard risk for Florissant city, MO as Relatively High (composite score 98.7), which is among the highest nationally. The strongest component scores on US5 are flood (97.0) and hurricane (32.1). These scores are county-linked NRI values published for planning context — all ZIP codes in the same county share the same composite score on US5. Useful when comparing insurance and disaster exposure across areas, not a substitute for a parcel-level flood or fire determination.

Overall rating
Relatively High
Risk index
98.7
Flood risk
97.0
Wildfire risk
3.0
Hurricane risk
32.1
Earthquake risk
98.5
Tornado risk
98.9
Winter weather risk
79.7
Hail risk
87.1

Climate & Weather in ZIP Code 63033

Climate normals for Florissant city, MO show little to no average snow and around 41.7 inches of annual precipitation. Pair that with FEMA NRI hazard context (overall rating Relatively High) when evaluating long-term housing and insurance exposure.

7-day weather forecast

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Sunrise, sunset & moon

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Monthly Temperature

30-year climate normals (avg. monthly temperature)

Climate Data
Hardiness Zone
7a
Annual Snow Days
0
Annual Precipitation
41.7 in
FEMA NRI rating
Relatively High

Climate & Environment key statistics

Climate statistics
Climate
Hardiness zone7a
Annual precip (in)41.7
Snow days0
Broadband access92.2%
Risk & Air Quality statistics
Risk & Air Quality
NRI ratingRelatively High
NRI risk index98.7
Flood risk (NRI)97.0
Wildfire risk (NRI)3.0
Hurricane risk (NRI)32.1
IRS net migration1910