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Johnston city, IA

ZIP 50131 — Climate & Environment

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

Upper Middle ClassLow Snow Area

Climate, disaster risk, air quality, and environmental safety

Environment & Risk in ZIP Code 50131

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 Johnston city, IA as Relatively Moderate (composite score 92.0), which is among the highest nationally. The strongest component scores on US5 are flood (92.1) and wildfire (57.7). 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 Moderate
Risk index
92.0
Flood risk
92.1
Wildfire risk
57.7
Hurricane risk
27.5
Earthquake risk
66.8
Tornado risk
98.1
Winter weather risk
90.3
Hail risk
97.9
Air Quality (EPA AQI)

County-level annual air quality from EPA. Good days = healthy to breathe; unhealthy = sensitive groups or worse.

46
Median AQI
58.5%
Good Days

Air quality healthy to breathe

0.7%
Unhealthy / Hazardous

Sensitive groups or worse

Climate & Weather in ZIP Code 50131

Climate normals for Johnston city, IA show little to no average snow and around 36.2 inches of annual precipitation. Pair that with FEMA NRI hazard context (overall rating Relatively Moderate) 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
5b
Annual Snow Days
0
Annual Precipitation
36.16 in
FEMA NRI rating
Relatively Moderate

Climate & Environment key statistics

Climate statistics
Climate
Hardiness zone5b
Annual precip (in)36.16
Snow days0
Broadband access93.6%
Risk & Air Quality statistics
Risk & Air Quality
NRI ratingRelatively Moderate
NRI risk index92.0
Flood risk (NRI)92.1
Wildfire risk (NRI)57.7
Hurricane risk (NRI)27.5
IRS net migration1399
Median AQI46
Good AQI days58.5%