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Big Sky CDP, MT

ZIP 59730 — Climate & Environment

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

Middle ClassLow Snow AreaRemote Work Hub

Climate, disaster risk, air quality, and environmental safety

Environment & Risk in ZIP Code 59730

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 Big Sky CDP, MT as Relatively Moderate (composite score 81.0), which is elevated versus much of the country. The strongest component scores on US5 are wildfire (91.4) and flood (64.2). 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
81.0
Flood risk
64.2
Wildfire risk
91.4
Earthquake risk
94.2
Tornado risk
16.7
Winter weather risk
99.6
Hail risk
84.5
Air Quality (EPA AQI)

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

14
Median AQI
99.1%
Good Days

Air quality healthy to breathe

0.0%
Unhealthy / Hazardous

Sensitive groups or worse

Climate & Weather in ZIP Code 59730

Climate normals for Big Sky CDP, MT show little to no average snow and around 23.3 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
5a
Annual Snow Days
0
Annual Precipitation
23.31 in
FEMA NRI rating
Relatively Moderate

Climate & Environment key statistics

Climate statistics
Climate
Hardiness zone5a
Annual precip (in)23.31
Snow days0
Broadband access90.8%
Risk & Air Quality statistics
Risk & Air Quality
NRI ratingRelatively Moderate
NRI risk index81.0
Flood risk (NRI)64.2
Wildfire risk (NRI)91.4
IRS net migration125
Median AQI14
Good AQI days99.1%