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Bryn Mawr-Skyway CDP, WA

ZIP 98178 — 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 98178

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 Bryn Mawr-Skyway CDP, WA as Very High (composite score 99.7), which is among the highest nationally. The strongest component scores on US5 are flood (99.5) and wildfire (79.5). 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
Very High
Risk index
99.7
Flood risk
99.5
Wildfire risk
79.5
Earthquake risk
99.9
Tornado risk
73.2
Winter weather risk
94.7
Hail risk
3.2
Air Quality (EPA AQI)

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

43
Median AQI
67.5%
Good Days

Air quality healthy to breathe

0.0%
Unhealthy / Hazardous

Sensitive groups or worse

Climate & Weather in ZIP Code 98178

Climate normals for Bryn Mawr-Skyway CDP, WA show little to no average snow and around 34.7 inches of annual precipitation. Pair that with FEMA NRI hazard context (overall rating Very 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
9a
Annual Snow Days
0
Annual Precipitation
34.69 in
FEMA NRI rating
Very High

Climate & Environment key statistics

Climate statistics
Climate
Hardiness zone9a
Annual precip (in)34.69
Snow days0
Broadband access91.7%
Risk & Air Quality statistics
Risk & Air Quality
NRI ratingVery High
NRI risk index99.7
Flood risk (NRI)99.5
Wildfire risk (NRI)79.5
IRS net migration1393
Median AQI43
Good AQI days67.5%