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La Crescenta-Montrose CDP, CA

ZIP 91020 — 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 91020

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 La Crescenta-Montrose CDP, CA as Very High (composite score 100.0), which is among the highest nationally. The strongest component scores on US5 are flood (100.0) and wildfire (99.9). 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
100.0
Flood risk
100.0
Wildfire risk
99.9
Hurricane risk
0.0
Earthquake risk
100.0
Tornado risk
97.7
Winter weather risk
74.8
Hail risk
93.0
Air Quality (EPA AQI)

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

77
Median AQI
10.9%
Good Days

Air quality healthy to breathe

32.5%
Unhealthy / Hazardous

Sensitive groups or worse

Climate & Weather in ZIP Code 91020

Climate normals for La Crescenta-Montrose CDP, CA show little to no average snow and around 20.1 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
10a
Annual Snow Days
0
Annual Precipitation
20.08 in
FEMA NRI rating
Very High

Climate & Environment key statistics

Climate statistics
Climate
Hardiness zone10a
Annual precip (in)20.08
Snow days0
Broadband access90.9%
Risk & Air Quality statistics
Risk & Air Quality
NRI ratingVery High
NRI risk index100.0
Flood risk (NRI)100.0
Wildfire risk (NRI)99.9
Hurricane risk (NRI)0.0
IRS net migration358
Median AQI77
Good AQI days10.9%