County Data
San Bernardino County, California
Self-reliance and preparedness data for San Bernardino County
Very High
Hazard Risk (54.4/100)
9b
USDA Zone
276
Frost-Free Days
Excellent
Solar (5.9 kWh/m²/day)
Natural Hazard Risks in San Bernardino County
| Hazard | Risk Rating | Score |
|---|---|---|
| Wildfire | Very High | 74.9 |
| Earthquake | Relatively High | 50.9 |
| Riverine Flooding | Relatively High | 36.7 |
| Lightning | Relatively Moderate | 17.0 |
| Landslide | Relatively Moderate | 16.7 |
Source: FEMA National Risk Index. Scores 0–100, higher = more risk.
Wildfire Risk in San Bernardino County
FEMA National Risk Index74.9/100 — Well above the national average. Ranked 4 of 562 US counties where wildfire is a leading hazard.
What that means for San Bernardino County households
- ●Clear a 30ft defensible space around structures, especially on the downslope side
- ●Identify two evacuation routes and check which roads flood or close seasonally
- ●Keep go-bags accessible through fire season
- ●Stock N95 masks — smoke reaches far beyond the burn perimeter
- ●Check whether your policy covers wildfire and at what deductible
Full wildfire preparedness guide · See how California compares
Climate Profile
Temperature & Growing Season
| January Avg | 50°F |
| July Avg | 91°F |
| USDA Zone | 9b |
| Frost-Free Days | 276 |
Water & Energy
| Annual Precipitation | 4.3″ |
| Solar Potential | 5.9 kWh/m²/day |
| Wind Speed | 2.6 m/s |
| Soil Type | Loam |
Local Species
54
Edible species
23
Medicinal species
66
Autonomy Score
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Frequently Asked Questions
- What are the biggest natural hazards in San Bernardino County, California?
- San Bernardino County has an overall hazard rating of Very High based on FEMA National Risk Index data. The top threats are Wildfire, Earthquake, Riverine Flooding. Each hazard is scored 0–100 by likelihood and expected impact.
- What is the growing season in San Bernardino County?
- San Bernardino County is in USDA Hardiness Zone 9b with approximately 276 frost-free days per year. This determines which crops, fruit trees, and perennials can survive your winters and how long your outdoor growing season lasts.
- Is San Bernardino County good for solar power?
- San Bernardino County has a excellent solar rating. Solar potential is based on average daily irradiance (kWh/m²/day), which determines how much energy rooftop or ground-mounted panels can produce year-round.
- How many edible plants grow in San Bernardino County?
- Our database identifies 54 edible plant species in San Bernardino County based on regional flora data, USDA hardiness zone, and iNaturalist observations. The full field guide includes identification notes, preparation methods, and seasonal availability.
- What is the autonomy score for San Bernardino County?
- San Bernardino County has an autonomy score of 66. This composite score measures local self-reliance potential across water access, food production capacity, energy resources, and supply chain resilience. Higher scores indicate greater potential for self-sufficiency.