County Data
Johnson County, Illinois
Self-reliance and preparedness data for Johnson County
Very Low
Hazard Risk (6.1/100)
Moderate
Solar (4.2 kWh/m²/day)
Natural Hazard Risks in Johnson County
| Hazard | Risk Rating | Score |
|---|---|---|
| Winter Weather | Relatively Low | 12.4 |
| Tornado | Relatively Low | 10.6 |
| Landslide | Relatively Low | 10.3 |
| Strong Wind | Relatively Low | 9.8 |
| Lightning | Very Low | 7.5 |
Source: FEMA National Risk Index. Scores 0–100, higher = more risk.
Climate Profile
Temperature & Growing Season
| January Avg | 27°F |
Water & Energy
| Annual Precipitation | 4.8″ |
| Solar Potential | 4.2 kWh/m²/day |
| Wind Speed | 1.9 m/s |
| Soil Type | Silt Loam |
Local Species
60
Edible species
25
Medicinal species
51
Autonomy Score
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Frequently Asked Questions
- What are the biggest natural hazards in Johnson County, Illinois?
- Johnson County has an overall hazard rating of Very Low based on FEMA National Risk Index data. The top threats are Winter Weather, Tornado, Landslide. Each hazard is scored 0–100 by likelihood and expected impact.
- Is Johnson County good for solar power?
- Johnson County has a moderate 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 Johnson County?
- Our database identifies 60 edible plant species in Johnson 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 Johnson County?
- Johnson County has an autonomy score of 51. 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.