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🇿🇦 Johannesburg

Name: Johannesburg, South Africa
Address: ZA

South Africa — City Resilience Report

High Resilience

Climate Stability needs attention (50/100) Strong Connectivity (100/100)

Overview

Population: 9.42M
Elevation: —
Timezone: Africa/Johannesburg
Coordinates: -26.2023, 28.0436
Country: 🇿🇦 South Africa
Nearest Major City: Soweto (22 km)

Score Breakdown

Climate Stability Low annual temperature range = more stable

50

Water Security Based on heat + elevation proxy — not infrastructure

80

Daylight Stability Low seasonal daylight variation = more stable

77

Connectivity More cities and population nearby = better connected

100

Exposure & Terrain Moderate elevation, stable terrain = lower risk

60

Climate Profile

Summer

High —

Low —

Winter

High 16.7°C

Low 3.4°C

Condition Drizzle

Daylight Analysis

Longest Day (Summer Solstice) 13.8h

Sunrise: 05:12 Sunset: 18:59

Shortest Day (Winter Solstice) 10.5h

Sunrise: 06:54 Sunset: 17:24

Daylight Variation: 3.3h between solstices

Connectivity

Within 50 km

25

cities

Within 100 km

48

cities

Within 200 km

92

cities

Population within 50 km: 7.66M
Population within 100 km: 12.8M
Isolation Index: Very Connected

Exposure & Terrain

Elevation: —
Relative Elevation: —
Nearby Avg Elevation: —
Terrain Context: Unknown

Prayer Rhythm

Summer Fasting Hours

15.3h

Fajr to Maghrib (longest day)

Winter Fasting Hours

11.9h

Fajr to Maghrib (shortest day)

Fasting Range

3.4h

Difference between seasons

Resilience Map

Map loading...

50 km 100 km 200 km

Methodology

Data Confidence: Low (4/7 signals available)

Limited data available. Treat scores as rough estimates.

Data Sources

Geographic and population data from GeoNames. Climate data from Open-Meteo historical archive (2023). Daylight and prayer times computed with SunCalc algorithms. All calculations are deterministic and reproducible.

What These Scores Measure

Scores are based on geographic and climate signals only — temperature, elevation, daylight patterns, and nearby city density. They do not account for water infrastructure, governance, economic development, or disaster preparedness. A high score means favorable natural conditions, not necessarily strong resilience in practice.

Score Formula

The overall resilience score is a weighted average of five sub-scores: Climate Stability (25%), Connectivity (25%), Exposure & Terrain (20%), Water Security (15%), and Daylight Stability (15%). Each sub-score ranges from 0 to 100.

Score Bands

High (70+) Moderate (40-69) Low (<40)

Disclaimer: This is a resilience proxy based on publicly available geographic and climatic data, not a full engineering assessment. It is intended for informational purposes only. Source attribution: GeoNames, Open-Meteo, SunCalc.