August 31 is statistically one of the best days of the year in Johannesburg. With minimal rain risk (3%) and pleasant highs of 22°C, it's ideal for outdoor adventures. Johannesburg is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
View the full calendar
Essential Travel Info for Johannesburg
Currency
ZAR
R South African rand
Language
Afrikaans
+10 more
Driving
Left side
Connect
Always-On[dead link], +27 11 575-2505, p...
Safety
Moderate Safety
GPI: 2.283
Johannesburg Weather Forecast for August 31
"Mild & Comfortable. Expect average highs of 22.1°C. 3% chance of rain."
What to Wear in Johannesburg in August
Based on historical data for August 31, Johannesburg typically experiences temperatures between 7.4°C and 22.1°C. We recommend packing light jacket, long pants, layers (onion system) to stay comfortable. Trends suggest it will stay mostly dry (3% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Johannesburg
Smart Suitcase
- Light Jacket
- Long Pants
- Layers (Onion System)
Average High
22.1°C
Daytime Peak
Average Low
7.4°C
Nighttime Low
Feels Like
22.1°C
☀️ Feels accurate
Rain Chance
3%
Avg 0mm if it rains
Cloud Cover
14%
Clear sky
Pressure
1020.9 hPa
Medium volatility
Johannesburg Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 94% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 28 min to burn
Type III-IV
🟡 42 min to burn
Type V-VI
🟢 70 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
7.1°C
Dry air
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in South Africa
Flight Traffic
High
99/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~297
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Johannesburg
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:23
☀️ Noon
12:09
🌇 Sunset
17:56
⏱️ Daylight
11h 32m
Wind Speed
17.7 km/h
Gentle breeze
Sunshine
10.3 hrs
Direct Sun (Cloud-free)
Humidity
38%
Comfortable
Travel Intelligence
Exclusive flight analytics & health data for Johannesburg
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Johannesburg
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
High pressure may reduce activity.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Moderate seismic activity. Occasional tremors possible.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Johannesburg on August 31 averages 22.1°C with a 3% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Johannesburg Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (August 31) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Johannesburg Worth Visiting on August 31?
Planning a trip to Johannesburg on August 31? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 22.1°C with a 3% historical precipitation risk.
✈️ Travel Logistics: Approximately 297 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 9 vaccinations are recommended for South Africa, including COVID-19.
📊 Historical Extremes: The hottest August 31 recorded in the last 30 years saw temperatures hit 27.1°C in 2025, while the coldest dropped to 2.5°C in 2020.