May 17 is statistically one of the best days of the year in Johannesburg. With minimal rain risk (4%) and pleasant highs of 19°C, it's ideal for outdoor adventures. Expect a bustling atmosphere in Johannesburg right now—this is when the city truly comes alive with visitors.
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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 May 17
"Mild & Comfortable. Expect average highs of 18.8°C. 4% chance of rain."
What to Wear in Johannesburg in May
Based on historical data for May 17, Johannesburg typically experiences temperatures between 6.8°C and 18.8°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (4% 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
Average High
18.8°C
Daytime Peak
Average Low
6.8°C
Nighttime Low
Feels Like
18.8°C
🌤️ Feels accurate
Rain Chance
4%
Avg 0.2mm if it rains
Cloud Cover
26%
Clear sky
Pressure
1022.2 hPa
Low volatility
Johannesburg Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 98% 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
🔴 114 min to burn
Type III-IV
🟡 171 min to burn
Type V-VI
🟢 285 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
10.6°C
Pleasant
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
100/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~300
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Johannesburg
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:41
☀️ Noon
12:05
🌇 Sunset
17:29
⏱️ Daylight
10h 48m
Wind Speed
13.5 km/h
Gentle breeze
Sunshine
9.5 hrs
Direct Sun (Cloud-free)
Humidity
59%
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
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
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 May 17 averages 18.8°C with a 4% precipitation probability. Wedding/Outdoor Event Score: 98/100."
— 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
Better Alternatives Nearby
Consider these dates within ±7 days
May 10
19.5°C • 4% rain
Score
100
May 11
19.6°C • 2% rain
Score
100
May 12
19.6°C • 5% rain
Score
100
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 17) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Johannesburg Worth Visiting on May 17?
Planning a trip to Johannesburg on May 17? 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 18.8°C with a 4% historical precipitation risk.
✈️ Travel Logistics: Approximately 300 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 May 17 recorded in the last 30 years saw temperatures hit 24.2°C in 2024, while the coldest dropped to 5.2°C in 2018.