Health effects can be immediately felt by sensitive groups. Healthy individuals may experience difficulty breathing and throat irritation with prolonged exposure. Limit outdoor activity.

Health & Activity Advice

⚠ Limit Outdoor Time

UV index is 8 today — high. Apply sunscreen before heading out, and consider a hat or shade during peak hours (roughly late morning to mid-afternoon).

Health effects can be immediately felt by sensitive groups. Healthy individuals may experience difficulty breathing and throat irritation with prolonged exposure. Limit outdoor activity.

Morning before 10 AM or evening after 4 PM is the more comfortable window for outdoor activity today.

Nearby Regional Outlook

Johannesburg Weather Radar

Live precipitation · Cloud cover · Wind

View live radar →

Frequently Asked Questions

What is the hottest month in Johannesburg?

The hottest month in Johannesburg is typically January, with daytime highs averaging around 25.7°C (78°F), based on 10 years of historical weather data. Overnight lows during this period average near 14.7°C (58°F).

What is the coldest month in Johannesburg?

The coldest month in Johannesburg is typically July, with overnight lows averaging around 3.8°C (39°F) and daytime highs near 17.2°C (63°F), based on 10 years of historical weather data.

Does Johannesburg have a rainy season?

Johannesburg doesn't have a sharply defined rainy season rainfall is fairly spread across the year based on 10 years of historical data. January is the wettest month on average (about 120 mm), while July is the driest (about 4 mm).

What's the best time of year to visit Johannesburg?

The best time to visit Johannesburg is typically August to September, when daytime highs average a comfortable 22.8°C (73°F). Rainfall during this window averages around 8 mm, one of the lighter, more comfortable stretches of the year. This is based on 10 years of historical weather data.

Is Johannesburg's air quality safe right now?

As of the latest reading, Johannesburg's air quality index (AQI) is 66, rated "Moderate", based on the nearest monitoring station. Air quality is acceptable, though unusually sensitive individuals may notice minor effects.

Atmospheric Details

Wind

6 km/h

SSW · Light Breeze · Max 8 km/h

Humidity

74 %

High · feels muggy

UV Index

Very High

Visibility

16 km

Excellent

Pressure

834 hPa

Low · change likely

Dew Point

7°C

Comfortable

Today vs Normal

21°C-5° below normal

The long-term average high for today is 26°C.

Air Quality

Unhealthy

Health effects can be immediately felt by sensitive groups. Healthy individuals may experience difficulty breathing and throat irritation with prolonged exposure. Limit outdoor activity.

Health & Activity Advice

⚠ Limit Outdoor Time

UV index is 8 today — high. Apply sunscreen before heading out, and consider a hat or shade during peak hours (roughly late morning to mid-afternoon).

Health effects can be immediately felt by sensitive groups. Healthy individuals may experience difficulty breathing and throat irritation with prolonged exposure. Limit outdoor activity.

Morning before 10 AM or evening after 4 PM is the more comfortable window for outdoor activity today.