Avg High
Johannesburg South in August
Avg Low
Rain
Daylight
11h
What to expect
August in Johannesburg South is late winter, with a settled seasonal pattern already in place. The month is mostly mild for steady exploring, with a marked step-down after sunset. The daylight window is balanced for full days without endless late evenings. Most days feel close to what the averages suggest, with straightforward pacing.
August in context
How it compares to the rest of the year in Johannesburg South.
Hottest (avg)
#9 / 12
Wettest (avg)
#10 / 12
Daylight Hours
#9 / 12
Windiest (avg)
#4 / 12
Highest UV
#9 / 12
Most Humid
#11 / 12
Monthly climate breakdown
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight hours
- 11.2 h
- UV index (max)
- 7
- Typical sun hours
- 06:35 - 17:48
Rain & Snow
- Total rain
-
- Rainy days
- 3 days
- Cloud cover (avg)
- 16%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 44%
- Wind (avg)
-
- Wind (max gusts)
-
Daily climate explorer
Day 15 selected for August. Typical high 20.1°C and low 4.8°C.
Typical disruptions in August
Based on 30 years of historical data, these are the disruption patterns most likely to affect plans in August.
Cold High impact
Cold feels-like nights Measures: Cold feels-like nights (min <=5C). Observed about 82% of days (25.5 days/month) in August. Historical risk signal only, not a day-by-day forecast.
25.5 days / month
~82% of days
Why this matters
- Expected days 25.5 days / month
- Probability ~82% of days
- Intensity Up to ~5°C (P95)
Cold feels-like nights are possible on ~25 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Wind High impact
Strong gusts Measures: Strong gust days (>=60 km/h). Observed about 5% of days (1.5 days/month) in August. Historical risk signal only, not a day-by-day forecast.
1.5 days / month
~5% of days
Why this matters
- Expected days 1.5 days / month
- Probability ~5% of days
- Intensity Up to ~79km/h (P95)
Strong gusts are possible on ~1 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Cold Moderate
Freezing nights Measures: Freezing nights (min <=0C). Observed about 5% of days (1.5 days/month) in August. Historical risk signal only, not a day-by-day forecast.
1.5 days / month
~5% of days
Why this matters
- Expected days 1.5 days / month
- Probability ~5% of days
- Intensity Up to ~-0°C (P95)
Freezing nights are possible on ~1 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Show all disruptions (15 more)
Rain High impact
Washout risk Measures: Washout day risk. Observed about 1% of days (0.4 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.4 days / month
~1% of days
Why this matters
- Expected days 0.4 days / month
- Probability ~1% of days
- Intensity Up to ~18mm (P95)
Washout conditions are possible on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain Moderate
Rain disruption Measures: Likely rain disruption days. Observed about 2% of days (0.5 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.5 days / month
~2% of days
Why this matters
- Expected days 0.5 days / month
- Probability ~2% of days
- Intensity Up to ~18mm (P95)
Rain disruption risk appears on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain Moderate
Heavy rain days Measures: Heavy rain days (>=10mm). Observed about 1% of days (0.2 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.2 days / month
~1% of days
Why this matters
- Expected days 0.2 days / month
- Probability ~1% of days
- Intensity Up to ~20mm (P95)
Heavy rain is possible on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cold Minor
Cold nights Measures: Cold nights (min <=5C). Observed about 45% of days (13.9 days/month) in August. Historical risk signal only, not a day-by-day forecast.
13.9 days / month
~45% of days
Why this matters
- Expected days 13.9 days / month
- Probability ~45% of days
- Intensity Up to ~5°C (P95)
Cold nights are possible on ~14 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Wind Minor
Gusty days Measures: Gusty days (>=40 km/h). Observed about 43% of days (13.4 days/month) in August. Historical risk signal only, not a day-by-day forecast.
13.4 days / month
~43% of days
Why this matters
- Expected days 13.4 days / month
- Probability ~43% of days
- Intensity Up to ~68km/h (P95)
Gusty conditions are possible on ~13 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Rain Minor
Wet days Measures: Wet days (>=0.1mm). Observed about 12% of days (3.7 days/month) in August. Historical risk signal only, not a day-by-day forecast.
3.7 days / month
~12% of days
Why this matters
- Expected days 3.7 days / month
- Probability ~12% of days
- Intensity Up to ~10mm (P95)
Measurable rain is possible on ~4 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cloud Minor
Cloudy days Measures: Cloudy days (cloud cover >=60%). Observed about 7% of days (2.3 days/month) in August. Historical risk signal only, not a day-by-day forecast.
2.3 days / month
~7% of days
Why this matters
- Expected days 2.3 days / month
- Probability ~7% of days
- Intensity Up to ~95% (P95)
Cloudy skies are possible on ~2 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain Minor
Rainy hours Measures: Rain-hours signal (>=3h rain). Observed about 7% of days (2.2 days/month) in August. Historical risk signal only, not a day-by-day forecast.
2.2 days / month
~7% of days
Why this matters
- Expected days 2.2 days / month
- Probability ~7% of days
- Intensity Up to ~16h (P95)
Several rainy hours are possible on ~2 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain Minor
Wet most of day Measures: Wet-most-of-day signal (>=6h rain). Observed about 3% of days (1.1 days/month) in August. Historical risk signal only, not a day-by-day forecast.
1.1 days / month
~3% of days
Why this matters
- Expected days 1.1 days / month
- Probability ~3% of days
- Intensity Up to ~19h (P95)
Wet-most-of-day conditions are possible on ~1 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cloud Minor
Mostly cloudy days Measures: Mostly cloudy days (cloud cover >=80%). Observed about 2% of days (0.8 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.8 days / month
~2% of days
Why this matters
- Expected days 0.8 days / month
- Probability ~2% of days
- Intensity Up to ~96% (P95)
Mostly cloudy skies are possible on ~1 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Humidity Minor
High humidity Measures: High humidity days (RH >=80%). Observed about 1% of days (0.5 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.5 days / month
~1% of days
Why this matters
- Expected days 0.5 days / month
- Probability ~1% of days
- Intensity Up to ~90% (P95)
High humidity is possible on ~0 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Cold Minor
Cold days Measures: Cold days (max <=10C). Observed about 1% of days (0.3 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.3 days / month
~1% of days
Why this matters
- Expected days 0.3 days / month
- Probability ~1% of days
- Intensity Up to ~10°C (P95)
Cold daytime conditions are possible on ~0 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Wind Minor
Breezy days Measures: Breezy days (mean wind >=25 km/h). Observed about 1% of days (0.2 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.2 days / month
~1% of days
Why this matters
- Expected days 0.2 days / month
- Probability ~1% of days
- Intensity Up to ~29km/h (P95)
Breezy conditions are possible on ~0 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Cold Minor
Hard freeze nights Measures: Hard freeze nights (min <=-2C). Observed about 1% of days (0.2 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.2 days / month
~1% of days
Why this matters
- Expected days 0.2 days / month
- Probability ~1% of days
- Intensity Up to ~-2°C (P95)
Hard freeze conditions are possible on ~0 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Cloud Minor
Overcast days Measures: Overcast days (cloud cover >=95%). Observed about 1% of days (0.2 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.2 days / month
~1% of days
Why this matters
- Expected days 0.2 days / month
- Probability ~1% of days
- Intensity Up to ~98% (P95)
Overcast skies are possible on ~0 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Frequently asked questions
Is August a good time to visit Johannesburg South?
Typical August days in Johannesburg South reach highs of 20°C (68°F) with nights around 5°C (41°F). It usually feels mild by day and cold after dark. It is one of the drier months, which suits outdoor exploring and sightseeing.
What are temperatures like in August?
Daytime temperatures in August typically peak near 20°C (68°F), while nights drop to around 5°C (41°F). Expect mild afternoons and cold evenings.
How much does it rain in August?
Rainfall in August averages 9 mm (0.35 in) across roughly 3 days. Overall it is a mostly dry time of year, so showers are usually brief rather than all-day downpours.
How many hours of daylight are there in August?
You can expect about 11 hours of daylight in August. Sunrise is typically around 06:35 and sunset near 17:48. Daylight is fairly typical, with enough time for sightseeing.
How strong is the sun in August?
UV levels are often high (around 7). Regular sunscreen and a hat are recommended.
Is it windy in August?
In August, average wind speeds are around 12 km/h (7 mph), with gusts on the windiest days reaching about 55 km/h (34 mph). On the ground, it is it can feel quite windy at times, particularly when weather systems move through.