Avg High
Johannesburg South in April
Avg Low
Rain
Daylight
11h
What to expect
In Johannesburg South, April sits in mid-autumn, a shoulder-season month where the feel can shift as the season turns. Most days land in a mild, easygoing zone, with evenings that ease back comfortably. Daylight is moderate, so steady pacing works well. Comfort is usually predictable, so a standard day plan works well. A practical way to frame the month is that moist air can add weight to longer walking days, while intermittent wet spells can nudge plans around.
April in context
How it compares to the rest of the year in Johannesburg South.
Hottest (avg)
#8 / 12
Wettest (avg)
#7 / 12
Daylight Hours
#8 / 12
Windiest (avg)
#11 / 12
Highest UV
#8 / 12
Most Humid
#5 / 12
Monthly climate breakdown
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight hours
- 11.5 h
- UV index (max)
- 8
- Typical sun hours
- 06:23 - 17:51
Rain & Snow
- Total rain
-
- Rainy days
- 10 days
- Cloud cover (avg)
- 37%
Humidity & Wind
- Humidity (avg)
- 67%
- Wind (avg)
-
- Wind (max gusts)
-
Daily climate explorer
Day 15 selected for April. Typical high 21.6°C and low 9.9°C.
Typical disruptions in April
Based on 30 years of historical data, these are the disruption patterns most likely to affect plans in April.
Rain High impact
Washout risk Measures: Washout day risk. Observed about 9% of days (2.8 days/month) in April. Historical risk signal only, not a day-by-day forecast.
2.8 days / month
~9% of days
Why this matters
- Expected days 2.8 days / month
- Probability ~9% of days
- Intensity Up to ~27mm (P95)
Washout conditions are possible on ~3 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cold Moderate
Cold feels-like nights Measures: Cold feels-like nights (min <=5C). Observed about 15% of days (4.6 days/month) in April. Historical risk signal only, not a day-by-day forecast.
4.6 days / month
~15% of days
Why this matters
- Expected days 4.6 days / month
- Probability ~15% of days
- Intensity Up to ~5°C (P95)
Cold feels-like nights are possible on ~5 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Rain Moderate
Rain disruption Measures: Likely rain disruption days. Observed about 11% of days (3.2 days/month) in April. Historical risk signal only, not a day-by-day forecast.
3.2 days / month
~11% of days
Why this matters
- Expected days 3.2 days / month
- Probability ~11% of days
- Intensity Up to ~23mm (P95)
Rain disruption risk appears on ~3 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Show all disruptions (15 more)
Rain High impact
Heavy rain days Measures: Heavy rain days (>=10mm). Observed about 5% of days (1.4 days/month) in April. Historical risk signal only, not a day-by-day forecast.
1.4 days / month
~5% of days
Why this matters
- Expected days 1.4 days / month
- Probability ~5% of days
- Intensity Up to ~31mm (P95)
Heavy rain is possible on ~1 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain High impact
Washout run Measures: Multi-day washout runs. Observed about 0.5 days/month in April. Historical risk signal only, not a day-by-day forecast.
0.5 days / month
Probability unavailable
Why this matters
- Expected days 0.5 days / month
- Probability —
- Intensity Up to ~19mm (P95)
Multi-day washout runs are possible on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Wind High impact
Strong gusts Measures: Strong gust days (>=60 km/h). Observed about 1% of days (0.2 days/month) in April. 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 ~70km/h (P95)
Strong gusts are possible on ~0 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Rain High impact
Very heavy rain Measures: Very heavy rain days (>=25mm). Observed about 1% of days (0.2 days/month) in April. 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 ~42mm (P95)
Very heavy rain is possible on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain Minor
Wet days Measures: Wet days (>=0.1mm). Observed about 44% of days (13.1 days/month) in April. Historical risk signal only, not a day-by-day forecast.
13.1 days / month
~44% of days
Why this matters
- Expected days 13.1 days / month
- Probability ~44% of days
- Intensity Up to ~15mm (P95)
Measurable rain is possible on ~13 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 30% of days (8.9 days/month) in April. Historical risk signal only, not a day-by-day forecast.
8.9 days / month
~30% of days
Why this matters
- Expected days 8.9 days / month
- Probability ~30% of days
- Intensity Up to ~17h (P95)
Several rainy hours are possible on ~9 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cloud Minor
Cloudy days Measures: Cloudy days (cloud cover >=60%). Observed about 23% of days (7.0 days/month) in April. Historical risk signal only, not a day-by-day forecast.
7.0 days / month
~23% of days
Why this matters
- Expected days 7.0 days / month
- Probability ~23% of days
- Intensity Up to ~99% (P95)
Cloudy skies are possible on ~7 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Wind Minor
Gusty days Measures: Gusty days (>=40 km/h). Observed about 20% of days (5.9 days/month) in April. Historical risk signal only, not a day-by-day forecast.
5.9 days / month
~20% of days
Why this matters
- Expected days 5.9 days / month
- Probability ~20% of days
- Intensity Up to ~58km/h (P95)
Gusty conditions are possible on ~6 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Humidity Minor
High humidity Measures: High humidity days (RH >=80%). Observed about 20% of days (5.9 days/month) in April. Historical risk signal only, not a day-by-day forecast.
5.9 days / month
~20% of days
Why this matters
- Expected days 5.9 days / month
- Probability ~20% of days
- Intensity Up to ~92% (P95)
High humidity is possible on ~6 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Rain Minor
Wet most of day Measures: Wet-most-of-day signal (>=6h rain). Observed about 18% of days (5.3 days/month) in April. Historical risk signal only, not a day-by-day forecast.
5.3 days / month
~18% of days
Why this matters
- Expected days 5.3 days / month
- Probability ~18% of days
- Intensity Up to ~20h (P95)
Wet-most-of-day conditions are possible on ~5 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 11% of days (3.2 days/month) in April. Historical risk signal only, not a day-by-day forecast.
3.2 days / month
~11% of days
Why this matters
- Expected days 3.2 days / month
- Probability ~11% of days
- Intensity Up to ~100% (P95)
Mostly cloudy skies are possible on ~3 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cold Minor
Cold nights Measures: Cold nights (min <=5C). Observed about 4% of days (1.2 days/month) in April. Historical risk signal only, not a day-by-day forecast.
1.2 days / month
~4% of days
Why this matters
- Expected days 1.2 days / month
- Probability ~4% of days
- Intensity Up to ~5°C (P95)
Cold nights are possible on ~1 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 3% of days (0.9 days/month) in April. Historical risk signal only, not a day-by-day forecast.
0.9 days / month
~3% of days
Why this matters
- Expected days 0.9 days / month
- Probability ~3% of days
- Intensity Up to ~100% (P95)
Overcast skies are possible on ~1 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Visibility Minor
Fog-likely signal Measures: Fog-likely visibility proxy. Observed about 1% of days (0.3 days/month) in April. 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 ~96% (P95)
Fog-likely conditions are possible on ~0 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Other Minor
Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data Measures: Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data. Observed about 1% of days (0.3 days/month) in April. 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 ~96 (P95)
Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data is possible on ~0 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Frequently asked questions
Is April a good time to visit Johannesburg South?
Typical April days in Johannesburg South reach highs of 21°C (70°F) with nights around 10°C (50°F). It usually feels mild by day and cool after dark. Overall, April sits in the middle of the Johannesburg South climate range.
What are temperatures like in April?
In April, you can usually expect highs of 21°C (70°F) and lows near 10°C (50°F). That means mild days and cool nights, so pack layers you can add or remove.
How much does it rain in April?
Rainfall in April averages 48 mm (1.9 in) across roughly 10 days. Overall it is a quite rainy time of year, so showers are usually brief rather than all-day downpours.
How many hours of daylight are there in April?
You can expect about 11 hours of daylight in April. Sunrise is typically around 06:23 and sunset near 17:51. Daylight is fairly typical, with enough time for sightseeing.
How strong is the sun in April?
UV levels are often high (around 8). Regular sunscreen and a hat are recommended.
Is it windy in April?
In April, average wind speeds are around 9 km/h (6 mph), with gusts on the windiest days reaching about 45 km/h (28 mph). On the ground, it is it often feels breezy, especially in more exposed spots or along the coast.