Avg High
Johannesburg South in March
Avg Low
Rain
Daylight
12h
What to expect
In Johannesburg South, March sits in early autumn, a shoulder-season month where the feel can shift as the season turns. Most days feel warm without being relentless, with evenings that ease back comfortably. Comfort is usually predictable, so a standard day plan works well. Daylight is moderate, so steady pacing works well.
March in context
How it compares to the rest of the year in Johannesburg South.
Hottest (avg)
#7 / 12
Wettest (avg)
#5 / 12
Daylight Hours
#6 / 12
Windiest (avg)
#12 / 12
Highest UV
#6 / 12
Most Humid
#3 / 12
Monthly climate breakdown
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight hours
- 12.2 h
- UV index (max)
- 9
- Typical sun hours
- 06:09 - 18:23
Rain & Snow
- Total rain
-
- Rainy days
- 16 days
- Cloud cover (avg)
- 42%
Humidity & Wind
- Humidity (avg)
- 70%
- Wind (avg)
-
- Wind (max gusts)
-
Daily climate explorer
Day 15 selected for March. Typical high 23.1°C and low 12.6°C.
Typical disruptions in March
Based on 30 years of historical data, these are the disruption patterns most likely to affect plans in March.
Rain High impact
Rain disruption Measures: Likely rain disruption days. Observed about 17% of days (5.1 days/month) in March. Historical risk signal only, not a day-by-day forecast.
5.1 days / month
~17% of days
Why this matters
- Expected days 5.1 days / month
- Probability ~17% of days
- Intensity Up to ~26mm (P95)
Rain disruption risk appears on ~5 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain High impact
Washout risk Measures: Washout day risk. Observed about 15% of days (4.6 days/month) in March. 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 ~27mm (P95)
Washout conditions are possible on ~5 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain High impact
Heavy rain days Measures: Heavy rain days (>=10mm). Observed about 8% of days (2.4 days/month) in March. Historical risk signal only, not a day-by-day forecast.
2.4 days / month
~8% of days
Why this matters
- Expected days 2.4 days / month
- Probability ~8% of days
- Intensity Up to ~31mm (P95)
Heavy rain is possible on ~2 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Visibility Minor
Fog-likely signal Measures: Fog-likely visibility proxy. Observed about 3% of days (0.8 days/month) in March. Historical risk signal only, not a day-by-day forecast.
0.8 days / month
~3% of days
Why this matters
- Expected days 0.8 days / month
- Probability ~3% of days
- Intensity Up to ~96% (P95)
Fog-likely conditions are possible on ~1 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Show all disruptions (13 more)
Rain High impact
Washout run Measures: Multi-day washout runs. Observed about 1.0 days/month in March. Historical risk signal only, not a day-by-day forecast.
1.0 days / month
Probability unavailable
Why this matters
- Expected days 1.0 days / month
- Probability —
- Intensity Up to ~39mm (P95)
Multi-day washout runs are possible on ~1 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain High impact
Very heavy rain Measures: Very heavy rain days (>=25mm). Observed about 1% of days (0.3 days/month) in March. 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 ~65mm (P95)
Very heavy rain is possible on ~0 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 1% of days (0.4 days/month) in March. 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 ~5°C (P95)
Cold feels-like nights are possible on ~0 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Rain Minor
Wet days Measures: Wet days (>=0.1mm). Observed about 61% of days (18.9 days/month) in March. Historical risk signal only, not a day-by-day forecast.
18.9 days / month
~61% of days
Why this matters
- Expected days 18.9 days / month
- Probability ~61% of days
- Intensity Up to ~16mm (P95)
Measurable rain is possible on ~19 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 46% of days (14.1 days/month) in March. Historical risk signal only, not a day-by-day forecast.
14.1 days / month
~46% of days
Why this matters
- Expected days 14.1 days / month
- Probability ~46% of days
- Intensity Up to ~18h (P95)
Several rainy hours are possible on ~14 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 28% of days (8.8 days/month) in March. Historical risk signal only, not a day-by-day forecast.
8.8 days / month
~28% of days
Why this matters
- Expected days 8.8 days / month
- Probability ~28% of days
- Intensity Up to ~99% (P95)
Cloudy skies are possible on ~9 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain Minor
Wet most of day Measures: Wet-most-of-day signal (>=6h rain). Observed about 27% of days (8.3 days/month) in March. Historical risk signal only, not a day-by-day forecast.
8.3 days / month
~27% of days
Why this matters
- Expected days 8.3 days / month
- Probability ~27% of days
- Intensity Up to ~19h (P95)
Wet-most-of-day conditions are possible on ~8 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Humidity Minor
High humidity Measures: High humidity days (RH >=80%). Observed about 24% of days (7.4 days/month) in March. Historical risk signal only, not a day-by-day forecast.
7.4 days / month
~24% of days
Why this matters
- Expected days 7.4 days / month
- Probability ~24% of days
- Intensity Up to ~93% (P95)
High humidity is possible on ~7 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Wind Minor
Gusty days Measures: Gusty days (>=40 km/h). Observed about 16% of days (5.0 days/month) in March. Historical risk signal only, not a day-by-day forecast.
5.0 days / month
~16% of days
Why this matters
- Expected days 5.0 days / month
- Probability ~16% of days
- Intensity Up to ~56km/h (P95)
Gusty conditions are possible on ~5 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Cloud Minor
Mostly cloudy days Measures: Mostly cloudy days (cloud cover >=80%). Observed about 13% of days (4.1 days/month) in March. Historical risk signal only, not a day-by-day forecast.
4.1 days / month
~13% of days
Why this matters
- Expected days 4.1 days / month
- Probability ~13% of days
- Intensity Up to ~100% (P95)
Mostly cloudy skies are possible on ~4 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cloud Minor
Overcast days Measures: Overcast days (cloud cover >=95%). Observed about 5% of days (1.6 days/month) in March. Historical risk signal only, not a day-by-day forecast.
1.6 days / month
~5% of days
Why this matters
- Expected days 1.6 days / month
- Probability ~5% of days
- Intensity Up to ~100% (P95)
Overcast skies are possible on ~2 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 3% of days (0.8 days/month) in March. Historical risk signal only, not a day-by-day forecast.
0.8 days / month
~3% of days
Why this matters
- Expected days 0.8 days / month
- Probability ~3% 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 ~1 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Heat Minor
Hot days Measures: Hot days (>=30C). Observed about 1% of days (0.3 days/month) in March. 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 ~31°C (P95)
Hot days are possible on ~0 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Frequently asked questions
Is March a good time to visit Johannesburg South?
Typical March days in Johannesburg South reach highs of 23°C (73°F) with nights around 13°C (55°F). It usually feels warm by day and cool after dark. Overall, March sits in the middle of the Johannesburg South climate range.
What are temperatures like in March?
In March, you can usually expect highs of 23°C (73°F) and lows near 13°C (55°F). That means warm days and cool nights, so pack layers you can add or remove.
How much does it rain in March?
Rainfall in March averages 81 mm (3.2 in) across roughly 16 days. Overall it is a very wet time of year, so a light rain jacket and waterproof shoes are very handy.
How many hours of daylight are there in March?
You can expect about 12 hours of daylight in March. Sunrise is typically around 06:09 and sunset near 18:23. Daylight is fairly typical, with enough time for sightseeing.
How strong is the sun in March?
UV levels frequently reach very high levels (around 9), so strong sun protection is essential, especially around midday.
Is it windy in March?
In March, average wind speeds are around 9 km/h (6 mph), with gusts on the windiest days reaching about 42 km/h (26 mph). On the ground, it is it often feels breezy, especially in more exposed spots or along the coast.