South Africa Weather Today – Sunday, 20 September 2026
Johannesburg will experience overcast conditions on Sunday, 20 September 2026, with temperatures ranging between 12°C and 22°C as cloud cover dominates much of the country. The national pattern shows widespread overcast skies across most inland provinces, while the Western Cape enjoys clear conditions with temperatures reaching 22°C. The national average temperature sits at 20°C, with Mpumalanga recording the warmest conditions at 28°C and Gauteng experiencing some of the coolest minimums at 12°C overnight.
What This Means for Your Day
The overcast skies will keep temperatures moderate across most regions, making outdoor activities comfortable without excessive heat. Residents in Gauteng and Free State should prepare for a cool start to the day with morning temperatures in the low teens, requiring a light jacket until midday. Mpumalanga’s warmer conditions offer the most favourable weather for outdoor plans, while coastal areas in KwaZulu-Natal will experience higher humidity levels. Cape Town residents can take advantage of the clear skies and mild temperatures for Sunday outings.
South Africa Weather Highlights
- Warmest region: Mpumalanga reaches 28°C in Mbombela
- Coolest morning: Gauteng drops to 12°C overnight
- Clearest conditions: Western Cape enjoys clear skies with 22°C highs
- Most overcast: Inland provinces from Gauteng to Free State remain heavily clouded
- Strongest winds: North West and Limpopo experience winds up to 24 km/h from the north-northeast
What to Expect Across the Provinces
Gauteng
Johannesburg faces overcast clouds throughout Sunday with temperatures between 12°C and 22°C. The 57% humidity and north-northeasterly winds at 14 km/h will create mild conditions, though the cloud cover will limit sunshine. Morning temperatures require warm clothing, but conditions will become comfortable by afternoon.
Western Cape
Cape Town stands out with clear skies and temperatures ranging from 15°C to 22°C. Southerly winds at 11 km/h and 64% humidity create pleasant coastal conditions. This is the best weather in the country today, ideal for outdoor activities and beach visits without the risk of rain or excessive cloud cover.
KwaZulu-Natal
Durban experiences overcast conditions with temperatures between 19°C and 22°C. The coastal city faces 81% humidity and east-northeasterly winds at 12 km/h, creating muggy conditions despite the moderate temperatures. The overnight minimum of 19°C indicates a warm evening ahead.
Mpumalanga
Mbombela records the day’s warmest temperatures, ranging from 18°C to 28°C under broken clouds. East-northeasterly winds at 9 km/h and 54% humidity make this the most favourable region for warmth-seekers. The 10-degree temperature range means a cool start but significant warming by midday.
Limpopo
Polokwane sees few clouds with temperatures between 14°C and 23°C. Stronger east-northeasterly winds at 24 km/h and 64% humidity characterise conditions in the province. The partial cloud cover allows more sunshine compared to provinces further south.
North West
Mahikeng remains overcast with temperatures from 14°C to 24°C. North-northeasterly winds at 24 km/h represent some of the strongest in the country today, with 53% humidity keeping conditions dry despite the cloud cover. The morning will start cool before warming significantly by afternoon.
Free State
Bloemfontein faces overcast skies with temperatures between 13°C and 22°C. Northerly winds at 13 km/h and 58% humidity create stable conditions across the central province. The persistent cloud cover mirrors conditions in neighbouring Gauteng and North West.
Northern Cape
Kimberley experiences overcast conditions with temperatures ranging from 16°C to 24°C. Northerly winds at 21 km/h and 57% humidity mark the driest conditions among the overcast provinces. The warmer daytime high makes this one of the more comfortable inland regions despite the cloud cover.
Eastern Cape
Gqeberha sees few clouds with temperatures between 15°C and 20°C. South-southwesterly winds at 9 km/h and 74% humidity create typical coastal conditions for the region. The partial clearing offers more sunshine than most inland areas, though temperatures remain moderate.
Weekend Outlook
Monday will continue the overcast pattern across Johannesburg with temperatures between 14°C and 22°C. Tuesday brings light rain to Gauteng with the same temperature range, marking the first precipitation of the week. Conditions improve Wednesday with broken clouds and temperatures climbing to 24°C, followed by clear skies on Thursday as temperatures reach 27°C. The warming trend and clearing pattern suggest a significantly improved end to the working week.
Weather Tips for Today
- Layer clothing for the cool morning in Gauteng, Free State and Limpopo where temperatures start in the low teens
- Plan outdoor activities in the Western Cape to take advantage of the clear skies and mild temperatures
- Mpumalanga residents should apply sunscreen despite cloud cover as UV levels remain significant
- Coastal areas in KwaZulu-Natal will feel warmer than the thermometer suggests due to high humidity
- Secure loose items in North West and Limpopo where winds reach 24 km/h
- No rain gear required today, but keep an umbrella ready for Tuesday’s forecast precipitation
Useful Weather and Travel Links
Looking for more to do after checking the forecast? Explore the latest events in Gauteng and plan your day around the weather.
You can also browse our weather category for more South Africa weather updates and recent forecast articles.
For official forecasting and weather advisories, visit the South African Weather Service.
South Africa Weather Warning Today: Gauteng Forecast and Alerts
Last updated: 25 February 2026
This weather hub covers Gauteng-focused alerts, daily forecast context, and practical preparation tips.
Today in Gauteng
Check current alert conditions, possible impact areas, and likely weather trends for the next 24 hours.
7-Day Snapshot
Use this hub to understand short-term changes in rain risk, heat conditions, and storm activity.
Where To Track Live Updates
Safety Checklist
- Plan around severe storm windows.
- Avoid flood-prone routes where possible.
- Monitor official warnings before travel.
FAQ
How often is this page updated?
As new weather alerts and forecast updates are published.