worldweather21°Ccooler than usual
usually 22°C–29°C
cooler than 86% of similar days
night: exceptionally warm
rain: exceptionally wet
wind: exceptionally strong
Weather in Welkom - 14-day forecast
Detailed weather forecast for Welkom, South Africa: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Welkom
today🌧️
21°💧 14.5 mm
Sun🌧️
17°💧 40.1 mm
Mon🌧️
15°💧 24.5 mm
Tue☀️
19°💧 0.9 mm
Wed☁️
21°night 20°
Thu☁️
23°night 19°
Fri🌤️
24°💧 0.3 mm
Sat🌤️
25°💧 0.1 mm
Forecast vs 1991-2020 climate normal
NASA POWERHow does the current forecast compare with normal?
We compare the coming days with weather usually observed at this time of year.
Monday 7 Sept in Welkom, the forecast high is 15°C. Typical daytime temperatures at this time of year range from 23°C to 29°C, so it will be exceptionally cool. It is cooler than 97% of similar days.
17°Cexceptionally cool
usually 22°C–29°C
cooler than 95% of similar days
night: exceptionally warm
rain: exceptionally wet
wind: typical
15°Cexceptionally cool
usually 23°C–29°C
cooler than 97% of similar days
night: exceptionally warm
rain: exceptionally wet
wind: typical
19°Cexceptionally cool
usually 23°C–29°C
cooler than 93% of similar days
night: exceptionally warm
rain: exceptionally wet
wind: exceptionally light
21°Cexceptionally cool
usually 23°C–29°C
cooler than 91% of similar days
night: exceptionally warm
rain: typical rainfall
wind: exceptionally light
23°Ccooler than usual
usually 24°C–30°C
cooler than 81% of similar days
night: exceptionally warm
rain: typical rainfall
wind: exceptionally light
24°Ccooler than usual
usually 24°C–30°C
cooler than 77% of similar days
night: exceptionally warm
rain: more rain than usual
wind: exceptionally light
How warm was this week in previous years?
Each bar shows the average daily high during the same 7-day period in each year.
cooler yearstypical rangewarmer years2026 forecastcurrent forecast
From 1981 to 2025, the 5-11 Sept period averaged 26°C by day. The coolest year was 1981 (19°C) and the warmest was 2007 (30°C). The current forecast averages 20°C - lower than in 96% of historical years.
Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.
14-day forecast - Welkom
Welkom 30 & 45-day weather - long-range outlook
Next 16 days · forecast
22°
around 19° at night · days with rain: 6
Weeks 3-4 · avg for September
27°
around 14° at night · rain chance 0%
Weeks 5-7 · avg for October
26°
around 13° at night · rain chance 0%
The 30 & 45-day outlook for Welkom: the next 16 days are a numerical forecast updated daily - on average 22° by day and 19° at night. Further out we rely on multi-year climate averages: around 27° in September, and about 26° in October. Forecasts beyond two weeks are indicative only.
Day-by-day forecast for Welkom
Saturday5 September 2026
🌧️21°heavy rain
Sunday6 September 2026
🌧️17°heavy rain
Monday7 September 2026
🌧️15°heavy rain
Tuesday8 September 2026
☀️19°clear sky
Wednesday9 September 2026
☁️21°overcast clouds
Thursday10 September 2026
☁️23°overcast clouds
Friday11 September 2026
🌤️24°scattered clouds
Saturday12 September 2026
🌤️25°a few clouds
Sunday13 September 2026
🌧️25°light rain
Monday14 September 2026
🌧️23°light rain
Tuesday15 September 2026
☁️25°overcast clouds
Wednesday16 September 2026
☁️28°broken clouds
Thursday17 September 2026
🌧️26°light rain
Friday18 September 2026
🌧️16°moderate rain
Saturday19 September 2026
🌧️19°light rain
Sunday20 September 2026
🌧️22°light rain
UV index in Welkom - is it safe to sunbathe?
Today the UV index in Welkom is 7 (high) - unprotected fair skin can burn in about 30 minutes. SPF 30-50, a hat and sunglasses are a must. Better stay in shade between 11:00 and 15:00.
Air quality and smog in Welkom
Air quality in Welkom is currently very good. Fine particulate PM2.5: 3.7 µg/m³, PM10: 4.1 µg/m³.
| City | PM2.5 (µg/m³) | PM10 (µg/m³) | Air quality |
|---|---|---|---|
| Welkom | 3.7 | 4.1 | very good |
Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-09-05, 03:00).
Welkom weather through the year
Upcoming public holidays in South Africa: Heritage Day — 24 September · Day of Reconciliation — 16 December · Christmas Day — 25 December.
Nearby and related places
FAQ - Welkom weather
What is the weather like in Welkom today?
Today it is about 21° during the day and 15° at night, heavy rain.
How far ahead can I check the forecast for Welkom?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.