Climate Insights for Stellenbosch

The climate in Stellenbosch is temperate. The average annual temperature is 16°C and approximately 685mm of precipitation falls per year. Juni is the wettest month, receiving around 146mm of rainfall. Stellenbosch is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: Januar, Februar, März. The coldest months are Juli, August, Juni, when temperatures can drop to 9°C.

Stellenbosch sees moderate temperature variation throughout the year, ranging from 9°C to 25°C. The warmest month is Januar, when average highs reach 25°C and the mean temperature sits around 21°C. Juli is the coolest month, with minimum temperatures around 9°C and an average of 12°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows. The sharpest temperature change occurs between September and October, with a 3°C shift in average temperatures.

Stellenbosch is a relatively dry area, receiving approximately 685mm of precipitation annually, which averages out to around 57mm per month. The wettest month is June, averaging 146mm of rainfall. July and August also tend to see above-average precipitation. The driest month is February, with just 13mm. That's 133mm less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Stellenbosch is moderately windy, with an average annual wind speed of 20km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 23km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in May, with average winds dropping to 17km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 6km/h between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 19km/h in winter, 21km/h in spring, 22km/h in summer, 18km/h in autumn.

It is currently winter in Stellenbosch, which began on June 21, 2026. Stellenbosch is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in Januar at around 25°C, while the coldest stretch bottoms out in Juli near 9°C. Autumn is next, beginning on March 20, 2026 — 2 days from now.

The best time to visit Stellenbosch is during Januar, Februar, März, April, Oktober, November and Dezember, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 28mm per month. By contrast, Juli can be quite cold with temperatures dropping to 9°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Stellenbosch based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.