Climate Insights for Grootfontein

The climate in Grootfontein is warm and mild. The average annual temperature is 22°C and approximately 690mm of precipitation falls per year. January is the wettest month, receiving around 181mm of rainfall. Grootfontein 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: October, November, September. The coldest months are July, June, August, when temperatures can drop to 8°C.

Temperatures in Grootfontein vary considerably across the year, with a 25°C difference between the coldest and warmest months. The warmest month is October, when average highs reach 33°C and the mean temperature sits around 26°C. July is the coolest month, with minimum temperatures around 8°C and an average of 15°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between August and September, with a 4°C shift in average temperatures.

Grootfontein is a relatively dry area, receiving approximately 690mm of precipitation annually, which averages out to around 57mm per month. The wettest month is January, averaging 181mm of rainfall. February and December also tend to see above-average precipitation. The driest month is July, with just 0mm. That's 181mm less than January, 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.

Grootfontein is relatively calm, with an average annual wind speed of 11km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in February, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 12km/h in winter, 11km/h in spring, 9km/h in summer, 10km/h in autumn.

It is currently spring in Grootfontein, which began on September 23, 2026. Grootfontein 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 October at around 33°C, while the coldest stretch bottoms out in July near 8°C. Summer is next, beginning on December 21, 2026 (87 days from now).

The best time to visit Grootfontein is during April, May, June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 8mm per month. By contrast, October can be uncomfortably hot with temperatures reaching 33°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Grootfontein 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.