The weather in Sun City can be best described as humid subtropical climate. The summers are quite warm and the winters are usually very mild. Some classifications also consider it to be a tropical climate in the region.
The best time to visit Sun City is usually said to be during the months of May to October. The weather is very pleasant during this period and also there is hardly any rainfall to pour water over your plans. Added benefit is that a lot of animals are visible during this period in the nearby park.