Due to multiple factors, expect to potentially pay more when booking in December. For low rates, May can be a great choice for travel to Cape Town International. Flights to Cape Town International from Chaudhary Charan Singh in May are about R1 980 on average during May, but can be found for as low as R1 340.
In Lucknow, there will be greater rainfall in Lucknow compared to Cape Town over the next 4 days.
You can imagine temperatures to be in the 40 °C range in May. The weather in Cape Town is generally colder than Lucknow's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.