The best time to visit Jakarta is from June to September when the weather is pleasant with a fair possibility of rainfall. Being a subtropical region, the weather in Jakarta is warm and humid throughout the year. There are two major seasons in Jakarta - Dry Season (May - September) and Wet Season (October to April). The dry months are the ... Capital of the Republic of Indonesia, Jakarta is situated on the island of Java and has a population of around 12 million. Its population is highly cosmopolitan and the city extends over a large area which makes exploration on foot highly difficult if not impossible. 14-day weather forecast for Jakarta. Thundery showers and light winds Thundery showers and a gentle breeze Thundery showers and a gentle breeze Thundery showers and a gentle breeze Thundery ... Weather Atlas: Jakarta, Indonesia - June weather forecast and climate information. June weather forecast for Jakarta, Indonesia. The sunshine hours are steady at 255 across the month and coupled up with the steady high temperatures between 26°C (78.8°F) and 32°C (89.6°F) - it starts to feel hot considering the decline in rainfall during the month.