September 17 Weather: Clear Skies in Jakarta, Very Polluted Air at 06:00

Jakarta: Clear Skies with Hourly Variations in Air Quality

Jakarta is forecast to be clear on Thursday, September 17, 2026, with a maximum temperature of 33°C and a minimum of 26°C. Humidity is forecast to be around 50 percent, while the probability of rain is forecast at 10 percent.

Air quality in Jakarta is forecast to vary by hour: very polluted at 06:00, moderately polluted at 09:00, moderately polluted at 12:00, moderately polluted at 15:00, slightly polluted at 18:00, and moderately polluted at 21:00. The outdoor activity index is rated poor, while the driving index is rated very good.

Surabaya: Clear and Hot with Relatively Good Air Quality

Surabaya is forecast to be clear, with a maximum temperature of 34°C and a minimum of 23°C on Thursday, September 17, 2026. Humidity is forecast to be around 45 percent, and the probability of rain is forecast at 10 percent.

Air quality in Surabaya is forecast to be moderately polluted at 06:00, good at 09:00, good at 12:00, good at 15:00, good at 18:00, and slightly polluted at 21:00. The driving index in Surabaya is rated very good, while the outdoor activity index is rated poor.

Winds in Surabaya at 12:00 and 15:00 are forecast to be around 2 meters per second.

Denpasar: Clean Air, Beware of Mosquitoes Tonight

Denpasar is forecast to be clear on Thursday, September 17, 2026, with a maximum temperature of 32°C and a minimum of 22°C. Humidity is forecast to be around 66 percent, while the probability of rain is forecast at 10 percent.

Air quality in Denpasar is forecast to be good throughout today. The mosquito index indicates a need for mosquito repellent lotion, while the heatstroke index (WBGT) is at the caution level. The driving index is forecast to be very good.

At 21:00 tonight, Denpasar's temperature is forecast to be around 24°C with clear skies.