About this Market

Station-specific Windfinder data for Halim Perdanakusuma (WIHH) puts the 29 September high at 34°C, with measurable precipitation around 0.46–2.04mm during the afternoon and evening hours . BMKG-aligned Chinese sources cap Jakarta at only 31°C for the same date —a 1–2°C gap consistent with WIHH’s historical tendency to run hotter than administrative-region forecasts during El Niño dry seasons . Historical METAR data for September at this station shows an average maximum of 33.6°C, with 2025 reaching 34.2°C, so the 32°C station forecast sits slightly below the recent September norm . Feels-like conditions will run higher: WeatherSpark notes a 98% probability of oppressive, muggy conditions throughout 29 September, with the most uncomfortable period around 3:30 AM . Precipitation risk is moderate: Windfinder shows rain activity in the afternoon window, while BMKG’s regional outlook keeps heavier rain confined outside Jakarta proper . PM2.5 at the airport station sits at 22 µg/m³ (US AQI 75, “Moderate”), which is relatively benign for Jakarta but still 4.4× the WHO annual guideline . For prediction markets anchored on WIHH, the station-specific 32°C is the operative figure, not BMKG’s 31°C city number.