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Siam Weather in September
Siam, Bangkok, Thailand
About Siam in September
Siam Square is Bangkok's commercial epicenter and thermal hotspot — the convergence of six BTS lines, multiple mega-malls, and dense pedestrian crowds generates extraordinary waste heat. Air conditioning exhaust from the malls creates a heated street-level environment even at night.
For detailed monthly temperature and rainfall data for Bangkok in September, see the Bangkok September weather guide.