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Heavy rain on a Bangkok road, cars with their lights on in the downpour.
Layover guideBangkok · BKK

Weather in Bangkok

Hot year-round; wet season May–Oct peaking in September, driest and mildest Dec–Feb, hottest April–May.

Chainwit. / Wikimedia Commons · CC BY-SA 4.0
All of Bangkok

Bangkok is hot in every month: mean daily maximums sit around 31–35 C all year, with April–May the peak (34–35 C max) and December–January the mildest (nights around 21 C).

The wet season runs roughly May through October; September is the wettest month in the climate normals (about 344 mm over ~18 rain days), so expect heavy afternoon downpours and pack accordingly on autumn layovers.

January–March is the dry window (1–2 rain days a month); annual rainfall of about 1,500 mm is concentrated almost entirely in the May–October monsoon months.

Data are the Thai Meteorological Department's climate normals as published through the WMO World Weather Information Service.

  1. WMO World Weather Information Service — Bangkok climate normals (data: Thai Meteorological Department) · checked 2026-08-18

The rest of Bangkok

The whole guide
Getting out of the airportMetered public taxis from Level 1 between Gates 4 and 7, plus a 50 baht airport surcharge and tolls on top, and a rail link from Level B1 that stops at midnight.Ride-hailingGrab is the app the airport names, with a designated 24-hour pick-up point at Level 1, Gate 4, and no published fare, so the in-app quote is the only number you get.Local laws that catch crew outVapes are illegal to even carry, criticism of the monarchy carries a long prison sentence, and alcohol sales stop between midnight and 11am.Staying connectedTourist SIM/eSIM at 24h airport counters, passport required by regulation; free airport wifi is 60 minutes per session.Eating near the crew hotelsYaowarat (Chinatown) is the street-food district and runs as a night market every evening; MRT Wat Mangkon puts you in the middle of it.What to buyGold on Yaowarat, everything else at Chatuchak on weekends; VAT refund needs a 2,000 THB per-store minimum and the P.P.10 form at purchase.TippingNot a usual practice, though it is becoming more common, and most hotels and restaurants already add a 10% service charge.