Weather in Thailand in september
Country-wide climate normals across 14 cities in Thailand.
How Hot Is Thailand in september?
Uniform heat across Thailand's September: averages climb to 31°C nationally with overnight lows of 26°C, narrow spread from coast to interior. The hottest cities like Chatuchak register similar readings to the coolest, so plan for consistently hot weather across the country.
Sunshine in Thailand in september
Thailand sees limited sun in September: just 0.9h a day in Bangkok, with heavy cloud cover common across most regions. Daylight runs from 6:05 am to 6:20 pm, but persistent grey skies and overcast stretches mean direct sunlight is genuinely scarce. Many days pass without any prolonged sunny spells.
Does It Rain In Thailand In september?
Heavy seasonal rains saturate Thailand in September — Bangkok averages 312mm of rain across 26 days, with downpours an almost daily feature. The pattern is consistent across most regions, particularly along monsoon-affected coasts. Expect torrential afternoon storms followed by humid heat.
Is Thailand Humid In september?
Thailand feels humid through September: 73% in Bangkok, similar nationwide. Warm days feel several degrees hotter than the thermometer suggests, and morning mist or post-rain steam is common. Drier upland or interior regions may feel a bit less oppressive.
Wind In Thailand In september
Thailand's September has gentle wind — Bangkok averages 14 kph, and the country tracks similarly. Outdoor activity is comfortable, and afternoon thermals add a pleasant breeze in inland areas.
Cloud Cover In Thailand In september
Thailand's September is dominated by overcast skies: Bangkok averages 79% cloud cover, with similar grey persistence across the country. Days feel dim and soft-lit, with little break in the cloud deck.