Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
September verdict
Thailand in September
Weather score50Mixed
Mixed for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 5.3h per day, enough for a balanced month. Rainfall averages 298mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
31°C
Rain
298mm
Sun
5.3h
Sea
18°C
Weather score
50
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 298mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.3h per day, enough for a balanced month.
Cool sea
Sea temperatures average 18°C, so the water can feel cool.
Map
Weather map
Compare Thailand with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September31°C average high
September is on the cooler side of Thailand's year, useful if you prefer less intense daytime heat.
Warmest monthsMarch to May
This stretch sets the upper range for average daytime heat.
Rain
September298mm average rain
September is one of Thailand's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to April and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.3 hours average sun
September is one of Thailand's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsJanuary to April
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September18°C average sea
September is close to Thailand's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaMarch to November
Sea temperatures are usually near 18°C in this stretch, so swimming comfort is at its strongest.
Weather score
September50 weather score
September is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJanuary to March and December
These months have the strongest weather score in the monthly averages.
