Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
September verdict
Sri Lanka in September
Weather score65Good
Good for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 6h per day, enough for a balanced month. Rainfall averages 117mm, so some wet days are possible.
September weather
Monthly averages
Temp
31°C
Rain
117mm
Sun
6h
Sea
24°C
Weather score
65
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 117mm, so some wet days are possible.
Some sun
Sunshine averages 6h per day, enough for a balanced month.
Swimmable
Sea temperatures average 24°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Sri Lanka with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September31°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsMarch to September
This stretch sets the upper range for average daytime heat.
Rain
September117mm average rain
September sits on the drier side of Sri Lanka's year, which helps with sightseeing and transfers.
Driest monthsJanuary to March and May to September
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September6 hours average sun
September is one of Sri Lanka's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsFebruary to April
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September24°C average sea
September is close to Sri Lanka's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaMarch to June and October to November
Sea temperatures are usually near 25°C in this stretch, so swimming comfort is at its strongest.
Weather score
September65 weather score
September sits close to Sri Lanka's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJanuary to March and June to August
These months have the strongest weather score in the monthly averages.
