Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
May verdict
Colombo, Sri Lanka in May
Weather score51Mixed
Mixed for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 6.3h per day, enough for a balanced month. Rainfall averages 382mm, so showers are a real planning factor.
May weather
Monthly averages
Temp
31°C
Rain
382mm
Sun
6.3h
Sea
29°C
Weather score
51
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 382mm, so showers are a real planning factor.
Some sun
Sunshine averages 6.3h per day, enough for a balanced month.
Warm sea
Sea temperatures average 29°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Colombo, Sri Lanka with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May31°C average high
May is close to Colombo's usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
May382mm average rain
May is one of Colombo's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to March, July to August, and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
May6.3 hours average sun
May is one of Colombo's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsFebruary to March
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
May29°C average sea
May sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaMarch to May
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
May51 weather score
May 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
These months have the strongest weather score in the monthly averages.
