Warm
Average highs sit around 30°C, giving warm days by monthly-average standards.
December verdict
Colombo, Sri Lanka in December
Weather score67Good
Good for holiday weather
Average highs sit around 30°C, giving warm days by monthly-average standards. Sunshine averages 6.8h per day, enough for a balanced month. Rainfall averages 166mm, so some wet days are possible.
December weather
Monthly averages
Temp
30°C
Rain
166mm
Sun
6.8h
Sea
28°C
Weather score
67
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 166mm, so some wet days are possible.
Some sun
Sunshine averages 6.8h per day, enough for a balanced month.
Warm sea
Sea temperatures average 28°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
December30°C average high
December 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
December166mm average rain
December sits near Colombo's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
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
December6.8 hours average sun
December is below Colombo's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsFebruary to March
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December28°C average sea
December is below Colombo's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaMarch to May
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
December67 weather score
December sits close to Colombo's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJanuary to March
These months have the strongest weather score in the monthly averages.
