Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
December verdict
Sri Lanka in December
Weather score59Good
Good for holiday weather
Average highs sit around 28°C, giving warm days by monthly-average standards. Sunshine averages 6h per day, enough for a balanced month. Rainfall averages 249mm, so showers are a real planning factor.
December weather
Monthly averages
Temp
28°C
Rain
249mm
Sun
6h
Sea
24°C
Weather score
59
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 249mm, so showers are a real planning factor.
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
December28°C average high
December is cooler than the yearly average, which can make sightseeing feel gentler than in hotter months.
Warmest monthsMarch to September
This stretch sets the upper range for average daytime heat.
Rain
December249mm average rain
December is wetter than Sri Lanka's yearly average, so flexible plans matter more.
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
December6 hours average sun
December 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
December24°C average sea
December is below Sri Lanka's yearly sea-temperature average, so swimming can feel fresher.
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
December59 weather score
December scores below Sri Lanka's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJanuary to March and June to August
These months have the strongest weather score in the monthly averages.
