Sri Lanka
Sri Lanka in December: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Sri Lanka in December is climatically well suited to beach holidays. The average daily high is around 29 °C, and the sea is about 28 °C. With about 21 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
59/100 · #6
Warmth
#6
Dryness
#5
Sun
#11
Sea warmth
#7
Published best categories: none
Sri Lanka · DecemberPhoto: Luboš Holič · CC BY-SA 3.0Climate facts
- Average high
- 29 °C
- Average low
- 24 °C
- Sea
- 28 °C
- Rainy days (est.)
- 21 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 82 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| November | 28 | 25 | 26 | 311 | 5.6 | 84 | 2.8 | 29 | 57 |
| December (selected) | 29 | 24 | 21 | 174 | 5.7 | 82 | 2.8 | 28 | 59 |
| January | 29 | 23 | 14 | 94 | 6.2 | 78 | 2.6 | 28 | 68 |
How do the previous and next months compare?
Baseline: December (59/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| November | -2 | -0.4 °C | +0.7 °C | +5 | +137 mm | -0.1 h | +2.4 % | ±0 m/s | +0.3 °C |
| January | +9 | +0.5 °C | -0.7 °C | -7.2 | -80 mm | +0.5 h | -3.2 % | -0.2 m/s | -0.4 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Sri Lanka in December?
The average daily high is around 29 °C, with an average daily low of about 24 °C.
Can you swim in Sri Lanka in December?
The sea is about 28 °C (very warm).
Does it rain a lot in Sri Lanka in December?
The curated estimate is about 21 rainy days per month, not a directly measured long-term average. Total precipitation averages around 174 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Sri Lanka?
By the climate score, January, February, July and August are the strongest months for Sri Lanka. For a beach trip: January, February, July and August. December is not among them.