Singapore weather in December
Singapore averages 29°C by day and 24°C at night in December, with the sea at 29°C and about 318 mm of rain in the month.
Day
29°C
Night
24°C
Sea
29°C
Rain
318 mm
Flight from London
13½h
What December feels like
December is hot but wet in Singapore: rainy season, so pack for showers.
The sea is warm at 29°C: comfortable for long swims.
It is rainy season: about 318 mm of rain falls in the month.
That is 20°C warmer than an average December day in London.
Of the 56 sun destinations we track, Singapore is the #9 warmest in December.
Going to Singapore in December?
Share the TikToks and Instagram Reels you've saved for Singapore to Dream Trip. It finds the places, pins them on a map and builds your days around them.
Want it warmer in December?
These are hotter than Singapore this month for at most an hour and a half more flying:
Singapore weather by month
December is highlighted. Compare with November and January, or see the full year in Singapore.
| Month | Day | Night | Sea | Rain |
|---|---|---|---|---|
| January | 29°C | 24°C | 28°C | 292 mm |
| February | 30°C | 24°C | 28°C | 124 mm |
| March | 31°C | 24°C | 29°C | 226 mm |
| April | 30°C | 25°C | 30°C | 303 mm |
| May | 30°C | 25°C | 31°C | 313 mm |
| June | 30°C | 25°C | 31°C | 290 mm |
| July | 30°C | 25°C | 30°C | 202 mm |
| August | 30°C | 25°C | 30°C | 243 mm |
| September | 30°C | 25°C | 30°C | 221 mm |
| October | 30°C | 24°C | 30°C | 303 mm |
| November | 30°C | 24°C | 31°C | 370 mm |
| December | 29°C | 24°C | 29°C | 318 mm |
Singapore in December: quick answers
Is Singapore hot in December?
December is hot but wet in Singapore: rainy season, so pack for showers. Average highs are 29°C and lows 24°C.
Can you swim in Singapore in December?
The sea is warm at 29°C: comfortable for long swims.
Does it rain in Singapore in December?
It is rainy season: about 318 mm of rain falls in the month.
What is the warmest month in Singapore?
March, at an average high of 31°C. The coolest is January at 29°C.
How long is the flight to Singapore from the UK?
About 13½h direct from London, estimated from the 10,871 km distance. Check your airline for exact times.
Still choosing? See where is hot in December for every destination ranked by temperature, sea and flight time.
How we measured this
Averages of every day in December from 2016 to 2025, from the Open-Meteo historical weather archive (ECMWF ERA5 reanalysis). Sea temperature is the 2023 to 2025 average from the Open-Meteo marine archive. Rain is the average monthly total. Reanalysis describes an area about 25 km across, so sheltered resorts can run a degree or two warmer. Flight time is a distance-based estimate from London Heathrow.
Planning Singapore in December?
Save the restaurants, beaches and views you find on TikTok and Instagram for Singapore straight to a map, then let Dream Trip turn them into a day-by-day plan.
