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Singapore Weather in December

Everything you need to know about the Singapore Weather in December, including humidity, temperatures and rainfall. Hint: It rains a lot.

Rainy street in Singapore.

Weather in Singapore in December

Welcome to the rainiest month of the year! Singapore gets a whopping 331.9mm of rain in December (compared to February’s 105.1mm).

The beginning of the Northeast Monsoon season is its wet phase and you can expect frequent thunderstorms in the afternoons and evenings. It can bring in northerly to northeasterly winds with it too. 

The temperatures are slightly cooler than the norm with the average monthly temperatures in December being 26.8°C (80°F) but humidity is high thanks to all that rain, with a monthly average of 85.5%.

Click here to read about the Best Time to Visit Singapore.

Singapore temperature in December

The average day time maximum temperature in December is 30.5°C (87°F), with an average minimum temperature of 24.3°C (76°F) and a 24-hour average of 26.8°C (80°F).

How much does it rain in Singapore in December?

A lot. This is Singapore’s wettest month and it rains on average 19 out of 31 days during December, with an average rainfall of 331.9mm. 

Toddler in a rain poncho in Singapore.

Monsoon surges can cause widespread continuous moderate to heavy rain at times accompanied by northerly and northeasterly winds. You can also expect frequent thunderstorms in the afternoon and early evenings. 

Don’t leave your hotel room without an umbrella, as the rain can come on suddenly. Thunderstorms at this time of year can also be severe so it is a good idea to head to a dry sheltered place to wait it out. 

Singapore Humidity in December

Humidity is also at an all-time high in Singapore in December due to all that rainfall. Relative humidity ranges from a minimum average of 68% and a maximum average of 96% and a 24-hour daily average of 85.5%. 

Note that humidity is generally at its highest in the morning just before sunrise and at its lowest in the mid-afternoon (on days when there is no rain). 

You will notice the humidity rising in the lead up to a thunderstorm and it will drop again following the rain. Humidity frequently reaches 100% during prolonged rain periods, so remember to keep hydrated.

What should I pack for Singapore in December?

As you can see from the above statistics, Singapore is hot and humid in December with a lot of rain. You should be always prepared for thunderstorms in the afternoons. 

We recommend packing lightweight cotton clothing and carrying an umbrella and water bottle with you at all times. Also don’t forget your sunscreen, insect repellent and swimwear for when you want to jump in the pool to cool off. 

Click here for a more comprehensive guide to what to pack for Singapore

Fireworks over Singapore skyline.

What else do I need to know about visiting Singapore in December?

It may be hot and humid, but commercially-minded Singapore takes to Christmas in a big way.

Head up to Orchard Road, where the colourful street lighting will soon get you into the festive spirit. Gardens by the Bay also goes Christmas-crazy, with its Christmas Wonderland filled with light displays and Christmas treats.

As with many cities of the world, restaurants get booked up quickly around Christmas in Singapore with staff and friends’ Christmas get-togethers so book ahead to avoid disappointment at this time of year.

For Christmas Day dining, many of Singapore’s top luxury hotels offer all-you-can-eat buffets, which are convivial events. Book early to get a table.

For New Year’s Eve, Singapore puts on a fantastic fireworks display over Marina Bay. If you want to view these from any of the Marina Bay bars with a view, be sure to book your tickets well in advance.

Before you go… Don’t miss this all this useful information about visiting Singapore:

Click here to read about what to expect from the Singapore weather in November and January.