Weather in Singapore in December

How December compares

December is the 12th warmest month of the year in Singapore and ranks 19th of 134 destinations we compare for December - see where else is hot in December. Against London's average high of 7.7°C in December, Singapore is 20.1°C warmer by day and 22.1°C warmer at night.

Daytime and night-time in December

The typical December day in Singapore peaks at 27.8°C, but that is an average: the warmest 10% of days reach 29.0°C or more. About 99% of days top 25°C and 1 in 83 pass 30°C. Nights average 24.8°C; one night in ten drops to 24.2°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest December day here reached 30.9°C (2018-12-20) and the coldest night 23.1°C (2004-12-29).

Rain in December

Wet (more than 8 rainy days): about 28 days with 1 mm or more, 316 mm in total. Year to year it varies a lot - the wettest December was 1991 with 675 mm, the driest 2017 with 176 mm. Humidity averages 85%.

Sea temperature in December

The sea averages 28.4°C - warm enough to swim (22°c+). Depending on the year it ranges from 27.8°C to 29.0°C. For the warmest sea here, come in May (30.1°C).

Sunshine and daylight

Around 1.2 hours of sunshine a day (estimated from cloud cover), 11.9 hours of daylight: the sun rises about 06:58 and sets about 19:01 local time in mid-December. Average cloud cover is 90%.

Is December a good time to visit Singapore?

It is a reasonable choice: hot days but expect showers. The best months for Singapore on our scoring are July, June, March; months averaging 25°C or more: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec.

Warm days, with little relief after dark

December is Singapore's coolest month, but that is relative: average daytime highs of 27.8°C give way to night-time lows of 24.8°C. You will not need winter clothing for the outdoor temperatures, and evenings are warm rather than refreshing. Humidity is the catch, making light, loose clothing more useful than simply dressing for the thermometer reading. Leave room for breaks during the warmest part of the day rather than planning a packed outdoor schedule. Days reaching 30°C are uncommon, but that does not make this cool-weather walking territory. It suits travellers who enjoy steady warmth and do not need crisp evenings to feel comfortable.

Plan around frequent rain and limited sunshine

Rain is the main reason to hesitate over December. About 28 days receive measurable rain, so wet weather should be part of your plan rather than an occasional inconvenience. That does not mean every rainy day is a washout, but the figures do not support relying on long dry spells either. Sunshine averages just 1.2 hours within 11.9 hours of daylight: there is time to be out, but little assurance of clear skies. Carry an umbrella, favour footwear that can cope with getting wet, and keep indoor options available. Flexible plans are a better match than outdoor activities tied to a fixed time.

Warm sea, but not dependable swimming weather

The sea averages 28.4°C, so water temperature is comfortably in swimming territory. The limitation is the weather above it: frequent rain and scarce sunshine make December less suitable for a trip built around lounging by the water. Treat swimming as something to fit around conditions rather than the anchor of each day. The wider decision is similar. December works if your priority is warmth and you can accept wet, humid days; it is less convincing if you want a reliably sunny break from the UK. If your travel timing is flexible, July, June and March rate better overall, though that is not a promise of dry weather.