Weather in Singapore in January

Shoulder season. January sits in between. You will get good days and you will lose some. You should expect rain on 19 days of the month, which is more days wet than dry.

Singapore barely has seasons. January scores 51 out of 100 against a best of 61 in February — a gap small enough that the month you choose matters far less here than the week you choose.

Rain on 19 days, 6 of them heavy. Enough to need a plan B, not enough to need a plan around it. Natural fibres and a second shirt for the day. At 88% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: the day barely swings — 4.3 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest January day reached 31.1 °C and the coldest night fell to 21.5 °C, and the wettest single day dropped 154 mm — roughly 66% of the month's rain in one day.

January is moderately variable: 43 mm in the driest year against 586 mm in the wettest, around an average of 235 mm. Roughly two Januarys in three land near that average, and the third does something else entirely.

Wind is light at 9.4 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 88% is the real story though — it is the number that decides how the day feels, not the 28.5 °C.

How January sits in the year

Temperatures hold steady either side: 28.4 °C in December, 28.5 here, 29.2 in February. Nothing about the timing within the month matters much. Rain is the thing that moves: February brings 7 days less of it, so pushing the dates later buys drier weather.

Daylight in January

Singapore sits close enough to the equator that daylight barely moves all year — 12.1 hours in January, against a range of just 0.2 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 27.5 °C in January — warm enough that the water offers no relief from the heat. The sea peaks at 30.1 °C in May and bottoms out at 27.4 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

January in Singapore versus nearby

If Singapore is one option among several, the nearby comparison is worth making. Pekanbaru is close enough to be a coin toss — within a degree on temperature, 3 days more rain. Kuantan is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: January works, with February the better month by 10 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Singapore

See all twelve months in Singapore, or where else to go in January.