Singapore's Weather in December

While December's weather is Singapore's coolest, the temperature averages only a couple of degrees lower than the year's hottest month. December does stand out though as the month having the highest rainfall, greatest humidity and lowest sunshine. During December, Singapore enters the Northeast Monsoon Season's most intense period.

This page gives detailed information on the typical December weather for Singapore. There are data and descriptions for temperature, rain, sun, humidity, wind and storms.

The numbers here are long-term historical averages based on climate data gathered from 1991 to 2020.

Temperature

87 °F	December average high	31 °C
76 °F	December average low	24 °C

Daytime temperatures at Singapore usually go no higher than 93 degrees Fahrenheit (34 degrees Celsius).

Nighttime temperatures only rarely get as low as 69 °F (21 °C).

Rain

13.1 in	total precipitation	332 mm
19 days	of rain

Overall, December is Singapore's rainiest month. But the total amount of rain for December has varied over the years from 30 inches (766 mm) to 2.5 inches (63 mm).

Usually the day's heaviest rainfall this time of year occurs around 5 pm.

Sun

36 %	sunshine
133 hours	of sun

December is one of Singapore's cloudiest months, with an average 4.3 hours of sun a day.

December has a total of 374 hours of daylight. The shortest days of the year, in mid December, last 12 hours and 3 minutes from sunrise to sunset.

Humidity

86 %	December average humidity

December is Singapore's most humid time of year. The relative humidity this month ranges throughout the day from an average maximum of 96 percent to an average minimum of 68 percent.

Wind

4.3 mph

December wind speed average

6.8 kph

December is an average month for wind speed at Singapore.

Storms

14 days	with thunder in December
16 days	with lightning