Climate of Singapore

Changi Climate Station, 1991-2020 · Meteorological Service Singapore

27.8°C

Annual mean temperature

2,113.3 mm

Annual rainfall

82.2%

Mean relative humidity

171

Rain days per year

Singapore has a tropical rainforest climate. Temperatures stay in a narrow band all year. What changes is rain type, wind and lightning. The Northeast Monsoon (December to early March) is wet then dry. The Southwest Monsoon (June to September) is drier, with morning Sumatra squalls and haze risk. The two inter-monsoon windows bring the most lightning and some of the hottest afternoons.

Grey monsoon rain over tropical public housing
Northeast monsoon rain is often widespread and persistent. That is a different day from a 30-minute afternoon storm.

Singapore weather year

Four phases, not four seasons. Temperature barely moves. Rain type does.

Northeast monsoon Inter-monsoon Southwest monsoon

Monthly rainfall at Changi

1991-2020 normals. December is more than three times as wet as February.

Values in millimetres. Source: Meteorological Service Singapore.

Weather by month

Monthly climate table

Month Rain mm Rain days Max °C Min °C Mean °C RH % Wind m/s Thunder Lightning
January 221.6 13 30.6 24.3 26.8 83.5 2.6 6 7
February 105.1 9 31.5 24.6 27.3 81.2 2.8 5 4
March 151.7 12 32.2 24.9 27.8 81.7 2.2 12 13
April 164.3 15 32.4 25.3 28.2 82.6 1.6 20 21
May 164.3 15 32.3 25.7 28.6 82.3 1.7 19 21
June 135.3 13 31.9 25.7 28.5 80.9 2 15 16
July 146.6 14 31.4 25.4 28.2 80.9 2.4 13 13
August 146.9 14 31.4 25.3 28.1 80.7 2.5 13 12
September 124.9 13 31.6 25.2 28 80.7 2.1 14 12
October 168.3 15 31.8 25 27.9 81.5 1.6 17 18
November 252.3 19 31.2 24.6 27.2 84.9 1.4 19 22
December 331.9 19 30.5 24.3 26.8 85.5 1.9 14 16

Source: Meteorological Service Singapore, Climate of Singapore. A rain day is 0.2 mm or more. Thunder and lightning days are monthly means.

Highlights

Hottest month

May

28.6°C mean

Coolest month

January

26.8°C mean

Wettest month

December

331.9 mm

Driest month

February

105.1 mm

Northeast Monsoon guide Southwest Monsoon & squalls Weather history & records