Inter-monsoon

April weather in Singapore

Light winds, hot afternoons, and frequent severe thunderstorms. One of the most lightning-active months.

March May

Mean temperature

28.2°C

25.3 to 32.4°C

Rainfall

164.3 mm

15 rain days

Humidity / wind

82.6%

1.6 m/s mean wind

Thunder / lightning

20 / 21

days in a typical month

Compared with the year

  • Rain vs annual monthly share8%
  • Hottest month of the yearMay (28.6°C)
  • Wettest month of the yearDecember (331.9 mm)
  • Driest month of the yearFebruary (105.1 mm)

Normals from Changi Climate Station, 1991-2020.

What to check this month

2-hour nowcast Lightning Heat stress
Afternoon thunderstorm cloud over a tropical city
Inter-monsoon storms grow in place on hot, still afternoons.

What April actually feels like

  • Light winds, hot afternoons, frequent severe thunderstorms. Classic inter-monsoon.
  • Schools and outdoor events should watch the 2-hour nowcast after lunch, not just the morning forecast.
  • Flash floods happen when a cell stalls. Radar beats a 24-hour forecast for that call.

Monthly rainfall at Changi

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

Values in millimetres. Source: Meteorological Service Singapore.

All months

January February March April May June July August September October November December