Southwest Monsoon

June weather in Singapore

Drier overall. Watch for predawn Sumatra squalls and the start of the traditional regional haze window.

May July

Mean temperature

28.5°C

25.7 to 31.9°C

Rainfall

135.3 mm

13 rain days

Humidity / wind

80.9%

2 m/s mean wind

Thunder / lightning

15 / 16

days in a typical month

Compared with the year

  • Rain vs annual monthly share6%
  • 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

240 km radar Haze situation Air quality
Dark squall line approaching a tropical coast
A Sumatra squall is a line, not a blob. It usually arrives from the west.

What June actually feels like

  • Open the 240 km radar before dawn. Sumatra squalls often arrive in the early morning.
  • Haze season traditionally starts. Watch 1-hour PM2.5 before the 24-hour PSI moves.
  • Drier overall than April or May, so a fair morning can still end in a short storm.

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