Singapore weather: heat, rain and the monsoon seasons
Heat and humidity all year, rain in any month, and the seasons the Met Service names.
By the Local SIM Singapore team, checked October 2, 2026
The short answer
Singapore is hot and humid all year, and rain falls in every month: the Meteorological Service Singapore records an average of 171 rain days a year. Two monsoon seasons shape the calendar, the Northeast Monsoon from December to early March and the Southwest Monsoon from June to September. The heavier rain falls from November to January.
- Temperatures: nights usually 23 to 25 degrees, afternoons 31 to 33; May is the warmest month and December and January the coolest.
- Humidity: a mean around 82 per cent all year, above 90 per cent in the mornings before sunrise.
- Rain: an average of 171 rain days a year, in every month; heaviest from November to January, driest in February.
- Northeast Monsoon: December to early March, wet in its first half and relatively dry from late January.
- Southwest Monsoon: June to September, with squalls before dawn and midday and short afternoon showers; the inter-monsoon months bring afternoon and evening thunderstorms.
Checked October 2, 2026
The seasons, as the Met Service describes them
Northeast Monsoon
- When
- December to early March
- What it brings
- Wet phase first, with long spells of rain; windier and relatively dry from late January to early March
Inter-monsoon
- When
- Late March to May
- What it brings
- Hot afternoons above 32 degrees, with afternoon and evening thunderstorms
Southwest Monsoon
- When
- June to September
- What it brings
- Sumatra squalls before dawn and midday, and short afternoon showers
Inter-monsoon
- When
- October to November
- What it brings
- Thunderstorms in the afternoon and evening, generally wetter than the spring inter-monsoon
What it means on the ground
The wet phase
The Northeast Monsoon opens with monsoon surges: widespread, continuous rain, at times with strong winds, usually from December to early January.
February, the driest month
In the monsoon's dry phase the rain-belt sits further south, and February is the driest month of the year, though not a promise of clear days.
Plan around the rain
Rain falls most often in the afternoons, so mornings are the easier window outdoors; the when-to-visit guide weighs the seasons against each other.
The bottom line
30 days · 10 GB · US$11.88
Plan the outdoor hours for the morning, keep an umbrella in the bag, and let the afternoon shower pass: the heat comes straight back.
Buy on VietSIMQuestions
What is the Singapore weather like?
Hot and humid all year, with rain in every month and an average of 171 rain days a year. Two monsoons shape the calendar, the Northeast from December to early March and the Southwest from June to September, with inter-monsoon months between.
When does it rain in Singapore?
In every month. The heaviest rain falls from November to January, February is the driest month, and afternoons see rain more often than mornings.
Does Singapore have a rainy season?
Not in the way many tropical places do: the Met Service says there is no distinct wet or dry season, only monthly variation, with November to January the wettest stretch.
Sources
Where the facts on this page come from.
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