Singapore weather: Afternoon thundery showers for first half of December

Singapore weather: Afternoon thundery showers for first half of December

Daily temperature range between 24°C and 33°C.

Singapore Editorial Team

Updated

Mon, December 1, 2025 at 8:40 AM UTC

3 min read

Thundery showers on most afternoons are expected in the first fortnight of December. (Photo: ROSLAN RAHMAN/AFP via Getty Images)

SINGAPORE — Moderate to heavy thundery showers are expected over Singapore in the afternoon during the first half of December, according to forecasts by the Meteorological Service Singapore (MSS) on Monday (1 Dec).

These thundery showers may extend into the evening on a “few of these days”, the weatherman said.

“During the fortnight, the daily temperature will likely range between 24°C and 33°C on most days,” said MSS. “Although thundery showers are expected on most days, the daily maximum temperature may reach around 34°C on a few days.”

Total rainfall during this fortnight period is expected to be near average over most parts of Singapore.

Singapore’s climate in review (17-30 November)

Inter-monsoon conditions prevailed over Singapore for the last half of November with thundery showers falling on most days while Sumatra squalls also brought gusty winds over the island on some nights.

“On 17 November 2025, regional convergence of winds brought heavy thundery showers over many areas of Singapore in the afternoon,” noted MSS. “The daily total rainfall of 70.4mm recorded at Clementi that day was the highest rainfall recorded for the second fortnight of November 2025.”

According to MSS, the daily maximum temperatures in the second fortnight of November were between 32°C and 34°C on most days.

Paya Lebar recorded the highest daily maximum temperature of 35.2°C on 29 November.

Singapore’s climate at a glance

Singapore, located just north of the equator, experiences a tropical rainforest climate characterised by consistent warmth, high humidity, and abundant rainfall throughout the year. The nation's climate is influenced by its maritime exposure and equatorial location, leading to minimal temperature variation across months.

Seasons and monsoons

Singapore's climate is defined by two primary monsoon seasons, each bringing distinct weather patterns:

Northeast Monsoon (December to early March)

Early Phase (December to January): Characterised by monsoon surges, leading to widespread moderate to heavy rainfall and occasional wind speeds of 25–35km/h.
Late Phase (February to early March): Typically drier and windier, with reduced rainfall.

Southwest Monsoon (June to September):

Dominated by southeasterly to southerly winds.
Frequent "Sumatra squalls" occur during the pre-dawn and morning hours, bringing gusty winds and short-duration thundery showers.

Between these monsoons are inter-monsoon periods (April to May and October to November), marked by light and variable winds, intense afternoon thunderstorms, and higher temperatures.

Rainfall

Rainfall in Singapore is abundant and well-distributed throughout the year, with no distinct dry season. The average annual rainfall is approximately 2,340 mm. However, rainfall can vary regionally; the western parts often receive more rain than the eastern areas due to the rain shadow effect.

Temperature

Temperatures in Singapore are consistently warm:

Daytime highs: Typically range between 31°C and 33°C.
Nighttime lows: Generally fall between 24°C and 26°C.
Record highs: The highest recorded temperature is 37°C, observed in April 1983 and May 2023.
Record lows: The lowest recorded temperature is 19.4°C, noted in January 1934.

Humidity

Relative humidity in Singapore is high year-round, often exceeding 90 per cent in the early morning and dropping to around 60 per cent in the mid-afternoon on dry days. During periods of rain, humidity can reach 100 per cent.

Sunshine duration and cloud cover

Singapore receives an average of 1,800 to 2,000 hours of sunshine annually. Despite its tropical location, the country experiences significant cloud cover, especially during the monsoon seasons, which can limit sunshine duration.

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