Thomson climate — normals and trends
Thomson (Singapore) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.9 °C and it receives 2,098 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is June (27.7 °C on average) and the coldest is January (25.9 °C). Rainfall peaks in November.
Thomson averages 0 frost days, 1 hot days (≥ 30 °C) and 274 rainy days per year.
Thomson has warmed by +0.9 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The hottest day of the period reached 30.9 °C (on 26 May 2025) and the coldest 23.3 °C (on 14 January 1965).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Thomson
- coords
- 1.35°, 103.84°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.9°C
Average daily high
27.9°C
Average daily low
25.9°C
Annual rainfall
2,098mm
Sunshine / day
10.4h
Mean relative humidity
82%
Average peak wind
19.0km/h
Seasonal range
1.8°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
274 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.7 °C
Average feels-like low
29.4 °C
Average peak gust
28.0 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
18.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.9 °C
since 1940
+0.1 °C per decade · r² = 0.62 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
30.9 °C
26 May 2025
Coldest day
23.3 °C
14 January 1965
Wettest day
236 mm
7 December 1991
Windiest day
47.4 km/h
16 January 1951
Strongest gust
63.0 km/h
16 January 1951
Hottest feels-like
38.4 °C
26 April 1998
Coldest feels-like
23.4 °C
6 January 1974
Sunniest day
12.0 h
18 April 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 27.2 °C | +0.1 °C | 424 mm | +281 mm |
| Feb | 27.8 °C | +0.3 °C | 95 mm | +3 mm |
| Mar | 28.1 °C | +0.2 °C | 338 mm | +210 mm |
| Apr | 28.4 °C | +0.1 °C | 237 mm | +66 mm |
| May | 29.4 °C | +0.8 °C | 190 mm | -17 mm |
| Jun | 29.4 °C | +0.8 °C | 127 mm | -49 mm |
| Jul | 29.1 °C | +0.9 °C | 93 mm | -84 mm |
| Aug | 28.7 °C | +0.6 °C | 201 mm | +25 mm |
| Sep | 28.5 °C | +0.5 °C | 171 mm | +5 mm |
| Oct | 28.8 °C | +0.9 °C | 135 mm | -66 mm |
| Nov | 28.7 °C | +1.1 °C | 283 mm | +41 mm |
| Dec | 27.9 °C | +0.7 °C | 354 mm | +136 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Thomson?
Thomson has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.9 °C and it receives 2,098 mm of precipitation per year.
What is the hottest day ever recorded in Thomson?
The hottest day measured in Thomson between 1940 and 2025 was 26 May 2025, reaching 30.9 °C.
What is the coldest day in Thomson?
The coldest day measured in Thomson between 1940 and 2025 was 14 January 1965, at 23.3 °C.
Does it snow in Thomson?
Almost never: Thomson sees virtually no snow, with about 0 frost days per year.
Has the climate of Thomson warmed?
Yes: Thomson warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Thomson?
The wettest day measured in Thomson between 1940 and 2025 was 7 December 1991, with 236 mm of rain in 24 hours.
What was the windiest day in Thomson?
The windiest day measured in Thomson between 1940 and 2025 was 16 January 1951, with winds reaching 47.4 km/h.
What is the warmest month in Thomson?
The warmest month in Thomson is June (27.7 °C on average); the coldest is January (25.9 °C).
How much does it rain in Thomson?
Thomson receives on average 2,098 mm of precipitation per year, spread over about 274 rainy days.
Is it sunny in Thomson?
Thomson gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.
Are there tropical nights in Thomson?
Yes: Thomson has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Thomson?
In Thomson, between 1940 and 2025, the highest apparent temperature reached 38.4 °C on 26 April 1998, and the lowest was 23.4 °C on 6 January 1974.
Compare Thomson with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Thomson