Sibu climate — normals and trends
Sibu (Malaysia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.0 °C and it receives 2,781 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 May (26.6 °C on average) and the coldest is January (25.3 °C). Rainfall peaks in December.
Sibu averages 0 frost days, 231 hot days (≥ 30 °C) and 307 rainy days per year.
Sibu has warmed by +1.8 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The hottest day of the period reached 37.2 °C (on 29 July 2025) and the coldest 17.8 °C (on 13 January 1972).
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
SibuSarawak
- coords
- 2.30°, 111.82°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.0°C
Average daily high
30.5°C
Average daily low
23.2°C
Annual rainfall
2,781mm
Sunshine / day
8.8h
Mean relative humidity
89%
Average peak wind
7.6km/h
Seasonal range
1.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
231 d/yr
Rainy days (≥ 1 mm)
307 d/yr
Annual snowfall
0.0 cm
Average feels-like high
37.3 °C
Average feels-like low
27.9 °C
Average peak gust
22.3 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
16.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.89 · 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
37.2 °C
29 July 2025
Coldest day
17.8 °C
13 January 1972
Wettest day
193 mm
11 January 2003
Windiest day
21.3 km/h
27 December 1973
Strongest gust
55.8 km/h
5 October 1971
Hottest feels-like
44.4 °C
13 October 2021
Coldest feels-like
19.3 °C
13 January 1972
Sunniest day
12.1 h
3 June 1941
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 | 29.6 °C | +0.2 °C | 520 mm | +244 mm |
| Feb | 30.1 °C | +0.2 °C | 303 mm | +78 mm |
| Mar | 30.9 °C | +0.4 °C | 379 mm | +148 mm |
| Apr | 31.6 °C | +0.7 °C | 228 mm | +4 mm |
| May | 32.5 °C | +1.4 °C | 131 mm | -82 mm |
| Jun | 32.4 °C | +1.4 °C | 102 mm | -62 mm |
| Jul | 33.5 °C | +2.5 °C | 60 mm | -97 mm |
| Aug | 31.5 °C | +0.6 °C | 136 mm | -53 mm |
| Sep | 31.6 °C | +1.0 °C | 220 mm | -22 mm |
| Oct | 31.9 °C | +1.5 °C | 241 mm | -29 mm |
| Nov | 31.5 °C | +1.4 °C | 233 mm | -51 mm |
| Dec | 30.7 °C | +1.0 °C | 310 mm | +5 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 Sibu?
Sibu has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.0 °C and it receives 2,781 mm of precipitation per year.
What is the hottest day ever recorded in Sibu?
The hottest day measured in Sibu between 1940 and 2025 was 29 July 2025, reaching 37.2 °C.
What is the coldest day in Sibu?
The coldest day measured in Sibu between 1940 and 2025 was 13 January 1972, at 17.8 °C.
Does it snow in Sibu?
Almost never: Sibu sees virtually no snow, with about 0 frost days per year.
Has the climate of Sibu warmed?
Yes: Sibu warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sibu?
The wettest day measured in Sibu between 1940 and 2025 was 11 January 2003, with 193 mm of rain in 24 hours.
What was the windiest day in Sibu?
The windiest day measured in Sibu between 1940 and 2025 was 27 December 1973, with winds reaching 21.3 km/h.
What is the warmest month in Sibu?
The warmest month in Sibu is May (26.6 °C on average); the coldest is January (25.3 °C).
How much does it rain in Sibu?
Sibu receives on average 2,781 mm of precipitation per year, spread over about 307 rainy days.
Is it sunny in Sibu?
Sibu gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
Are there tropical nights in Sibu?
Yes: Sibu has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sibu?
In Sibu, between 1940 and 2025, the highest apparent temperature reached 44.4 °C on 13 October 2021, and the lowest was 19.3 °C on 13 January 1972.
Compare Sibu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sibu