Simunjan climate — normals and trends
Simunjan (Malaysia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.5 °C and it receives 3,072 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 (27.2 °C on average) and the coldest is January (25.8 °C). Rainfall peaks in December.
Simunjan averages 0 frost days, 247 hot days (≥ 30 °C) and 313 rainy days per year.
Simunjan has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.7 °C (on 16 August 2006) and the coldest 19.3 °C (on 16 February 1949).
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
SimunjanSarawak
- coords
- 1.38°, 110.75°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.5°C
Average daily high
30.7°C
Average daily low
23.8°C
Annual rainfall
3,072mm
Sunshine / day
9.5h
Mean relative humidity
86%
Average peak wind
9.9km/h
Seasonal range
1.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
247 d/yr
Rainy days (≥ 1 mm)
313 d/yr
Annual snowfall
0.0 cm
Average feels-like high
37.4 °C
Average feels-like low
28.7 °C
Average peak gust
24.7 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
18.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.86 · 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
36.7 °C
16 August 2006
Coldest day
19.3 °C
16 February 1949
Wettest day
301 mm
5 January 2012
Windiest day
25.5 km/h
21 February 1955
Strongest gust
54.7 km/h
27 December 1973
Hottest feels-like
44.9 °C
3 July 2019
Coldest feels-like
21.8 °C
16 February 1949
Sunniest day
11.9 h
3 June 1944
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 29.8 °C | +0.5 °C | 706 mm | +374 mm |
| Feb | 30.0 °C | +0.4 °C | 350 mm | +95 mm |
| Mar | 30.9 °C | +0.4 °C | 370 mm | +113 mm |
| Apr | 32.1 °C | +0.9 °C | 260 mm | +12 mm |
| May | 32.6 °C | +1.0 °C | 273 mm | +45 mm |
| Jun | 32.6 °C | +1.1 °C | 140 mm | -34 mm |
| Jul | 33.5 °C | +2.0 °C | 61 mm | -106 mm |
| Aug | 31.7 °C | +0.3 °C | 157 mm | -47 mm |
| Sep | 31.8 °C | +0.7 °C | 266 mm | +3 mm |
| Oct | 32.1 °C | +1.3 °C | 161 mm | -135 mm |
| Nov | 31.9 °C | +1.4 °C | 305 mm | -1 mm |
| Dec | 30.8 °C | +0.9 °C | 410 mm | +68 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 Simunjan?
Simunjan has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.5 °C and it receives 3,072 mm of precipitation per year.
What is the hottest day ever recorded in Simunjan?
The hottest day measured in Simunjan between 1940 and 2025 was 16 August 2006, reaching 36.7 °C.
What is the coldest day in Simunjan?
The coldest day measured in Simunjan between 1940 and 2025 was 16 February 1949, at 19.3 °C.
Does it snow in Simunjan?
Almost never: Simunjan sees virtually no snow, with about 0 frost days per year.
Has the climate of Simunjan warmed?
Yes: Simunjan warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Simunjan?
The wettest day measured in Simunjan between 1940 and 2025 was 5 January 2012, with 301 mm of rain in 24 hours.
What was the windiest day in Simunjan?
The windiest day measured in Simunjan between 1940 and 2025 was 21 February 1955, with winds reaching 25.5 km/h.
What is the warmest month in Simunjan?
The warmest month in Simunjan is May (27.2 °C on average); the coldest is January (25.8 °C).
How much does it rain in Simunjan?
Simunjan receives on average 3,072 mm of precipitation per year, spread over about 313 rainy days.
Is it sunny in Simunjan?
Simunjan gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.
Are there tropical nights in Simunjan?
Yes: Simunjan has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Simunjan?
In Simunjan, between 1940 and 2025, the highest apparent temperature reached 44.9 °C on 3 July 2019, and the lowest was 21.8 °C on 16 February 1949.
Compare Simunjan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Simunjan