Mersing climate — normals and trends
Mersing has a tropical rainforest climate, averaging 26.4 °C annually with 2,303 mm of rain per year.
Climate normals · ERA5
MersingJohor
- coords
- 2.43°, 103.84°
- period
- 1940–2025 · 86 yrs
The normals for this period
The average of every indicator across the whole window: temperature, water, sky, wind and notable days.
Mean daily temperature
26.4°C
Average daily high
29.1°C
Average daily low
24.6°C
Annual rainfall
2,303mm
Sunshine / day
10.4h
Mean relative humidity
86%
Average peak wind
13.9km/h
Seasonal range
1.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
104 d/yr
Rainy days (≥ 1 mm)
299 d/yr
Annual snowfall
0.0 cm
Average feels-like high
34.8 °C
Average feels-like low
28.9 °C
Average peak gust
26.8 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
18.7 MJ/m²
Has the climate changed?
What the yearly averages say about warming here, and whether the slope is statistically solid.
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.81 · 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).
Climate month by month
How an average year unfolds: when it rains, when it turns hot, when the sun is out.
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
The most extreme days ever measured here, then the year-by-year detail.
Hottest day
33.3 °C
30 April 1971
Coldest day
21.4 °C
14 February 1941
Wettest day
340 mm
8 December 1987
Windiest day
41.1 km/h
28 December 2001
Strongest gust
71.3 km/h
28 December 2001
Hottest feels-like
42.0 °C
19 May 2020
Coldest feels-like
23.5 °C
19 January 1965
Sunniest day
12.0 h
16 April 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and compare it with the normal: warmer, drier, more extreme?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 27.9 °C | +0.5 °C | 469 mm | +228 mm |
| Feb | 28.5 °C | +0.5 °C | 171 mm | +27 mm |
| Mar | 29.1 °C | +0.2 °C | 389 mm | +228 mm |
| Apr | 30.0 °C | +0.2 °C | 294 mm | +134 mm |
| May | 31.0 °C | +0.8 °C | 250 mm | +92 mm |
| Jun | 30.7 °C | +0.6 °C | 125 mm | +6 mm |
| Jul | 30.7 °C | +1.0 °C | 86 mm | -39 mm |
| Aug | 30.2 °C | +0.6 °C | 150 mm | +8 mm |
| Sep | 30.0 °C | +0.4 °C | 155 mm | -11 mm |
| Oct | 30.7 °C | +1.3 °C | 160 mm | -55 mm |
| Nov | 29.5 °C | +1.0 °C | 323 mm | +17 mm |
| Dec | 28.5 °C | +0.9 °C | 357 mm | -10 mm |
The year's extremes
What was the weather like that day?
The weather actually measured on a given date, anywhere in the covered window.
Climate at a glance
What these normals say about the place, in a few sentences, and the notions needed to read them.
Mersing (Malaysia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.4 °C and it receives 2,303 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 (25.6 °C). Rainfall peaks in December.
Mersing averages 0 frost days, 104 hot days (≥ 30 °C) and 299 rainy days per year.
Mersing has warmed by +1.5 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The hottest day of the period reached 33.3 °C (on 30 April 1971) and the coldest 21.4 °C (on 14 February 1941).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Compare Mersing with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Mersing
Other cities — Malaysia
Frequently asked questions
What is the climate of Mersing?
Mersing has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.4 °C and it receives 2,303 mm of precipitation per year.
What is the hottest day ever recorded in Mersing?
The hottest day measured in Mersing between 1940 and 2025 was 30 April 1971, reaching 33.3 °C.
What is the coldest day in Mersing?
The coldest day measured in Mersing between 1940 and 2025 was 14 February 1941, at 21.4 °C.
Does it snow in Mersing?
Almost never: Mersing sees virtually no snow, with about 0 frost days per year.
Has the climate of Mersing warmed?
Yes: Mersing warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Mersing?
The wettest day measured in Mersing between 1940 and 2025 was 8 December 1987, with 340 mm of rain in 24 hours.
What was the windiest day in Mersing?
The windiest day measured in Mersing between 1940 and 2025 was 28 December 2001, with winds reaching 41.1 km/h.
What is the warmest month in Mersing?
The warmest month in Mersing is May (27.2 °C on average); the coldest is January (25.6 °C).
How much does it rain in Mersing?
Mersing receives on average 2,303 mm of precipitation per year, spread over about 299 rainy days.
Is it sunny in Mersing?
Mersing gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.
Are there tropical nights in Mersing?
Yes: Mersing has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Mersing?
In Mersing, between 1940 and 2025, the highest apparent temperature reached 42.0 °C on 19 May 2020, and the lowest was 23.5 °C on 19 January 1965.
These forecasts and records come from our own weather API. Developer documentation →