Julau climate — normals and trends
Julau (Malaysia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 25.7 °C and it receives 2,640 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 (26.3 °C on average) and the coldest is January (25.1 °C). Rainfall peaks in December.
Julau averages 0 frost days, 198 hot days (≥ 30 °C) and 305 rainy days per year.
Julau has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.0 °C (on 29 July 2025) and the coldest 17.6 °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
JulauSarawak
- coords
- 2.02°, 111.92°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.7°C
Average daily high
30.1°C
Average daily low
22.9°C
Annual rainfall
2,640mm
Sunshine / day
8.7h
Mean relative humidity
89%
Average peak wind
7.2km/h
Seasonal range
1.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
198 d/yr
Rainy days (≥ 1 mm)
305 d/yr
Annual snowfall
0.0 cm
Average feels-like high
36.7 °C
Average feels-like low
27.4 °C
Average peak gust
21.5 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
16.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.90 · 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
36.0 °C
29 July 2025
Coldest day
17.6 °C
16 February 1949
Wettest day
249 mm
11 January 2003
Windiest day
20.5 km/h
13 January 2003
Strongest gust
54.0 km/h
20 November 2001
Hottest feels-like
43.8 °C
13 October 2021
Coldest feels-like
19.7 °C
16 February 1949
Sunniest day
12.1 h
28 May 1949
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 | 29.5 °C | +0.4 °C | 450 mm | +193 mm |
| Feb | 30.0 °C | +0.5 °C | 280 mm | +66 mm |
| Mar | 30.7 °C | +0.6 °C | 418 mm | +189 mm |
| Apr | 31.3 °C | +0.9 °C | 258 mm | +33 mm |
| May | 32.1 °C | +1.4 °C | 165 mm | -37 mm |
| Jun | 32.0 °C | +1.3 °C | 106 mm | -53 mm |
| Jul | 32.7 °C | +2.1 °C | 80 mm | -71 mm |
| Aug | 30.7 °C | +0.1 °C | 155 mm | -28 mm |
| Sep | 31.1 °C | +0.9 °C | 240 mm | +4 mm |
| Oct | 31.4 °C | +1.4 °C | 278 mm | +27 mm |
| Nov | 31.3 °C | +1.5 °C | 188 mm | -73 mm |
| Dec | 30.5 °C | +1.1 °C | 276 mm | +3 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 Julau?
Julau has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 25.7 °C and it receives 2,640 mm of precipitation per year.
What is the hottest day ever recorded in Julau?
The hottest day measured in Julau between 1940 and 2025 was 29 July 2025, reaching 36.0 °C.
What is the coldest day in Julau?
The coldest day measured in Julau between 1940 and 2025 was 16 February 1949, at 17.6 °C.
Does it snow in Julau?
Almost never: Julau sees virtually no snow, with about 0 frost days per year.
Has the climate of Julau warmed?
Yes: Julau warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Julau?
The wettest day measured in Julau between 1940 and 2025 was 11 January 2003, with 249 mm of rain in 24 hours.
What was the windiest day in Julau?
The windiest day measured in Julau between 1940 and 2025 was 13 January 2003, with winds reaching 20.5 km/h.
What is the warmest month in Julau?
The warmest month in Julau is May (26.3 °C on average); the coldest is January (25.1 °C).
How much does it rain in Julau?
Julau receives on average 2,640 mm of precipitation per year, spread over about 305 rainy days.
Is it sunny in Julau?
Julau gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
Are there tropical nights in Julau?
Yes: Julau has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Julau?
In Julau, between 1940 and 2025, the highest apparent temperature reached 43.8 °C on 13 October 2021, and the lowest was 19.7 °C on 16 February 1949.
Compare Julau with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Julau