Barus climate — normals and trends
Barus (Indonesia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 24.3 °C and it receives 3,678 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 (25.0 °C on average) and the coldest is October (23.9 °C). Rainfall peaks in November.
Barus averages 0 frost days, 2 hot days (≥ 30 °C) and 307 rainy days per year.
Barus has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The hottest day of the period reached 31.9 °C (on 20 May 1998) and the coldest 19.8 °C (on 30 January 1946).
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
BarusNorth Sumatra
- coords
- 2.01°, 98.40°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.3°C
Average daily high
27.2°C
Average daily low
22.4°C
Annual rainfall
3,678mm
Sunshine / day
9.4h
Mean relative humidity
85%
Average peak wind
9.1km/h
Seasonal range
1.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
307 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.6 °C
Average feels-like low
25.9 °C
Average peak gust
24.5 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
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.88 · 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
31.9 °C
20 May 1998
Coldest day
19.8 °C
30 January 1946
Wettest day
325 mm
11 February 1977
Windiest day
27.7 km/h
25 November 2025
Strongest gust
62.6 km/h
25 November 2025
Hottest feels-like
38.8 °C
7 March 2016
Coldest feels-like
20.9 °C
16 September 1944
Sunniest day
12.1 h
1 July 1972
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 | 27.7 °C | +0.6 °C | 353 mm | +41 mm |
| Feb | 28.3 °C | +0.8 °C | 232 mm | -63 mm |
| Mar | 27.9 °C | +0.4 °C | 550 mm | +192 mm |
| Apr | 28.1 °C | +0.6 °C | 379 mm | +12 mm |
| May | 28.8 °C | +1.0 °C | 111 mm | -128 mm |
| Jun | 28.9 °C | +1.2 °C | 126 mm | -20 mm |
| Jul | 28.1 °C | +0.8 °C | 138 mm | -39 mm |
| Aug | 28.0 °C | +1.0 °C | 261 mm | +25 mm |
| Sep | 27.5 °C | +0.8 °C | 178 mm | -121 mm |
| Oct | 27.8 °C | +1.2 °C | 276 mm | -118 mm |
| Nov | 26.4 °C | -0.1 °C | 769 mm | +319 mm |
| Dec | 26.9 °C | +0.3 °C | 509 mm | +103 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 Barus?
Barus has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 24.3 °C and it receives 3,678 mm of precipitation per year.
What is the hottest day ever recorded in Barus?
The hottest day measured in Barus between 1940 and 2025 was 20 May 1998, reaching 31.9 °C.
What is the coldest day in Barus?
The coldest day measured in Barus between 1940 and 2025 was 30 January 1946, at 19.8 °C.
Does it snow in Barus?
Almost never: Barus sees virtually no snow, with about 0 frost days per year.
Has the climate of Barus warmed?
Yes: Barus warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Barus?
The wettest day measured in Barus between 1940 and 2025 was 11 February 1977, with 325 mm of rain in 24 hours.
What was the windiest day in Barus?
The windiest day measured in Barus between 1940 and 2025 was 25 November 2025, with winds reaching 27.7 km/h.
What is the warmest month in Barus?
The warmest month in Barus is May (25.0 °C on average); the coldest is October (23.9 °C).
How much does it rain in Barus?
Barus receives on average 3,678 mm of precipitation per year, spread over about 307 rainy days.
Is it sunny in Barus?
Barus gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.
Are there tropical nights in Barus?
Yes: Barus has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Barus?
In Barus, between 1940 and 2025, the highest apparent temperature reached 38.8 °C on 7 March 2016, and the lowest was 20.9 °C on 16 September 1944.
Compare Barus with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Barus