Tanjung Balai climate — normals and trends
Tanjung Balai (Indonesia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 27.0 °C and it receives 2,274 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 June (27.8 °C on average) and the coldest is January (26.1 °C). Rainfall peaks in November.
Tanjung Balai averages 0 frost days, 2 hot days (≥ 30 °C) and 272 rainy days per year.
Tanjung Balai has warmed by +0.9 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The hottest day of the period reached 30.9 °C (on 13 May 2023) and the coldest 23.7 °C (on 25 February 2001).
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
Tanjung BalaiRiau Islands
- coords
- 1.00°, 103.42°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.0°C
Average daily high
28.0°C
Average daily low
26.0°C
Annual rainfall
2,274mm
Sunshine / day
10.3h
Mean relative humidity
81%
Average peak wind
20.8km/h
Seasonal range
1.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
272 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.7 °C
Average feels-like low
29.4 °C
Average peak gust
29.6 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
19.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.9 °C
since 1940
+0.1 °C per decade · r² = 0.64 · 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
30.9 °C
13 May 2023
Coldest day
23.7 °C
25 February 2001
Wettest day
197 mm
28 November 1956
Windiest day
50.4 km/h
4 March 2023
Strongest gust
65.5 km/h
4 March 2023
Hottest feels-like
37.9 °C
25 May 1998
Coldest feels-like
23.2 °C
12 February 1943
Sunniest day
12.0 h
3 May 1940
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 | 27.3 °C | +0.2 °C | 508 mm | +344 mm |
| Feb | 27.6 °C | +0.2 °C | 133 mm | +32 mm |
| Mar | 28.1 °C | +0.3 °C | 395 mm | +245 mm |
| Apr | 28.6 °C | +0.2 °C | 361 mm | +167 mm |
| May | 29.5 °C | +0.8 °C | 200 mm | -13 mm |
| Jun | 29.5 °C | +0.8 °C | 126 mm | -45 mm |
| Jul | 29.3 °C | +0.9 °C | 93 mm | -76 mm |
| Aug | 28.9 °C | +0.7 °C | 240 mm | +69 mm |
| Sep | 28.7 °C | +0.6 °C | 135 mm | -38 mm |
| Oct | 28.9 °C | +0.8 °C | 127 mm | -90 mm |
| Nov | 28.7 °C | +1.0 °C | 267 mm | -19 mm |
| Dec | 27.9 °C | +0.7 °C | 295 mm | +29 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 Tanjung Balai?
Tanjung Balai has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 27.0 °C and it receives 2,274 mm of precipitation per year.
What is the hottest day ever recorded in Tanjung Balai?
The hottest day measured in Tanjung Balai between 1940 and 2025 was 13 May 2023, reaching 30.9 °C.
What is the coldest day in Tanjung Balai?
The coldest day measured in Tanjung Balai between 1940 and 2025 was 25 February 2001, at 23.7 °C.
Does it snow in Tanjung Balai?
Almost never: Tanjung Balai sees virtually no snow, with about 0 frost days per year.
Has the climate of Tanjung Balai warmed?
Yes: Tanjung Balai warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tanjung Balai?
The wettest day measured in Tanjung Balai between 1940 and 2025 was 28 November 1956, with 197 mm of rain in 24 hours.
What was the windiest day in Tanjung Balai?
The windiest day measured in Tanjung Balai between 1940 and 2025 was 4 March 2023, with winds reaching 50.4 km/h.
What is the warmest month in Tanjung Balai?
The warmest month in Tanjung Balai is June (27.8 °C on average); the coldest is January (26.1 °C).
How much does it rain in Tanjung Balai?
Tanjung Balai receives on average 2,274 mm of precipitation per year, spread over about 272 rainy days.
Is it sunny in Tanjung Balai?
Tanjung Balai gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.
Are there tropical nights in Tanjung Balai?
Yes: Tanjung Balai has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Tanjung Balai?
In Tanjung Balai, between 1940 and 2025, the highest apparent temperature reached 37.9 °C on 25 May 1998, and the lowest was 23.2 °C on 12 February 1943.
Compare Tanjung Balai with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Tanjung Balai