Bandar climate — normals and trends
Bandar (Indonesia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 24.9 °C and it receives 2,706 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 (25.6 °C on average) and the coldest is January (24.2 °C). Rainfall peaks in November.
Bandar averages 0 frost days, 193 hot days (≥ 30 °C) and 311 rainy days per year.
Bandar has warmed by +2.2 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.7 °C (on 4 August 2009) and the coldest 16.6 °C (on 3 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
BandarNorth Sumatra
- coords
- 2.05°, 99.75°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.9°C
Average daily high
30.0°C
Average daily low
21.7°C
Annual rainfall
2,706mm
Sunshine / day
9.4h
Mean relative humidity
87%
Average peak wind
6.2km/h
Seasonal range
1.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
193 d/yr
Rainy days (≥ 1 mm)
311 d/yr
Annual snowfall
0.0 cm
Average feels-like high
36.0 °C
Average feels-like low
25.5 °C
Average peak gust
24.7 km/h
Tropical nights (≥ 20 °C)
351 d/yr
Solar radiation
18.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °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
36.7 °C
4 August 2009
Coldest day
16.6 °C
3 February 1949
Wettest day
154 mm
25 December 2017
Windiest day
16.9 km/h
20 July 2025
Strongest gust
50.4 km/h
25 November 2025
Hottest feels-like
42.2 °C
10 April 1998
Coldest feels-like
16.8 °C
21 June 1940
Sunniest day
12.0 h
7 July 1959
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 | 29.1 °C | +0.1 °C | 332 mm | +127 mm |
| Feb | 30.1 °C | +0.4 °C | 240 mm | +67 mm |
| Mar | 30.6 °C | +0.4 °C | 328 mm | +109 mm |
| Apr | 30.6 °C | +0.2 °C | 280 mm | +47 mm |
| May | 31.6 °C | +0.9 °C | 185 mm | -24 mm |
| Jun | 32.5 °C | +1.5 °C | 59 mm | -77 mm |
| Jul | 33.4 °C | +2.6 °C | 70 mm | -82 mm |
| Aug | 32.2 °C | +1.5 °C | 179 mm | -17 mm |
| Sep | 30.9 °C | +0.8 °C | 209 mm | -51 mm |
| Oct | 31.2 °C | +1.5 °C | 176 mm | -128 mm |
| Nov | 29.4 °C | +0.2 °C | 359 mm | +35 mm |
| Dec | 29.0 °C | +0.1 °C | 312 mm | +17 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 Bandar?
Bandar has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 24.9 °C and it receives 2,706 mm of precipitation per year.
What is the hottest day ever recorded in Bandar?
The hottest day measured in Bandar between 1940 and 2025 was 4 August 2009, reaching 36.7 °C.
What is the coldest day in Bandar?
The coldest day measured in Bandar between 1940 and 2025 was 3 February 1949, at 16.6 °C.
Does it snow in Bandar?
Almost never: Bandar sees virtually no snow, with about 0 frost days per year.
Has the climate of Bandar warmed?
Yes: Bandar warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bandar?
The wettest day measured in Bandar between 1940 and 2025 was 25 December 2017, with 154 mm of rain in 24 hours.
What was the windiest day in Bandar?
The windiest day measured in Bandar between 1940 and 2025 was 20 July 2025, with winds reaching 16.9 km/h.
What is the warmest month in Bandar?
The warmest month in Bandar is May (25.6 °C on average); the coldest is January (24.2 °C).
How much does it rain in Bandar?
Bandar receives on average 2,706 mm of precipitation per year, spread over about 311 rainy days.
Is it sunny in Bandar?
Bandar gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.
Are there tropical nights in Bandar?
Yes: Bandar has on average 351 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bandar?
In Bandar, between 1940 and 2025, the highest apparent temperature reached 42.2 °C on 10 April 1998, and the lowest was 16.8 °C on 21 June 1940.
Compare Bandar with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bandar