Banjarmasin climate — normals and trends
Banjarmasin (Indonesia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.6 °C and it receives 2,203 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 October (27.1 °C on average) and the coldest is July (26.2 °C). Rainfall peaks in December.
Banjarmasin averages 0 frost days, 234 hot days (≥ 30 °C) and 273 rainy days per year.
Banjarmasin has warmed by +1.8 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.4 °C (on 8 October 2023) and the coldest 19.6 °C (on 1 August 1967).
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
BanjarmasinSouth Kalimantan
- coords
- -3.32°, 114.59°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.6°C
Average daily high
30.5°C
Average daily low
23.9°C
Annual rainfall
2,203mm
Sunshine / day
9.3h
Mean relative humidity
84%
Average peak wind
11.5km/h
Seasonal range
0.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
234 d/yr
Rainy days (≥ 1 mm)
273 d/yr
Annual snowfall
0.0 cm
Average feels-like high
36.4 °C
Average feels-like low
28.5 °C
Average peak gust
27.0 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
17.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.78 · 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
36.4 °C
8 October 2023
Coldest day
19.6 °C
1 August 1967
Wettest day
250 mm
7 March 2021
Windiest day
24.7 km/h
5 January 1958
Strongest gust
70.2 km/h
10 January 2013
Hottest feels-like
43.7 °C
14 October 2020
Coldest feels-like
21.6 °C
1 August 1967
Sunniest day
12.2 h
13 January 1948
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 | 30.4 °C | +0.5 °C | 370 mm | +106 mm |
| Feb | 31.4 °C | +1.2 °C | 249 mm | +7 mm |
| Mar | 31.2 °C | +0.8 °C | 294 mm | +25 mm |
| Apr | 31.1 °C | +0.4 °C | 252 mm | +36 mm |
| May | 31.8 °C | +1.0 °C | 166 mm | +6 mm |
| Jun | 31.2 °C | +0.9 °C | 124 mm | +8 mm |
| Jul | 31.4 °C | +1.3 °C | 59 mm | -34 mm |
| Aug | 31.0 °C | +0.3 °C | 117 mm | +41 mm |
| Sep | 31.4 °C | +0.1 °C | 205 mm | +110 mm |
| Oct | 31.6 °C | +0.2 °C | 205 mm | +60 mm |
| Nov | 31.0 °C | +0.3 °C | 248 mm | +21 mm |
| Dec | 30.4 °C | +0.5 °C | 316 mm | +14 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 Banjarmasin?
Banjarmasin has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.6 °C and it receives 2,203 mm of precipitation per year.
What is the hottest day ever recorded in Banjarmasin?
The hottest day measured in Banjarmasin between 1940 and 2025 was 8 October 2023, reaching 36.4 °C.
What is the coldest day in Banjarmasin?
The coldest day measured in Banjarmasin between 1940 and 2025 was 1 August 1967, at 19.6 °C.
Does it snow in Banjarmasin?
Almost never: Banjarmasin sees virtually no snow, with about 0 frost days per year.
Has the climate of Banjarmasin warmed?
Yes: Banjarmasin warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Banjarmasin?
The wettest day measured in Banjarmasin between 1940 and 2025 was 7 March 2021, with 250 mm of rain in 24 hours.
What was the windiest day in Banjarmasin?
The windiest day measured in Banjarmasin between 1940 and 2025 was 5 January 1958, with winds reaching 24.7 km/h.
What is the warmest month in Banjarmasin?
The warmest month in Banjarmasin is October (27.1 °C on average); the coldest is July (26.2 °C).
How much does it rain in Banjarmasin?
Banjarmasin receives on average 2,203 mm of precipitation per year, spread over about 273 rainy days.
Is it sunny in Banjarmasin?
Banjarmasin gets on average 9.3 hours of sunshine per day, roughly 3,395 hours per year over 1940-2025.
Are there tropical nights in Banjarmasin?
Yes: Banjarmasin has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Banjarmasin?
In Banjarmasin, between 1940 and 2025, the highest apparent temperature reached 43.7 °C on 14 October 2020, and the lowest was 21.6 °C on 1 August 1967.
Compare Banjarmasin with another city
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Nearby cities
The climate around Banjarmasin