Banjarbaru in Summer
In summer (December, January and February), Banjarbaru sees average daytime highs around 30°C and overnight lows near 24°C, with 994 mm of rain over about 84 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 30°C. The sky is clear or mostly clear about 0% of the time across summer, and the air most often feels miserable.
Summer is Banjarbaru's weakest season of the year to visit on our travel score. Banjarbaru has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Banjarbaru's year-round climate.
- Avg daytime high
- 30°C
- coldest season of the year
- Avg overnight low
- 24°C
- Rainfall
- 994 mm
- 84 wet days
- Avg wind
- 6 km/h
- Travel score
- 2.6
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Banjarbaru in Summer
Across summer, daytime highs hold fairly steady around 30°C.
A typical summer day in Banjarbaru reaches about 30°C and drops to 24°C overnight. The warmest of the three months is February, the coolest December.
How summer really feels in Banjarbaru
Once humidity and wind are folded in, summer brings about 90 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Banjarbaru weather by month
How the three summer months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 30° / 24° | 337 | 28.9 | 12.2 | 2.6 |
| Feb | 31° / 24° | 267 | 25.1 | 12.1 | 2.6 |
| Mar | 31° / 24° | 294 | 27.4 | 12 | 2.6 |
| Apr | 31° / 24° | 284 | 27.3 | 11.9 | 2.5 |
| May | 32° / 24° | 185 | 21.9 | 11.8 | 3.0 |
| Jun | 31° / 24° | 138 | 18.1 | 11.8 | 3.5 |
| Jul | 31° / 23° | 100 | 13.5 | 11.8 | 4.0 |
| Aug | 32° / 23° | 62 | 8.9 | 11.9 | 3.9 |
| Sep | 33° / 23° | 74 | 9 | 12 | 3.5 |
| Oct | 33° / 24° | 172 | 16.9 | 12.1 | 2.9 |
| Nov | 31° / 24° | 304 | 27 | 12.2 | 2.4 |
| Dec | 30° / 24° | 390 | 29.7 | 12.2 | 2.5 |
Cloud cover in Summer
The sky is clear or mostly clear about 0% of the time across summer.
Chance of precipitation in Summer
Banjarbaru gets around 994 mm of rain over 84 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 6 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 12 min in early December to 12 h 06 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 4.4 kWh/m².
Is summer a good time to visit Banjarbaru?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Banjarbaru.
What to pack for Banjarbaru in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Banjarbaru sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 84 days see rain.
Sea temperature near Banjarbaru in Summer
The nearest coast averages about 29°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 31 km away) is warmest in April at about 30°C and coldest in August near 28°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 29 | 29 | 30 | 30 | 30 | 29 | 28 | 28 | 28 | 29 | 30 | 29 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 29 | Tropical |
| Feb | 29 | Tropical |
| Mar | 30 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 29 | Tropical |
| Jul | 28 | Tropical |
| Aug | 28 | Tropical |
| Sep | 28 | Tropical |
| Oct | 29 | Tropical |
| Nov | 30 | Tropical |
| Dec | 29 | Tropical |
UV index in Banjarbaru in Summer
Clear-sky midday UV across summer averages around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Banjarbaru peaks around February 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (extreme).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 15 | 14 | 14 | 12 | 10 | 10 | 12 | 13 | 13 | 13 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 15 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 10 | Extreme |
| Jul | 10 | Extreme |
| Aug | 12 | Extreme |
| Sep | 13 | Extreme |
| Oct | 13 | Extreme |
| Nov | 13 | Extreme |
| Dec | 12 | Extreme |
Air quality in Banjarbaru in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Banjarbaru is worst in September — around 29 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (January, 12 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 12 | 13 | 14 | 13 | 13 | 14 | 14 | 17 | 29 | 29 | 20 | 13 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 12 | Good |
| Feb | 13 | Moderate |
| Mar | 14 | Moderate |
| Apr | 13 | Moderate |
| May | 13 | Moderate |
| Jun | 14 | Moderate |
| Jul | 14 | Moderate |
| Aug | 17 | Moderate |
| Sep | 29 | Moderate |
| Oct | 29 | Moderate |
| Nov | 20 | Moderate |
| Dec | 13 | Moderate |
Where is Banjarbaru?
Banjarbaru sits at 3.4°S, 114.8°E, 28 m above sea level, in Indonesia. The nearest listed city is Martapura, 5.0 km away.
Topography around Banjarbaru
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Banjarbaru.
Within 3 km, the terrain around Banjarbaru has only modest variations in elevation — a maximum elevation change of 58 m around an average of 26 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 458 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,369 m.
The land around Banjarbaru is covered by artificial surfaces (57%) and trees (36%) within 3 km, trees (50%) and grassland (21%) within 16 km, and trees (55%) and water (20%) within 80 km.
Indonesia travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 29% of US
- price level, 2025
- GDP per capita
- $5,060
- 2025
- Happiness
- 5.6 / 10
- World Happiness, 2025
- Safe drinking water
- 30%
- of population, 2024
- Homicide rate
- 0.3
- per 100k, 2022
- Road deaths
- 11.3
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 471
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Banjarbaru (-3.4406°, 114.8365°, elevation 28 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.