Bontang in Winter
In winter (December, January and February), Bontang sees average daytime highs around 29°C and overnight lows near 25°C, with 614 mm of rain over about 76 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Across winter, daytime highs hold fairly steady around 29°C. The sky is clear or mostly clear about 3% of the time across winter, and the air most often feels oppressive.
Winter is Bontang's 3rd-best season to visit on our travel score. Bontang 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 Bontang's year-round climate.
- Avg daytime high
- 29°C
- 3rd-warmest season
- Avg overnight low
- 25°C
- Rainfall
- 614 mm
- 76 wet days
- Avg wind
- 8 km/h
- Travel score
- 3.3
- 3rd-best season
- Months
- Dec · Jan · Feb
Temperature in Bontang in Winter
Across winter, daytime highs hold fairly steady around 29°C.
A typical winter day in Bontang reaches about 29°C and drops to 25°C overnight. The warmest of the three months is February, the coolest January.
How winter really feels in Bontang
Once humidity and wind are folded in, winter brings about 90 days that feel above 32°C and 0 that feel at or below 0°C.
The story in winter is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Bontang weather by month
How the three winter 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 | 29° / 25° | 203 | 25.1 | 12 | 3.4 |
| Feb | 29° / 25° | 163 | 21.9 | 12 | 3.5 |
| Mar | 29° / 25° | 206 | 25.3 | 12 | 3.4 |
| Apr | 29° / 25° | 214 | 26.5 | 12 | 3.1 |
| May | 29° / 25° | 197 | 27 | 12 | 3.2 |
| Jun | 29° / 25° | 177 | 24.8 | 12 | 3.5 |
| Jul | 29° / 25° | 150 | 22.4 | 12 | 3.9 |
| Aug | 29° / 25° | 124 | 20 | 12 | 4.2 |
| Sep | 29° / 25° | 130 | 20.4 | 12 | 3.9 |
| Oct | 29° / 25° | 176 | 25.3 | 12 | 3.4 |
| Nov | 29° / 25° | 220 | 28.3 | 12 | 2.9 |
| Dec | 29° / 25° | 248 | 28.9 | 12 | 3.0 |
Cloud cover in Winter
The sky is clear or mostly clear about 3% of the time across winter.
Chance of precipitation in Winter
Bontang gets around 614 mm of rain over 76 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 8 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 12 hours in early December to 12 hours by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 4.7 kWh/m².
Is winter a good time to visit Bontang?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a weaker month for outdoor sightseeing in Bontang.
What to pack for Bontang in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Bontang sees daytime highs around 29°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 76 days see rain.
Sea temperature near Bontang in Winter
The nearest coast averages about 29°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 16 km away) is warmest in May at about 30°C and coldest in February near 29°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 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 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 | 29 | Tropical |
| Apr | 29 | Tropical |
| May | 30 | Tropical |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 29 | Tropical |
UV index in Bontang in Winter
Clear-sky midday UV across winter 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 Bontang peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 11 (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 | 16 | 15 | 13 | 11 | 11 | 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 | 16 | Extreme |
| Apr | 15 | Extreme |
| May | 13 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 12 | Extreme |
| Sep | 13 | Extreme |
| Oct | 13 | Extreme |
| Nov | 13 | Extreme |
| Dec | 12 | Extreme |
Air quality in Bontang in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Bontang is worst in September — around 18 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (January, 9 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) | 9 | 9 | 9 | 11 | 10 | 12 | 12 | 14 | 18 | 17 | 12 | 11 |
| Level | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 9 | Good |
| Mar | 9 | Good |
| Apr | 11 | Good |
| May | 10 | Good |
| Jun | 12 | Good |
| Jul | 12 | Good |
| Aug | 14 | Moderate |
| Sep | 18 | Moderate |
| Oct | 17 | Moderate |
| Nov | 12 | Good |
| Dec | 11 | Good |
Where is Bontang?
Bontang sits at 0.1°N, 117.5°E, 10 m above sea level, in Indonesia. The nearest listed city is Samarinda, 79 km away.
Topography around Bontang
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bontang.
Within 3 km, the terrain around Bontang has only modest variations in elevation — a maximum elevation change of 61 m around an average of 10 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 323 m; within 80 km, large variations in elevation — a maximum elevation change of 613 m.
The land around Bontang is covered by artificial surfaces (35%), trees (25%) and mangroves (25%) within 3 km, trees (43%) and water (41%) within 16 km, and trees (57%) and water (34%) 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 Bontang (0.1324°, 117.4854°, elevation 10 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.