Bireun in Summer
In summer (June, July and August), Bireun sees average daytime highs around 30°C and overnight lows near 26°C, with 420 mm of rain over about 59 wet days across the season. It is the warmest season of the year and the driest season of the year.
Across summer, daytime highs hold fairly steady around 30°C. The sky is clear or mostly clear about 4% of the time across summer, and the air most often feels miserable.
Summer is Bireun's 2nd-best season to visit on our travel score. Bireun 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 Bireun's year-round climate.
- Avg daytime high
- 30°C
- warmest season of the year
- Avg overnight low
- 26°C
- Rainfall
- 420 mm
- 59 wet days
- Avg wind
- 5 km/h
- Travel score
- 3.5
- 2nd-best season
- Months
- Jun · Jul · Aug
Temperature in Bireun in Summer
Across summer, daytime highs hold fairly steady around 30°C.
A typical summer day in Bireun reaches about 30°C and drops to 26°C overnight. The warmest of the three months is June, the coolest August.
How summer really feels in Bireun
Once humidity and wind are folded in, summer brings about 92 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.
Bireun weather by month
How the three summer months (June, July and August) 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° | 156 | 21.8 | 11.7 | 3.9 |
| Feb | 29° / 25° | 118 | 18.4 | 11.8 | 4.0 |
| Mar | 30° / 25° | 144 | 22.3 | 12 | 3.6 |
| Apr | 30° / 25° | 168 | 25.1 | 12.1 | 3.0 |
| May | 30° / 26° | 193 | 23.1 | 12.2 | 3.1 |
| Jun | 31° / 26° | 126 | 18 | 12.3 | 3.6 |
| Jul | 30° / 26° | 136 | 19.5 | 12.3 | 3.6 |
| Aug | 30° / 25° | 157 | 21.8 | 12.2 | 3.4 |
| Sep | 30° / 25° | 199 | 24.1 | 12 | 3.2 |
| Oct | 29° / 25° | 272 | 27.4 | 11.9 | 3.1 |
| Nov | 29° / 25° | 367 | 27.9 | 11.8 | 3.0 |
| Dec | 29° / 25° | 292 | 25.2 | 11.7 | 3.5 |
Cloud cover in Summer
The sky is clear or mostly clear about 4% of the time across summer.
Chance of precipitation in Summer
Bireun gets around 420 mm of rain over 59 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 5 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 18 min in early June to 12 h 06 min by late August. 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 5.3 kWh/m².
Hazard calendar for Bireun
In summer, Bireun overlaps its cyclone season. The full year is below, with each hazard's peak months called out.
Bireun sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.
Is summer a good time to visit Bireun?
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 Bireun.
What to pack for Bireun in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Bireun sees daytime highs around 30°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 59 days see rain.
Sea temperature near Bireun in Summer
The nearest coast averages about 30°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 21 km away) is warmest in May at about 30°C and coldest in January 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) | 28 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 28 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Tropical |
| Feb | 29 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 30 | Tropical |
| Aug | 30 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Tropical |
UV index in Bireun in Summer
Clear-sky midday UV across summer averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Bireun peaks around February 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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) | 11 | 14 | 14 | 14 | 12 | 11 | 11 | 11 | 13 | 13 | 11 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 14 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 13 | Extreme |
| Oct | 13 | Extreme |
| Nov | 11 | Extreme |
| Dec | 10 | Extreme |
Air quality in Bireun 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 Bireun is worst in September — around 19 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 15 | 16 | 19 | 18 | 18 | 19 | 18 | 18 | 19 | 17 | 14 | 13 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 15 | Moderate |
| Feb | 16 | Moderate |
| Mar | 19 | Moderate |
| Apr | 18 | Moderate |
| May | 18 | Moderate |
| Jun | 19 | Moderate |
| Jul | 18 | Moderate |
| Aug | 18 | Moderate |
| Sep | 19 | Moderate |
| Oct | 17 | Moderate |
| Nov | 14 | Moderate |
| Dec | 13 | Moderate |
Where is Bireun?
Bireun sits at 5.2°N, 96.7°E, 19 m above sea level, in Indonesia. The nearest listed city is Reuleuet, 46 km away.
Topography around Bireun
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bireun.
Within 3 km, the terrain around Bireun has only modest variations in elevation — a maximum elevation change of 158 m around an average of 20 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 372 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,846 m.
The land around Bireun is covered by trees (41%), cropland (31%) and artificial surfaces (24%) within 3 km, trees (49%) and water (39%) within 16 km, and trees (59%) and water (35%) 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 Bireun (5.203°, 96.7009°, elevation 19 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.