Tanjung Balai in Summer
In summer (June, July and August), Tanjung Balai sees average daytime highs around 29°C and overnight lows near 27°C, with 552 mm of rain over about 68 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 29°C. The sky is clear or mostly clear about 15% of the time across summer, and the air most often feels miserable.
Summer is Tanjung Balai's 2nd-best season to visit on our travel score. Tanjung Balai 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 Tanjung Balai's year-round climate.
- Avg daytime high
- 29°C
- warmest season of the year
- Avg overnight low
- 27°C
- Rainfall
- 552 mm
- 68 wet days
- Avg wind
- 16 km/h
- Travel score
- 3.9
- 2nd-best season
- Months
- Jun · Jul · Aug
Temperature in Tanjung Balai in Summer
Across summer, daytime highs hold fairly steady around 29°C.
A typical summer day in Tanjung Balai reaches about 29°C and drops to 27°C overnight. The warmest of the three months is June, the coolest August.
How summer really feels in Tanjung Balai
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.
Tanjung Balai 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 | 27° / 26° | 174 | 18.6 | 11.9 | 4.9 |
| Feb | 28° / 26° | 98 | 13.3 | 12 | 5.5 |
| Mar | 28° / 26° | 167 | 21.3 | 12 | 4.4 |
| Apr | 29° / 26° | 220 | 26.4 | 12 | 3.4 |
| May | 29° / 27° | 232 | 26.7 | 12 | 3.4 |
| Jun | 29° / 27° | 191 | 22.5 | 12.1 | 3.8 |
| Jul | 29° / 27° | 186 | 22.5 | 12.1 | 4.0 |
| Aug | 28° / 26° | 174 | 22.8 | 12 | 4.0 |
| Sep | 28° / 26° | 167 | 21.5 | 12 | 4.1 |
| Oct | 28° / 26° | 220 | 24.6 | 12 | 3.7 |
| Nov | 28° / 26° | 329 | 28.1 | 12 | 3.5 |
| Dec | 27° / 26° | 319 | 25.8 | 11.9 | 3.9 |
Cloud cover in Summer
The sky is clear or mostly clear about 15% of the time across summer.
Chance of precipitation in Summer
Tanjung Balai gets around 552 mm of rain over 68 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 16 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 06 min in early June to 12 hours 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 5.1 kWh/m².
Is summer a good time to visit Tanjung Balai?
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 Tanjung Balai.
What to pack for Tanjung Balai in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Tanjung Balai sees daytime highs around 29°C and nights near 27°C. Pack light clothes and rain gear. Worth having: sun protection. About 68 days see rain.
Sea temperature near Tanjung Balai 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 15 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 | 28 | 29 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Tropical |
| Feb | 28 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 30 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 29 | Tropical |
UV index in Tanjung Balai 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 Tanjung Balai peaks around February 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 10 (very high).
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) | 13 | 15 | 14 | 13 | 12 | 10 | 10 | 13 | 12 | 13 | 11 | 11 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 15 | Extreme |
| Mar | 14 | Extreme |
| Apr | 13 | Extreme |
| May | 12 | Extreme |
| Jun | 10 | Very high |
| Jul | 10 | Extreme |
| Aug | 13 | Extreme |
| Sep | 12 | Extreme |
| Oct | 13 | Extreme |
| Nov | 11 | Extreme |
| Dec | 11 | Extreme |
Air quality in Tanjung Balai 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 Tanjung Balai is worst in September — around 45 µg/m³ PM2.5 (poor), about 1.8× the cleanest month (January, 26 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) | 26 | 29 | 39 | 35 | 29 | 26 | 31 | 37 | 45 | 40 | 31 | 26 |
| Level | Moderate | Moderate | Poor | Moderate | Moderate | Moderate | Moderate | Poor | Poor | Poor | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 26 | Moderate |
| Feb | 29 | Moderate |
| Mar | 39 | Poor |
| Apr | 35 | Moderate |
| May | 29 | Moderate |
| Jun | 26 | Moderate |
| Jul | 31 | Moderate |
| Aug | 37 | Poor |
| Sep | 45 | Poor |
| Oct | 40 | Poor |
| Nov | 31 | Moderate |
| Dec | 26 | Moderate |
Where is Tanjung Balai?
Tanjung Balai sits at 1.0°N, 103.4°E, 9 m above sea level, in Indonesia. The nearest listed city is Boon Lay, 46 km away.
Topography around Tanjung Balai
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Tanjung Balai.
Within 3 km, the terrain around Tanjung Balai has only modest variations in elevation — a maximum elevation change of 37 m around an average of 6 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 480 m; within 80 km, large variations in elevation — a maximum elevation change of 656 m.
The land around Tanjung Balai is covered by water (47%) and artificial surfaces (25%) within 3 km, water (72%) within 16 km, and water (60%) and trees (28%) 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 Tanjung Balai (1.0001°, 103.4219°, elevation 9 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.