Rengasdengklok in Summer
In summer (December, January and February), Rengasdengklok sees average daytime highs around 30°C and overnight lows near 24°C, with 972 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 1% of the time across summer, and the air most often feels oppressive.
Summer is Rengasdengklok's weakest season of the year to visit on our travel score. Rengasdengklok 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 Rengasdengklok's year-round climate.
- Avg daytime high
- 30°C
- coldest season of the year
- Avg overnight low
- 24°C
- Rainfall
- 972 mm
- 84 wet days
- Avg wind
- 9 km/h
- Travel score
- 2.7
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Rengasdengklok in Summer
Across summer, daytime highs hold fairly steady around 30°C.
A typical summer day in Rengasdengklok reaches about 30°C and drops to 24°C overnight. The warmest of the three months is December, the coolest January.
How summer really feels in Rengasdengklok
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.
Rengasdengklok 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° | 343 | 29.1 | 12.3 | 2.8 |
| Feb | 30° / 24° | 327 | 26.9 | 12.2 | 2.7 |
| Mar | 30° / 24° | 300 | 29.3 | 12 | 2.6 |
| Apr | 31° / 24° | 236 | 26.9 | 11.9 | 2.7 |
| May | 31° / 24° | 135 | 21.1 | 11.7 | 3.3 |
| Jun | 31° / 24° | 89 | 15.4 | 11.6 | 4.0 |
| Jul | 31° / 23° | 66 | 11.5 | 11.7 | 4.5 |
| Aug | 31° / 23° | 38 | 7.8 | 11.8 | 4.6 |
| Sep | 32° / 24° | 59 | 11 | 12 | 4.0 |
| Oct | 32° / 24° | 157 | 20.4 | 12.1 | 3.1 |
| Nov | 31° / 24° | 271 | 26.9 | 12.3 | 2.6 |
| Dec | 30° / 24° | 302 | 27.9 | 12.4 | 2.7 |
Cloud cover in Summer
The sky is clear or mostly clear about 1% of the time across summer.
Chance of precipitation in Summer
Rengasdengklok gets around 972 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 oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 9 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 18 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 4.9 kWh/m².
Hazard calendar for Rengasdengklok
In summer, Rengasdengklok overlaps its cyclone and rainy season season. The full year is below, with each hazard's peak months called out.
Rengasdengklok sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Rengasdengklok's rainy season runs October–April, when most of the year's rain falls.
Is summer a good time to visit Rengasdengklok?
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 Rengasdengklok.
What to pack for Rengasdengklok in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Rengasdengklok 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 Rengasdengklok 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 33 km away) is warmest in May at about 30°C and coldest in February 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 | 28 | 29 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 30 | 29 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 29 | Tropical |
| Feb | 28 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 30 | Tropical |
| Dec | 29 | Tropical |
UV index in Rengasdengklok in Summer
Clear-sky midday UV across summer averages around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Rengasdengklok peaks around March 19 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 13 at about 7 (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) | 12 | 12 | 15 | 13 | 10 | 8 | 9 | 10 | 11 | 8 | 6 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Extreme | Extreme | Very high | High | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 12 | Extreme |
| Feb | 12 | Extreme |
| Mar | 15 | Extreme |
| Apr | 13 | Extreme |
| May | 10 | Very high |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 10 | Extreme |
| Sep | 11 | Extreme |
| Oct | 8 | Very high |
| Nov | 6 | High |
| Dec | 12 | Extreme |
Air quality in Rengasdengklok 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 Rengasdengklok is worst in May — around 69 µg/m³ PM2.5 (unhealthy), 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) | 48 | 48 | 62 | 68 | 69 | 65 | 58 | 59 | 64 | 68 | 69 | 50 |
| Level | Poor | Poor | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 48 | Poor |
| Feb | 48 | Poor |
| Mar | 62 | Unhealthy |
| Apr | 68 | Unhealthy |
| May | 69 | Unhealthy |
| Jun | 65 | Unhealthy |
| Jul | 58 | Unhealthy |
| Aug | 59 | Unhealthy |
| Sep | 64 | Unhealthy |
| Oct | 68 | Unhealthy |
| Nov | 69 | Unhealthy |
| Dec | 50 | Poor |
Where is Rengasdengklok?
Rengasdengklok sits at 6.2°S, 107.3°E, 10 m above sea level, in Indonesia. The nearest listed city is Karawang, 16 km away.
Topography around Rengasdengklok
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rengasdengklok.
Within 3 km, the terrain around Rengasdengklok has only modest variations in elevation — a maximum elevation change of 17 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 25 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,001 m.
The land around Rengasdengklok is covered by cropland (58%) and artificial surfaces (23%) within 3 km, cropland (81%) within 16 km, and water (39%) and trees (25%) 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 Rengasdengklok (-6.1592°, 107.2981°, 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.