Cianjur in Summer
In summer (December, January and February), Cianjur sees average daytime highs around 28°C and overnight lows near 22°C, with 918 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 28°C. The sky is clear or mostly clear about 1% of the time across summer, and the air most often feels oppressive.
Summer is Cianjur's weakest season of the year to visit on our travel score. Cianjur 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 Cianjur's year-round climate.
- Avg daytime high
- 28°C
- coldest season of the year
- Avg overnight low
- 22°C
- Rainfall
- 918 mm
- 84 wet days
- Avg wind
- 4 km/h
- Travel score
- 3.1
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Cianjur in Summer
Across summer, daytime highs hold fairly steady around 28°C.
A typical summer day in Cianjur reaches about 28°C and drops to 22°C overnight. The warmest of the three months is December, the coolest January.
How summer really feels in Cianjur
Once humidity and wind are folded in, summer brings about 9 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.
Cianjur 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 | 28° / 22° | 305 | 29.1 | 12.4 | 3.2 |
| Feb | 28° / 22° | 291 | 27 | 12.2 | 3.1 |
| Mar | 29° / 22° | 299 | 29.4 | 12 | 2.9 |
| Apr | 29° / 22° | 258 | 27 | 11.9 | 3.1 |
| May | 29° / 22° | 140 | 21.8 | 11.7 | 3.8 |
| Jun | 29° / 21° | 83 | 14.9 | 11.6 | 4.6 |
| Jul | 30° / 21° | 67 | 10.8 | 11.6 | 5.0 |
| Aug | 30° / 21° | 55 | 8.2 | 11.8 | 5.0 |
| Sep | 31° / 21° | 80 | 11.1 | 12 | 4.4 |
| Oct | 30° / 22° | 228 | 19.9 | 12.2 | 3.6 |
| Nov | 29° / 22° | 328 | 26.5 | 12.3 | 3.1 |
| Dec | 29° / 22° | 322 | 27.7 | 12.4 | 3.1 |
Cloud cover in Summer
The sky is clear or mostly clear about 1% of the time across summer.
Chance of precipitation in Summer
Cianjur gets around 918 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 4 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 24 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.
Hazard calendar for Cianjur
In summer, Cianjur overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Cianjur's rainy season runs October–April, when most of the year's rain falls.
Is summer a good time to visit Cianjur?
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 Cianjur.
What to pack for Cianjur in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Cianjur sees daytime highs around 28°C and nights near 22°C. Pack light clothes and rain gear. About 84 days see rain.
UV index in Cianjur in Summer
Clear-sky midday UV across summer averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Cianjur peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 15 at about 7 (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) | 14 | 14 | 16 | 12 | 9 | 8 | 9 | 11 | 12 | 11 | 7 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Extreme | Extreme | Extreme | High | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 14 | Extreme |
| Mar | 16 | Extreme |
| Apr | 12 | Extreme |
| May | 9 | Very high |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 7 | High |
| Dec | 12 | Extreme |
Air quality in Cianjur 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 Cianjur is worst in May — around 121 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) | 77 | 81 | 95 | 106 | 121 | 117 | 108 | 92 | 84 | 84 | 87 | 77 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 77 | Unhealthy |
| Feb | 81 | Unhealthy |
| Mar | 95 | Unhealthy |
| Apr | 106 | Unhealthy |
| May | 121 | Unhealthy |
| Jun | 117 | Unhealthy |
| Jul | 108 | Unhealthy |
| Aug | 92 | Unhealthy |
| Sep | 84 | Unhealthy |
| Oct | 84 | Unhealthy |
| Nov | 87 | Unhealthy |
| Dec | 77 | Unhealthy |
Where is Cianjur?
Cianjur sits at 6.8°S, 107.1°E, 456 m above sea level, in Indonesia. The nearest listed city is Ciranjang-hilir, 13 km away.
Topography around Cianjur
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Cianjur.
Within 3 km, the terrain around Cianjur has only modest variations in elevation — a maximum elevation change of 193 m around an average of 450 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,513 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,993 m.
The land around Cianjur is covered by artificial surfaces (41%), cropland (32%) and trees (26%) within 3 km, trees (60%) and cropland (28%) within 16 km, and trees (68%) 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 Cianjur (-6.8222°, 107.1394°, elevation 456 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.