Kertosono in Winter
In winter (June, July and August), Kertosono sees average daytime highs around 31°C and overnight lows near 22°C, with 56 mm of rain over about 11 wet days across the season. It is the 2nd-warmest season and the driest season of the year.
Across winter, daytime highs hold fairly steady around 31°C. The sky is clear or mostly clear about 40% of the time across winter, and the air most often feels muggy.
Winter is Kertosono's best season of the year to visit on our travel score. For the whole year in context, see Kertosono's year-round climate.
- Avg daytime high
- 31°C
- 2nd-warmest season
- Avg overnight low
- 22°C
- Rainfall
- 56 mm
- 11 wet days
- Avg wind
- 6 km/h
- Travel score
- 4.9
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Kertosono in Winter
Across winter, daytime highs hold fairly steady around 31°C.
A typical winter day in Kertosono reaches about 31°C and drops to 22°C overnight. The warmest of the three months is August, the coolest August.
How winter really feels in Kertosono
Once humidity and wind are folded in, winter brings about 92 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.
Kertosono weather by month
How the three winter 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 | 31° / 24° | 379 | 29 | 12.4 | 2.4 |
| Feb | 31° / 24° | 368 | 27.3 | 12.2 | 2.3 |
| Mar | 31° / 24° | 318 | 28.2 | 12.1 | 2.4 |
| Apr | 31° / 24° | 181 | 22.7 | 11.8 | 2.9 |
| May | 31° / 23° | 78 | 12.5 | 11.7 | 4.1 |
| Jun | 31° / 23° | 35 | 6.8 | 11.6 | 4.7 |
| Jul | 31° / 22° | 15 | 3.3 | 11.6 | 5.1 |
| Aug | 32° / 22° | 5 | 1.2 | 11.8 | 5.0 |
| Sep | 33° / 22° | 14 | 2.1 | 12 | 4.3 |
| Oct | 33° / 23° | 61 | 8.7 | 12.2 | 3.4 |
| Nov | 33° / 24° | 168 | 19 | 12.3 | 2.6 |
| Dec | 32° / 24° | 321 | 26.2 | 12.4 | 2.5 |
Cloud cover in Winter
The sky is clear or mostly clear about 40% of the time across winter.
Chance of precipitation in Winter
Kertosono gets around 56 mm of rain over 11 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 6 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 h 36 min in early June to 11 h 48 min by late August. 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 5.3 kWh/m².
Hazard calendar for Kertosono
None of Kertosono's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Kertosono's monsoon runs December–April, when most of the year's rain falls.
Is winter a good time to visit Kertosono?
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 reasonable time to visit Kertosono for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Kertosono in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Kertosono sees daytime highs around 31°C and nights near 22°C. Pack light clothes. Worth having: sun protection. About 11 days see rain.
UV index in Kertosono in Winter
Clear-sky midday UV across winter averages around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Kertosono peaks around March 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 14 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) | 13 | 11 | 13 | 11 | 9 | 7 | 9 | 11 | 13 | 12 | 10 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | High | Very high | Extreme | Extreme | Extreme | Very high | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 11 | Extreme |
| Mar | 13 | Extreme |
| Apr | 11 | Extreme |
| May | 9 | Very high |
| Jun | 7 | High |
| Jul | 9 | Very high |
| Aug | 11 | Extreme |
| Sep | 13 | Extreme |
| Oct | 12 | Extreme |
| Nov | 10 | Very high |
| Dec | 12 | Extreme |
Air quality in Kertosono 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 Kertosono is worst in May — around 64 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) | 44 | 45 | 53 | 59 | 64 | 60 | 54 | 48 | 47 | 49 | 48 | 43 |
| Level | Poor | Poor | Poor | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Poor | Poor | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 44 | Poor |
| Feb | 45 | Poor |
| Mar | 53 | Poor |
| Apr | 59 | Unhealthy |
| May | 64 | Unhealthy |
| Jun | 60 | Unhealthy |
| Jul | 54 | Poor |
| Aug | 48 | Poor |
| Sep | 47 | Poor |
| Oct | 49 | Poor |
| Nov | 48 | Poor |
| Dec | 43 | Poor |
Where is Kertosono?
Kertosono sits at 7.6°S, 112.1°E, 43 m above sea level, in Indonesia. The nearest listed city is Diwek, 14 km away.
Topography around Kertosono
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Kertosono.
Within 3 km, the terrain around Kertosono has only modest variations in elevation — a maximum elevation change of 13 m around an average of 42 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 248 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,305 m.
The land around Kertosono is covered by cropland (52%), trees (23%) and artificial surfaces (22%) within 3 km, cropland (55%) and trees (28%) within 16 km, and trees (49%) and cropland (37%) 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 Kertosono (-7.5833°, 112.1°, elevation 43 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.