Tonj in Summer
In summer (June, July and August), Tonj sees average daytime highs around 31°C and overnight lows near 23°C, with 468 mm of rain over about 67 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Over the season highs ease from about 32°C in early June to 30°C by late August. The sky is clear or mostly clear about 11% of the time across summer, and the air most often feels oppressive.
Summer is Tonj's 2nd-best season to visit on our travel score. For the whole year in context, see Tonj's year-round climate.
- Avg daytime high
- 31°C
- coldest season of the year
- Avg overnight low
- 23°C
- Rainfall
- 468 mm
- 67 wet days
- Avg wind
- 6 km/h
- Travel score
- 3.3
- 2nd-best season
- Months
- Jun · Jul · Aug
Temperature in Tonj in Summer
Over the season highs ease from about 32°C in early June to 30°C by late August.
A typical summer day in Tonj reaches about 31°C and drops to 23°C overnight. The warmest of the three months is June, the coolest August.
How summer really feels in Tonj
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.
Tonj 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 | 36° / 23° | 1 | 0.3 | 11.6 | 2.8 |
| Feb | 37° / 24° | 3 | 0.7 | 11.8 | 1.8 |
| Mar | 38° / 26° | 21 | 4.5 | 12 | 1.4 |
| Apr | 36° / 26° | 63 | 13.6 | 12.2 | 1.8 |
| May | 34° / 25° | 122 | 20 | 12.3 | 2.5 |
| Jun | 32° / 23° | 127 | 20.3 | 12.4 | 3.1 |
| Jul | 30° / 23° | 163 | 22.9 | 12.4 | 3.4 |
| Aug | 30° / 22° | 178 | 23.6 | 12.2 | 3.3 |
| Sep | 31° / 22° | 152 | 22.4 | 12 | 3.2 |
| Oct | 32° / 23° | 122 | 20.2 | 11.8 | 3.2 |
| Nov | 33° / 23° | 23 | 5.7 | 11.7 | 3.6 |
| Dec | 35° / 23° | 2 | 0.4 | 11.6 | 3.3 |
Cloud cover in Summer
The sky is clear or mostly clear about 11% of the time across summer.
Chance of precipitation in Summer
Tonj gets around 468 mm of rain over 67 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 6 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 24 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 Tonj
In summer, Tonj overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Tonj's rainy season runs May–October, when most of the year's rain falls.
Is summer a good time to visit Tonj?
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 Tonj.
What to pack for Tonj in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Tonj sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 67 days see rain.
UV index in Tonj 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 Tonj peaks around March 21 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 9 (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) | 11 | 11 | 14 | 13 | 11 | 11 | 11 | 13 | 12 | 12 | 10 | 9 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 11 | Extreme |
| Mar | 14 | Extreme |
| Apr | 13 | Extreme |
| May | 11 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 13 | Extreme |
| Sep | 12 | Extreme |
| Oct | 12 | Extreme |
| Nov | 10 | Very high |
| Dec | 9 | Very high |
Air quality in Tonj 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 Tonj is worst in December — around 50 µg/m³ PM2.5 (poor), about 4.6× the cleanest month (August, 11 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) | 39 | 42 | 44 | 24 | 12 | 15 | 14 | 11 | 11 | 16 | 46 | 50 |
| Level | Poor | Poor | Poor | Moderate | Good | Moderate | Moderate | Good | Good | Moderate | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 39 | Poor |
| Feb | 42 | Poor |
| Mar | 44 | Poor |
| Apr | 24 | Moderate |
| May | 12 | Good |
| Jun | 15 | Moderate |
| Jul | 14 | Moderate |
| Aug | 11 | Good |
| Sep | 11 | Good |
| Oct | 16 | Moderate |
| Nov | 46 | Poor |
| Dec | 50 | Poor |
Where is Tonj?
Tonj sits at 7.3°N, 28.7°E, 444 m above sea level, in South Sudan. The nearest listed city is Wau, 89 km away.
Topography around Tonj
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Tonj.
Within 3 km, the terrain around Tonj has only modest variations in elevation — a maximum elevation change of 21 m around an average of 437 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 73 m; within 80 km, only modest variations in elevation — a maximum elevation change of 176 m.
The land around Tonj is covered by grassland (79%) within 3 km, grassland (64%) and shrubs (23%) within 16 km, and grassland (53%) and shrubs (32%) within 80 km.
South Sudan travel facts
- Travel advisory
- Level 4
- Do Not Travel
- Prices
- ≈ 6% of US
- price level, 2021
- GDP per capita
- $1,080
- 2015
- Happiness
- 2.8 / 10
- World Happiness, 2019
- Homicide rate
- 14
- per 100k, 2012
- Road deaths
- 36.7
- per 100k/yr, 2019
- Income group
- Low
- World Bank
- 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 Tonj (7.2739°, 28.6775°, elevation 444 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.