Tonj weather in December

In December, Tonj sees average daytime highs of 35°C and overnight lows near 23°C, with 2 mm of rain across 0.4 wet days and about 11.6 hours of daylight. It is the 5th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 57% of the time in December, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of December to 11 h 36 min by month's end. Set against the rest of the year, December is Tonj's 1st-clearest and 3rd-windiest month. For the whole year in context, see Tonj's year-round climate.

Daytime high
35°
5th warmest
Overnight low
23°
5th coldest
Rainfall
2 mm
0.4 wet days
Daylight
11 h 36 min
7:14 AM – 6:49 PM
Cloud cover
38%
1st clearest
Wind
9 km/h
3rd windiest
Solar energy
5.83 kWh/m²
Travel score
3.3
out of 10

Tonj is human settlement.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 35°C through the month.

A typical December day in Tonj reaches about 35°C in the afternoon and slips back to 23°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 37°C. Set against its neighbours, December runs about 2°C warmer than November and on par with January.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13523
23523
33523
43523
53523
63523
73523
83523
93523
103523
113523
123523
133523
143523
153523
163523
173523
183523
193523
203523
213523
223523
233523
243523
253523
263523
273523
283523
293523
303523
313523

How December really feels in Tonj

Once humidity and wind are folded in, December averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Tonj weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan36° / 23°10.311.62.8
Feb37° / 24°30.711.81.8
Mar38° / 26°214.5121.4
Apr36° / 26°6313.612.21.8
May34° / 25°1222012.32.5
Jun32° / 23°12720.312.43.1
Jul30° / 23°16322.912.43.4
Aug30° / 22°17823.612.23.3
Sep31° / 22°15222.4123.2
Oct32° / 23°12220.211.83.2
Nov33° / 23°235.711.73.6
Dec35° / 23°20.411.63.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 57% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of December, with mostly cloudy or overcast conditions the remaining 24%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17426
27426
37426
47426
57525
67525
77426
87525
97525
107525
117525
127624
137624
147624
157723
167723
177723
187723
197822
207822
217822
227723
237723
247723
257624
267624
277525
287525
297426
307327
317228

Chance of precipitation in December

Any precipitation

Tonj gets around 2 mm of rain over 0.4 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 1% and peaks near 5% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
15
24
34
43
53
63
73
82
92
102
112
121
131
141
151
161
171
181
190
200
210
220
230
240
250
260
270
281
291
301
311

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the dry band about 70% of days. Sticky, muggy-or-worse air turns up on roughly 5% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1372224143
2392224132
3412223122
4442222102
546222192
648212082
750211982
854201871
957201661
1059191561
1162181451
1265171251
1368161141
1471151040
157414930
167613830
177812730
188012620
198211520
208410420
218410420
22869410
23879310
24879310
25879310
26879310
27879310
28879310
29869410
30869410
31869410

Wind in December

Winds average 9 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 36 min at the start of December to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 7:07 AM to 7:21 AM, and sunset from 6:43 PM to 6:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:076:43
211.67:076:44
311.67:086:44
411.67:086:44
511.67:096:45
611.67:096:45
711.67:106:45
811.67:106:46
911.67:116:46
1011.67:116:46
1111.67:126:47
1211.67:126:47
1311.67:136:48
1411.67:136:48
1511.67:146:48
1611.67:146:49
1711.67:156:49
1811.67:156:50
1911.67:166:50
2011.67:166:51
2111.67:166:51
2211.67:176:52
2311.67:176:52
2411.67:186:53
2511.67:186:53
2611.67:196:53
2711.67:196:54
2811.67:206:54
2911.67:206:55
3011.67:216:55
3111.67:216:56

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.83 kWh/m².

For context, solar energy here swings from a low near 5.14 kWh/m² to a high of 6.46 kWh/m² in February across the year — December's 5.83 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
266.0Bright
276.0Bright
286.0Bright
296.0Bright
306.0Bright
316.0Bright
Planning a trip in December

Hazard calendar for Tonj

In seasonPeak

None of Tonj's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Tonj's rainy season runs May–October, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Tonj?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.3
Sightseeing
3rd-best month of the year
7.0
Beach & pool
1st-best month of the year

December is a weaker month for outdoor sightseeing in Tonj. The water and warmth also suit a beach or pool day.

What to pack for Tonj in December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Tonj sees daytime highs around 35°C and nights near 23°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Tonj in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks 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 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highMar 21UV 13Dec 12UV 9
UV index (midday)Level
Jan11Extreme
Feb11Extreme
Mar14Extreme
Apr13Extreme
May11Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep12Extreme
Oct12Extreme
Nov10Very high
Dec9Very high

Air quality in Tonj in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December 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).

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateGoodModeratePoorDec 1349 µg/m³Aug 2411 µg/m³
PM2.5 (µg/m³)Level
Jan39Poor
Feb42Poor
Mar44Poor
Apr24Moderate
May12Good
Jun15Moderate
Jul14Moderate
Aug11Good
Sep11Good
Oct16Moderate
Nov46Poor
Dec50Poor
Location & terrain

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.

WauRumbekKuacjokGogrialLeerAweilWinejokAbyei

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.

3 km
21 m
16 km
73 m
80 km
176 m
treesshrubsgrasslandcroplandartificial surfaceswetland
December weather nearby: Wau 89 km · Rumbek 122 km · Kuacjok 138 km · Gogrial 154 km · Leer 198 km · Aweil 218 km · Winejok 228 km · Abyei 260 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
Christian 61%folk religion 33%Muslim 6%

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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).