Isiro weather in December

In December, Isiro sees average daytime highs of 29°C and overnight lows near 20°C, with 58 mm of rain across 10.1 wet days and about 11.8 hours of daylight. It is the 4th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 28°C in the first days to 30°C by the end. The sky is clear or mostly clear about 20% of the time in December, and the air most often feels muggy.

Daylight stretches from about 11 h 54 min at the start of December to 11 h 48 min by month's end. Set against the rest of the year, December is Isiro's 2nd-clearest and 4th-windiest month. For the whole year in context, see Isiro's year-round climate.

Daytime high
29°
4th warmest
Overnight low
20°
6th coldest
Rainfall
58 mm
10.1 wet days
Daylight
11 h 48 min
6:10 AM – 6:01 PM
Cloud cover
65%
2nd clearest
Wind
6 km/h
4th windiest
Solar energy
5.27 kWh/m²
Travel score
5.3
out of 10

Isiro is city in the Democratic Republic of Congo, capital of the Haut-Uele province.

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 28°C in the first days to 30°C by the end.

A typical December day in Isiro reaches about 29°C in the afternoon and slips back to 20°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 31°C. Set against its neighbours, December runs about 2°C warmer than November and about 2°C cooler than January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12820
22820
32820
42820
52820
62820
72820
82820
92820
102920
112920
122920
132920
142920
152920
162920
172920
182920
192920
202920
213020
223020
233020
243020
253020
263020
273020
283020
293020
303020
313020

How December really feels in Isiro

Once humidity and wind are folded in, December averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Isiro weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 20°376.611.94.7
Feb32° / 20°609.711.94.0
Mar30° / 21°14620.3123.7
Apr28° / 21°18823.912.13.8
May28° / 21°15224.412.14.1
Jun27° / 20°1342412.24.1
Jul27° / 20°14925.212.14.2
Aug27° / 20°17826.312.14.0
Sep27° / 20°19026.5123.8
Oct27° / 20°22928.311.93.6
Nov27° / 20°2012411.94.1
Dec29° / 20°5810.111.85.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 22% of December, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
23367
33367
43466
53565
63664
73664
83763
93862
103961
114060
124159
134258
144357
154555
164555
174555
184555
194555
204753
214753
224753
234753
244654
254654
264654
274654
284654
294654
304654
314555

Chance of precipitation in December

Any precipitation

Isiro gets around 58 mm of rain over 10.1 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 32% and peaks near 53% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
153
252
351
450
548
647
745
844
942
1040
1138
1236
1334
1432
1530
1629
1727
1826
1925
2024
2123
2222
2322
2421
2521
2621
2720
2820
2920
3020
3119

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 70% of days. Sticky, muggy-or-worse air turns up on roughly 82% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
10147124
20157123
30157222
40157321
50267220
60267319
70267418
80277417
91277416
101277515
111387414
121397413
131397413
1413107412
1514117311
1614117410
1715127210
182513719
192613709
202614708
212615698
222716687
232716687
242717677
253717676
263717676
273818656
284818646
294818655
305818645
316819625

Wind in December

Winds average 6 km/h in December.

Across December, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 54 min at the start of December to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:04 AM to 6:17 AM, and sunset from 5:55 PM to 6:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:045:55
211.86:045:55
311.86:055:56
411.86:055:56
511.86:055:56
611.86:065:57
711.86:065:57
811.86:075:57
911.86:075:58
1011.86:085:58
1111.86:085:59
1211.86:095:59
1311.86:096:00
1411.86:106:00
1511.86:106:00
1611.86:106:01
1711.86:116:01
1811.86:116:02
1911.86:126:02
2011.86:126:03
2111.86:136:03
2211.86:136:04
2311.86:146:04
2411.86:146:05
2511.86:156:05
2611.86:156:06
2711.86:166:06
2811.86:166:07
2911.86:176:07
3011.86:176:07
3111.86:176:08

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.27 kWh/m².

For context, solar energy here swings from a low near 4.62 kWh/m² to a high of 5.75 kWh/m² in February across the year — December's 5.27 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in December

Is December a good time to visit Isiro?

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

5.3
Sightseeing
1st-best month of the year
6.8
Beach & pool
2nd-best month of the year

December is a reasonable time to visit Isiro for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Isiro in December

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

In December, Isiro sees daytime highs around 29°C and nights near 20°C. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Isiro in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Isiro peaks around March 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 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 highExtremeVery highMar 21UV 14Jul 11UV 9
UV index (midday)Level
Jan10Extreme
Feb11Extreme
Mar14Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul9Very high
Aug12Extreme
Sep12Extreme
Oct13Extreme
Nov10Extreme
Dec10Very high

Air quality in Isiro 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 Isiro is worst in February — around 130 µg/m³ PM2.5 (unhealthy), about 14.4× the cleanest month (October, 9 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0306090120150JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyModerateModerateGoodModerateFeb 14120 µg/m³Oct 109 µg/m³
PM2.5 (µg/m³)Level
Jan61Unhealthy
Feb130Unhealthy
Mar49Poor
Apr18Moderate
May10Good
Jun15Moderate
Jul16Moderate
Aug12Moderate
Sep9Good
Oct9Good
Nov15Moderate
Dec36Poor
Location & terrain

Where is Isiro?

Isiro sits at 2.8°N, 27.6°E, 761 m above sea level, in Democratic Republic of the Congo. The nearest listed city is Wamba, 81 km away.

BakwaWatsaYambioMangbwaluBabambaManginaHyosha

Topography around Isiro

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Isiro.

Within 3 km, the terrain around Isiro has only modest variations in elevation — a maximum elevation change of 60 m around an average of 748 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 286 m; within 80 km, significant variations in elevation — a maximum elevation change of 469 m.

The land around Isiro is covered by artificial surfaces (36%), grassland (32%) and trees (31%) within 3 km, trees (86%) within 16 km, and trees (91%) within 80 km.

3 km
60 m
16 km
286 m
80 km
469 m
treesgrasslandartificial surfaces
December weather nearby: Wamba 81 km · Bakwa 152 km · Watsa 215 km · Yambio 218 km · Mangbwalu 285 km · Babamba 288 km · Mangina 306 km · Hyosha 313 km

Democratic Republic of the Congo travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type C / E
220 V · 50 Hz
Prices
≈ 42% of US
price level, 2025
GDP per capita
$807
2025
Happiness
3.8 / 10
World Happiness, 2025
Safe drinking water
12%
of population, 2024
Road deaths
34.9
per 100k/yr, 2019
Income group
Low
World Bank
English
Very low
EF EPI 400

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 Isiro (2.7739°, 27.616°, elevation 761 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).