Koidu weather in December

In December, Koidu sees average daytime highs of 30°C and overnight lows near 20°C, with 16 mm of rain across 3.1 wet days and about 11.5 hours of daylight. It is the 5th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 29°C in the first days to 31°C by the end. The sky is clear or mostly clear about 47% of the time in December, and the air most often feels muggy.

Daylight stretches from about 11 h 30 min at the start of December to 11 h 30 min by month's end. Set against the rest of the year, December is Koidu's 3rd-clearest and 10th-windiest month. For the whole year in context, see Koidu's year-round climate.

Daytime high
30°
5th warmest
Overnight low
20°
2nd coldest
Rainfall
16 mm
3.1 wet days
Daylight
11 h 30 min
6:55 AM – 6:25 PM
Cloud cover
45%
3rd clearest
Wind
5 km/h
10th windiest
Solar energy
5.19 kWh/m²
Travel score
5.9
out of 10

Koidu is city in Kono District, Sierra Leone.

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 29°C in the first days to 31°C by the end.

A typical December day in Koidu reaches about 30°C in the afternoon and slips back to 20°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°C. Set against its neighbours, December runs about 1°C warmer than November and about 2°C cooler than January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12921
22921
32921
42921
52920
63020
73020
83020
93020
103020
113020
123020
133020
143020
153020
163020
173020
183020
193020
203020
213020
223020
233020
243120
253119
263119
273119
283119
293119
303119
313119

How December really feels in Koidu

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.

Koidu weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 20°112.411.64.9
Feb34° / 22°142.911.73.8
Mar33° / 23°6310.311.93.4
Apr32° / 23°10515.712.23.5
May30° / 23°23525.412.43.2
Jun28° / 22°3352812.53.3
Jul27° / 21°36929.312.53.5
Aug27° / 21°41929.712.33.4
Sep28° / 21°42228.812.13.3
Oct29° / 21°32229.511.83.1
Nov29° / 21°12916.411.64.5
Dec30° / 20°163.111.55.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 19% of December, with mostly cloudy or overcast conditions the remaining 34%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25446
35545
45545
55644
65743
75941
85941
96040
106238
116238
126337
136436
146535
156634
166733
176832
186931
197030
207129
217228
227228
237327
247426
257426
267426
277525
287525
297624
307624
317624

Chance of precipitation in December

Any precipitation

Koidu gets around 16 mm of rain over 3.1 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 11% and peaks near 26% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
126
224
322
420
519
618
716
815
914
1013
1112
1211
1311
1410
1510
169
179
188
198
207
217
226
236
246
255
265
275
285
295
305
315

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 43% of days. Sticky, muggy-or-worse air turns up on roughly 68% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11153558
22263753
32263852
42374048
52384145
63494242
734104439
835114536
945124634
1046124631
1156134729
1257134827
1367144825
1468144824
1578144922
1688144921
1789144920
1899154919
19109154818
201110154717
211310154616
221411154515
231611154414
241711164313
251912164112
262112174011
272212183810
28231318379
29251319358
30261321337
31271422326

Wind in December

Winds average 5 km/h in December.

Across December, daily wind ranges from about 4 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 30 min at the start of December to 11 h 30 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 6:48 AM to 7:02 AM, and sunset from 6:20 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.56:486:20
211.56:486:20
311.56:496:20
411.56:496:20
511.56:506:21
611.56:506:21
711.56:516:21
811.56:516:22
911.56:526:22
1011.56:526:23
1111.56:536:23
1211.56:536:23
1311.56:546:24
1411.56:546:24
1511.56:556:25
1611.56:556:25
1711.56:566:25
1811.56:566:26
1911.56:576:26
2011.56:576:27
2111.56:576:27
2211.56:586:28
2311.56:586:28
2411.56:596:29
2511.56:596:29
2611.57:006:30
2711.57:006:30
2811.57:016:31
2911.57:016:31
3011.57:026:32
3111.57:026:32

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.19 kWh/m².

For context, solar energy here swings from a low near 3.45 kWh/m² to a high of 5.99 kWh/m² in February across the year — December's 5.19 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.4Bright
265.4Bright
275.4Bright
285.4Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in December

Hazard calendar for Koidu

In seasonPeak

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

Koidu's monsoon runs May–October, when most of the year's rain falls.

Koidu sees seasonal dust haze (February–April), heaviest in April.

Monsoon
Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Koidu?

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

5.9
Sightseeing
1st-best month of the year
8.0
Beach & pool
1st-best month of the year

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

What to pack for Koidu in December

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

In December, Koidu sees daytime highs around 30°C and nights near 20°C. Pack light clothes. Worth having: sun protection. About 3 days see rain.

light clothessun protection

UV index in Koidu in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Koidu peaks around August 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 8 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 22UV 13Dec 14UV 8
UV index (midday)Level
Jan10Very high
Feb12Extreme
Mar13Extreme
Apr11Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov9Very high
Dec8Very high

Air quality in Koidu 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 Koidu is worst in March — around 233 µg/m³ PM2.5 (very unhealthy), about 25.9× the cleanest month (August, 9 µg/m³).

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

0306090120150180210240JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyVery unhealthyUnhealthyModerateGoodModeratePoorMar 18221 µg/m³Aug 189 µg/m³
PM2.5 (µg/m³)Level
Jan90Unhealthy
Feb98Unhealthy
Mar233Very unhealthy
Apr151Very unhealthy
May27Moderate
Jun18Moderate
Jul11Good
Aug9Good
Sep10Good
Oct16Moderate
Nov22Moderate
Dec45Poor
Location & terrain

Where is Koidu?

Koidu sits at 8.6°N, 11.0°W, 381 m above sea level, in Sierra Leone. The nearest listed city is Segbwema, 72 km away.

SegbwemaKenemaFoya KamaraYende MillimouGueckedouKissidougouBoMakeni

Topography around Koidu

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

Within 3 km, the terrain around Koidu has only modest variations in elevation — a maximum elevation change of 136 m around an average of 379 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 392 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,783 m.

The land around Koidu is covered by grassland (42%), artificial surfaces (30%) and trees (25%) within 3 km, trees (63%) and grassland (35%) within 16 km, and trees (80%) within 80 km.

3 km
136 m
16 km
392 m
80 km
1,783 m
treesshrubsgrasslandartificial surfacesbare terrainwater
December weather nearby: Segbwema 72 km · Kenema 89 km · Foya Kamara 90 km · Yende Millimou 92 km · Gueckedou 93 km · Kissidougou 113 km · Bo 113 km · Makeni 121 km

Sierra Leone travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type D / G
230 V · 50 Hz
Prices
≈ 24% of US
price level, 2025
GDP per capita
$846
2025
Happiness
3.3 / 10
World Happiness, 2025
Safe drinking water
11%
of population, 2024
Homicide rate
2.2
per 100k, 2020
Road deaths
33
per 100k/yr, 2019
Income group
Low
World Bank
Religion
Muslim 77%Christian 23%

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 Koidu (8.6439°, -10.9714°, elevation 381 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).