Njala weather in December

In December, Njala sees average daytime highs of 31°C and overnight lows near 22°C, with 20 mm of rain across 4.9 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 30°C in the first days to 32°C by the end. The sky is clear or mostly clear about 46% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 11 h 36 min at the start of December to 11 h 30 min by month's end. Set against the rest of the year, December is Njala's 3rd-clearest and 10th-windiest month. For the whole year in context, see Njala's year-round climate.

Daytime high
31°
5th warmest
Overnight low
22°
1st coldest
Rainfall
20 mm
4.9 wet days
Daylight
11 h 30 min
6:59 AM – 6:30 PM
Cloud cover
47%
3rd clearest
Wind
4 km/h
10th windiest
Solar energy
4.88 kWh/m²
Travel score
5.0
out of 10

Njala is place in Southern Province, 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 30°C in the first days to 32°C by the end.

A typical December day in Njala reaches about 31°C in the afternoon and slips back to 22°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 33°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)
13022
23022
33122
43122
53122
63122
73122
83122
93122
103122
113122
123122
133122
143122
153122
163122
173122
183122
193122
203122
213222
223222
233222
243222
253222
263222
273222
283222
293222
303222
313222

How December really feels in Njala

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.

Njala 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
Jan33° / 22°133.411.64.1
Feb35° / 23°143.311.73.0
Mar35° / 24°449.811.92.7
Apr33° / 24°9616.312.22.8
May31° / 24°22426.312.42.7
Jun29° / 23°32128.812.52.8
Jul28° / 22°39729.212.43.2
Aug28° / 22°49629.512.33.3
Sep29° / 22°40329.2122.9
Oct30° / 23°22828.911.82.9
Nov30° / 22°8918.611.63.9
Dec31° / 22°204.911.55.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% 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 (%)
15248
25347
35545
45545
55644
65842
75842
85941
96040
106139
116238
126337
136436
146535
156535
166733
176733
186931
196931
207129
217129
227228
237228
247327
257426
267426
277426
287525
297525
307525
317426

Chance of precipitation in December

Any precipitation

Njala gets around 20 mm of rain over 4.9 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 17% and peaks near 35% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
233
331
429
528
626
725
823
922
1021
1120
1219
1318
1417
1516
1616
1715
1814
1913
2013
2112
2211
2310
2410
259
269
278
288
298
308
318

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 76% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100028612
200128512
300138511
400148510
500148510
60015859
70016858
80016867
90017857
100018856
110019855
120019864
1300110854
1400111853
1500212833
1600213823
1700214822
1800215812
1900216802
2001218772
2101319761
2201321741
2301422721
2401424701
2512525661
2612627631
2712629611
2812731581
2913833541
3013834540
3123936500

Wind in December

Winds average 4 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
134calm
144calm
154calm
164calm
174calm
184calm
194calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 36 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 shrink by about 6 minutes over December. Sunrise moves from 6:51 AM to 7:05 AM, and sunset from 6:24 PM to 6:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:516:24
211.66:526:25
311.56:526:25
411.56:536:25
511.56:536:26
611.56:546:26
711.56:546:26
811.56:556:27
911.56:556:27
1011.56:566:27
1111.56:566:28
1211.56:576:28
1311.56:576:29
1411.56:586:29
1511.56:586:29
1611.56:596:30
1711.56:596:30
1811.57:006:31
1911.57:006:31
2011.57:006:32
2111.57:016:32
2211.57:016:33
2311.57:026:33
2411.57:026:34
2511.57:036:34
2611.57:036:35
2711.57:046:35
2811.57:046:36
2911.57:056:36
3011.57:056:37
3111.57:056:37

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.88 kWh/m².

For context, solar energy here swings from a low near 3.28 kWh/m² to a high of 5.69 kWh/m² in February across the year — December's 4.88 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.6Bright
54.6Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in December

Hazard calendar for Njala

In seasonPeak

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

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

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

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

Is December a good time to visit Njala?

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

5.0
Sightseeing
1st-best month of the year
7.4
Beach & pool
1st-best month of the year

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

What to pack for Njala in December

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

In December, Njala sees daytime highs around 31°C and nights near 22°C. Pack light clothes. Worth having: sun protection. About 5 days see rain.

light clothessun protection

UV index in Njala 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 Njala peaks around August 20 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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 20UV 13Dec 15UV 8
UV index (midday)Level
Jan10Very high
Feb12Extreme
Mar12Extreme
Apr10Very high
May12Extreme
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov9Very high
Dec8Very high

Air quality in Njala 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 Njala is worst in April — around 202 µg/m³ PM2.5 (very unhealthy), about 19.4× the cleanest month (August, 10 µg/m³).

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

0306090120150180210JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyVery unhealthyModerateGoodModeratePoorApr 9200 µg/m³Aug 2011 µg/m³
PM2.5 (µg/m³)Level
Jan70Unhealthy
Feb77Unhealthy
Mar194Very unhealthy
Apr202Very unhealthy
May33Moderate
Jun19Moderate
Jul13Moderate
Aug10Good
Sep11Good
Oct17Moderate
Nov25Moderate
Dec50Poor
Location & terrain

Where is Njala?

Njala sits at 8.2°N, 12.0°W, 67 m above sea level, in Sierra Leone. The nearest listed city is Mile 91, 34 km away.

Mile 91BumpeBoMakeniLunsarKenemaPort LokoWaterloo

Topography around Njala

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

Within 3 km, the terrain around Njala has only modest variations in elevation — a maximum elevation change of 51 m around an average of 61 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 96 m; within 80 km, large variations in elevation — a maximum elevation change of 820 m.

The land around Njala is covered by grassland (54%) and shrubs (28%) within 3 km, grassland (53%), shrubs (26%) and trees (20%) within 16 km, and trees (57%), grassland (21%) and shrubs (20%) within 80 km.

3 km
51 m
16 km
96 m
80 km
820 m
treesshrubsgrasslandwatermangroves
December weather nearby: Mile 91 34 km · Bumpe 40 km · Bo 43 km · Makeni 73 km · Lunsar 76 km · Kenema 99 km · Port Loko 104 km · Waterloo 117 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 Njala (8.2323°, -12.0156°, elevation 67 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).