Njala weather in May

In May, Njala sees average daytime highs of 31°C and overnight lows near 24°C, with 224 mm of rain across 26.3 wet days and about 12.4 hours of daylight. It is the 6th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 32°C in the first days to 30°C by the end. The sky is clear or mostly clear about 1% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 18 min at the start of May to 12 h 24 min by month's end. Set against the rest of the year, May is Njala's 9th-clearest and 9th-windiest month. For the whole year in context, see Njala's year-round climate.

Daytime high
31°
6th warmest
Overnight low
24°
10th coldest
Rainfall
224 mm
26.3 wet days
Daylight
12 h 24 min
6:33 AM – 6:56 PM
Cloud cover
85%
9th clearest
Wind
5 km/h
9th windiest
Solar energy
4.32 kWh/m²
Travel score
2.7
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 May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 32°C in the first days to 30°C by the end.

A typical May day in Njala reaches about 31°C in the afternoon and slips back to 24°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°C. Set against its neighbours, May runs about 2°C cooler than April and about 2°C warmer than June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13224
23224
33224
43224
53224
63224
73224
83124
93124
103124
113124
123124
133124
143124
153124
163124
173124
183124
193124
203124
213124
223124
233124
243123
253023
263023
273023
283023
293023
303023
313023

How May really feels in Njala

Once humidity and wind are folded in, May 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 May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Njala weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 6th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 7% of May, with mostly cloudy or overcast conditions the remaining 92%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11486
21486
31387
41288
51288
61189
71189
8991
9991
10991
11892
12892
13892
14793
15793
16793
17793
18694
19595
20595
21595
22595
23595
24595
25595
26595
27595
28595
29595
30595
31595

Chance of precipitation in May

Any precipitation

Njala gets around 224 mm of rain over 26.3 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 85% and peaks near 93% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
171
273
374
475
577
678
779
880
981
1082
1183
1284
1385
1486
1587
1688
1788
1889
1989
2090
2190
2290
2391
2491
2591
2691
2792
2892
2992
3093
3193

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 61% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
125444
225444
315445
415346
515346
615346
715346
815346
905446
1005446
1105545
1205545
1305644
1405644
1505743
1605842
1705941
1806040
1906139
2006238
2106337
2206436
2306634
2406733
2506931
2607129
2707228
2807426
2907624
3007822
3107921

Wind in May

Winds average 5 km/h in May.

Across May, daily wind ranges from about 5 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
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 18 min at the start of May to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over May. Sunrise moves from 6:37 AM to 6:32 AM, and sunset from 6:54 PM to 6:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:376:54
212.36:366:54
312.36:366:54
412.36:366:54
512.36:356:54
612.36:356:54
712.36:356:54
812.36:356:54
912.36:346:55
1012.36:346:55
1112.36:346:55
1212.46:346:55
1312.46:346:55
1412.46:336:55
1512.46:336:55
1612.46:336:56
1712.46:336:56
1812.46:336:56
1912.46:336:56
2012.46:336:56
2112.46:326:56
2212.46:326:57
2312.46:326:57
2412.46:326:57
2512.46:326:57
2612.46:326:58
2712.46:326:58
2812.46:326:58
2912.46:326:58
3012.46:326:58
3112.46:326:59

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.32 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 — May's 4.32 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.6Bright
34.6Bright
44.6Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.2Bright
264.2Bright
274.2Bright
284.2Bright
294.1Bright
304.1Bright
314.1Bright
Planning a trip in May

Hazard calendar for Njala

In seasonPeak

In May, Njala sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

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 May a good time to visit Njala?

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

2.7
Sightseeing
11th-best month of the year
4.0
Beach & pool
7th-best month of the year

May is a weaker month for outdoor sightseeing in Njala.

What to pack for Njala in May

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

In May, Njala sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. About 26 days see rain.

light clothesrain gear

UV index in Njala in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks 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 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 May

GoodModeratePoorUnhealthyVery unhealthy

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