Port Loko weather in September

In September, Port Loko sees average daytime highs of 29°C and overnight lows near 23°C, with 494 mm of rain across 29.6 wet days and about 12.1 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 0% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Port Loko's 10th-clearest and 7th-windiest month. For the whole year in context, see Port Loko's year-round climate.

Daytime high
29°
10th warmest
Overnight low
23°
6th coldest
Rainfall
494 mm
29.6 wet days
Daylight
12 hours
6:44 AM – 6:47 PM
Cloud cover
87%
10th clearest
Wind
6 km/h
7th windiest
Solar energy
3.93 kWh/m²
Travel score
2.9
out of 10

Port Loko is city.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical September day in Port Loko reaches about 29°C in the afternoon and slips back to 23°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12823
22823
32823
42823
52823
62823
72823
82823
92823
102823
112823
122823
132823
142923
152923
162923
172923
182923
192923
202923
212923
222923
232923
242923
252923
262923
272923
282923
292923
302923

How September really feels in Port Loko

Once humidity and wind are folded in, September averages 13 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
13
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Port Loko weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 22°112.711.54.7
Feb34° / 23°71.711.74.1
Mar34° / 24°21511.93.6
Apr33° / 25°568.912.23.5
May31° / 24°24624.912.42.9
Jun29° / 23°39429.512.52.8
Jul28° / 23°53930.212.53.1
Aug28° / 23°61030.112.33.3
Sep29° / 23°49429.612.12.9
Oct30° / 23°30229.911.82.8
Nov30° / 23°12921.711.63.6
Dec31° / 23°276.711.55.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 5% of September, with mostly cloudy or overcast conditions the remaining 95%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1298
2298
3298
4298
5397
6397
7397
8397
9397
10496
11496
12496
13496
14595
15595
16595
17595
18595
19595
20694
21694
22694
23694
24694
25694
26694
27694
28793
29793
30793

Chance of precipitation in September

Any precipitation

Port Loko gets around 494 mm of rain over 29.6 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 99% and peaks near 99% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
199
299
399
499
599
699
799
899
999
1099
1199
1299
1399
1499
1599
1699
1799
1899
1999
2099
2199
2299
2399
2499
2599
2699
2798
2898
2998
3098

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 95% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
1982
2982
3982
4982
5982
6982
7982
8982
9973
10973
11973
12964
13964
14964
15955
16955
17955
18946
19946
20946
21946
22946
23946
24946
25946
26937
27937
28937
29937
30928

Wind in September

Winds average 6 km/h in September.

Across September, 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.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 12 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over September. Sunrise moves from 6:46 AM to 6:43 AM, and sunset from 6:56 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:466:56
212.26:466:55
312.26:466:55
412.16:456:54
512.16:456:54
612.16:456:53
712.16:456:52
812.16:456:52
912.16:456:51
1012.16:456:51
1112.16:456:50
1212.16:456:49
1312.16:446:49
1412.16:446:48
1512.16:446:48
1612.06:446:47
1712.06:446:46
1812.06:446:46
1912.06:446:45
2012.06:446:44
2112.06:436:44
2212.06:436:43
2312.06:436:43
2412.06:436:42
2512.06:436:41
2612.06:436:41
2712.06:436:40
2811.96:436:40
2911.96:436:39
3011.96:436:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.93 kWh/m².

For context, solar energy here swings from a low near 3.42 kWh/m² to a high of 6.03 kWh/m² in March across the year — September's 3.93 kWh/m² sits near the bottom.

012345151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.6Moderate
33.7Moderate
43.7Moderate
53.7Moderate
63.7Moderate
73.7Moderate
83.8Moderate
93.8Moderate
103.8Moderate
113.8Moderate
123.9Moderate
133.9Moderate
143.9Moderate
153.9Moderate
164.0Moderate
174.0Moderate
184.0Bright
194.0Bright
204.1Bright
214.1Bright
224.1Bright
234.1Bright
244.1Bright
254.2Bright
264.2Bright
274.2Bright
284.2Bright
294.2Bright
304.2Bright
Planning a trip in September

Hazard calendar for Port Loko

In seasonPeak

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

Port Loko's monsoon runs June–October, when most of the year's rain falls.

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

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

Is September a good time to visit Port Loko?

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

2.9
Sightseeing
9th-best month of the year
3.6
Beach & pool
10th-best month of the year

September is a weaker month for outdoor sightseeing in Port Loko.

What to pack for Port Loko in September

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

In September, Port Loko sees daytime highs around 29°C and nights near 23°C. Pack light clothes and rain gear. About 30 days see rain.

light clothesrain gear

Sea temperature near Port Loko in September

The nearest coast averages about 27°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 66 km away) is warmest in November at about 29°C and coldest in August near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb27Warm
Mar27Warm
Apr28Warm
May28Tropical
Jun28Tropical
Jul28Warm
Aug27Warm
Sep27Warm
Oct28Tropical
Nov29Tropical
Dec29Tropical

UV index in Port Loko in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Port Loko 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 20UV 13Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar13Extreme
Apr11Extreme
May12Extreme
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Port Loko in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Port Loko is worst in April — around 267 µg/m³ PM2.5 (very unhealthy), about 19.2× the cleanest month (August, 14 µg/m³).

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

0306090120150180210240270JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyVery unhealthyModerateUnhealthyApr 15244 µg/m³Aug 1614 µg/m³
PM2.5 (µg/m³)Level
Jan96Unhealthy
Feb97Unhealthy
Mar93Unhealthy
Apr267Very unhealthy
May55Poor
Jun25Moderate
Jul16Moderate
Aug14Moderate
Sep17Moderate
Oct24Moderate
Nov35Poor
Dec67Unhealthy
Location & terrain

Where is Port Loko?

Port Loko sits at 8.8°N, 12.8°W, 51 m above sea level, in Sierra Leone. The nearest listed city is Lunsar, 29 km away.

LunsarWaterlooFreetownGoderichMile 91ForécariahMakeniNjala

Topography around Port Loko

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

Within 3 km, the terrain around Port Loko has only modest variations in elevation — a maximum elevation change of 65 m around an average of 31 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 120 m; within 80 km, large variations in elevation — a maximum elevation change of 885 m.

The land around Port Loko is covered by trees (60%) and grassland (22%) within 3 km, trees (59%) and grassland (27%) within 16 km, and trees (44%) and grassland (21%) within 80 km.

3 km
65 m
16 km
120 m
80 km
885 m
treesshrubsgrasslandartificial surfaceswaterwetlandmangroves
September weather nearby: Lunsar 29 km · Waterloo 57 km · Freetown 58 km · Goderich 67 km · Mile 91 71 km · Forécariah 81 km · Makeni 83 km · Njala 104 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 Port Loko (8.7661°, -12.787°, elevation 51 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).