Koidu weather in September
In September, Koidu sees average daytime highs of 28°C and overnight lows near 21°C, with 422 mm of rain across 28.8 wet days and about 12.1 hours of daylight. It is the 10th-warmest and 1st-wettest month of the year here.
Day-to-day highs hold fairly steady near 28°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 Koidu's 10th-clearest and 7th-windiest month. For the whole year in context, see Koidu's year-round climate.
- Daytime high
- 28°
- 10th warmest
- Overnight low
- 21°
- 7th coldest
- Rainfall
- 422 mm
- 28.8 wet days
- Daylight
- 12 hours
- 6:37 AM – 6:40 PM
- Cloud cover
- 86%
- 10th clearest
- Wind
- 5 km/h
- 7th windiest
- Solar energy
- 4.13 kWh/m²
- Travel score
- 3.3
- 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 September
Day-to-day highs hold fairly steady near 28°C through the month.
A typical September day in Koidu reaches about 28°C in the afternoon and slips back to 21°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 29°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 21 |
| 2 | 27 | 21 |
| 3 | 27 | 21 |
| 4 | 27 | 21 |
| 5 | 27 | 21 |
| 6 | 27 | 21 |
| 7 | 27 | 21 |
| 8 | 27 | 21 |
| 9 | 27 | 21 |
| 10 | 27 | 21 |
| 11 | 27 | 21 |
| 12 | 28 | 21 |
| 13 | 28 | 21 |
| 14 | 28 | 21 |
| 15 | 28 | 21 |
| 16 | 28 | 21 |
| 17 | 28 | 21 |
| 18 | 28 | 21 |
| 19 | 28 | 21 |
| 20 | 28 | 21 |
| 21 | 28 | 21 |
| 22 | 28 | 21 |
| 23 | 28 | 21 |
| 24 | 28 | 21 |
| 25 | 28 | 21 |
| 26 | 28 | 21 |
| 27 | 28 | 21 |
| 28 | 28 | 21 |
| 29 | 28 | 21 |
| 30 | 28 | 21 |
How September really feels in Koidu
Once humidity and wind are folded in, September 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.
September 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 September compares with the rest of the year at a glance. September is the 10th-warmest and 1st-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 32° / 20° | 11 | 2.4 | 11.6 | 4.9 |
| Feb | 34° / 22° | 14 | 2.9 | 11.7 | 3.8 |
| Mar | 33° / 23° | 63 | 10.3 | 11.9 | 3.4 |
| Apr | 32° / 23° | 105 | 15.7 | 12.2 | 3.5 |
| May | 30° / 23° | 235 | 25.4 | 12.4 | 3.2 |
| Jun | 28° / 22° | 335 | 28 | 12.5 | 3.3 |
| Jul | 27° / 21° | 369 | 29.3 | 12.5 | 3.5 |
| Aug | 27° / 21° | 419 | 29.7 | 12.3 | 3.4 |
| Sep | 28° / 21° | 422 | 28.8 | 12.1 | 3.3 |
| Oct | 29° / 21° | 322 | 29.5 | 11.8 | 3.1 |
| Nov | 29° / 21° | 129 | 16.4 | 11.6 | 4.5 |
| Dec | 30° / 20° | 16 | 3.1 | 11.5 | 5.9 |
Cloud cover in September
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%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 9 |
| Cloudier (%) | 98 | 98 | 98 | 98 | 97 | 97 | 97 | 97 | 96 | 96 | 96 | 96 | 96 | 95 | 95 | 95 | 95 | 95 | 94 | 94 | 94 | 94 | 93 | 93 | 92 | 92 | 92 | 91 | 91 | 91 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 2 | 98 |
| 2 | 2 | 98 |
| 3 | 2 | 98 |
| 4 | 2 | 98 |
| 5 | 3 | 97 |
| 6 | 3 | 97 |
| 7 | 3 | 97 |
| 8 | 3 | 97 |
| 9 | 4 | 96 |
| 10 | 4 | 96 |
| 11 | 4 | 96 |
| 12 | 4 | 96 |
| 13 | 4 | 96 |
| 14 | 5 | 95 |
| 15 | 5 | 95 |
| 16 | 5 | 95 |
| 17 | 5 | 95 |
| 18 | 5 | 95 |
| 19 | 6 | 94 |
| 20 | 6 | 94 |
| 21 | 6 | 94 |
| 22 | 6 | 94 |
| 23 | 7 | 93 |
| 24 | 7 | 93 |
| 25 | 8 | 92 |
| 26 | 8 | 92 |
| 27 | 8 | 92 |
| 28 | 9 | 91 |
| 29 | 9 | 91 |
| 30 | 9 | 91 |
Chance of precipitation in September
Koidu gets around 422 mm of rain over 28.8 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 96% and peaks near 97% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 |
| Rain chance (%) | |
|---|---|
| 1 | 97 |
| 2 | 97 |
| 3 | 97 |
| 4 | 97 |
| 5 | 97 |
| 6 | 97 |
| 7 | 97 |
| 8 | 97 |
| 9 | 97 |
| 10 | 97 |
| 11 | 97 |
| 12 | 97 |
| 13 | 96 |
| 14 | 96 |
| 15 | 96 |
| 16 | 96 |
| 17 | 96 |
| 18 | 96 |
| 19 | 96 |
| 20 | 96 |
| 21 | 96 |
| 22 | 96 |
| 23 | 96 |
| 24 | 96 |
| 25 | 96 |
| 26 | 96 |
| 27 | 96 |
| 28 | 96 |
| 29 | 96 |
| 30 | 96 |
Humidity in September
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 77% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Muggy (%) | 33 | 32 | 31 | 30 | 29 | 29 | 28 | 27 | 27 | 26 | 25 | 24 | 24 | 23 | 23 | 22 | 22 | 21 | 21 | 20 | 20 | 19 | 19 | 18 | 18 | 17 | 16 | 16 | 15 | 15 |
| Oppressive (%) | 67 | 68 | 69 | 70 | 71 | 71 | 72 | 73 | 73 | 74 | 75 | 76 | 76 | 77 | 77 | 78 | 78 | 79 | 79 | 80 | 80 | 81 | 81 | 82 | 82 | 83 | 84 | 84 | 85 | 85 |
| Muggy (%) | Oppressive (%) | |
|---|---|---|
| 1 | 33 | 67 |
| 2 | 32 | 68 |
| 3 | 31 | 69 |
| 4 | 30 | 70 |
| 5 | 29 | 71 |
| 6 | 29 | 71 |
| 7 | 28 | 72 |
| 8 | 27 | 73 |
| 9 | 27 | 73 |
| 10 | 26 | 74 |
| 11 | 25 | 75 |
| 12 | 24 | 76 |
| 13 | 24 | 76 |
| 14 | 23 | 77 |
| 15 | 23 | 77 |
| 16 | 22 | 78 |
| 17 | 22 | 78 |
| 18 | 21 | 79 |
| 19 | 21 | 79 |
| 20 | 20 | 80 |
| 21 | 20 | 80 |
| 22 | 19 | 81 |
| 23 | 19 | 81 |
| 24 | 18 | 82 |
| 25 | 18 | 82 |
| 26 | 17 | 83 |
| 27 | 16 | 84 |
| 28 | 16 | 84 |
| 29 | 15 | 85 |
| 30 | 15 | 85 |
Wind in September
Winds average 5 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.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 6 | calm |
| 2 | 6 | calm |
| 3 | 6 | calm |
| 4 | 6 | calm |
| 5 | 6 | calm |
| 6 | 6 | calm |
| 7 | 6 | calm |
| 8 | 6 | calm |
| 9 | 6 | calm |
| 10 | 6 | calm |
| 11 | 6 | calm |
| 12 | 6 | calm |
| 13 | 6 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
Sunrise & sunset in September
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 6:39 AM to 6:35 AM, and sunset from 6:49 PM to 6:31 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.9 | 11.9 | 11.9 |
| Sunrise (AM) | 6:39 | 6:38 | 6:38 | 6:38 | 6:38 | 6:38 | 6:38 | 6:38 | 6:38 | 6:38 | 6:37 | 6:37 | 6:37 | 6:37 | 6:37 | 6:37 | 6:37 | 6:37 | 6:36 | 6:36 | 6:36 | 6:36 | 6:36 | 6:36 | 6:36 | 6:36 | 6:35 | 6:35 | 6:35 | 6:35 |
| Sunset (PM) | 6:49 | 6:48 | 6:47 | 6:47 | 6:46 | 6:46 | 6:45 | 6:45 | 6:44 | 6:43 | 6:43 | 6:42 | 6:41 | 6:41 | 6:40 | 6:40 | 6:39 | 6:38 | 6:38 | 6:37 | 6:37 | 6:36 | 6:35 | 6:35 | 6:34 | 6:34 | 6:33 | 6:32 | 6:32 | 6:31 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.2 | 6:39 | 6:49 |
| 2 | 12.2 | 6:38 | 6:48 |
| 3 | 12.2 | 6:38 | 6:47 |
| 4 | 12.1 | 6:38 | 6:47 |
| 5 | 12.1 | 6:38 | 6:46 |
| 6 | 12.1 | 6:38 | 6:46 |
| 7 | 12.1 | 6:38 | 6:45 |
| 8 | 12.1 | 6:38 | 6:45 |
| 9 | 12.1 | 6:38 | 6:44 |
| 10 | 12.1 | 6:38 | 6:43 |
| 11 | 12.1 | 6:37 | 6:43 |
| 12 | 12.1 | 6:37 | 6:42 |
| 13 | 12.1 | 6:37 | 6:41 |
| 14 | 12.1 | 6:37 | 6:41 |
| 15 | 12.1 | 6:37 | 6:40 |
| 16 | 12.0 | 6:37 | 6:40 |
| 17 | 12.0 | 6:37 | 6:39 |
| 18 | 12.0 | 6:37 | 6:38 |
| 19 | 12.0 | 6:36 | 6:38 |
| 20 | 12.0 | 6:36 | 6:37 |
| 21 | 12.0 | 6:36 | 6:37 |
| 22 | 12.0 | 6:36 | 6:36 |
| 23 | 12.0 | 6:36 | 6:35 |
| 24 | 12.0 | 6:36 | 6:35 |
| 25 | 12.0 | 6:36 | 6:34 |
| 26 | 12.0 | 6:36 | 6:34 |
| 27 | 12.0 | 6:35 | 6:33 |
| 28 | 11.9 | 6:35 | 6:32 |
| 29 | 11.9 | 6:35 | 6:32 |
| 30 | 11.9 | 6:35 | 6:31 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 4.13 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 — September's 4.13 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 3.7 | 3.8 | 3.8 | 3.8 | 3.8 | 3.9 | 3.9 | 3.9 | 4.0 | 4.0 | 4.0 | 4.0 | 4.1 | 4.1 | 4.1 | 4.2 | 4.2 | 4.2 | 4.2 | 4.3 | 4.3 | 4.3 | 4.3 | 4.4 | 4.4 | 4.4 | 4.5 | 4.5 | 4.5 | 4.5 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 3.7 | Moderate |
| 2 | 3.8 | Moderate |
| 3 | 3.8 | Moderate |
| 4 | 3.8 | Moderate |
| 5 | 3.8 | Moderate |
| 6 | 3.9 | Moderate |
| 7 | 3.9 | Moderate |
| 8 | 3.9 | Moderate |
| 9 | 4.0 | Moderate |
| 10 | 4.0 | Moderate |
| 11 | 4.0 | Bright |
| 12 | 4.0 | Bright |
| 13 | 4.1 | Bright |
| 14 | 4.1 | Bright |
| 15 | 4.1 | Bright |
| 16 | 4.2 | Bright |
| 17 | 4.2 | Bright |
| 18 | 4.2 | Bright |
| 19 | 4.2 | Bright |
| 20 | 4.3 | Bright |
| 21 | 4.3 | Bright |
| 22 | 4.3 | Bright |
| 23 | 4.3 | Bright |
| 24 | 4.4 | Bright |
| 25 | 4.4 | Bright |
| 26 | 4.4 | Bright |
| 27 | 4.5 | Bright |
| 28 | 4.5 | Bright |
| 29 | 4.5 | Bright |
| 30 | 4.5 | Bright |
Hazard calendar for Koidu
In September, Koidu sits inside its monsoon season. The full year is below, with each hazard's peak months called out.
Koidu's monsoon runs May–October, when most of the year's rain falls.
Koidu sees seasonal dust haze (February–April), heaviest in April.
Is September a good time to visit Koidu?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a weaker month for outdoor sightseeing in Koidu.
What to pack for Koidu in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Koidu sees daytime highs around 28°C and nights near 21°C. Pack light clothes and rain gear. About 29 days see rain.
UV index in Koidu in September
Clear-sky midday UV in September peaks around 13 (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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 10 | 12 | 13 | 11 | 12 | 12 | 12 | 13 | 13 | 12 | 9 | 8 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Very high |
| Feb | 12 | Extreme |
| Mar | 13 | Extreme |
| Apr | 11 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 12 | Extreme |
| Nov | 9 | Very high |
| Dec | 8 | Very high |
Air quality in Koidu in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 90 | 98 | 233 | 151 | 27 | 18 | 11 | 9 | 10 | 16 | 22 | 45 |
| Level | Unhealthy | Unhealthy | Very unhealthy | Very unhealthy | Moderate | Moderate | Good | Good | Good | Moderate | Moderate | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 90 | Unhealthy |
| Feb | 98 | Unhealthy |
| Mar | 233 | Very unhealthy |
| Apr | 151 | Very unhealthy |
| May | 27 | Moderate |
| Jun | 18 | Moderate |
| Jul | 11 | Good |
| Aug | 9 | Good |
| Sep | 10 | Good |
| Oct | 16 | Moderate |
| Nov | 22 | Moderate |
| Dec | 45 | Poor |
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.
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.
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
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).