Bo weather in April
In April, Bo sees average daytime highs of 33°C and overnight lows near 24°C, with 120 mm of rain across 18.1 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.
Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 7% of the time in April, and the air most often feels oppressive.
Daylight stretches from about 12 h 06 min at the start of April to 12 h 18 min by month's end. Set against the rest of the year, April is Bo's 6th-clearest and 6th-windiest month. For the whole year in context, see Bo's year-round climate.
- Daytime high
- 33°
- 4th warmest
- Overnight low
- 24°
- 12th coldest
- Rainfall
- 120 mm
- 18.1 wet days
- Daylight
- 12 h 12 min
- 6:42 AM – 6:52 PM
- Cloud cover
- 76%
- 6th clearest
- Wind
- 5 km/h
- 6th windiest
- Solar energy
- 4.98 kWh/m²
- Travel score
- 2.9
- out of 10
Bo is city of Sierra Leone.
- Density
- 655/km²
- people per km²
- Founded
- 1787
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in April
Day-to-day highs hold fairly steady near 33°C through the month.
A typical April day in Bo reaches about 33°C in the afternoon and slips back to 24°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 35°C. Set against its neighbours, April runs about 2°C cooler than March and about 2°C warmer than May.
| 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) | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 |
| Avg low (°C) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 33 | 24 |
| 2 | 33 | 24 |
| 3 | 33 | 24 |
| 4 | 33 | 24 |
| 5 | 33 | 24 |
| 6 | 33 | 24 |
| 7 | 33 | 24 |
| 8 | 33 | 24 |
| 9 | 33 | 24 |
| 10 | 33 | 24 |
| 11 | 33 | 24 |
| 12 | 33 | 24 |
| 13 | 33 | 24 |
| 14 | 33 | 24 |
| 15 | 33 | 24 |
| 16 | 33 | 24 |
| 17 | 32 | 24 |
| 18 | 32 | 24 |
| 19 | 32 | 24 |
| 20 | 32 | 24 |
| 21 | 32 | 24 |
| 22 | 32 | 24 |
| 23 | 32 | 24 |
| 24 | 32 | 24 |
| 25 | 32 | 24 |
| 26 | 32 | 24 |
| 27 | 32 | 24 |
| 28 | 32 | 24 |
| 29 | 32 | 24 |
| 30 | 32 | 24 |
How April really feels in Bo
Once humidity and wind are folded in, April averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in April is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Bo weather by month
How April compares with the rest of the year at a glance. April is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 33° / 22° | 17 | 3.7 | 11.6 | 4.1 |
| Feb | 35° / 23° | 20 | 4.7 | 11.7 | 3.1 |
| Mar | 34° / 24° | 56 | 11.4 | 11.9 | 2.8 |
| Apr | 33° / 24° | 120 | 18.1 | 12.2 | 2.9 |
| May | 31° / 23° | 246 | 27 | 12.4 | 2.7 |
| Jun | 29° / 23° | 333 | 28.9 | 12.5 | 2.8 |
| Jul | 28° / 22° | 396 | 29.1 | 12.4 | 3.3 |
| Aug | 28° / 22° | 476 | 29.4 | 12.3 | 3.4 |
| Sep | 28° / 22° | 433 | 29.3 | 12 | 3.0 |
| Oct | 29° / 22° | 245 | 29.2 | 11.8 | 2.9 |
| Nov | 30° / 22° | 103 | 19.3 | 11.6 | 3.9 |
| Dec | 31° / 22° | 26 | 6.4 | 11.5 | 5.0 |
Cloud cover in April
The sky is clear or mostly clear about 7% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 15% of April, with mostly cloudy or overcast conditions the remaining 78%. Skies tend to cloud over as the month goes on.
| 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 (%) | 31 | 30 | 30 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 27 | 25 | 25 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 19 | 18 | 16 | 16 | 15 | 15 | 14 | 13 | 13 | 12 |
| Cloudier (%) | 69 | 70 | 70 | 71 | 71 | 72 | 72 | 72 | 72 | 72 | 73 | 75 | 75 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 81 | 82 | 84 | 84 | 85 | 85 | 86 | 87 | 87 | 88 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 31 | 69 |
| 2 | 30 | 70 |
| 3 | 30 | 70 |
| 4 | 29 | 71 |
| 5 | 29 | 71 |
| 6 | 28 | 72 |
| 7 | 28 | 72 |
| 8 | 28 | 72 |
| 9 | 28 | 72 |
| 10 | 28 | 72 |
| 11 | 27 | 73 |
| 12 | 25 | 75 |
| 13 | 25 | 75 |
| 14 | 25 | 75 |
| 15 | 24 | 76 |
| 16 | 23 | 77 |
| 17 | 22 | 78 |
| 18 | 21 | 79 |
| 19 | 20 | 80 |
| 20 | 19 | 81 |
| 21 | 19 | 81 |
| 22 | 18 | 82 |
| 23 | 16 | 84 |
| 24 | 16 | 84 |
| 25 | 15 | 85 |
| 26 | 15 | 85 |
| 27 | 14 | 86 |
| 28 | 13 | 87 |
| 29 | 13 | 87 |
| 30 | 12 | 88 |
Chance of precipitation in April
Bo gets around 120 mm of rain over 18.1 wet days in April. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 60% and peaks near 75% on the wettest days. The odds climb toward the end of the month.
| 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 (%) | 50 | 51 | 51 | 52 | 53 | 53 | 54 | 54 | 55 | 55 | 56 | 56 | 57 | 58 | 58 | 59 | 59 | 60 | 61 | 62 | 63 | 64 | 66 | 67 | 69 | 70 | 71 | 72 | 73 | 75 |
| Rain chance (%) | |
|---|---|
| 1 | 50 |
| 2 | 51 |
| 3 | 51 |
| 4 | 52 |
| 5 | 53 |
| 6 | 53 |
| 7 | 54 |
| 8 | 54 |
| 9 | 55 |
| 10 | 55 |
| 11 | 56 |
| 12 | 56 |
| 13 | 57 |
| 14 | 58 |
| 15 | 58 |
| 16 | 59 |
| 17 | 59 |
| 18 | 60 |
| 19 | 61 |
| 20 | 62 |
| 21 | 63 |
| 22 | 64 |
| 23 | 66 |
| 24 | 67 |
| 25 | 69 |
| 26 | 70 |
| 27 | 71 |
| 28 | 72 |
| 29 | 73 |
| 30 | 75 |
Humidity in April
Most of April feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, April lands in the oppressive band about 63% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Muggy (%) | 11 | 11 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 |
| Oppressive (%) | 67 | 66 | 67 | 66 | 66 | 64 | 65 | 64 | 63 | 64 | 63 | 62 | 64 | 63 | 63 | 62 | 61 | 62 | 61 | 62 | 61 | 61 | 61 | 61 | 61 | 60 | 61 | 61 | 60 | 60 |
| Miserable (%) | 21 | 22 | 22 | 23 | 24 | 25 | 25 | 26 | 27 | 27 | 28 | 29 | 29 | 30 | 31 | 32 | 33 | 33 | 34 | 34 | 35 | 36 | 36 | 37 | 37 | 38 | 38 | 38 | 39 | 39 |
| Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|
| 1 | 1 | 11 | 67 | 21 |
| 2 | 1 | 11 | 66 | 22 |
| 3 | 1 | 10 | 67 | 22 |
| 4 | 1 | 10 | 66 | 23 |
| 5 | 0 | 10 | 66 | 24 |
| 6 | 1 | 10 | 64 | 25 |
| 7 | 1 | 9 | 65 | 25 |
| 8 | 1 | 9 | 64 | 26 |
| 9 | 1 | 9 | 63 | 27 |
| 10 | 1 | 8 | 64 | 27 |
| 11 | 1 | 8 | 63 | 28 |
| 12 | 1 | 8 | 62 | 29 |
| 13 | 0 | 7 | 64 | 29 |
| 14 | 0 | 7 | 63 | 30 |
| 15 | 0 | 6 | 63 | 31 |
| 16 | 0 | 6 | 62 | 32 |
| 17 | 0 | 6 | 61 | 33 |
| 18 | 0 | 5 | 62 | 33 |
| 19 | 0 | 5 | 61 | 34 |
| 20 | 0 | 4 | 62 | 34 |
| 21 | 0 | 4 | 61 | 35 |
| 22 | 0 | 3 | 61 | 36 |
| 23 | 0 | 3 | 61 | 36 |
| 24 | 0 | 2 | 61 | 37 |
| 25 | 0 | 2 | 61 | 37 |
| 26 | 0 | 2 | 60 | 38 |
| 27 | 0 | 1 | 61 | 38 |
| 28 | 0 | 1 | 61 | 38 |
| 29 | 0 | 1 | 60 | 39 |
| 30 | 0 | 1 | 60 | 39 |
Wind in April
Winds average 5 km/h in April.
Across April, 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.
| 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) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 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 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | 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 April
Daylight runs from about 12 h 06 min at the start of April to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 12 minutes over April. Sunrise moves from 6:50 AM to 6:36 AM, and sunset from 6:54 PM to 6:52 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) | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.3 | 12.3 | 12.3 | 12.3 |
| Sunrise (AM) | 6:50 | 6:49 | 6:49 | 6:48 | 6:47 | 6:47 | 6:46 | 6:46 | 6:45 | 6:45 | 6:44 | 6:44 | 6:43 | 6:43 | 6:42 | 6:42 | 6:41 | 6:41 | 6:41 | 6:40 | 6:40 | 6:39 | 6:39 | 6:38 | 6:38 | 6:38 | 6:37 | 6:37 | 6:37 | 6:36 |
| Sunset (PM) | 6:54 | 6:53 | 6:53 | 6:53 | 6:53 | 6:53 | 6:53 | 6:53 | 6:53 | 6:53 | 6:53 | 6:53 | 6:53 | 6:53 | 6:52 | 6:52 | 6:52 | 6:52 | 6:52 | 6:52 | 6:52 | 6:52 | 6:52 | 6:52 | 6:52 | 6:52 | 6:52 | 6:52 | 6:52 | 6:52 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.1 | 6:50 | 6:54 |
| 2 | 12.1 | 6:49 | 6:53 |
| 3 | 12.1 | 6:49 | 6:53 |
| 4 | 12.1 | 6:48 | 6:53 |
| 5 | 12.1 | 6:47 | 6:53 |
| 6 | 12.1 | 6:47 | 6:53 |
| 7 | 12.1 | 6:46 | 6:53 |
| 8 | 12.1 | 6:46 | 6:53 |
| 9 | 12.1 | 6:45 | 6:53 |
| 10 | 12.1 | 6:45 | 6:53 |
| 11 | 12.1 | 6:44 | 6:53 |
| 12 | 12.1 | 6:44 | 6:53 |
| 13 | 12.2 | 6:43 | 6:53 |
| 14 | 12.2 | 6:43 | 6:53 |
| 15 | 12.2 | 6:42 | 6:52 |
| 16 | 12.2 | 6:42 | 6:52 |
| 17 | 12.2 | 6:41 | 6:52 |
| 18 | 12.2 | 6:41 | 6:52 |
| 19 | 12.2 | 6:41 | 6:52 |
| 20 | 12.2 | 6:40 | 6:52 |
| 21 | 12.2 | 6:40 | 6:52 |
| 22 | 12.2 | 6:39 | 6:52 |
| 23 | 12.2 | 6:39 | 6:52 |
| 24 | 12.2 | 6:38 | 6:52 |
| 25 | 12.2 | 6:38 | 6:52 |
| 26 | 12.2 | 6:38 | 6:52 |
| 27 | 12.3 | 6:37 | 6:52 |
| 28 | 12.3 | 6:37 | 6:52 |
| 29 | 12.3 | 6:37 | 6:52 |
| 30 | 12.3 | 6:36 | 6:52 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 4.98 kWh/m².
For context, solar energy here swings from a low near 3.29 kWh/m² to a high of 5.6 kWh/m² in February across the year — April's 4.98 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) | 5.3 | 5.3 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.0 | 5.0 | 5.0 | 5.0 | 4.9 | 4.9 | 4.9 | 4.8 | 4.8 | 4.8 | 4.8 | 4.7 | 4.7 | 4.7 | 4.6 | 4.6 | 4.6 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | 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 | 5.3 | Bright |
| 2 | 5.3 | Bright |
| 3 | 5.2 | Bright |
| 4 | 5.2 | Bright |
| 5 | 5.2 | Bright |
| 6 | 5.2 | Bright |
| 7 | 5.2 | Bright |
| 8 | 5.2 | Bright |
| 9 | 5.1 | Bright |
| 10 | 5.1 | Bright |
| 11 | 5.1 | Bright |
| 12 | 5.1 | Bright |
| 13 | 5.1 | Bright |
| 14 | 5.0 | Bright |
| 15 | 5.0 | Bright |
| 16 | 5.0 | Bright |
| 17 | 5.0 | Bright |
| 18 | 4.9 | Bright |
| 19 | 4.9 | Bright |
| 20 | 4.9 | Bright |
| 21 | 4.8 | Bright |
| 22 | 4.8 | Bright |
| 23 | 4.8 | Bright |
| 24 | 4.8 | Bright |
| 25 | 4.7 | Bright |
| 26 | 4.7 | Bright |
| 27 | 4.7 | Bright |
| 28 | 4.6 | Bright |
| 29 | 4.6 | Bright |
| 30 | 4.6 | Bright |
Hazard calendar for Bo
In April, Bo sits inside its dust season. The full year is below, with each hazard's peak months called out.
Bo's monsoon runs May–October, when most of the year's rain falls.
Bo sees seasonal dust haze (February–April), heaviest in February.
Is April a good time to visit Bo?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is a weaker month for outdoor sightseeing in Bo.
What to pack for Bo in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Bo sees daytime highs around 33°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.
UV index in Bo in April
Clear-sky midday UV in April peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Bo peaks around August 22 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 10 | 11 | 12 | 10 | 12 | 11 | 11 | 13 | 13 | 12 | 9 | 8 |
| Level | Very high | Extreme | Extreme | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Very high |
| Feb | 11 | Extreme |
| Mar | 12 | Extreme |
| Apr | 10 | Very high |
| May | 12 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 12 | Extreme |
| Nov | 9 | Very high |
| Dec | 8 | Very high |
Air quality in Bo in April
Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.
Air quality in Bo 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 70 | 77 | 194 | 202 | 33 | 19 | 13 | 10 | 11 | 17 | 25 | 50 |
| Level | Unhealthy | Unhealthy | Very unhealthy | Very unhealthy | Moderate | Moderate | Moderate | Good | Good | Moderate | Moderate | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 70 | Unhealthy |
| Feb | 77 | Unhealthy |
| Mar | 194 | Very unhealthy |
| Apr | 202 | Very unhealthy |
| May | 33 | Moderate |
| Jun | 19 | Moderate |
| Jul | 13 | Moderate |
| Aug | 10 | Good |
| Sep | 11 | Good |
| Oct | 17 | Moderate |
| Nov | 25 | Moderate |
| Dec | 50 | Poor |
Where is Bo?
Bo sits at 8.0°N, 11.7°W, 104 m above sea level, in Sierra Leone. The nearest listed city is Bumpe, 20 km away.
Topography around Bo
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bo.
Within 3 km, the terrain around Bo has only modest variations in elevation — a maximum elevation change of 93 m around an average of 93 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 328 m; within 80 km, large variations in elevation — a maximum elevation change of 820 m.
The land around Bo is covered by artificial surfaces (56%) and trees (22%) within 3 km, trees (51%) and shrubs (35%) within 16 km, and trees (63%) and shrubs (20%) 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 Bo (7.9647°, -11.7383°, elevation 104 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).