Bo weather in August

In August, Bo sees average daytime highs of 28°C and overnight lows near 22°C, with 476 mm of rain across 29.4 wet days and about 12.3 hours of daylight. It is the 12th-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 August, and the air most often feels oppressive.

Daylight stretches from about 12 h 24 min at the start of August to 12 h 12 min by month's end. Set against the rest of the year, August is Bo's 12th-clearest and 1st-windiest month. For the whole year in context, see Bo's year-round climate.

Daytime high: 28°; 12th warmest
Overnight low: 22°; 3rd coldest
Rainfall: 476 mm; 29.4 wet days
Daylight: 12 h 18 min; 6:43 AM – 6:59 PM
Cloud cover: 91%; 12th clearest
Wind: 6 km/h; 1st windiest
Solar energy: 3.29 kWh/m²
Travel score: 3.4; 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.

← July Bo year-round climate September →Best places to visit in August

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical August day in Bo reaches about 28°C in the afternoon and slips back to 22°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 30°C. Set against its neighbours, August runs on par with July and about 1°C cooler than September.

	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	31
Avg high (°C)	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28
Avg low (°C)	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22

	Avg high (°C)	Avg low (°C)
1	28	22
2	28	22
3	28	22
4	28	22
5	28	22
6	28	22
7	28	22
8	28	22
9	28	22
10	28	22
11	28	22
12	28	22
13	28	22
14	28	22
15	28	22
16	28	22
17	28	22
18	28	22
19	28	22
20	28	22
21	28	22
22	28	22
23	28	22
24	28	22
25	28	22
26	28	22
27	28	22
28	28	22
29	28	22
30	28	22
31	28	22

How August really feels in Bo

Once humidity and wind are folded in, August 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.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Bo weather by month

How August compares with the rest of the year at a glance. August is the 12th-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	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 August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in August, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 1% of August, with mostly cloudy or overcast conditions the remaining 99%.

	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	31
Clearer (%)	2	2	2	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Cloudier (%)	98	98	98	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99

	Clearer (%)	Cloudier (%)
1	2	98
2	2	98
3	2	98
4	1	99
5	1	99
6	1	99
7	1	99
8	1	99
9	1	99
10	1	99
11	1	99
12	1	99
13	1	99
14	1	99
15	1	99
16	1	99
17	1	99
18	1	99
19	1	99
20	1	99
21	1	99
22	1	99
23	1	99
24	1	99
25	1	99
26	1	99
27	1	99
28	1	99
29	1	99
30	1	99
31	1	99

Chance of precipitation in August

Any precipitation

Bo gets around 476 mm of rain over 29.4 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 95% 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	31
Rain chance (%)	92	92	92	93	93	93	93	94	94	94	94	94	94	94	94	94	95	95	95	95	95	96	96	96	96	97	97	97	97	97	97

	Rain chance (%)
1	92
2	92
3	92
4	93
5	93
6	93
7	93
8	94
9	94
10	94
11	94
12	94
13	94
14	94
15	94
16	94
17	95
18	95
19	95
20	95
21	95
22	96
23	96
24	96
25	96
26	97
27	97
28	97
29	97
30	97
31	97

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 96% 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	31
Muggy (%)	9	8	8	8	7	7	7	6	6	6	6	5	5	5	4	4	4	4	4	3	3	3	2	2	2	2	1	1	1	1	1
Oppressive (%)	91	92	92	92	93	93	93	94	94	94	94	95	95	95	96	96	96	96	96	97	97	97	98	98	98	98	99	99	99	99	99

	Muggy (%)	Oppressive (%)
1	9	91
2	8	92
3	8	92
4	8	92
5	7	93
6	7	93
7	7	93
8	6	94
9	6	94
10	6	94
11	6	94
12	5	95
13	5	95
14	5	95
15	4	96
16	4	96
17	4	96
18	4	96
19	4	96
20	3	97
21	3	97
22	3	97
23	2	98
24	2	98
25	2	98
26	2	98
27	1	99
28	1	99
29	1	99
30	1	99
31	1	99

Wind in August

Winds average 6 km/h in August, the windiest month of the year.

Across August, 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	31
Wind speed (km/h)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	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	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	6	calm
15	6	calm
16	6	calm
17	6	calm
18	6	calm
19	6	calm
20	6	calm
21	6	calm
22	6	calm
23	6	calm
24	5	calm
25	5	calm
26	5	calm
27	5	calm
28	5	calm
29	5	calm
30	5	calm
31	5	calm

Sunrise & sunset in August

DaylightNight

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

Days shrink by about 12 minutes over August. Sunrise moves from 6:42 AM to 6:42 AM, and sunset from 7:04 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	31
Daylight (h)	12.4	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	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
Sunrise (AM)	6:42	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:43	6:42	6:42	6:42	6:42
Sunset (PM)	7:04	7:03	7:03	7:03	7:03	7:02	7:02	7:02	7:01	7:01	7:01	7:00	7:00	7:00	6:59	6:59	6:59	6:58	6:58	6:57	6:57	6:56	6:56	6:55	6:55	6:54	6:54	6:53	6:53	6:52	6:52

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.4	6:42	7:04
2	12.3	6:43	7:03
3	12.3	6:43	7:03
4	12.3	6:43	7:03
5	12.3	6:43	7:03
6	12.3	6:43	7:02
7	12.3	6:43	7:02
8	12.3	6:43	7:02
9	12.3	6:43	7:01
10	12.3	6:43	7:01
11	12.3	6:43	7:01
12	12.3	6:43	7:00
13	12.3	6:43	7:00
14	12.3	6:43	7:00
15	12.3	6:43	6:59
16	12.3	6:43	6:59
17	12.3	6:43	6:59
18	12.3	6:43	6:58
19	12.2	6:43	6:58
20	12.2	6:43	6:57
21	12.2	6:43	6:57
22	12.2	6:43	6:56
23	12.2	6:43	6:56
24	12.2	6:43	6:55
25	12.2	6:43	6:55
26	12.2	6:43	6:54
27	12.2	6:43	6:54
28	12.2	6:42	6:53
29	12.2	6:42	6:53
30	12.2	6:42	6:52
31	12.2	6:42	6:52

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 3.29 kWh/m² — the year's lowest.

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 — August's 3.29 kWh/m² sits near the bottom.

	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	31
Solar energy (kWh/m²)	3.3	3.3	3.2	3.2	3.2	3.2	3.2	3.2	3.2	3.2	3.2	3.2	3.2	3.2	3.2	3.3	3.3	3.3	3.3	3.3	3.3	3.3	3.4	3.4	3.4	3.4	3.4	3.4	3.5	3.5	3.5
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	3.3	Moderate
2	3.3	Moderate
3	3.2	Moderate
4	3.2	Moderate
5	3.2	Moderate
6	3.2	Moderate
7	3.2	Moderate
8	3.2	Moderate
9	3.2	Moderate
10	3.2	Moderate
11	3.2	Moderate
12	3.2	Moderate
13	3.2	Moderate
14	3.2	Moderate
15	3.2	Moderate
16	3.3	Moderate
17	3.3	Moderate
18	3.3	Moderate
19	3.3	Moderate
20	3.3	Moderate
21	3.3	Moderate
22	3.3	Moderate
23	3.4	Moderate
24	3.4	Moderate
25	3.4	Moderate
26	3.4	Moderate
27	3.4	Moderate
28	3.4	Moderate
29	3.5	Moderate
30	3.5	Moderate
31	3.5	Moderate

Planning a trip in August

Hazard calendar for Bo

In seasonPeak

In August, Bo sits inside its monsoon 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.

Monsoon

Dust

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is August a good time to visit Bo?

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

3.4

Sightseeing

4th-best month of the year

3.6

Beach & pool

11th-best month of the year

August is a weaker month for outdoor sightseeing in Bo.

What to pack for Bo in August

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

In August, Bo sees daytime highs around 28°C and nights near 22°C. Pack light clothes and rain gear. About 29 days see rain.

light clothesrain gear

UV index in Bo in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 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 August

GoodModeratePoorUnhealthyVery unhealthy

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

Location & terrain

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.

3 km

93 m

artificial surfaces 56%

16 km

328 m

trees 51%

80 km

820 m

trees 63%

treesshrubsgrasslandartificial surfaceswaterwetlandmangroves

← July Bo year-round climate September →Best places to visit in August

August weather nearby: Bumpe 20 km · Njala 43 km · Kenema 61 km · Mile 91 77 km · Segbwema 87 km · Makeni 108 km · Koidu 113 km · Lunsar 119 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).

	Avg high (°C)	Avg low (°C)
1	28	22
2	28	22
3	28	22
4	28	22
5	28	22
6	28	22
7	28	22
8	28	22
9	28	22
10	28	22
11	28	22
12	28	22
13	28	22
14	28	22
15	28	22
16	28	22
17	28	22
18	28	22
19	28	22
20	28	22
21	28	22
22	28	22
23	28	22
24	28	22
25	28	22
26	28	22
27	28	22
28	28	22
29	28	22
30	28	22
31	28	22

	Clearer (%)	Cloudier (%)
1	2	98
2	2	98
3	2	98
4	1	99
5	1	99
6	1	99
7	1	99
8	1	99
9	1	99
10	1	99
11	1	99
12	1	99
13	1	99
14	1	99
15	1	99
16	1	99
17	1	99
18	1	99
19	1	99
20	1	99
21	1	99
22	1	99
23	1	99
24	1	99
25	1	99
26	1	99
27	1	99
28	1	99
29	1	99
30	1	99
31	1	99

	Rain chance (%)
1	92
2	92
3	92
4	93
5	93
6	93
7	93
8	94
9	94
10	94
11	94
12	94
13	94
14	94
15	94
16	94
17	95
18	95
19	95
20	95
21	95
22	96
23	96
24	96
25	96
26	97
27	97
28	97
29	97
30	97
31	97

	Muggy (%)	Oppressive (%)
1	9	91
2	8	92
3	8	92
4	8	92
5	7	93
6	7	93
7	7	93
8	6	94
9	6	94
10	6	94
11	6	94
12	5	95
13	5	95
14	5	95
15	4	96
16	4	96
17	4	96
18	4	96
19	4	96
20	3	97
21	3	97
22	3	97
23	2	98
24	2	98
25	2	98
26	2	98
27	1	99
28	1	99
29	1	99
30	1	99
31	1	99

	Avg high (°C)	Avg low (°C)
1	28	22
2	28	22
3	28	22
4	28	22
5	28	22
6	28	22
7	28	22
8	28	22
9	28	22
10	28	22
11	28	22
12	28	22
13	28	22
14	28	22
15	28	22
16	28	22
17	28	22
18	28	22
19	28	22
20	28	22
21	28	22
22	28	22
23	28	22
24	28	22
25	28	22
26	28	22
27	28	22
28	28	22
29	28	22
30	28	22
31	28	22

	Clearer (%)	Cloudier (%)
1	2	98
2	2	98
3	2	98
4	1	99
5	1	99
6	1	99
7	1	99
8	1	99
9	1	99
10	1	99
11	1	99
12	1	99
13	1	99
14	1	99
15	1	99
16	1	99
17	1	99
18	1	99
19	1	99
20	1	99
21	1	99
22	1	99
23	1	99
24	1	99
25	1	99
26	1	99
27	1	99
28	1	99
29	1	99
30	1	99
31	1	99

	Rain chance (%)
1	92
2	92
3	92
4	93
5	93
6	93
7	93
8	94
9	94
10	94
11	94
12	94
13	94
14	94
15	94
16	94
17	95
18	95
19	95
20	95
21	95
22	96
23	96
24	96
25	96
26	97
27	97
28	97
29	97
30	97
31	97

	Muggy (%)	Oppressive (%)
1	9	91
2	8	92
3	8	92
4	8	92
5	7	93
6	7	93
7	7	93
8	6	94
9	6	94
10	6	94
11	6	94
12	5	95
13	5	95
14	5	95
15	4	96
16	4	96
17	4	96
18	4	96
19	4	96
20	3	97
21	3	97
22	3	97
23	2	98
24	2	98
25	2	98
26	2	98
27	1	99
28	1	99
29	1	99
30	1	99
31	1	99

	Avg high (°C)	Avg low (°C)
1	28	22
2	28	22
3	28	22
4	28	22
5	28	22
6	28	22
7	28	22
8	28	22
9	28	22
10	28	22
11	28	22
12	28	22
13	28	22
14	28	22
15	28	22
16	28	22
17	28	22
18	28	22
19	28	22
20	28	22
21	28	22
22	28	22
23	28	22
24	28	22
25	28	22
26	28	22
27	28	22
28	28	22
29	28	22
30	28	22
31	28	22

	Clearer (%)	Cloudier (%)
1	2	98
2	2	98
3	2	98
4	1	99
5	1	99
6	1	99
7	1	99
8	1	99
9	1	99
10	1	99
11	1	99
12	1	99
13	1	99
14	1	99
15	1	99
16	1	99
17	1	99
18	1	99
19	1	99
20	1	99
21	1	99
22	1	99
23	1	99
24	1	99
25	1	99
26	1	99
27	1	99
28	1	99
29	1	99
30	1	99
31	1	99

	Rain chance (%)
1	92
2	92
3	92
4	93
5	93
6	93
7	93
8	94
9	94
10	94
11	94
12	94
13	94
14	94
15	94
16	94
17	95
18	95
19	95
20	95
21	95
22	96
23	96
24	96
25	96
26	97
27	97
28	97
29	97
30	97
31	97

	Muggy (%)	Oppressive (%)
1	9	91
2	8	92
3	8	92
4	8	92
5	7	93
6	7	93
7	7	93
8	6	94
9	6	94
10	6	94
11	6	94
12	5	95
13	5	95
14	5	95
15	4	96
16	4	96
17	4	96
18	4	96
19	4	96
20	3	97
21	3	97
22	3	97
23	2	98
24	2	98
25	2	98
26	2	98
27	1	99
28	1	99
29	1	99
30	1	99
31	1	99