Soyo weather in September
In September, Soyo sees average daytime highs of 23°C and overnight lows near 22°C, with 2 mm of rain across 0.7 wet days and about 12 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.
Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 27% of the time in September, and the air most often feels muggy.
Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Soyo's 5th-clearest and 3rd-windiest month. For the whole year in context, see Soyo's year-round climate.
- Daytime high
- 23°
- 10th warmest
- Overnight low
- 22°
- 3rd coldest
- Rainfall
- 2 mm
- 0.7 wet days
- Daylight
- 12 hours
- 6:06 AM – 6:04 PM
- Cloud cover
- 58%
- 5th clearest
- Wind
- 16 km/h
- 3rd windiest
- Solar energy
- 4.69 kWh/m²
- Travel score
- 8.2
- out of 10
Temperature in September
Day-to-day highs hold fairly steady near 23°C through the month.
A typical September day in Soyo reaches about 23°C in the afternoon and slips back to 22°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 24°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°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) | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 22 | 22 |
| 2 | 22 | 22 |
| 3 | 22 | 22 |
| 4 | 22 | 22 |
| 5 | 22 | 22 |
| 6 | 22 | 22 |
| 7 | 23 | 22 |
| 8 | 23 | 22 |
| 9 | 23 | 22 |
| 10 | 23 | 22 |
| 11 | 23 | 22 |
| 12 | 23 | 22 |
| 13 | 23 | 22 |
| 14 | 23 | 22 |
| 15 | 23 | 22 |
| 16 | 23 | 22 |
| 17 | 23 | 23 |
| 18 | 23 | 23 |
| 19 | 23 | 23 |
| 20 | 23 | 23 |
| 21 | 23 | 23 |
| 22 | 23 | 23 |
| 23 | 23 | 23 |
| 24 | 24 | 23 |
| 25 | 24 | 23 |
| 26 | 24 | 23 |
| 27 | 24 | 23 |
| 28 | 24 | 23 |
| 29 | 24 | 23 |
| 30 | 24 | 23 |
How September really feels in Soyo
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.
Soyo weather by month
How September compares with the rest of the year at a glance. September is the 10th-warmest and 9th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 26° | 87 | 13.9 | 12.3 | 5.7 |
| Feb | 28° / 26° | 89 | 13.4 | 12.2 | 5.5 |
| Mar | 28° / 27° | 94 | 14.2 | 12 | 5.5 |
| Apr | 27° / 26° | 100 | 14.4 | 11.9 | 5.6 |
| May | 26° / 25° | 25 | 4.3 | 11.7 | 7.6 |
| Jun | 24° / 23° | 0 | 0 | 11.7 | 8.8 |
| Jul | 22° / 21° | 0 | 0 | 11.7 | 8.3 |
| Aug | 22° / 21° | 1 | 0.2 | 11.8 | 8.1 |
| Sep | 23° / 22° | 2 | 0.7 | 12 | 8.2 |
| Oct | 25° / 24° | 18 | 4.1 | 12.1 | 7.6 |
| Nov | 26° / 25° | 64 | 11.5 | 12.3 | 6.3 |
| Dec | 26° / 25° | 79 | 12.4 | 12.3 | 6.0 |
Cloud cover in September
The sky is clear or mostly clear about 27% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 26% of September, with mostly cloudy or overcast conditions the remaining 47%.
| 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 (%) | 50 | 50 | 50 | 51 | 51 | 52 | 53 | 53 | 54 | 54 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 53 | 53 | 53 | 53 | 52 | 52 | 52 | 52 | 52 | 51 | 52 | 52 | 51 |
| Cloudier (%) | 50 | 50 | 50 | 49 | 49 | 48 | 47 | 47 | 46 | 46 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 47 | 47 | 47 | 47 | 48 | 48 | 48 | 48 | 48 | 49 | 48 | 48 | 49 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 50 | 50 |
| 2 | 50 | 50 |
| 3 | 50 | 50 |
| 4 | 51 | 49 |
| 5 | 51 | 49 |
| 6 | 52 | 48 |
| 7 | 53 | 47 |
| 8 | 53 | 47 |
| 9 | 54 | 46 |
| 10 | 54 | 46 |
| 11 | 55 | 45 |
| 12 | 55 | 45 |
| 13 | 55 | 45 |
| 14 | 55 | 45 |
| 15 | 55 | 45 |
| 16 | 55 | 45 |
| 17 | 55 | 45 |
| 18 | 53 | 47 |
| 19 | 53 | 47 |
| 20 | 53 | 47 |
| 21 | 53 | 47 |
| 22 | 52 | 48 |
| 23 | 52 | 48 |
| 24 | 52 | 48 |
| 25 | 52 | 48 |
| 26 | 52 | 48 |
| 27 | 51 | 49 |
| 28 | 52 | 48 |
| 29 | 52 | 48 |
| 30 | 51 | 49 |
Chance of precipitation in September
Soyo gets around 2 mm of rain over 0.7 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 2% and peaks near 3% 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 (%) | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Rain chance (%) | |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 2 |
| 8 | 2 |
| 9 | 2 |
| 10 | 2 |
| 11 | 2 |
| 12 | 2 |
| 13 | 2 |
| 14 | 2 |
| 15 | 2 |
| 16 | 2 |
| 17 | 3 |
| 18 | 3 |
| 19 | 3 |
| 20 | 3 |
| 21 | 3 |
| 22 | 3 |
| 23 | 3 |
| 24 | 3 |
| 25 | 3 |
| 26 | 3 |
| 27 | 3 |
| 28 | 3 |
| 29 | 3 |
| 30 | 3 |
Humidity in September
Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the muggy band about 70% 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 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Muggy (%) | 89 | 89 | 89 | 89 | 88 | 87 | 86 | 85 | 83 | 81 | 79 | 77 | 75 | 74 | 72 | 70 | 68 | 66 | 64 | 62 | 60 | 58 | 57 | 55 | 53 | 52 | 50 | 48 | 46 | 44 |
| Oppressive (%) | 10 | 10 | 10 | 11 | 12 | 13 | 14 | 15 | 17 | 19 | 21 | 23 | 25 | 26 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 43 | 45 | 47 | 48 | 50 | 52 | 54 | 56 |
| Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|
| 1 | 1 | 89 | 10 |
| 2 | 1 | 89 | 10 |
| 3 | 1 | 89 | 10 |
| 4 | 0 | 89 | 11 |
| 5 | 0 | 88 | 12 |
| 6 | 0 | 87 | 13 |
| 7 | 0 | 86 | 14 |
| 8 | 0 | 85 | 15 |
| 9 | 0 | 83 | 17 |
| 10 | 0 | 81 | 19 |
| 11 | 0 | 79 | 21 |
| 12 | 0 | 77 | 23 |
| 13 | 0 | 75 | 25 |
| 14 | 0 | 74 | 26 |
| 15 | 0 | 72 | 28 |
| 16 | 0 | 70 | 30 |
| 17 | 0 | 68 | 32 |
| 18 | 0 | 66 | 34 |
| 19 | 0 | 64 | 36 |
| 20 | 0 | 62 | 38 |
| 21 | 0 | 60 | 40 |
| 22 | 0 | 58 | 42 |
| 23 | 0 | 57 | 43 |
| 24 | 0 | 55 | 45 |
| 25 | 0 | 53 | 47 |
| 26 | 0 | 52 | 48 |
| 27 | 0 | 50 | 50 |
| 28 | 0 | 48 | 52 |
| 29 | 0 | 46 | 54 |
| 30 | 0 | 44 | 56 |
Wind in September
Winds average 16 km/h in September.
Across September, daily wind ranges from about 14 km/h on the calmest days to 17 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) | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 14 | light breeze |
| 2 | 14 | light breeze |
| 3 | 15 | light breeze |
| 4 | 15 | light breeze |
| 5 | 15 | light breeze |
| 6 | 15 | light breeze |
| 7 | 15 | light breeze |
| 8 | 15 | light breeze |
| 9 | 15 | light breeze |
| 10 | 15 | light breeze |
| 11 | 15 | light breeze |
| 12 | 15 | light breeze |
| 13 | 16 | light breeze |
| 14 | 16 | light breeze |
| 15 | 16 | light breeze |
| 16 | 16 | light breeze |
| 17 | 16 | light breeze |
| 18 | 16 | light breeze |
| 19 | 16 | light breeze |
| 20 | 16 | light breeze |
| 21 | 16 | light breeze |
| 22 | 16 | light breeze |
| 23 | 17 | light breeze |
| 24 | 17 | light breeze |
| 25 | 17 | light breeze |
| 26 | 17 | light breeze |
| 27 | 17 | light breeze |
| 28 | 17 | light breeze |
| 29 | 17 | light breeze |
| 30 | 17 | light breeze |
Sunrise & sunset in September
Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 6 minutes over September. Sunrise moves from 6:14 AM to 5:58 AM, and sunset from 6:07 PM to 6:01 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) | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Sunrise (AM) | 6:14 | 6:13 | 6:13 | 6:12 | 6:12 | 6:11 | 6:11 | 6:10 | 6:10 | 6:09 | 6:09 | 6:08 | 6:07 | 6:07 | 6:06 | 6:06 | 6:05 | 6:05 | 6:04 | 6:04 | 6:03 | 6:03 | 6:02 | 6:02 | 6:01 | 6:00 | 6:00 | 5:59 | 5:59 | 5:58 |
| Sunset (PM) | 6:07 | 6:07 | 6:06 | 6:06 | 6:06 | 6:06 | 6:06 | 6:05 | 6:05 | 6:05 | 6:05 | 6:05 | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:03 | 6:03 | 6:03 | 6:03 | 6:03 | 6:02 | 6:02 | 6:02 | 6:02 | 6:02 | 6:02 | 6:01 | 6:01 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.9 | 6:14 | 6:07 |
| 2 | 11.9 | 6:13 | 6:07 |
| 3 | 11.9 | 6:13 | 6:06 |
| 4 | 11.9 | 6:12 | 6:06 |
| 5 | 11.9 | 6:12 | 6:06 |
| 6 | 11.9 | 6:11 | 6:06 |
| 7 | 11.9 | 6:11 | 6:06 |
| 8 | 11.9 | 6:10 | 6:05 |
| 9 | 11.9 | 6:10 | 6:05 |
| 10 | 11.9 | 6:09 | 6:05 |
| 11 | 11.9 | 6:09 | 6:05 |
| 12 | 11.9 | 6:08 | 6:05 |
| 13 | 11.9 | 6:07 | 6:04 |
| 14 | 12.0 | 6:07 | 6:04 |
| 15 | 12.0 | 6:06 | 6:04 |
| 16 | 12.0 | 6:06 | 6:04 |
| 17 | 12.0 | 6:05 | 6:04 |
| 18 | 12.0 | 6:05 | 6:03 |
| 19 | 12.0 | 6:04 | 6:03 |
| 20 | 12.0 | 6:04 | 6:03 |
| 21 | 12.0 | 6:03 | 6:03 |
| 22 | 12.0 | 6:03 | 6:03 |
| 23 | 12.0 | 6:02 | 6:02 |
| 24 | 12.0 | 6:02 | 6:02 |
| 25 | 12.0 | 6:01 | 6:02 |
| 26 | 12.0 | 6:00 | 6:02 |
| 27 | 12.0 | 6:00 | 6:02 |
| 28 | 12.0 | 5:59 | 6:02 |
| 29 | 12.0 | 5:59 | 6:01 |
| 30 | 12.0 | 5:58 | 6:01 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 4.69 kWh/m².
For context, solar energy here swings from a low near 4.41 kWh/m² to a high of 5.33 kWh/m² in February across the year — September's 4.69 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) | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.8 |
| 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 | 4.6 | Bright |
| 2 | 4.6 | Bright |
| 3 | 4.6 | Bright |
| 4 | 4.6 | Bright |
| 5 | 4.6 | Bright |
| 6 | 4.6 | Bright |
| 7 | 4.6 | Bright |
| 8 | 4.6 | Bright |
| 9 | 4.7 | Bright |
| 10 | 4.7 | Bright |
| 11 | 4.7 | Bright |
| 12 | 4.7 | Bright |
| 13 | 4.7 | Bright |
| 14 | 4.7 | Bright |
| 15 | 4.7 | Bright |
| 16 | 4.7 | Bright |
| 17 | 4.7 | Bright |
| 18 | 4.7 | Bright |
| 19 | 4.7 | Bright |
| 20 | 4.7 | Bright |
| 21 | 4.7 | Bright |
| 22 | 4.7 | Bright |
| 23 | 4.7 | Bright |
| 24 | 4.7 | Bright |
| 25 | 4.7 | Bright |
| 26 | 4.7 | Bright |
| 27 | 4.8 | Bright |
| 28 | 4.8 | Bright |
| 29 | 4.8 | Bright |
| 30 | 4.8 | Bright |
Hazard calendar for Soyo
None of Soyo's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Soyo's rainy season runs November–April, when most of the year's rain falls.
Is September a good time to visit Soyo?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is one of the better times to visit Soyo for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Soyo in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Soyo sees daytime highs around 23°C and nights near 22°C. Worth packing: light clothes and sun protection.
Sea temperature near Soyo in September
The nearest coast averages about 23°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 27 km away) is warmest in March at about 28°C and coldest in August near 21°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 28 | 28 | 28 | 26 | 23 | 22 | 21 | 23 | 25 | 26 | 27 |
| Comfort | Warm | Tropical | Tropical | Warm | Warm | Refreshing | Refreshing | Refreshing | Refreshing | Warm | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 28 | Tropical |
| Mar | 28 | Tropical |
| Apr | 28 | Warm |
| May | 26 | Warm |
| Jun | 23 | Refreshing |
| Jul | 22 | Refreshing |
| Aug | 21 | Refreshing |
| Sep | 23 | Refreshing |
| Oct | 25 | Warm |
| Nov | 26 | Warm |
| Dec | 27 | Warm |
UV index in Soyo in September
Clear-sky midday UV in September 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 Soyo peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 10 at about 6 (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) | 14 | 13 | 15 | 12 | 9 | 7 | 6 | 6 | 10 | 13 | 11 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | High | High | High | Very high | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 13 | Extreme |
| Mar | 15 | Extreme |
| Apr | 12 | Extreme |
| May | 9 | Very high |
| Jun | 7 | High |
| Jul | 6 | High |
| Aug | 6 | High |
| Sep | 10 | Very high |
| Oct | 13 | Extreme |
| Nov | 11 | Extreme |
| Dec | 10 | Extreme |
Air quality in Soyo 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 Soyo is worst in July — around 22 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (November, 8 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) | 10 | 11 | 9 | 10 | 15 | 19 | 22 | 18 | 11 | 8 | 8 | 9 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 11 | Good |
| Mar | 9 | Good |
| Apr | 10 | Good |
| May | 15 | Moderate |
| Jun | 19 | Moderate |
| Jul | 22 | Moderate |
| Aug | 18 | Moderate |
| Sep | 11 | Good |
| Oct | 8 | Good |
| Nov | 8 | Good |
| Dec | 9 | Good |
Where is Soyo?
Soyo sits at 6.1°S, 12.4°E, 10 m above sea level, in Angola. The nearest listed city is Moanda, 23 km away.
Topography around Soyo
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Soyo.
Within 3 km, the terrain around Soyo has only modest variations in elevation — a maximum elevation change of 24 m around an average of 2 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 139 m; within 80 km, significant variations in elevation — a maximum elevation change of 314 m.
The land around Soyo is covered by artificial surfaces (31%), mangroves (30%) and water (22%) within 3 km, water (52%) within 16 km, and water (39%), trees (29%) and grassland (26%) within 80 km.
Angola travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 220 V · 50 Hz
- Prices
- ≈ 35% of US
- price level, 2025
- GDP per capita
- $3,129
- 2025
- Happiness
- 3.8 / 10
- World Happiness, 2017
- Homicide rate
- 4.1
- per 100k, 2016
- Road deaths
- 26.1
- per 100k/yr, 2019
- Income group
- Lower middle
- World Bank
- English
- Very low
- EF EPI 413
- 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 Soyo (-6.1349°, 12.3689°, elevation 10 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).