Climate averages 1991–2020
Soyo weather
in September.
A warm, very dry month: the 10th warmest and the 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Soyo: daytime highs average 24.4°C and nights cool to about 22.1°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 2.1 mm of rain on fewer than one day, which makes September a very dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 04 min on an average September day.
The nearest other city in this atlas is Moanda, Democratic Republic of the Congo (23 km away). In September its highs average 25.6°C, 1.2°C warmer than Soyo, with 4.2 mm of rain.
Among the 47 cities listed in Angola, Soyo ranks 44th of 47 for the warmest September highs and joint 9th of 47 for the driest September (rainfall, lowest first). The mean September high of those 47 cities is 29.0°C; Soyo is 4.6°C cooler than that mean.
From September to October, average highs rise by 1.7°C to 26.0°C, and monthly rainfall rises from 2.1 mm to 18 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Soyo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.6°C25.1°C | 25.1°C | 87 | 13.9 | 12.412 h |
| February | 28.2°C25.5°C | 25.5°C | 94 | 13.5 | 12.312 h |
| March | 28.6°C25.9°C | 25.9°C | 94 | 14.2 | 12.112 h |
| April | 28.1°C25.5°C | 25.5°C | 100 | 14.3 | 12.012 h |
| May | 26.9°C24.6°C | 24.6°C | 25 | 4.3 | 11.812 h |
| June | 24.7°C22.3°C | 22.3°C | 0.2 | 0.0 | 11.812 h |
| July | 23.2°C20.6°C | 20.6°C | 0.2 | 0.0 | 11.812 h |
| August | 23.1°C20.6°C | 20.6°C | 1.2 | 0.2 | 11.912 h |
| September, selected | 24.4°C22.1°C | 22.1°C | 2.1 | 0.7 | 12.112 h |
| October | 26.0°C23.9°C | 23.9°C | 18 | 4.1 | 12.212 h |
| November | 27.0°C24.8°C | 24.8°C | 64 | 11.5 | 12.412 h |
| December | 27.2°C24.9°C | 24.9°C | 79 | 12.4 | 12.512 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Moanda, Democratic Republic of the Congo in SeptemberDemocratic Republic of the Congo · 23 kmHigh 25.6°C · Low 21.5°C · 4.2 mm rain
- Cabinda in SeptemberAngola · 67 kmHigh 25.7°C · Low 22.0°C · 9.0 mm rain
- Boma in SeptemberDemocratic Republic of the Congo · 82 kmHigh 28.2°C · Low 20.8°C · 12 mm rain
- Matadi in SeptemberDemocratic Republic of the Congo · 125 kmHigh 27.7°C · Low 20.3°C · 12 mm rain
- Pointe-Noire in SeptemberRepublic of the Congo · 161 kmHigh 26.1°C · Low 21.7°C · 6.3 mm rain
- Mbanza Kongo in SeptemberAngola · 207 kmHigh 27.9°C · Low 18.9°C · 11 mm rain
- Dolisie in SeptemberRepublic of the Congo · 218 kmHigh 27.9°C · Low 20.3°C · 18 mm rain
- Kimpese in SeptemberDemocratic Republic of the Congo · 237 kmHigh 29.3°C · Low 20.4°C · 11 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Soyo) is explained once on the Soyo year overview and on the Sources, method and limits page.