Climate averages 1991–2020
Nkayi weather
in September.
A hot, very dry month: the joint 8th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Nkayi: daytime highs average 29.8°C and nights cool to about 21.4°C. By daytime temperature it is the joint 8th warmest of the 12 months.
Expect about 11 mm of rain on roughly 3 days, which makes September a very dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 05 min on an average September day.
The nearest other city in this atlas is Dolisie (69 km away). In September its highs average 27.9°C, 1.9°C cooler than Nkayi, with 18 mm of rain.
Among the 4 cities listed in the Republic of the Congo, Nkayi ranks 2nd of 4 for the warmest September highs and 2nd of 4 for the driest September (rainfall, lowest first). The mean September high of those 4 cities is 28.8°C; Nkayi is 1.1°C warmer than that mean.
From September to October, average highs rise by 1.1°C to 30.9°C, and monthly rainfall rises from 11 mm to 83 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
Nkayi climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.2°C22.6°C | 22.6°C | 135 | 22.4 | 12.312 h |
| February | 30.8°C22.9°C | 22.9°C | 120 | 18.9 | 12.212 h |
| March | 31.0°C23.1°C | 23.1°C | 125 | 20.7 | 12.112 h |
| April | 30.5°C23.0°C | 23.0°C | 150 | 21.5 | 12.012 h |
| May | 30.2°C22.8°C | 22.8°C | 69 | 13.8 | 11.912 h |
| June | 29.0°C20.8°C | 20.8°C | 2.7 | 0.6 | 11.912 h |
| July | 28.8°C19.5°C | 19.5°C | 0.9 | 0.2 | 11.912 h |
| August | 28.9°C20.0°C | 20.0°C | 2.5 | 0.7 | 12.012 h |
| September, selected | 29.8°C21.4°C | 21.4°C | 11 | 3.2 | 12.112 h |
| October | 30.9°C22.7°C | 22.7°C | 83 | 15.1 | 12.212 h |
| November | 30.2°C22.6°C | 22.6°C | 158 | 24.3 | 12.312 h |
| December | 29.8°C22.5°C | 22.5°C | 175 | 25.1 | 12.412 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
- Dolisie in SeptemberRepublic of the Congo · 69 kmHigh 27.9°C · Low 20.3°C · 18 mm rain
- Pointe-Noire in SeptemberRepublic of the Congo · 171 kmHigh 26.1°C · Low 21.7°C · 6.3 mm rain
- Matadi in SeptemberDemocratic Republic of the Congo · 185 kmHigh 27.7°C · Low 20.3°C · 12 mm rain
- Boma in SeptemberDemocratic Republic of the Congo · 187 kmHigh 28.2°C · Low 20.8°C · 12 mm rain
- Cabinda in SeptemberAngola · 195 kmHigh 25.7°C · Low 22.0°C · 9.0 mm rain
- Kimpese in SeptemberDemocratic Republic of the Congo · 199 kmHigh 29.3°C · Low 20.4°C · 11 mm rain
- Mbanza-Ngungu in SeptemberDemocratic Republic of the Congo · 211 kmHigh 27.9°C · Low 18.5°C · 18 mm rain
- Moanda, Democratic Republic of the Congo in SeptemberDemocratic Republic of the Congo · 219 kmHigh 25.6°C · Low 21.5°C · 4.2 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 Nkayi) is explained once on the Nkayi year overview and on the Sources, method and limits page.