Climate averages 1991–2020
Porto-Novo weather
in August.
A warm, wet month: the coolest and the joint 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Porto-Novo: daytime highs average 26.8°C and nights cool to about 23.1°C. By daytime temperature it is the coolest month of the year.
Expect about 98 mm of rain on roughly 16 days, which makes August a wet month (the joint 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 20 min on an average August day.
The nearest other city in this atlas is Ekpé (14 km away). In August its highs average 26.2°C, 0.5°C cooler than Porto-Novo, with 98 mm of rain.
Among the 8 cities listed in Benin, Porto-Novo ranks 5th of 8 for the warmest August highs and joint 3rd of 8 for the driest August (rainfall, lowest first). The mean August high of those 8 cities is 27.1°C; Porto-Novo is 0.4°C cooler than that mean.
From August to September, average highs rise by 0.7°C to 27.5°C, and monthly rainfall rises from 98 mm to 144 mm.
The annual picture
August 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
Porto-Novo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.8°C24.4°C | 24.4°C | 29 | 8.4 | 11.812 h |
| February | 31.2°C25.5°C | 25.5°C | 40 | 11.2 | 11.912 h |
| March | 31.0°C26.1°C | 26.1°C | 73 | 17.5 | 12.112 h |
| April | 30.6°C25.9°C | 25.9°C | 98 | 18.9 | 12.312 h |
| May | 29.6°C25.2°C | 25.2°C | 171 | 24.9 | 12.412 h |
| June | 28.0°C24.1°C | 24.1°C | 229 | 26.2 | 12.512 h |
| July | 27.1°C23.5°C | 23.5°C | 140 | 21.4 | 12.512 h |
| August, selected | 26.8°C23.1°C | 23.1°C | 98 | 16.2 | 12.312 h |
| September | 27.5°C23.5°C | 23.5°C | 144 | 22.2 | 12.212 h |
| October | 28.6°C24.1°C | 24.1°C | 155 | 25.4 | 12.012 h |
| November | 29.7°C24.9°C | 24.9°C | 75 | 18.6 | 11.812 h |
| December | 30.5°C24.7°C | 24.7°C | 37 | 10.4 | 11.812 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
August in nearby cities
- Ekpé in AugustBenin · 14 kmHigh 26.2°C · Low 23.5°C · 98 mm rain
- Cotonou in AugustBenin · 25 kmHigh 26.1°C · Low 23.6°C · 73 mm rain
- Godomè in AugustBenin · 31 kmHigh 26.4°C · Low 23.4°C · 96 mm rain
- Irewe in AugustNigeria · 60 kmHigh 26.2°C · Low 23.6°C · 124 mm rain
- Alasia in AugustNigeria · 63 kmHigh 26.3°C · Low 23.2°C · 124 mm rain
- Ota in AugustNigeria · 73 kmHigh 27.3°C · Low 22.4°C · 142 mm rain
- Ifo in AugustNigeria · 74 kmHigh 27.6°C · Low 22.3°C · 142 mm rain
- Ajegunle in AugustNigeria · 81 kmHigh 26.6°C · Low 23.5°C · 124 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 Porto-Novo) is explained once on the Porto-Novo year overview and on the Sources, method and limits page.
Ekpé lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.