Grand-Popo Weather in September
Grand-Popo in September sees high daytime temperatures of 29°C (84°F) and nighttime lows of 24°C (75°F). Rainfall is fairly high this month at around 139 mm (5.5 in), so pack a rain jacket to stay dry.
Rainfall in Grand-Popo in September
Historically, September sees about 11 days of rain, with a monthly average of 139 mm (5.5 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Grand-Popo in September
If you're visiting Grand-Popo in September, expect highs of 29°C (84°F) and overnight lows around 24°C (75°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With lows around 24°C (75°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Grand-Popo in September
The month experiences a moderate amount of sunlight, with 165 hours of sunshine. This provides a nice balance between sunshine and clouds.If you prefer dry days with pleasant temperatures, August typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Grand-Popo Temperature in September
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Grand-Popo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Grand-Popo - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Grand-Popo typically stay consistent throughout September, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Grand-Popo in September
Browse day-by-day weather records for Grand-Popo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Grand-Popo historical weather extremes in September
The extremes listed below come from historical weather data collected in Grand-Popo from 1997 through 2025.
- On September 28, 2003, temperatures climbed to 33°C (91°F), marking the warmest September day on record.
- Grand-Popo experienced its chilliest September day on September 19, 2002, reaching only 25°C (77°F).
- Nighttime temperatures dropped to 18°C (64°F) on September 25, 2002, marking the coldest September night on record.
- Peak precipitation in September occurred on September 7, 2018, when 74 mm (2.9 in) of precipitation was measured.
Best Places in Benin in September
Find out more about the weather in Benin and which places have the best travel conditions in this month. See all of Benin in September →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Grand-Popo in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Grand-Popo in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Grand-Popo 3-Day Forecast
Temperature Rainfall Sunshine Humidity
See the full Grand-Popo climate overview or explore weather in Benin.
Popular in September
Where to go in September - average daytime high across popular destinations.
Dassa-Zoumé
31°C (88°F) Abomey30°C (86°F) Allada30°C (86°F) Ganvié29°C (84°F) Abomey-Calavi29°C (84°F) Ouidah
29°C (84°F) Cococodji28°C (82°F) Cotonou28°C (82°F) 
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