Lagos Weather in September
Lagos in September averages 25°C (77°F) during the day and 18°C (64°F) at night. This is part of the summer season. Some rainfall is to be expected.
Rainfall in Lagos in September
You can expect rain on around 3 days based on historical patterns, with 21 mm (0.8 in) average for the month. When rain does fall this month, it tends to come down hard. The low number of rain days makes each shower more significant.
Temperature in Lagos in September
Lagos in September is worth a visit. The temperature is perfect, with 25°C (77°F) during the day and 18°C (64°F) at night. During September, the summer season is in full swing. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 18°C (64°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Lagos in September
The month enjoys around 267 hours of sunshine, creating mostly sunny days with good weather conditions.If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Lagos.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Portugal, check out our Lagos's climate page.
Lagos Temperature in September
Min Temperature
18°C (64°F)
Max Temperature
25°C (77°F)
Chance of Rain
9%
Precipitation
21 mm (0.8 in)
Rainy days
3 days
Sunshine
267 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Lagos typically stay consistent throughout September, with daily highs averaging around 25°C (77°F). Nights are pleasant, with lows around 18°C (64°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 for Lagos in September
Browse day-by-day weather records for Lagos spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Lagos historical weather extremes in September
The extremes listed below come from historical weather data collected in Lagos from 1976 through 2025.
- On September 27, 1983, temperatures climbed to 37°C (99°F), marking the warmest September day on record.
- The lowest daytime temperature in September was 19°C (66°F), recorded on September 22, 1994.
- The lowest overnight temperature recorded in September was 11°C (52°F) (September 26, 1982).
Best Places in Portugal in September
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Lagos in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Pack a light rain jacket or compact umbrella for occasional showers. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Lagos in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Portugal, check out our Lagos's climate page.
See the full Lagos climate overview or explore weather in Portugal.
