Weather in Sao Vicente Island in September 2025
- September is usually the wettest month of the year in Sao Vicente Island;
Average weather
Average temperature in Sao Vicente Island in September
The temperature in September is +81°F on average, with a range between a maximum of +82°F during the day and a minimum of +77°F at night.
The average maximum temperature goes down 33% by the end of the month, compared with the beginning of the month, from +81°F to +79°F.
Is Sao Vicente Island warm or cold in September?
Sao Vicente Island is typically warm in September.
Maximum temperatures go up compared to the previous month from +77°F to +79°F. The minimum temperature also goes up from +75°F to +75°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
September is one of the warmest months in Sao Vicente Island, here is the comparison with other months:
Climate in Sao Vicente Island in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +77°F | +79°F | +79°F | ||||
| Min. temperature | ||||||
| +70°F | +73°F | +72°F | ||||
| Max. temperature | ||||||
| +90°F | +90°F | +91°F | ||||
| Rainfall | ||||||
| 14 mm | 26 mm | 15 mm | ||||
| Wind | ||||||
| 5 m/s | 6 m/s | 6 m/s | ||||
| Humidity | ||||||
| 83% | 83% | 81% | ||||
| Air pressure | ||||||
| 1012 HPa | 1013 HPa | 1013 HPa | ||||
| Sunny days | ||||||
| 7 | 8 | 9 | ||||
| Cloudy days | ||||||
| 20 | 16 | 20 | ||||
| Rainy days | ||||||
| 4 | 6 | 2 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as good as in August. It’s getting warmer as September arrives. The average maximum temperature goes up from +77°F to +79°F during the day. Prepare for more rain. Average rainfall goes from 14 mm to 26 mm. Humidity levels don’t change as the month goes on, averaging around 83%. Winds are stronger in comparison to August, going up from 5 m/s to 6 m/s on average. The good news is there are likely to be more sunny days in September, from 7 to 8.
October brings much the same weather, it remains good.
Wind
The average wind speed is 6 m/s getting up to 10 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Sao Vicente Island is gradually increasing during September, going from 6 m/s to 6 m/s over the course of the month.
Rain
How was the weather last September in Sao Vicente Island?
Climate Change Over the Years
The climate in Sao Vicente Island in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1986 (+71°F) and the highest in 2017 (+80°F). The driest year was 1992 with only 13 mm of rainfall, and the wettest year was 2010 with 219 mm.
FAQ
Is September a good time to visit Sao Vicente Island?
Can you sunbathe in Sao Vicente Island in September?
Is Sao Vicente Island rainy in September?
Is it sunny in Sao Vicente Island in September?
Monthly weather in Sao Vicente Island
Source of the data
For this page, we’ve looked at the typical weather in Sao Vicente Island, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.