Weathermondo.com
Sao Tome and PrincipeThe weather in September in São Tomé
It's hot in September in São Tomé with an average temperature of 30°C. Temperatures this month range from a low of 28°C to a high of 30°C. At night, you can expect temperatures between 24°C and 25°C.
September is a good month to be in São Tomé for sunny weather. You’ll have high temperatures and not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for São Tomé, Sao Tome and Principe. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 33°C in 2021, São Tomé reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 24°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of 21°C to a highest value of 26°C.
Rainfall amount
In September, there is an average of 45 mm of precipitation, spread over 9 days. The wind speed is around 4 Bft, mostly coming from the South.
Daily weather in September for São Tomé
Click on any day in September to get detailed info about the usual weather on that day in São Tomé. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| São Tomé | New York | |
|---|---|---|
| Average temperature | 30°C | 27°C |
| Max. temperature | 30°C | 31°C |
| Min. temperature | 24°C | -5°C |
| Total precipitation | 45 mm | 57 mm |
| Rainy days | 9 days | 9 days |
Start of September
The month of September starts in São Tomé with hot temps, averaging around 30°C during the day and nights around 24°C.
Mid September
By mid-September, daytime temps stay steady at around 30°C, with nights around 25°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in São Tomé is around 30°C, while nighttime temps are about 25°C. A shower might pop up, but overall, the weather will be dry and sunny.
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of São Tomé for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in São Tomé, Sao Tome and Principe. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in São Tomé
Temperature in September in São Tomé over the years
Precipitation charts
These charts show the average amount of precipitation in September in São Tomé, Sao Tome and Principe. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in São Tomé
Total precipitation in September in São Tomé over the years
Daily UV index in September in São Tomé
This chart shows the average daily UV index in September in São Tomé, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in São Tomé
Have you been to São Tomé in September?
Share your weather experience in September in São Tomé.
Average weather in São Tomé by month
Click on a month below to see detailed weather info for São Tomé. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.