September weather forecast
São Tomé and Príncipe

September in São Tomé and Príncipe marks the tail end of the dry season, with rainfall levels beginning to increase slightly, though they remain relatively low. Typical precipitation levels for September range from 30mm (1.18") to 60mm (2.36").

The temperatures during September continue to be steady, usually ranging from 22°C (71.6°F) to 30°C (86°F). This range is consistent across the islands, including in the coastal cities of São Tomé and Santo Antonio. As always, the higher altitude areas, such as those within the Obo National Park, may experience slightly cooler temperatures due to their elevation.

As September transitions into October, there is a noticeable increase in rainfall, indicating the onset of the rainy season. However, temperatures remain largely consistent, maintaining the islands' characteristic tropical climate. Even though the dry season is coming to an end, the weather in September continues to be favourable for outdoor activities and exploration, making it an attractive month for tourism.

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• São Tomé - September »
  On the first day of September in São Tomé, sunrise is at 05:29 and sunset at 17:36. In São Tomé, during September, the rain falls for 6 days and regularly aggregates up to 17mm (0.67") of precipitation.
• Neves - September »
  On the first day of September in Neves sunrise is at 05:30 and sunset at 17:37. In Neves in September, it is raining for 15.8 days, with typically 35mm (1.38") of accumulated precipitation.
• Trindade - September »
  On the first day of September in Trindade sunrise is at 05:29 and sunset at 17:36. On the last day of September, in Trindade sunrise is at 05:20 and sunset at 17:26 GMT.
• Santa Cruz - September »
  On the first day of September in Santa Cruz sunrise is at 05:30 and sunset at 17:37. In Santa Cruz the average sunshine duration in September is 5.4h.
• Guadalupe - September »
  Guadalupe sees a minor drop to an average minimum temperature of 24.6°C (76.3°F) during the night in the month of September. In Guadalupe, in September, it is raining for 15.8 days, with typically 35mm (1.38") of accumulated precipitation.
• Santo Antonio - September »
  In September, the average sea temperature in Santo Antonio is 26°C (78.8°F). In September, in Santo Antonio, São Tomé and Príncipe, the rain falls for 21 days.
• Monte Cafe - September »
  In Monte Cafe, São Tomé and Príncipe, the average relative humidity in September is 83%. The average sunshine duration in September in Monte Cafe is 5.4h.
• Ribeira Afonso - September »
  September temperatures in Ribeira Afonso vary between a high-temperature of 25.5°C (77.9°F) and a low-temperature of 24.6°C (76.3°F). In Ribeira Afonso the average length of the day in September is 12h and 7min.
• Santa Luzia - September »
  On the first day of September in Santa Luzia sunrise is at 05:29 and sunset at 17:37. In September, in Santa Luzia the rain falls for 15.8 days.
• Lemba - September »
  On the last day of September, in Lemba sunrise is at 05:20 and sunset at 17:27 GMT. In Lemba, in September, during 15.8 rainfall days, 35mm (1.38") of precipitation is typically accumulated.
• Cantagalo - September »
  In Cantagalo, during September, the rain falls for 15.8 days and regularly aggregates up to 35mm (1.38") of precipitation. In Cantagalo, in September, it is raining for 15.8 days, with typically 35mm (1.38") of accumulated precipitation.