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 »
  In São Tomé, in September, the average water temperature is 26°C (78.8°F). With the onset of September in São Tomé, a modest change to a still moderately hot 28.6°C (83.5°F) from August's 27.7°C (81.9°F) is noted in high-temperature.
• Neves - September »
  In Neves in September, it is raining for 15.8 days, with typically 35mm (1.38") of accumulated precipitation. September in Neves, São Tomé and Príncipe witnesses a mild increase in rainfall, indicating a shift towards the wetter season.
• Trindade - September »
  On the first day of September in Trindade sunrise is at 05:29 and sunset at 17:36. In Trindade, São Tomé and Príncipe, in September, it is raining for 15.8 days, with typically 35mm (1.38") of accumulated precipitation.
• Santa Cruz - September »
  In Santa Cruz, São Tomé and Príncipe, in September, during 15.8 rainfall days, 35mm (1.38") of precipitation is typically accumulated. In Santa Cruz, in September, during 15.8 rainfall days, 35mm (1.38") of precipitation is typically accumulated.
• Guadalupe - September »
  On the first day of September in Guadalupe sunrise is at 05:29 and sunset at 17:36. In September, the average relative humidity in Guadalupe, São Tomé and Príncipe, is 83%.
• Santo Antonio - September »
  In Santo Antonio, São Tomé and Príncipe, the average seawater temperature in September is 26°C (78.8°F). With an average of 2h of sunshine, September has the least sunshine of the year in Santo Antonio, São Tomé and Príncipe.
• Monte Cafe - September »
  In Monte Cafe in September, during 15.8 rainfall days, 35mm (1.38") of precipitation is typically accumulated. On the first day of September in Monte Cafe, sunrise is at 05:29 and sunset at 17:36.
• Ribeira Afonso - September »
  Ribeira Afonso marks the onset of September with an average high-temperature of a still warm 25.5°C (77.9°F), subtly divergent from August's 24.8°C (76.6°F). In September, the average sunshine duration in Ribeira Afonso is 5.4h.
• Santa Luzia - September »
  In Santa Luzia during September, the rain falls for 15.8 days and regularly aggregates up to 35mm (1.38") of precipitation. On the first day of September in Santa Luzia sunrise is at 05:29 and sunset at 17:37.
• Lemba - September »
  In Lemba, during September, the rain falls for 15.8 days and regularly aggregates up to 35mm (1.38") of precipitation. The average sunshine duration in September in Lemba is 5.4h.
• Cantagalo - September »
  In Cantagalo the average relative humidity in September is 83%. In Cantagalo, during September, the rain falls for 15.8 days and regularly aggregates up to 35mm (1.38") of precipitation.