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Sao Tome & Principe weather in September 2025
Expect 81°F daytime maximum temperatures in the shade with on average 2 hours of sunshine per day in Sao Tome & Principe in September. Check more long-term weather averages for Sao Tome & Principe in September before you book your next holiday to Sao Tome & Principe in 2025/2026.
- 81°F max day temperature
81 - 2 hours of sunshine per day
- 14 days with some rainfall
14 - 68°F min night temperature
68 - 12 hours of daylight per day
12 - Moderate heat & humidity
M - 3.1 inches of monthly rainfall
3.1 - 11+ (Extreme) UV index
11 - 79°F sea temperature
79
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Recommended for Sao Tome & Principe
The September weather guide for Sao Tome & Principe (Sao Tome) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Top Sao Tome & Principe destinations
Below are average maximum temperatures at popular countries, regions and places in Sao Tome & Principe in September. Select a holiday destination to see more weather parameters.
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Metric (°C) | Imperial (°F)
How hot is it in Sao Tome & Principe in September?
Daytime temperatures usually reach 81°F in Sao Tome, Sao Tome & Principe in September with moderate heat and humidity, falling to 68°F at night.
How sunny is it in Sao Tome & Principe in September?
There are normally 2 hours of bright sunshine each day in Sao Tome, Sao Tome & Principe in September - that's 18% of daylight hours.
How warm is the sea around Sao Tome & Principe in September?
The average sea temperature around Sao Tome, Sao Tome & Principe in September is 79°F.
Does it rain in Sao Tome & Principe in September?
There are usually 14 days with some rain in Sao Tome, Sao Tome & Principe in September and the average monthly rainfall is 3.1 inches.
Sao Tome & Principe September sunrise & sunset times
Browse the sunrise and sunset times for Sao Tome & Principe in September 2025. Select a month to view Sao Tome & Principe sunrise and sunset times for the next 12 months. The Sao Tome & Principe sunrise and sunset times shown below are for Sao Tome.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Monday, 1st September 2025 | 05:30 | 17:37 |
| Monday, 15th September 2025 | 05:25 | 17:32 |
| Tuesday, 30th September 2025 | 05:20 | 17:26 |
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