São Tomé in september: average Weather, Temperature and Climate
Weather in São Tomé in september 2025
The weather in São Tomé in the month of september comes from statistical datas on the last years. You can view the weather statistics the entire month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
tolerable weather UV index: 7
Weather at 6am
77°F
Moderate rain at times
38% of time
30%
26%
7%
Weather at 12pm
77°F
Moderate rain at times
37% of time
36%
20%
7%
Weather at 6pm
81°F
Partly Cloudy
40% of time
32%
20%
5%
Weather at 3am
81°F
40%
29%
28%
4%
Evolution of daily average temperature and precipitation in São Tomé in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in São Tomé in september.
The climate of São Tomé in september is tolerable
the weather in São Tomé in september is rather dry (with 3.1in of precipitation over 5 days). Unfortunately, the weather conditions is worsening than the previous month since in august there is an average of 1.7in of rainfall over 2 days.
The climate quite enjoyable here september. Temperatures are up to 81°F. The seasonal minimum is 77°F. Thus, the mean temperature average in september in São Tomé is 79°F. Note that seasonal normals are in contrast with those observed in São Tomé in the month of september with a maximum record of 83°F in 2009 and a minimum record of 74°F in 2010.
In september in São Tomé, the days on average last 12:07. The sun rises at 05:25 and sunset is at 17:32.
With a good climate, this month is a good month to go in that area in São Tomé and Príncipe.
Seasonal average climate and temperature of São Tomé in september
Check below seasonal norms These datas are set from the weather statements of the last years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 79°F | ||||
| Highest temperature | 81°F | ||||
| Lowest temperature | 77°F | ||||
| Highest record temperature | 83°F (2009) | ||||
| Lowest record temperature | 74°F (2010) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Wind | |||||
| Wind speed | 18km/h | ||||
| Wind temperature | 77°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 3.1in | ||||
| Number of days with rainfall | 5 day(s) (16%) | ||||
| Record daily rainfall | 2.3in (2016) | ||||
| Other climate data | |||||
| Humidity | 84% | ||||
| Visibility | 9.76km | ||||
| Cloud cover | 60% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 9 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:25 | ||||
| Time of sunset | 17:32 | ||||
| Length of day | 12:07 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last september?
Here is the day by day recorded weather in São Tomé in september 2024:
74°F to 77°F
76°F to 79°F
76°F to 77°F
76°F to 79°F
76°F to 79°F
76°F to 79°F
76°F to 79°F
76°F to 79°F
76°F to 79°F
76°F to 77°F
76°F to 77°F
76°F to 79°F
76°F to 79°F
76°F to 77°F
76°F to 77°F
76°F to 79°F
76°F to 79°F
77°F to 79°F
77°F to 79°F
77°F to 79°F
77°F to 79°F
77°F to 79°F
77°F to 79°F
77°F to 79°F
76°F to 79°F
77°F to 79°F
77°F to 79°F
76°F to 79°F
77°F to 77°F
77°F to 79°F
Map: other cities in Sao Tome and Principe in september
Cities near São Tomé:
| Santo Amaro in september | tolerable weather |
| Trindade in september | tolerable weather |
| Santana in september | tolerable weather |
| Neves in september | tolerable weather |
| São João dos Angolares in september | tolerable weather |
| Santa Catarina in september | tolerable weather |
| Monte Mario in september | tolerable weather |
| Santo António in september | tolerable weather |
Click over cities on the map for information about the weather in september.
São Tomé
perfect weather
good
tolerable
bad
very bad
Weather data for São Tomé in september:
Weather data for São Tomé for september are derived from an average of the weather forecast since 2009 in São Tomé. There is a margin of error and these forecasts are to be considered as general information only. The weather in São Tomé can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to São Tomé.