Sao Tome, Sao Tome and Principe Climate & Monthly Averages
The climate of Sao Tome
Sao Tome has a tropical wet-and-dry climate, marked by year-round warmth split between a rainy season and a pronounced dry season. Average daytime highs range from about 80°F (27°C) in August to around 85°F (29°C) in March, and the city records roughly 272 days of measurable precipitation a year.
Climate quick facts
- Hottest month: March - highs near 85°F (29°C)
- Coldest month: August - highs near 80°F (27°C)
- Record high: 90°F (32°C) · Record low: 68°F (20°C) (2015–2024)
- Wettest month: October (27 rainy days) · Sunniest: June (9.6 h sun/day)
- Climate type: tropical wet-and-dry - year-round warmth split between a rainy season and a pronounced dry season
Temperatures through the year
The warmest stretch of the year centers on March. Highs average 85°F (29°C) and overnight lows stay near 78°F (26°C). The coolest month is August, with typical highs of 80°F (27°C) and lows around 74°F (23°C). Based on 2015–2024 weather data, temperatures have reached as high as 90°F (32°C) and dropped as low as 68°F (20°C).
Rain, sun and snow
October is usually the wettest month. It brings about 15.6 inches (396 mm) of rain over 27 days, while July is the driest. June brings the most sunshine, averaging 9.6 hours of sun a day.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 83° | 77° | 26 | 9.0 in | 9.4 h/day | 87% |
| February | 84° | 78° | 24 | 8.2 in | 9.4 h/day | 86% |
| March | 85° | 78° | 24 | 9.7 in | 8.6 h/day | 86% |
| April | 85° | 78° | 24 | 9.1 in | 8.8 h/day | 86% |
| May | 83° | 78° | 23 | 8.8 in | 8.6 h/day | 86% |
| June | 82° | 75° | 13 | 2.9 in | 9.6 h/day | 84% |
| July | 81° | 74° | 14 | 2.3 in | 9.2 h/day | 83% |
| August | 80° | 74° | 19 | 4.8 in | 8.5 h/day | 84% |
| September | 81° | 75° | 24 | 9.2 in | 8.4 h/day | 86% |
| October | 81° | 76° | 27 | 15.6 in | 8.3 h/day | 88% |
| November | 82° | 76° | 26 | 13.3 in | 8.6 h/day | 88% |
| December | 82° | 77° | 28 | 11.8 in | 8.8 h/day | 88% |
Sao Tome month by month
Sao Tome weather in January
January brings highs around 83°F (28°C), lows near 77°F (25°C), about 26 wet days.
Sao Tome weather in February
February brings highs around 84°F (29°C), lows near 78°F (25°C), about 24 wet days.
Sao Tome weather in March
March brings highs around 85°F (29°C), lows near 78°F (26°C), about 24 wet days - typically the hottest month of the year in Sao Tome.
Sao Tome weather in April
April brings highs around 85°F (29°C), lows near 78°F (26°C), about 24 wet days.
Sao Tome weather in May
May brings highs around 83°F (29°C), lows near 78°F (25°C), about 23 wet days.
Sao Tome weather in June
June brings highs around 82°F (28°C), lows near 75°F (24°C), about 13 wet days - typically the sunniest month of the year in Sao Tome.
Sao Tome weather in July
July brings highs around 81°F (27°C), lows near 74°F (23°C), about 14 wet days - typically the driest month of the year in Sao Tome.
Sao Tome weather in August
August brings highs around 80°F (27°C), lows near 74°F (23°C), about 19 wet days - typically the coldest month of the year in Sao Tome.
Sao Tome weather in September
September brings highs around 81°F (27°C), lows near 75°F (24°C), about 24 wet days.
Sao Tome weather in October
October brings highs around 81°F (27°C), lows near 76°F (24°C), about 27 wet days - typically the wettest month of the year in Sao Tome.
Sao Tome weather in November
November brings highs around 82°F (28°C), lows near 76°F (25°C), about 26 wet days.
Sao Tome weather in December
December brings highs around 82°F (28°C), lows near 77°F (25°C), about 28 wet days.
Seasons in Sao Tome
March through May
March through May in Sao Tome brings hot afternoons, with daytime highs averaging 84°F (29°C) and nights around 78°F (25°C); expect showers on roughly 71 days across the season. With the humidity factored in, afternoons often feel hotter than the thermometer reads - run the numbers through the humidity and dew point converter to see why.
June through August
June through August in Sao Tome brings hot afternoons, with daytime highs averaging 81°F (27°C) and nights around 74°F (24°C); expect showers on roughly 46 days across the season.
September through November
September through November in Sao Tome is hot, with daytime highs averaging 81°F (27°C) and nights around 76°F (24°C); expect showers on roughly 77 days across the season.
December through February
December through February in Sao Tome is hot, with daytime highs averaging 83°F (28°C) and nights around 77°F (25°C); expect showers on roughly 78 days across the season.
Climate questions, answered
What is the average temperature in Sao Tome?
Is Sao Tome hot in summer?
Is Sao Tome cold in winter?
How many rainy days does Sao Tome get in a year?
Best time to visit Sao Tome
The best time to visit Sao Tome is generally May to September and January, when these months combine the driest skies with the most comfortable heat. Daytime temperatures in that window typically sit near 82°F (28°C).
Pack for Sao Tome with a compact umbrella or rain shell - showers are a regular feature; moisture-wicking fabrics to cope with the humidity. Evenings can feel noticeably cooler than afternoons - March nights average 78°F (26°C).
Sao Tome temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.