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Monthly climate in Sao Tome, Brazil

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Sao Tome features a hot semi-arid climate (BSh). Temperatures typically range between 24 °C (76 °F) and 27 °C (82 °F) through the year, but rarely can drop to 19 °C (66 °F) or can rise to as high as 37 °C (99 °F). The average annual precipitation amounts to about 489 mm (19.3 inches) and receives 89 rainy days on the 1 mm (0.04 inches) threshold annually. Sao Tome enjoys an average of 3870 hours of sunshine throughout the year, and daylight varies from 11 hours 46 minutes to 12 hours 26 minutes per day.

Monthly average temperatures in Sao Tome, Brazil

The warmest months in Sao Tome are January, November and December, with daily mean temperatures ranging from 27 to 27 °C (81 - 82 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 24 to 25 °C (76 - 78 °F) throughout the day. On average each year, Sao Tome experiences 328 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Sao Tome. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum37°C
(99°F)		35°C
(96°F)		35°C
(95°F)		35°C
(95°F)		34°C
(94°F)		33°C
(92°F)		33°C
(91°F)		33°C
(92°F)		34°C
(94°F)		35°C
(95°F)		35°C
(95°F)		35°C
(96°F)
Mean maximum35°C
(96°F)		35°C
(95°F)		34°C
(93°F)		33°C
(92°F)		33°C
(91°F)		31°C
(89°F)		32°C
(89°F)		33°C
(91°F)		33°C
(92°F)		34°C
(94°F)		35°C
(95°F)		35°C
(95°F)
Average high33°C
(91°F)		32°C
(90°F)		32°C
(89°F)		31°C
(88°F)		30°C
(87°F)		30°C
(86°F)		29°C
(85°F)		31°C
(87°F)		32°C
(89°F)		33°C
(91°F)		33°C
(92°F)		33°C
(92°F)
Daily mean27°C
(81°F)		27°C
(81°F)		27°C
(80°F)		26°C
(80°F)		26°C
(79°F)		25°C
(78°F)		24°C
(76°F)		25°C
(77°F)		26°C
(79°F)		27°C
(80°F)		27°C
(81°F)		27°C
(82°F)
Average low23°C
(74°F)		23°C
(74°F)		23°C
(74°F)		23°C
(74°F)		22°C
(73°F)		21°C
(71°F)		21°C
(69°F)		21°C
(69°F)		21°C
(70°F)		22°C
(72°F)		23°C
(74°F)		23°C
(74°F)
Mean minimum22°C
(71°F)		22°C
(72°F)		22°C
(72°F)		22°C
(71°F)		21°C
(70°F)		20°C
(69°F)		19°C
(66°F)		19°C
(66°F)		19°C
(67°F)		20°C
(69°F)		21°C
(71°F)		22°C
(72°F)
Minimum21°C
(70°F)		20°C
(69°F)		22°C
(72°F)		21°C
(70°F)		20°C
(68°F)		19°C
(67°F)		19°C
(66°F)		19°C
(66°F)		19°C
(66°F)		20°C
(68°F)		20°C
(69°F)		21°C
(70°F)

Compare climate in Sao Tome with other places

Compare temperature, precipitation, sunshine, UV index in Sao Tome, Brazil with other places around the world.

Monthly average precipitation in Sao Tome, Brazil

Sao Tome usually has the most precipitation in February, March and April, with an average of 16 rainy days and 84 mm (3.3 inches) of precipitation per month. The driest months in Sao Tome are August, September and November. On average, 9 mm (0.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sao Tome. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)34 (1.3)80 (3.1)98 (3.9)75 (2.9)63 (2.5)33 (1.3)52 (2.1)8 (0.3)8 (0.3)11 (0.4)10 (0.4)18 (0.7)
Average precipitation days (≥ 1 mm)7141816115611226

Monthly sunshine hours in Sao Tome, Brazil

The sunniest months in Sao Tome are October, November and December, when the sun shines an average of 11 hours 18 minutes a day. Least sunny months in Sao Tome: January, February and April receive an average of 9 hours 45 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sao Tome. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours274296328306319314317341330346344349
Mean daily daylight hours12h 24m12h 16m12h 7m11h 57m11h 49m11h 46m11h 47m11h 54m12h 3m12h 13m12h 22m12h 26m

Solar UV radiation in Sao Tome, Brazil

Sao Tome experiences the highest level of ultraviolet (UV) radiation in March, April and December, when the maximum UV index can reach values of 14 - 15, which corresponds to the Extreme category of sun exposure. June, July and August are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 12. For more detailed information, check out our hourly Sao Tome UV Index data.

Average daily maximum UV levels by month for Sao Tome. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)141415141311111213131414