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Monthly climate in Santa Helena, Brazil

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Santa Helena features a tropical monsoon climate (Am). Temperatures typically range between 26 °C (79 °F) and 28 °C (83 °F) through the year, but rarely can drop to 20 °C (69 °F) or can rise to as high as 36 °C (96 °F). The average annual precipitation amounts to about 2126 mm (83.7 inches) and receives 232 rainy days on the 1 mm (0.04 inches) threshold annually. Santa Helena enjoys an average of 3491 hours of sunshine throughout the year, and daylight varies from 11 hours 59 minutes to 12 hours 14 minutes per day.

Monthly average temperatures in Santa Helena, Brazil

The warmest months in Santa Helena are October, November and December, with daily mean temperatures ranging from 28 to 28 °C (82 - 83 °F) throughout the day. The coldest temperatures usually occur in March, April and July, when daily mean temperatures range from 26 to 26 °C (79 - 80 °F) throughout the day. On average each year, Santa Helena experiences 329 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 Santa Helena. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum34°C
(93°F)		33°C
(92°F)		33°C
(91°F)		34°C
(93°F)		33°C
(92°F)		32°C
(91°F)		32°C
(90°F)		33°C
(92°F)		34°C
(94°F)		35°C
(96°F)		35°C
(95°F)		36°C
(96°F)
Mean maximum33°C
(92°F)		33°C
(91°F)		32°C
(90°F)		32°C
(90°F)		32°C
(91°F)		31°C
(89°F)		32°C
(89°F)		32°C
(90°F)		33°C
(92°F)		34°C
(94°F)		34°C
(94°F)		34°C
(93°F)
Average high31°C
(87°F)		30°C
(86°F)		30°C
(86°F)		30°C
(86°F)		30°C
(87°F)		30°C
(87°F)		30°C
(87°F)		31°C
(88°F)		32°C
(90°F)		33°C
(91°F)		33°C
(91°F)		32°C
(90°F)
Daily mean27°C
(80°F)		26°C
(80°F)		26°C
(79°F)		26°C
(80°F)		27°C
(80°F)		27°C
(80°F)		26°C
(80°F)		27°C
(80°F)		27°C
(82°F)		28°C
(83°F)		28°C
(83°F)		28°C
(82°F)
Average low24°C
(75°F)		24°C
(75°F)		24°C
(75°F)		24°C
(75°F)		24°C
(75°F)		23°C
(74°F)		23°C
(73°F)		23°C
(74°F)		24°C
(75°F)		24°C
(76°F)		24°C
(76°F)		24°C
(76°F)
Mean minimum23°C
(73°F)		23°C
(73°F)		23°C
(73°F)		23°C
(73°F)		23°C
(73°F)		22°C
(73°F)		21°C
(70°F)		21°C
(71°F)		23°C
(73°F)		23°C
(73°F)		23°C
(74°F)		23°C
(74°F)
Minimum23°C
(73°F)		22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		22°C
(73°F)		22°C
(71°F)		21°C
(69°F)		20°C
(69°F)		22°C
(72°F)		22°C
(72°F)		23°C
(73°F)		22°C
(72°F)

Compare climate in Santa Helena with other places

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

Monthly average precipitation in Santa Helena, Brazil

Santa Helena usually has the most precipitation in February, March and April, with an average of 28 rainy days and 400 mm (15.7 inches) of precipitation per month. The driest months in Santa Helena are August, September and October. On average, 34 mm (1.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Santa Helena. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)186 (7.3)371 (14.6)413 (16.3)416 (16.4)251 (9.9)140 (5.5)88 (3.5)46 (1.8)26 (1.0)31 (1.2)57 (2.2)102 (4.0)
Average precipitation days (≥ 1 mm)242630292724181377918

Monthly sunshine hours in Santa Helena, Brazil

The sunniest months in Santa Helena are July, August and October, when the sun shines an average of 11 hours 5 minutes a day. Least sunny months in Santa Helena: January, February and April receive an average of 7 hours 22 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Santa Helena. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours223214233225282315338346338346322304
Mean daily daylight hours12h 13m12h 9m12h 6m12h 2m12h 0m11h 59m11h 59m12h 1m12h 4m12h 8m12h 12m12h 14m

Solar UV radiation in Santa Helena, Brazil

Santa Helena experiences the highest level of ultraviolet (UV) radiation in January, March and April, when the maximum UV index can reach values of 15 - 16, which corresponds to the Extreme category of sun exposure. June, July and October are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 13. For more detailed information, check out our hourly Santa Helena UV Index data.

Average daily maximum UV levels by month for Santa Helena. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)151416161312111313131313