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Monthly climate in Tres Rios, Brazil

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Tres Rios features a humid subtropical climate (Cfa). Temperatures typically range between 18 °C (64 °F) and 25 °C (77 °F) through the year, but rarely can drop to 5 °C (41 °F) or can rise to as high as 35 °C (96 °F). The average annual precipitation amounts to about 1181 mm (46.5 inches) and receives 137 rainy days on the 1 mm (0.04 inches) threshold annually. Tres Rios enjoys an average of 3325 hours of sunshine throughout the year, and daylight varies from 10 hours 47 minutes to 13 hours 26 minutes per day.

Monthly average temperatures in Tres Rios, Brazil

The warmest months in Tres Rios are January, February and March, with daily mean temperatures ranging from 24 to 25 °C (75 - 77 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 18 to 19 °C (64 - 67 °F) throughout the day. On average each year, Tres Rios experiences 230 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 Tres Rios. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum34°C
(94°F)		34°C
(94°F)		34°C
(93°F)		33°C
(92°F)		31°C
(88°F)		30°C
(86°F)		30°C
(86°F)		32°C
(90°F)		35°C
(96°F)		35°C
(96°F)		35°C
(95°F)		35°C
(95°F)
Mean maximum33°C
(92°F)		33°C
(91°F)		33°C
(91°F)		31°C
(89°F)		30°C
(86°F)		29°C
(84°F)		29°C
(84°F)		30°C
(87°F)		33°C
(92°F)		33°C
(92°F)		33°C
(91°F)		33°C
(91°F)
Average high30°C
(86°F)		29°C
(84°F)		29°C
(85°F)		27°C
(81°F)		25°C
(78°F)		25°C
(77°F)		24°C
(76°F)		24°C
(75°F)		27°C
(82°F)		27°C
(81°F)		27°C
(80°F)		28°C
(83°F)
Daily mean25°C
(77°F)		24°C
(75°F)		24°C
(75°F)		22°C
(72°F)		20°C
(68°F)		19°C
(67°F)		18°C
(64°F)		18°C
(66°F)		22°C
(71°F)		22°C
(72°F)		22°C
(72°F)		23°C
(74°F)
Average low21°C
(69°F)		20°C
(69°F)		20°C
(68°F)		18°C
(64°F)		15°C
(60°F)		15°C
(59°F)		13°C
(55°F)		14°C
(57°F)		17°C
(63°F)		18°C
(65°F)		18°C
(65°F)		20°C
(68°F)
Mean minimum18°C
(65°F)		18°C
(64°F)		16°C
(62°F)		14°C
(57°F)		10°C
(50°F)		11°C
(53°F)		9°C
(48°F)		9°C
(49°F)		12°C
(54°F)		14°C
(58°F)		14°C
(58°F)		16°C
(62°F)
Minimum17°C
(63°F)		17°C
(63°F)		14°C
(57°F)		12°C
(53°F)		7°C
(45°F)		10°C
(50°F)		5°C
(42°F)		5°C
(41°F)		10°C
(50°F)		12°C
(53°F)		12°C
(53°F)		13°C
(55°F)

Compare climate in Tres Rios with other places

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

Monthly average precipitation in Tres Rios, Brazil

Tres Rios usually has the most precipitation in February, November and December, with an average of 19 rainy days and 205 mm (8.1 inches) of precipitation per month. The driest months in Tres Rios are May, June and July. On average, 22 mm (0.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Tres Rios. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)120 (4.7)211 (8.3)143 (5.6)48 (1.9)36 (1.4)19 (0.7)11 (0.4)37 (1.4)45 (1.8)107 (4.2)203 (8.0)202 (7.9)
Average precipitation days (≥ 1 mm)141916963266161921

Monthly sunshine hours in Tres Rios, Brazil

The sunniest months in Tres Rios are March, July and September, when the sun shines an average of 9 hours 42 minutes a day. Least sunny months in Tres Rios: February, October and November receive an average of 8 hours 39 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Tres Rios. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours263260306284277272290268295258258287
Mean daily daylight hours13h 17m12h 48m12h 10m11h 32m11h 2m10h 47m10h 55m11h 22m11h 58m12h 36m13h 9m13h 26m

Solar UV radiation in Tres Rios, Brazil

Tres Rios experiences the highest level of ultraviolet (UV) radiation in January, February and December, when the maximum UV index can reach values of 15 - 16, which corresponds to the Extreme category of sun exposure. May, June and July are in the High / Very High exposure category. In these months, the maximum values of the UV index do not exceed 8. For more detailed information, check out our hourly Tres Rios UV Index data.

Average daily maximum UV levels by month for Tres Rios. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)161513118681012131415