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Monthly climate in Porto Velho, Brazil

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Porto Velho 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 14 °C (57 °F) or can rise to as high as 37 °C (100 °F). The average annual precipitation amounts to about 2317 mm (91.2 inches) and receives 229 rainy days on the 1 mm (0.04 inches) threshold annually. Porto Velho enjoys an average of 3136 hours of sunshine throughout the year, and daylight varies from 11 hours 36 minutes to 12 hours 36 minutes per day.

Monthly average temperatures in Porto Velho, Brazil

The warmest months in Porto Velho are August, September and October, with daily mean temperatures ranging from 27 to 28 °C (81 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 26 to 26 °C (79 - 79 °F) throughout the day. On average each year, Porto Velho 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 Porto Velho. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum33°C
(92°F)		33°C
(91°F)		33°C
(92°F)		33°C
(92°F)		33°C
(92°F)		34°C
(93°F)		35°C
(96°F)		37°C
(99°F)		37°C
(100°F)		36°C
(97°F)		35°C
(95°F)		34°C
(94°F)
Mean maximum33°C
(91°F)		32°C
(90°F)		33°C
(91°F)		32°C
(91°F)		33°C
(91°F)		33°C
(92°F)		35°C
(95°F)		36°C
(97°F)		36°C
(98°F)		35°C
(95°F)		34°C
(93°F)		33°C
(92°F)
Average high30°C
(86°F)		29°C
(85°F)		30°C
(86°F)		30°C
(87°F)		30°C
(87°F)		31°C
(88°F)		32°C
(91°F)		33°C
(93°F)		34°C
(93°F)		32°C
(90°F)		31°C
(88°F)		30°C
(86°F)
Daily mean26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(80°F)		27°C
(81°F)		28°C
(83°F)		27°C
(81°F)		27°C
(80°F)		26°C
(79°F)
Average low24°C
(75°F)		24°C
(75°F)		24°C
(75°F)		24°C
(75°F)		23°C
(74°F)		23°C
(73°F)		22°C
(72°F)		23°C
(73°F)		24°C
(75°F)		24°C
(75°F)		24°C
(75°F)		24°C
(75°F)
Mean minimum23°C
(73°F)		23°C
(73°F)		23°C
(73°F)		22°C
(72°F)		20°C
(69°F)		20°C
(69°F)		18°C
(64°F)		18°C
(65°F)		22°C
(72°F)		22°C
(73°F)		23°C
(73°F)		23°C
(73°F)
Minimum22°C
(72°F)		22°C
(72°F)		22°C
(73°F)		19°C
(67°F)		18°C
(65°F)		17°C
(63°F)		14°C
(58°F)		14°C
(57°F)		20°C
(68°F)		22°C
(72°F)		22°C
(73°F)		22°C
(73°F)

Compare climate in Porto Velho with other places

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

Monthly average precipitation in Porto Velho, Brazil

Porto Velho usually has the most precipitation in February, March and December, with an average of 28 rainy days and 352 mm (13.9 inches) of precipitation per month. The driest months in Porto Velho are June, July and August. On average, 21 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Porto Velho. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)268 (10.5)369 (14.5)315 (12.4)268 (10.5)119 (4.7)27 (1.1)3 (0.1)31 (1.2)82 (3.2)185 (7.3)277 (10.9)372 (14.7)
Average precipitation days (≥ 1 mm)242729281860513232729

Monthly sunshine hours in Porto Velho, Brazil

The sunniest months in Porto Velho are June, July and August, when the sun shines an average of 10 hours 22 minutes a day. Least sunny months in Porto Velho: January, February and March receive an average of 6 hours 57 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Porto Velho. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours199207225238283309335308293277226229
Mean daily daylight hours12h 33m12h 21m12h 7m11h 53m11h 41m11h 36m11h 39m11h 49m12h 2m12h 17m12h 30m12h 36m

Solar UV radiation in Porto Velho, Brazil

Porto Velho experiences the highest level of ultraviolet (UV) radiation in March, April and November, when the maximum UV index can reach values of 15 - 16, which corresponds to the Extreme category of sun exposure. June, July and August are in the Very High / Extreme exposure category. In these months, the maximum values of the UV index do not exceed 11. For more detailed information, check out our hourly Porto Velho UV Index data.

Average daily maximum UV levels by month for Porto Velho. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)151516151210101112141514