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Monthly climate in Rio Branco, Brazil

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Rio Branco features a tropical monsoon climate (Am). Temperatures typically range between 24 °C (76 °F) and 27 °C (82 °F) through the year, but rarely can drop to 12 °C (53 °F) or can rise to as high as 38 °C (100 °F). The average annual precipitation amounts to about 1849 mm (72.8 inches) and receives 203 rainy days on the 1 mm (0.04 inches) threshold annually. Rio Branco enjoys an average of 3169 hours of sunshine throughout the year, and daylight varies from 11 hours 32 minutes to 12 hours 41 minutes per day.

Monthly average temperatures in Rio Branco, Brazil §

The warmest months in Rio Branco are September, October and November, with daily mean temperatures ranging from 26 to 27 °C (80 - 82 °F) throughout the day. The coldest temperatures usually occur in May, June and July, when daily mean temperatures range from 24 to 25 °C (76 - 77 °F) throughout the day. On average each year, Rio Branco experiences 319 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 Rio Branco, Brazil. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 34°C
(93°F)		 33°C
(91°F)		 34°C
(93°F)		 34°C
(93°F)		 34°C
(93°F)		 34°C
(93°F)		 35°C
(96°F)		 37°C
(99°F)		 38°C
(100°F)		 37°C
(99°F)		 37°C
(98°F)		 34°C
(94°F)
Mean maximum 33°C
(91°F)		 33°C
(91°F)		 33°C
(91°F)		 33°C
(92°F)		 33°C
(92°F)		 33°C
(91°F)		 35°C
(94°F)		 36°C
(97°F)		 37°C
(99°F)		 36°C
(97°F)		 35°C
(95°F)		 33°C
(92°F)
Average high 30°C
(86°F)		 30°C
(86°F)		 30°C
(86°F)		 30°C
(87°F)		 30°C
(86°F)		 30°C
(86°F)		 32°C
(89°F)		 33°C
(92°F)		 34°C
(94°F)		 33°C
(91°F)		 31°C
(88°F)		 30°C
(86°F)
Daily mean 26°C
(79°F)		 25°C
(78°F)		 26°C
(78°F)		 26°C
(78°F)		 25°C
(77°F)		 24°C
(76°F)		 25°C
(76°F)		 26°C
(79°F)		 27°C
(82°F)		 27°C
(81°F)		 26°C
(80°F)		 26°C
(79°F)
Average low 23°C
(73°F)		 23°C
(73°F)		 23°C
(73°F)		 22°C
(73°F)		 21°C
(70°F)		 20°C
(68°F)		 19°C
(66°F)		 20°C
(68°F)		 22°C
(73°F)		 23°C
(73°F)		 23°C
(74°F)		 23°C
(74°F)
Mean minimum 22°C
(71°F)		 22°C
(71°F)		 21°C
(71°F)		 19°C
(66°F)		 17°C
(63°F)		 17°C
(62°F)		 14°C
(57°F)		 14°C
(58°F)		 19°C
(67°F)		 20°C
(68°F)		 22°C
(71°F)		 22°C
(72°F)
Minimum 20°C
(68°F)		 21°C
(69°F)		 20°C
(68°F)		 16°C
(62°F)		 15°C
(59°F)		 12°C
(55°F)		 12°C
(54°F)		 12°C
(53°F)		 15°C
(60°F)		 19°C
(66°F)		 20°C
(69°F)		 21°C
(71°F)

Compare climate in Rio Branco with other places

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

Monthly average precipitation in Rio Branco, Brazil §

Rio Branco usually has the most precipitation in February, March and December, with an average of 26 rainy days and 293 mm (11.5 inches) of precipitation per month. The driest months in Rio Branco are June, July and August. On average, 24 mm (1.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Rio Branco, Brazil. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 264 (10.4) 285 (11.2) 288 (11.3) 168 (6.6) 83 (3.3) 33 (1.3) 14 (0.6) 26 (1.0) 53 (2.1) 125 (4.9) 206 (8.1) 305 (12.0)
Average precipitation days (≥ 1 mm) 23 26 27 24 14 5 2 5 10 17 24 26

Monthly sunshine hours in Rio Branco, Brazil §

The sunniest months in Rio Branco are July, August and October, when the sun shines an average of 9 hours 58 minutes a day. Least sunny months in Rio Branco: January, February and November receive an average of 7 hours 12 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Rio Branco, Brazil. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 203 208 239 246 277 286 330 303 293 293 236 249
Mean daily daylight hours 12h 37m 12h 24m 12h 7m 11h 51m 11h 38m 11h 32m 11h 35m 11h 46m 12h 2m 12h 18m 12h 33m 12h 41m

Solar UV radiation in Rio Branco, Brazil §

Rio Branco experiences the highest level of ultraviolet (UV) radiation in February, March 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 Rio Branco UV Index data.

Average daily maximum UV levels by month for Rio Branco, Brazil. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 15 16 16 14 12 10 10 11 12 14 15 14

Detailed Monthly Weather Insights for Rio Branco, Brazil

Discover in-depth weather details for every month in Rio Branco. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Rio Branco's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.