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Monthly climate in Niteroi, Rio de Janeiro, Brazil

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Niteroi features a tropical savanna climate (Aw). Temperatures typically range between 21 °C (71 °F) and 27 °C (81 °F) through the year, but rarely can drop to 14 °C (58 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 1014 mm (39.9 inches) and receives 145 rainy days on the 1 mm (0.04 inches) threshold annually. Niteroi enjoys an average of 3445 hours of sunshine throughout the year, and daylight varies from 10 hours 44 minutes to 13 hours 30 minutes per day.

Monthly average temperatures in Niteroi, Rio de Janeiro, Brazil §

The warmest months in Niteroi are January, February and March, with daily mean temperatures ranging from 27 to 27 °C (80 - 81 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 21 to 22 °C (71 - 73 °F) throughout the day. On average each year, Niteroi experiences 241 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 Niteroi, Rio de Janeiro, 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
(94°F)		 35°C
(95°F)		 34°C
(94°F)		 34°C
(93°F)		 33°C
(91°F)		 31°C
(89°F)		 32°C
(90°F)		 32°C
(90°F)		 34°C
(94°F)		 36°C
(97°F)		 34°C
(94°F)		 33°C
(92°F)
Mean maximum 34°C
(94°F)		 33°C
(92°F)		 33°C
(92°F)		 32°C
(90°F)		 31°C
(88°F)		 29°C
(85°F)		 30°C
(86°F)		 31°C
(88°F)		 33°C
(91°F)		 33°C
(92°F)		 32°C
(91°F)		 33°C
(91°F)
Average high 30°C
(87°F)		 29°C
(85°F)		 30°C
(85°F)		 27°C
(82°F)		 26°C
(79°F)		 26°C
(78°F)		 25°C
(77°F)		 24°C
(76°F)		 26°C
(80°F)		 26°C
(80°F)		 26°C
(80°F)		 28°C
(83°F)
Daily mean 27°C
(81°F)		 27°C
(80°F)		 27°C
(80°F)		 25°C
(77°F)		 23°C
(74°F)		 22°C
(73°F)		 21°C
(71°F)		 21°C
(71°F)		 23°C
(74°F)		 24°C
(75°F)		 24°C
(75°F)		 25°C
(78°F)
Average low 25°C
(77°F)		 24°C
(76°F)		 24°C
(76°F)		 22°C
(73°F)		 21°C
(69°F)		 20°C
(69°F)		 19°C
(66°F)		 19°C
(66°F)		 20°C
(69°F)		 22°C
(71°F)		 22°C
(71°F)		 23°C
(74°F)
Mean minimum 23°C
(73°F)		 22°C
(72°F)		 22°C
(72°F)		 20°C
(69°F)		 18°C
(64°F)		 19°C
(66°F)		 16°C
(62°F)		 16°C
(61°F)		 18°C
(64°F)		 18°C
(66°F)		 19°C
(66°F)		 20°C
(69°F)
Minimum 21°C
(70°F)		 21°C
(71°F)		 20°C
(69°F)		 19°C
(67°F)		 16°C
(61°F)		 16°C
(62°F)		 15°C
(59°F)		 14°C
(58°F)		 17°C
(63°F)		 17°C
(63°F)		 18°C
(64°F)		 19°C
(67°F)

Compare climate in Niteroi with other places

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

Monthly average precipitation in Niteroi, Rio de Janeiro, Brazil §

Niteroi usually has the most precipitation in February, March and December, with an average of 15 rainy days and 126 mm (5.0 inches) of precipitation per month. The driest months in Niteroi are June, July and September. On average, 41 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Niteroi, Rio de Janeiro, 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) 91 (3.6) 119 (4.7) 138 (5.4) 81 (3.2) 73 (2.9) 39 (1.5) 35 (1.4) 68 (2.7) 48 (1.9) 86 (3.4) 115 (4.5) 121 (4.8)
Average precipitation days (≥ 1 mm) 11 15 16 14 10 9 6 11 8 14 16 15

Monthly sunshine hours in Niteroi, Rio de Janeiro, Brazil §

The sunniest months in Niteroi are March, April and December, when the sun shines an average of 10 hours 2 minutes a day. Least sunny months in Niteroi: January, February and August receive an average of 8 hours 58 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Niteroi, Rio de Janeiro, 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 270 271 309 295 282 275 289 274 293 280 284 318
Mean daily daylight hours 13h 20m 12h 50m 12h 11m 11h 31m 10h 59m 10h 44m 10h 52m 11h 20m 11h 57m 12h 37m 13h 12m 13h 30m

Solar UV radiation in Niteroi, Rio de Janeiro, Brazil §

Niteroi experiences the highest level of ultraviolet (UV) radiation in January, February and December, when the maximum UV index can reach values of 14 - 15, which corresponds to the Extreme category of sun exposure. May, June and July are in the High exposure category. In these months, the maximum values of the UV index do not exceed 7. For more detailed information, check out our hourly Niteroi UV Index data.

Average daily maximum UV levels by month for Niteroi, Rio de Janeiro, 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 14 13 10 7 6 7 9 11 12 13 15

Detailed Monthly Weather Insights for Niteroi, Rio de Janeiro, Brazil

Discover in-depth weather details for every month in Niteroi. 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 Niteroi'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.