Araruama climate
Araruama (Rio de Janeiro, Brazil) has a tropical savanna (dry winter) climate (Köppen Aw). The average temperature over the year is 24 °C75 °F, and about 1,362 mm54 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Araruama climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2983 | 2374 | 2679 | 1947.6 |
| Feb | 2984 | 2374 | 2679 | 1325.2 |
| Mar | 2883 | 2374 | 2679 | 1606.3 |
| Apr | 2781 | 2272 | 2577 | 923.6 |
| May | 2578 | 2069 | 2373 | 742.9 |
| Jun | 2577 | 1967 | 2272 | 431.7 |
| Jul | 2576 | 1965 | 2271 | 421.7 |
| Aug | 2577 | 1965 | 2271 | 391.5 |
| Sep | 2678 | 1966 | 2272 | 632.5 |
| Oct | 2780 | 2069 | 2374 | 1014.0 |
| Nov | 2780 | 2170 | 2475 | 2017.9 |
| Dec | 2882 | 2373 | 2577 | 2218.7 |
| Year | 2984 | 1965 | 2475 | 1,36254 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 82% | 69% | 5.8 | 13:23 |
| Feb | 82% | 60% | 6.0 | 12:53 |
| Mar | 82% | 64% | 5.1 | 12:17 |
| Apr | 80% | 55% | 4.5 | 11:35 |
| May | 79% | 55% | 3.7 | 11:02 |
| Jun | 79% | 47% | 3.4 | 10:44 |
| Jul | 77% | 45% | 3.6 | 10:51 |
| Aug | 76% | 44% | 4.2 | 11:20 |
| Sep | 76% | 57% | 4.6 | 11:00 |
| Oct | 78% | 69% | 5.0 | 12:40 |
| Nov | 81% | 78% | 5.0 | 13:15 |
| Dec | 82% | 73% | 5.5 | 13:32 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Araruama is like
The warmest month is February, with an average high of 29 °C84 °F and a low of 23 °C74 °F. The coldest is July, when highs average 25 °C76 °F and lows 19 °C65 °F. Seasonal differences are small — just 4.6 °C8.4 °F between the warmest and the coolest month.
It is wet, with about 1,362 mm54 in of precipitation per year. The wettest three-month stretch is November–January, which brings 45% of the annual total. The wettest month is December (221 mm8.7 in), the driest is August (39 mm1.5 in).
Relative humidity ranges from 76% in September to 82% in December. The clearest skies (lowest average cloud amount, 44%) are typical of August. Average wind speed near the ground ranges from 10 km/h (6 mph) in March to 13 km/h (8 mph) in September. Daylight lasts from about 10.7 hours in June to 13.5 hours in December.
Best time to visit Araruama
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May–September: average highs of 25 °C76 °F to 26 °C78 °F with 39 mm1.5 in to 74 mm2.9 in of precipitation per month.
The most challenging month is December, which is very wet (221 mm8.7 in) and humid (82% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Araruama
- Wetter months (November–March) — highs 2780 to 29 °C84 °F, lows 2170 to 23 °C74 °F, about 181 mm7.1 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Drier months (April–October) — highs 2576 to 27 °C81 °F, lows 1965 to 22 °C72 °F, about 65 mm2.6 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
How Araruama compares
Compared with Cabo Frio, about 32 km to the east, Araruama has practically the same average temperature and receives a similar amount of precipitation. The difference is largest in October (0.9 °C1.6 °F warmer).
Of the 223 places in Brazil covered by World Climates, Araruama is the 102nd warmest by annual mean temperature and the 91st wettest by annual precipitation. See all of them on the Brazil climate page.
Places in other countries with the most similar temperature and rainfall pattern (seasons shifted for the other hemisphere where needed): West Palm Beach (United States, Am), Avarua (Cook Islands, Af) and Nukualofa (Tonga, Af).
Nearby places
- Cabo Frio 32 km · 24 °C74 °F · 1,319 mm52 in
- Maricá 49 km · 24 °C75 °F · 1,469 mm58 in
- Itaboraí 55 km · 24 °C76 °F · 1,357 mm53 in
- Nova Friburgo 68 km · 19 °C66 °F · 1,336 mm53 in
- Macaé 79 km · 24 °C75 °F · 1,175 mm46 in
- Rio de Janeiro 86 km · 24 °C75 °F · 1,469 mm58 in
- Petrópolis 95 km · 19 °C67 °F · 1,357 mm53 in
- Nova Iguaçu 114 km · 24 °C75 °F · 1,522 mm60 in
Frequently asked questions
What is the warmest month in Araruama?
February is the warmest month in Araruama, with an average high of 29 °C (84 °F) and an average low of 23 °C (74 °F).
What is the coldest month in Araruama?
July is the coldest month, with an average high of 25 °C (76 °F) and an average low of 19 °C (65 °F).
When does it rain the most in Araruama?
December is the wettest month with about 221 mm (8.7 in) of precipitation; August is the driest with about 39 mm (1.5 in).
What is the best time to visit Araruama?
Judging by long-term averages, the most comfortable months are May–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.