Weather in Rio de Janeiro 🇧🇷
Monthly weather averages & travel planning
August
Avg Temp
26°C
Rain Days
8 days
Sun Hours
9 hrs
Humidity
78%
South America › 🇧🇷 Brazil › Rio de Janeiro
Updated: March 2026
Is August a Good Time to Visit Rio de Janeiro?
7/10
Good
August is a good time to visit Rio de Janeiro (7/10). With 9 daily sunshine hours and only 8 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 8th sunniest of the year in Rio de Janeiro. Culture-focused travellers and those who prefer lighter crowds will find August a practical choice, with prices running lower than peak January without sacrificing all the good weather. September offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Rio de Janeiro's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: accommodation is generally available without long lead times, and flight prices are typically lower than peak season. Flexible travellers will find the best deals by booking 2-4 weeks ahead. Mid-week arrivals consistently unlock lower hotel rates than weekend check-ins.
vs July:25°C avg high
Visiting Rio de Janeiro in August means warm daytime temperatures peaking at 26°C. Factor in 8 potential rainy days and 78% average humidity when planning your daily activities.
26°C
79°F
Avg High
18°C
64°F
Avg Low
8 days
43 mm total
Rain Days
9h
per day avg
Sunshine
78%
Humid
Humidity
Temperature in Rio de Janeiro in August
The 8°C day-night temperature range is typical for continental climates: a light jacket in the morning that you shed by midday and need again after sunset. At 78% humidity, the 26°C daytime high feels 2-4°C warmer in practice: quick-dry fabrics and shade-seeking between noon and 3pm are the sensible response. The UV index of 2 is low, meaning sun exposure is minimal concern and sunscreen is largely optional. Winds are calm at an average 12 km/h, so wind-chill is not a factor in planning your clothing. In Fahrenheit: 79°F average high, 64°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature Trends
High
Low
Rainfall (mm)
0-20 mm21-50 mm51-100 mm100+ mm
What to Wear in Rio de Janeiro in August
Morning18°CBefore the day warms up
Afternoon26°CPeak daytime temperature
Evening21°CAfter sunset cools down
Packing for Rio de Janeiro in August means dressing for 26°C days and 18°C evenings. A light cotton tee with a casual overshirt works well at 26°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 18°C, a modest 8°C drop that a light cardigan or denim jacket covers. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. At 78% average humidity, quick-dry synthetic or bamboo fabrics dry overnight and stay comfortable longer than cotton.
Local tip: Layers are more practical than a single heavy garment in Rio de Janeiro. The day-to-evening temperature shift rewards packing a versatile mid-layer you can add or remove as conditions change.
Events in Rio de Janeiro in August
August has no major festivals or public holidays in Rio de Janeiro, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
What to Pack for Rio de Janeiro in August
Based on 26°C average highs and 8 rainy days
- Light layers for morning and evening
- Breathable T-shirts and comfortable trousers
- UV-protective sunglasses
- Quick-dry travel towel
- Anti-chafe balm for long walking days
- Moisture-wicking synthetic fabrics for active days
- SPF 30+ sunscreen
- Comfortable walking shoes (a second pair lets the first air out overnight)
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Rio de Janeiro in August
- Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 26°C, the temperature is ideal for extended walking without overheating
- Guided walking tour of the historic centreMorning or late afternoonComfortable temperatures allow several hours on foot without fatigue
- Visit rooftop viewpoints and observation decksGolden hour (1 hour before sunset)Warm clear evenings provide exceptional visibility for panoramic photography
- Day trip to the surrounding countryside or coastFull day (depart by 8am)August is reliably dry enough for rural day trips without weather risk
- Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
- Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
- Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningAugust brings distinct seasonal changes to public green spaces worth exploring
- Seek out chilled local specialities: cold-brew tea, ice desserts, or chilled seafood at street-level stallsAny time; most atmospheric in evening marketsHot-weather street food culture peaks in August, with vendors setting up specifically for warm evenings
Why is Rio de Janeiro warm in August?
In August, Rio de Janeiro sits in the dry season corridor, as the ITCZ shifts away from the region and trade winds bring drier, more stable air. This produces reliably sunny days reaching 26°C, with lower humidity than the wet months. Overnight lows of 18°C offer a pleasant reprieve from the midday heat. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate, wear sunscreen. UV 6-7: High, hat and SPF 30+ essential. UV 8-10: Very High, limit midday exposure. UV 11+: Extreme, seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry, skin and throat may feel parched. 40-60%: Comfortable, ideal for most people. 60-80%: Sticky, light breathable fabrics recommended. Above 80%: Muggy, heat feels more intense; quick-dry clothing is essential.
Frequently Asked Questions
Rio de Janeiro in August
In August, Rio de Janeiro experiences average highs of 26°C (79°F) and lows of 18°C (64°F). Expect around 8 rainy days and 9 hours of sunshine per day, with humidity averaging 78%. The 8°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV exposure is moderate at index 2.
Rio de Janeiro typically sees 8 rainy days in August, with total precipitation of around 43mm. Rain is moderate and manageable. Showers tend to pass quickly, and a light rain layer or foldable umbrella is sufficient protection for most days. For context, the driest month in Rio de Janeiro typically sees 4-6 fewer rain days than August.
Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Rio de Janeiro in August. Daytime temperatures of 26°C are pleasant, but the evening drop to 18°C means a jacket is essential if you plan to be out after dark. Rain is infrequent with only 8 wet days, so a light rain layer is optional. Comfortable walking shoes are a priority given the amount of ground most visitors cover.
Yes, August is an excellent time to visit Rio de Janeiro. With 9 daily sunshine hours and only 8 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 26°C during the day are comfortable for long walks and outdoor dining. This is peak travel season, so booking accommodation in advance and arriving at popular attractions early in the morning helps avoid the busiest periods.
The average high temperature in Rio de Janeiro in August is 26°C (79°F), and the average low is 18°C (64°F). The mean daily temperature is approximately 22°C (72°F). The day-to-night range of 8°C is moderate, meaning a single light jacket covers most situations. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.
The best month to visit Rio de Janeiro is generally May. May offers the most sunshine at 9 hours per day and only 11 rainy days. Average temperatures reach 26°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around May gives you the best chance of dry, bright weather.
August is shoulder or low season in Rio de Janeiro, meaning fewer tourists and generally lower prices than peak months. With 9 sunshine hours and 8 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.
In August, Rio de Janeiro suits a range of activities thanks to mild temperatures around 26°C. Mix of indoor and outdoor activities works well given the moderate chance of rain. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 9 hours of sunshine, parks and waterfront walks are particularly enjoyable.
August ranks 8th sunniest of the year in Rio de Janeiro, with an average 9 daily sunshine hours. The driest months are June, July, and August. January is the hottest month (31°C avg high); June is the coolest (25°C). From here, temperatures rise 1°C into September. Compared to last month (July: 25°C high, 7 rain days), August is warmer and wetter. August sits in the middle of the annual sunshine ranking for Rio de Janeiro, offering a reasonable balance of good weather and manageable crowds.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 31°C | 24°C | 20 | 10h | View |
| February | 31°C | 24°C | 17 | 10h | View |
| March | 30°C | 23°C | 21 | 10h | View |
| April | 28°C | 22°C | 14 | 10h | View |
| May | 26°C | 19°C | 11 | 9h | View |
| June | 25°C | 18°C | 7 | 9h | View |
| July | 25°C | 17°C | 7 | 8h | View |
| August | 26°C | 18°C | 8 | 9h | View |
| September | 27°C | 19°C | 11 | 9h | View |
| October | 28°C | 20°C | 14 | 9h | View |
| November | 28°C | 21°C | 19 | 9h | View |
| December | 30°C | 23°C | 20 | 10h | View |
January
20 rain days, 10h sun
31°24°
February
17 rain days, 10h sun
31°24°
March
21 rain days, 10h sun
30°23°
April
14 rain days, 10h sun
28°22°
May
11 rain days, 9h sun
26°19°
June
7 rain days, 9h sun
25°18°
July
7 rain days, 8h sun
25°17°
August
8 rain days, 9h sun
26°18°
September
11 rain days, 9h sun
27°19°
October
14 rain days, 9h sun
28°20°
November
19 rain days, 9h sun
28°21°
December
20 rain days, 10h sun
30°23°
Other Months in Rio de Janeiro
Plan Your Trip to Rio de Janeiro
Data Sources for Rio de Janeiro
Climate normals represent 30-year averages (1991-2020). Individual years may vary.