Rio de Janeiro Weather in May

🇧🇷 Brazil

26°C

High

19°C

Low

Rain Days

Sunshine

78%

Humidity

South America › 🇧🇷 Brazil › Rio de Janeiro

Updated: March 2026

Is May a Good Time to Visit Rio de Janeiro?

6/10

Good

May is a good time to visit Rio de Janeiro (6/10). With 9 daily sunshine hours and only 11 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 6th sunniest of the year in Rio de Janeiro. Culture-focused travellers and those who prefer lighter crowds will find May a practical choice, with prices running lower than peak January without sacrificing all the good weather. June 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 April:28°C avg high

Visiting Rio de Janeiro in May means warm daytime temperatures peaking at 26°C. Factor in 11 potential rainy days and 78% average humidity when planning your daily activities.

26°C

Avg High

19°C

Avg Low

11 days

Rain Days

Sunshine

78%

Humidity

Temperature in Rio de Janeiro in May

The 7°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 10 km/h, so wind-chill is not a factor in planning your clothing. In Fahrenheit: 79°F average high, 66°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).

Temperature in May

Monthly Precipitation (mm)

What to Wear in Rio de Janeiro in May

Morning19°CBefore the day warms up

Afternoon26°CPeak daytime temperature

Evening22°CAfter sunset cools down

Packing for Rio de Janeiro in May means dressing for 26°C days and 19°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 19°C, a modest 7°C drop that a light cardigan or denim jacket covers. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. A compact foldable umbrella weighs almost nothing and earns its keep across 11 potential rainy days. At 78% average humidity, quick-dry synthetic or bamboo fabrics dry overnight and stay comfortable longer than cotton.

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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 May

May 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 May

Based on 26°C average highs and 11 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
Compact folding umbrella
Waterproof outer layer or packable rain jacket
Quick-dry clothing that recovers fast after a shower
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 May

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)May 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 morningMay 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 May, with vendors setting up specifically for warm evenings

Why is Rio de Janeiro warm in May?

In May, 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 19°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 May

In May, Rio de Janeiro experiences average highs of 26°C (79°F) and lows of 19°C (66°F). Expect around 11 rainy days and 9 hours of sunshine per day, with humidity averaging 78%. The 7°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 11 rainy days in May, with total precipitation of around 76mm. 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 May.

Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Rio de Janeiro in May. Daytime temperatures of 26°C are pleasant, but the evening drop to 19°C means a jacket is essential if you plan to be out after dark. With 11 rainy days, bring a compact umbrella or waterproof jacket for unexpected showers. Comfortable walking shoes are a priority given the amount of ground most visitors cover.

Yes, May is an excellent time to visit Rio de Janeiro. With 9 daily sunshine hours and only 11 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 May is 26°C (79°F), and the average low is 19°C (66°F). The mean daily temperature is approximately 23°C (73°F). The day-to-night range of 7°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.

May is shoulder or low season in Rio de Janeiro, meaning fewer tourists and generally lower prices than peak months. With 9 sunshine hours and 11 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 May, 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.

May ranks 6th 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 fall 1°C into June. Compared to last month (April: 28°C high, 14 rain days), May is cooler and drier. May 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

Other Months in Rio de Janeiro

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Plan Your Trip to Rio de Janeiro

Best Time to Visit Rio de Janeiro Rio de Janeiro vs Sao Paulo in May

Data Sources for Rio de Janeiro

Rio de Janeiro on Wikipedia Open-Meteo Climate API NOAA National Centers UK Met Office WMO GeoNames

Climate normals represent 30-year averages (1991-2020). Individual years may vary.