Weather in Rio de Janeiro 🇧🇷
Monthly weather averages & travel planning
January
Avg Temp
31°C
Rain Days
20 days
Sun Hours
10 hrs
Humidity
78%
South America › 🇧🇷 Brazil › Rio de Janeiro
Updated: March 2026
Is January a Good Time to Visit Rio de Janeiro?
4/10
Fair
January is a fair time to visit Rio de Janeiro (4/10). With 10 daily sunshine hours and only 20 rain days, this month delivers genuinely reliable outdoor conditions, ranking it the sunniest month of the year in Rio de Janeiro. January suits travellers visiting for indoor culture, food, and architecture rather than outdoor activities. Pack accordingly for 20 potential rain days. February offers a similar profile at lower hotel rates if dates are flexible. Watch out for prolonged rain stretches: with 20 wet days, a fully outdoor itinerary is risky. Build in museum days and covered market visits as contingency. Planning tips: most accommodation categories have availability, and last-minute deals are common. The quieter streets and shorter queues can make this a genuinely enjoyable time to visit for the right type of traveller. Budget-conscious visitors will find the best value of the year in this period.
vs December:30°C avg high
Visiting Rio de Janeiro in January means bold, midsummer heat topping 30°C. Factor in 20 potential rainy days and 78% average humidity when planning your daily activities.
31°C
88°F
Avg High
24°C
75°F
Avg Low
20 days
253 mm total
Rain Days
10h
per day avg
Sunshine
78%
Humid
Humidity
Temperature in Rio de Janeiro in January
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 31°C daytime high feels 2-4°C warmer in practice: quick-dry fabrics and shade-seeking between noon and 3pm are the sensible response. UV index averages 9 this month, classed as high to very high. SPF 30+ sunscreen, a brim hat, and sunglasses are not optional between 10am and 4pm. Winds are calm at an average 11 km/h, so wind-chill is not a factor in planning your clothing. In Fahrenheit: 88°F average high, 75°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 January
Morning24°CBefore the day warms up
Afternoon31°CPeak daytime temperature
Evening27°CAfter sunset cools down
Packing for Rio de Janeiro in January means dressing for 31°C days and 24°C evenings. A lightweight linen or cotton shirt with loose-fit trousers or a sundress handles the 31°C daytime heat. Evening temperatures settle at 24°C, a modest 7°C drop that a light cardigan or denim jacket covers. For footwear, breathable walking sandals work for casual exploration, but closed-toe trainers are better for uneven surfaces in the historic centre. With 20 rain days expected, a compact travel umbrella is worth the bag space. A waterproof jacket is better than an umbrella if you plan full-day outdoor routes. At 78% average humidity, quick-dry synthetic or bamboo fabrics dry overnight and stay comfortable longer than cotton.
Local tip: Rio de Janeiro sees heavy rain periods where a compact travel umbrella can feel inadequate. A packable waterproof jacket offers better coverage for prolonged downpours and leaves both hands free for maps and cameras.
Events in Rio de Janeiro in January
January 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 January
Based on 31°C average highs and 20 rainy days
- Lightweight breathable clothing
- Linen or bamboo shirts for the hottest hours
- Sun hat with a wide brim
- UV-protective sunglasses
- Hydration bottle (at least 1 litre)
- 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 January
- Early morning walk through Rio de Janeiro's historic market districtBest before 9amTemperatures are still manageable at 27°C before the midday heat builds
- Open-air rooftop dining at sunsetFrom 6pm onwardsThe 31°C daytime heat drops noticeably after sunset, making al fresco dining comfortable
- Waterfront promenade or harbour walkEarly morning or after 5pmSea breezes cut through the humidity, making coastal routes the most pleasant in heat
- Guided cycling tour of the old quarterFirst tour of the day (7-9am)The low-traffic window before tourist crowds and the cooler morning air make this the prime riding slot
- Spend a morning in the national or city art museumOpens at 10am; arrive earlyWith 20 rain days expected, having a full-day indoor plan is practical insurance
- Cooking class focused on regional cuisineHalf-day sessions run 10am-1pm or 3-6pmIndoor activity that fills a rainy half-day with genuine cultural content
- Visit covered historical sites: cathedral, palace, or bazaarAny time; most crowded middayRoofed monuments and covered markets provide exploration without weather exposure
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningJanuary 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 January, with vendors setting up specifically for warm evenings
Why is Rio de Janeiro warm in January?
Rio de Janeiro's January climate is governed by the Inter-Tropical Convergence Zone (ITCZ), which draws moisture-laden trade winds across the region, producing the characteristic wet season rainfall of steamy tropical cities. Daytime heat peaks around 31°C, moderated slightly by afternoon convective showers. Overnight temperatures remain warm at 24°C because the humid air retains heat effectively. 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 January
In January, Rio de Janeiro experiences average highs of 31°C (88°F) and lows of 24°C (75°F). Expect around 20 rainy days and 10 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 index averages 9, so sun protection is advisable on clear days.
Rio de Janeiro typically sees 20 rainy days in January, with total precipitation of around 253mm. This is a notably wet period. A waterproof jacket or compact umbrella is essential, and it is worth building indoor alternatives into your daily itinerary for the inevitable rainy stretches. For context, the driest month in Rio de Janeiro typically sees 4-6 fewer rain days than January.
Pack lightweight, breathable clothing (linen or cotton), a wide-brim sun hat, SPF 50+ sunscreen, and a refillable water bottle for Rio de Janeiro in January. The 31°C daytime heat demands sun protection during midday hours, typically 11am to 4pm. A compact travel umbrella is also worth packing, as 20 rainy days means afternoon showers are a real possibility. Quick-dry synthetic fabrics are preferable to cotton in 78% humidity.
January is a reasonable time to visit Rio de Janeiro. Expect 20 rainy days, so pack a light rain layer for flexibility. Average temperatures of 31°C make outdoor exploration comfortable during the dry periods. With 10 daily sunshine hours, there are reliable windows of good weather to plan outdoor activities around, even if the month is not the driest on the calendar.
The average high temperature in Rio de Janeiro in January is 31°C (88°F), and the average low is 24°C (75°F). The mean daily temperature is approximately 28°C (82°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.
January is shoulder or low season in Rio de Janeiro, meaning fewer tourists and generally lower prices than peak months. With 10 sunshine hours and 20 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 January, Rio de Janeiro suits a range of activities thanks to warm temperatures of 31°C. With frequent rain, indoor activities and covered attractions are a smart choice. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 10 hours of sunshine, parks and waterfront walks are particularly enjoyable.
January ranks 1st sunniest of the year in Rio de Janeiro, with an average 10 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 0°C into February. Compared to last month (December: 30°C high, 20 rain days), January is warmer and equally dry. January is among the top three sunniest months to visit Rio de Janeiro.
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.