Temperatures stay fairly stable month to month across the year.
| Month | Low Temperature | High Temperature | Category |
|---|---|---|---|
| January | 23.6°C | 30.4°C | HOT |
| February | 23.7°C | 30.9°C | HOT |
| March | 23.1°C | 29.5°C | WARM |
| April | 21.5°C | 27.7°C | WARM |
| May | 19.2°C | 25.5°C | WARM |
| June | 18°C | 25°C | WARM |
| July | 17.4°C | 24.8°C | WARM |
| August | 17.7°C | 25.8°C | WARM |
| September | 18.8°C | 26.7°C | WARM |
| October | 20.2°C | 27.5°C | WARM |
| November | 21°C | 27.7°C | WARM |
| December | 22.6°C | 29.3°C | WARM |
February has the warmest typical feels-like highs (36.7°C / 98°F), while July is coolest (26.2°C / 79.1°F).
| Month | Low Feels Like | High Feels Like | Category |
|---|---|---|---|
| January | 28°C | 36.1°C | HOT |
| February | 28.3°C | 36.7°C | HOT |
| March | 27.4°C | 34.7°C | HOT |
| April | 24.8°C | 31.5°C | HOT |
| May | 21.3°C | 27.9°C | WARM |
| June | 19.5°C | 26.8°C | WARM |
| July | 18.5°C | 26.2°C | WARM |
| August | 18.9°C | 27.3°C | WARM |
| September | 20.5°C | 28.9°C | WARM |
| October | 22.6°C | 30.8°C | HOT |
| November | 24°C | 31.6°C | HOT |
| December | 26.5°C | 34.4°C | HOT |
January is wettest at 239.8 mm / 9.44 inches, while June is driest at 45.5 mm / 1.79 inches.
| Month | Baseline | Rainfall | Category |
|---|---|---|---|
| January | -32.2 mm | 239.8 mm | VERY WET |
| February | -32.2 mm | 172.4 mm | WET |
| March | -32.2 mm | 198.5 mm | WET |
| April | -32.2 mm | 101.2 mm | MODERATE |
| May | -32.2 mm | 72.6 mm | MODERATE |
| June | -32.2 mm | 45.5 mm | LIGHT |
| July | -32.2 mm | 46.9 mm | LIGHT |
| August | -32.2 mm | 48.1 mm | LIGHT |
| September | -32.2 mm | 77.9 mm | MODERATE |
| October | -32.2 mm | 113.9 mm | MODERATE |
| November | -32.2 mm | 195 mm | WET |
| December | -32.2 mm | 218 mm | VERY WET |
December has the strongest peak UV (around index 9.6).
| Month | Baseline | UV Index | Category |
|---|---|---|---|
| January | 0 | 9.6 | VERY HIGH |
| February | 0 | 9.5 | VERY HIGH |
| March | 0 | 8.9 | VERY HIGH |
| April | 0 | 7.7 | HIGH |
| May | 0 | 6.3 | HIGH |
| June | 0 | 5.3 | MODERATE |
| July | 0 | 5.7 | MODERATE |
| August | 0 | 7 | HIGH |
| September | 0 | 8.3 | VERY HIGH |
| October | 0 | 9.2 | VERY HIGH |
| November | 0 | 9.5 | VERY HIGH |
| December | 0 | 9.6 | VERY HIGH |
Daylight ranges from 10.7h in June to 13.5h in December.
| Month | Baseline | Daylight Hours | Category |
|---|---|---|---|
| January | 0h | 13.4h | LONG |
| February | 0h | 12.9h | BALANCED |
| March | 0h | 12.2h | BALANCED |
| April | 0h | 11.6h | BALANCED |
| May | 0h | 11h | BALANCED |
| June | 0h | 10.7h | BALANCED |
| July | 0h | 10.9h | BALANCED |
| August | 0h | 11.3h | BALANCED |
| September | 0h | 12h | BALANCED |
| October | 0h | 12.6h | BALANCED |
| November | 0h | 13.2h | LONG |
| December | 0h | 13.5h | LONG |
May is most humid (81.3%), while September is driest (77%).
| Month | Baseline | Humidity (avg) | Category |
|---|---|---|---|
| January | 75.5% | 79.8% | MUGGY |
| February | 75.5% | 78.9% | MUGGY |
| March | 75.5% | 81.1% | MUGGY |
| April | 75.5% | 81.2% | MUGGY |
| May | 75.5% | 81.3% | MUGGY |
| June | 75.5% | 80.8% | MUGGY |
| July | 75.5% | 79.2% | MUGGY |
| August | 75.5% | 77.3% | MUGGY |
| September | 75.5% | 77% | MUGGY |
| October | 75.5% | 78.7% | MUGGY |
| November | 75.5% | 80.1% | MUGGY |
| December | 75.5% | 80.8% | MUGGY |
September has the strongest typical average wind (7.6 km/h / 4.8 mph), while March is calmest (5.8 km/h / 3.6 mph).
| Month | Baseline | Wind (avg) | Category |
|---|---|---|---|
| January | 5 km/h | 6 km/h | CALM |
| February | 5 km/h | 5.9 km/h | CALM |
| March | 5 km/h | 5.8 km/h | CALM |
| April | 5 km/h | 6.1 km/h | CALM |
| May | 5 km/h | 6.1 km/h | CALM |
| June | 5 km/h | 6.2 km/h | CALM |
| July | 5 km/h | 6.7 km/h | CALM |
| August | 5 km/h | 7.3 km/h | CALM |
| September | 5 km/h | 7.6 km/h | CALM |
| October | 5 km/h | 7.5 km/h | CALM |
| November | 5 km/h | 7.1 km/h | CALM |
| December | 5 km/h | 6.5 km/h | CALM |
September is windiest by P95 gust signal (49.0 km/h / 30.5 mph).
| Month | Baseline | Wind (gusts) | Category |
|---|---|---|---|
| January | 0 km/h | 44.3 km/h | WINDY |
| February | 0 km/h | 42.8 km/h | WINDY |
| March | 0 km/h | 43.2 km/h | WINDY |
| April | 0 km/h | 43.6 km/h | WINDY |
| May | 0 km/h | 42.8 km/h | WINDY |
| June | 0 km/h | 41.4 km/h | WINDY |
| July | 0 km/h | 42.8 km/h | WINDY |
| August | 0 km/h | 48.6 km/h | WINDY |
| September | 0 km/h | 49 km/h | WINDY |
| October | 0 km/h | 49 km/h | WINDY |
| November | 0 km/h | 47.5 km/h | WINDY |
| December | 0 km/h | 46.1 km/h | WINDY |
December has the most rain days (~22.7), while July has the fewest (~9.2). Rain days count the average number of days in a month with measurable rain (about 0.1 mm or more).
| Month | Baseline | Rain Days | Category |
|---|---|---|---|
| January | 3.8 days | 21.8 days | VERY FREQUENT |
| February | 3.8 days | 18.6 days | VERY FREQUENT |
| March | 3.8 days | 22.4 days | VERY FREQUENT |
| April | 3.8 days | 16.4 days | VERY FREQUENT |
| May | 3.8 days | 13.9 days | FREQUENT |
| June | 3.8 days | 9.5 days | FREQUENT |
| July | 3.8 days | 9.2 days | FREQUENT |
| August | 3.8 days | 9.8 days | FREQUENT |
| September | 3.8 days | 12.9 days | FREQUENT |
| October | 3.8 days | 17.2 days | VERY FREQUENT |
| November | 3.8 days | 20.3 days | VERY FREQUENT |
| December | 3.8 days | 22.7 days | VERY FREQUENT |
January has the most heavy rain/washout risk days (~12). Heavy rain days are the average number of days likely to bring stronger downpours that can disrupt outdoor plans.
| Month | Baseline | Heavy Rain Days | Category |
|---|---|---|---|
| January | 0 days | 12 days | PERSISTENT |
| February | 0 days | 10 days | PERSISTENT |
| March | 0 days | 10 days | PERSISTENT |
| April | 0 days | 6 days | PERSISTENT |
| May | 0 days | 4 days | FREQUENT |
| June | 0 days | 3 days | FREQUENT |
| July | 0 days | 3 days | FREQUENT |
| August | 0 days | 3 days | FREQUENT |
| September | 0 days | 5 days | FREQUENT |
| October | 0 days | 6 days | PERSISTENT |
| November | 0 days | 11 days | PERSISTENT |
| December | 0 days | 11 days | PERSISTENT |
February has the highest heat-risk day count (~11 days). Heat days are the average number of days that exceed our location-specific heat-risk threshold.
| Month | Baseline | Heat Days | Category |
|---|---|---|---|
| January | 0 days | 10 days | HIGH |
| February | 0 days | 11 days | SEVERE |
| March | 0 days | 6 days | HIGH |
| April | 0 days | 2 days | ELEVATED |
| May | 0 days | 1 days | LOW |
| June | 0 days | 0 days | LOW |
| July | 0 days | 0 days | LOW |
| August | 0 days | 1 days | LOW |
| September | 0 days | 3 days | ELEVATED |
| October | 0 days | 5 days | ELEVATED |
| November | 0 days | 5 days | ELEVATED |
| December | 0 days | 7 days | HIGH |
Daylight varies from 10.7 hours in June (winter) to 13.5 hours in December (summer), which is a difference of 2.8 hours.
Southern Hemisphere seasons shape the weather patterns throughout the year. Here's what to expect in each season:
| Ranking Goal | #1 | #2 | #3 | #4 |
|---|---|---|---|---|
| Lowest rain risk | Jun 3 risk days | Jul 3 risk days | Aug 3 risk days | May 4 risk days |
| Lowest heatwave risk | Jun 0 risk days | Jul 0 risk days | May 1 risk days | Aug 1 risk days |
| Lowest cold risk | Jan 0 risk days | Feb 0 risk days | Mar 0 risk days | Apr 0 risk days |
| Lowest wind disruption risk | Jun 41 km/h | Feb 43 km/h | May 43 km/h | Jul 43 km/h |
| Most comfortable evenings | Jul 83 / 100 | Aug 81 / 100 | Jun 78 / 100 | May 68 / 100 |
| Best outdoor reliability | Jun 100 / 100 | Jul 96 / 100 | May 88 / 100 | Aug 78 / 100 |
Click any month for detailed weather information and packing advice.
Get personalized month rankings based on weather comfort, outdoor activity suitability, and seasonal conditions.
View Best Time to VisitThe best months to visit Rio de Janeiro depend on your preferences. For warm weather, February is typically the warmest month. For dry conditions, June, July, August tend to have the least rainfall. Consider your priorities, and whether you prefer warmer temperatures, drier weather, or longer daylight hours.
February is typically the warmest month in Rio de Janeiro, with average high temperatures reaching around 31°C (88°F). This is peak summer weather, ideal for outdoor activities and sightseeing.
July is usually the coldest month, with average low temperatures dropping to around 17°C (63°F). Pack warm layers if visiting during this time, especially for evening activities.
January typically sees the most rainfall in Rio de Janeiro, averaging around 240mm (9.4 inches). It's wise to pack waterproof layers and have some indoor backup plans if you're visiting during this month.
June is typically the driest month, with average rainfall of just 46mm (1.8 inches). This makes it an excellent time for outdoor exploration and activities with minimal risk of rain disruption.
Temperatures in Rio de Janeiro range from average lows of 21°C (69°F) to highs of 28°C (82°F). This variation means you'll want to pack differently depending on when you visit, as layers are key for adapting to the seasonal changes.
Yes, sun protection is important in Rio de Janeiro. UV levels can reach 10 during peak months, which is considered very high. Pack sunscreen (SPF 30+), sunglasses, and a hat, especially if you'll be outdoors for extended periods.