Weather in South America for May 2025
Expect cooler weather in first days of May 2025 in South America with the forecast suggesting a temperature of 25.8 °C, lower than the historical average.
In general, the average temperature in South America at the beginning of May is 25.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 24.6 °C by the end of May.
The climate of South America in May is notably wet, with an average of 12 rainy days, and a total of 73.9 mm of precipitation.
Temperatures
Rain 🌧️
South America Weather May
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  24° | 2  25° | 3 26° | 4 26° | |||
| 5 25° | 6 26° | 7 29° | 8 31° | 9 33° | 10 26° | 11 22° |
| 12  27° | 13 28° | 14  25° | 15 24° | 16 27° | 17 28° | 18  26° |
| 19 26° | 20 27° | 21  26° | 22 28° | 23 29° | 24 29° | 25 26° |
| 26 24° | 27 27° | 28 28° | 29 22° | 30 23° | 31 22° |
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Temperatures trend during May in South America
May weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May | Patchy rain possible | 24° /19° | 0.7 mm | 1.3 | |
| 2 May | Sunny | 25° /20° | 0.1 mm | 0.4 | |
| 3 May | Sunny | 26° /19° | 0 mm | 7 | |
| 4 May | Patchy rain possible | 26° /21° | 0.4 mm | 6 | |
| 5 May | Patchy rain possible | 25° /21° | 0.1 mm | 6 | |
| 6 May | Sunny | 26° /20° | 0 mm | 7 | |
| 7 May | Sunny | 29° /20° | 0 mm | 7 | |
| 8 May | Sunny | 31° /21° | 0 mm | 8 | |
| 9 May | Patchy rain possible | 33° /23° | 0.3 mm | 7 | |
| 10 May | Patchy rain possible | 26° /22° | 3.8 mm | 6 | |
| 11 May | Patchy rain possible | 22° /21° | 1.8 mm | 6 | |
| 12 May | Moderate rain at times | 27° /21° | 2.2 mm | 7 | |
| 13 May | Moderate rain at times | 28° /21° | 1.9 mm | 7 | |
| 14 May | Cloudy | 25° /20° | 0.4 mm | 6 | |
| 15 May | Sunny | 24° /19° | 2.6 mm | 6 | |
| 16 May | Sunny | 27° /18° | 0.1 mm | 7 | |
| 17 May | Patchy rain possible | 28° /20° | 0.6 mm | 7 | |
| 18 May | Overcast | 26° /20° | 0.1 mm | 7 | |
| 19 May | Sunny | 26° /19° | 0 mm | 7 | |
| 20 May | Sunny | 27° /18° | 0 mm | 8 | |
| 21 May | Partly cloudy | 26° /18° | 1.8 mm | 7 | |
| 22 May | Cloudy | 28° /18° | 0 mm | 7 | |
| 23 May | Sunny | 29° /19° | 0 mm | 8 | |
| 24 May | Partly cloudy | 29° /20° | 0 mm | 8 | |
| 25 May | Sunny | 26° /19° | 1.6 mm | 7 | |
| 26 May | Sunny | 24° /18° | 16.2 mm | 7 | |
| 27 May | Sunny | 27° /19° | 6.7 mm | 7 | |
| 28 May | Sunny | 28° /19° | 2.8 mm | 7 | |
| 29 May | Moderate or heavy rain shower | 22° /19° | 21.7 mm | 6 | |
| 30 May | Patchy rain possible | 23° /19° | 0.2 mm | 6 | |
| 31 May | Moderate or heavy rain shower | 22° /18° | 5.3 mm | 6 | |
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Guide for South America in May
In May, Rio de Janeiro experiences a transition from the warm, humid conditions of autumn to the cooler, drier weather of winter. At the beginning of the month, the average temperature hovers around 25°, with occasional showers and high humidity.
As the month progresses, the temperature gradually decreases to around 23°, and the humidity levels begin to drop. By the end of May, Rio de Janeiro enjoys more comfortable weather, with cooler evenings and pleasant daytime temperatures.
The city experiences an average of 7 hours of sunshine per day throughout May, providing ample opportunity for outdoor activities and sightseeing. However, visitors should be prepared for sporadic rain showers, especially in the first half of the month.
The sea temperature remains relatively warm, making it suitable for beach activities and water sports.
Overall, May in Rio de Janeiro offers a mix of warm days, occasional rain showers, and comfortable evenings, making it an ideal time to explore the city's vibrant culture, beautiful beaches, and stunning natural landscapes.
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South America in May - FAQ
May rainfall patterns in South America
UV exposure in South America during May
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Where is South America?Get accurate weather forecasts for South America, located at latitude -22.906 and longitude -43.182. Stay updated with localized weather information tailored for South America.