Last updated: August 22, 2025
In December, the average temperature in Viana, Brazil hovers around 25°C (77°F), providing a pleasant climate for outdoor activities. You'll experience minimum temperatures as low as 18°C (65°F) and maximums reaching up to 32°C (91°F). However, be prepared for some rainy days; with an average precipitation of 188 mm (7.4 in) spread across 15 days, it’s wise to carry an umbrella. The average humidity level sits at a comfortable 72%, adding a touch of tropical warmth to the air.
In December in Viana, the average temperature is 25°C (77°F). The maximum can reach 32°C (91°F) and the minimum can be as low as 18°C (65°F). This makes Viana an ideal destination for travelers seeking warm and pleasant weather.
In Viana in December, the precipitation amount is 188 mm (7.4 in) over the course of 15 days.
In Viana in December, humidity is 72%. With an average temperature of 25°C (77°F), this humidity feels like a warm embrace that clings to your skin, making outdoor exploration both vibrant and a bit taxing as you sweat slightly more and seek shade often while enjoying the scenery.
In Viana in December, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Viana.
UV Risk Categories
Weather in Viana varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Viana, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 26°C (80°F) | 76 mm (3.0 inches) | 80% | extreme |
| February Weather | 26°C (79°F) | 176 mm (6.9 inches) | 85% | extreme |
| March Weather | 26°C (79°F) | 131 mm (5.2 inches) | 86% | extreme |
| April Weather | 24°C (76°F) | 120 mm (4.7 inches) | 85% | extreme |
| May Weather | 22°C (73°F) | 76 mm (3.0 inches) | 82% | very high |
| June Weather | 22°C (72°F) | 44 mm (1.7 inches) | 81% | high |
| July Weather | 21°C (69°F) | 31 mm (1.2 inches) | 79% | very high |
| August Weather | 21°C (70°F) | 57 mm (2.2 inches) | 75% | very high |
| September Weather | 23°C (73°F) | 65 mm (2.6 inches) | 72% | extreme |
| October Weather | 23°C (75°F) | 123 mm (4.8 inches) | 66% | extreme |
| November Weather | 24°C (75°F) | 185 mm (7.3 inches) | 69% | extreme |
| December Weather | 25°C (77°F) | 188 mm (7.4 inches) | 72% | extreme |