Last updated: August 22, 2025
In December, the average temperature in Porto Uniao, Brazil is a pleasant 21°C (70°F). Be prepared for a range in temperatures, with minima dipping to 9°C (48°F) and maxima reaching up to 33°C (91°F). Rainfall is quite common, with 133 mm (5.2 in) of precipitation expected over 18 days, resulting in an average humidity of 88%. Stay hydrated and enjoy the lush atmosphere!
In December in Porto Uniao, the average temperature is 21°C (70°F), with maximums reaching up to 33°C (91°F) and minimums dropping as low as 9°C (48°F). This pleasant temperature range makes Porto Uniao an ideal destination for travelers seeking comfortable weather.
In Porto Uniao in December, the precipitation amount is 133 mm (5.2 in) over a span of 18 days.
In Porto Uniao in December, humidity is 88%. With an average temperature of 21°C (70°F), this humidity feels like a thick blanket enveloping you, making every step feel heavier and slightly stifling, which can be quite challenging for travelers.
In Porto Uniao 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 Porto Uniao.
UV Risk Categories
Weather in Porto Uniao varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Porto Uniao, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 21°C (70°F) | 143 mm (5.6 inches) | 85% | extreme |
| February Weather | 21°C (70°F) | 102 mm (4.0 inches) | 81% | extreme |
| March Weather | 20°C (69°F) | 99 mm (3.9 inches) | 82% | extreme |
| April Weather | 17°C (64°F) | 56 mm (2.2 inches) | 84% | extreme |
| May Weather | 15°C (59°F) | 82 mm (3.2 inches) | 86% | high |
| June Weather | 14°C (57°F) | 95 mm (3.7 inches) | 84% | high |
| July Weather | 13°C (55°F) | 25 mm (1.0 inches) | 77% | high |
| August Weather | 14°C (57°F) | 75 mm (3.0 inches) | 70% | very high |
| September Weather | 18°C (64°F) | 71 mm (2.8 inches) | 75% | extreme |
| October Weather | 18°C (64°F) | 140 mm (5.5 inches) | 76% | extreme |
| November Weather | 19°C (67°F) | 115 mm (4.5 inches) | 84% | extreme |
| December Weather | 21°C (70°F) | 133 mm (5.2 inches) | 88% | extreme |