Last updated: June 24, 2025
In January, the average temperature in Rio, United States hovers around -6°C (21°F). While the mercury can plunge to a chilling -33°C (-27°F), it may occasionally reach a balmy 10°C (50°F). During this time, expect about 47 mm (1.9 in) of precipitation over 7 days, coupled with an average humidity of a brisk 85%. Stay warm and prepared for a wintery experience!
In January, in Rio, the average temperature is -6°C (21°F). The maximum can reach 10°C (50°F) and the minimum can be as low as -33°C (-27°F). Travelers should prepare for cold weather conditions and pack accordingly for their visit.
In Rio in January, the total precipitation amount is 47 mm (1.9 in) recorded over a span of 7 days.
In Rio in January, humidity is 85%. With an average temperature of -6°C (21°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and forcing you to bundle up even more than usual as you navigate through frosty air.
In Rio in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Rio, you can check the information here.
UV Risk Categories
Weather in Rio varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Rio, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -6°C (21°F) | 47 mm (1.9 inches) | 85% | moderate |
February Weather | -6°C (21°F) | 52 mm (2.0 inches) | 85% | moderate |
March Weather | 2°C (35°F) | 58 mm (2.3 inches) | 85% | moderate |
April Weather | 7°C (45°F) | 98 mm (3.9 inches) | 85% | very high |
May Weather | 15°C (59°F) | 127 mm (5.0 inches) | 78% | very high |
June Weather | 21°C (70°F) | 112 mm (4.4 inches) | 80% | very high |
July Weather | 23°C (74°F) | 103 mm (4.1 inches) | 78% | very high |
August Weather | 22°C (71°F) | 100 mm (3.9 inches) | 76% | very high |
September Weather | 18°C (65°F) | 98 mm (3.8 inches) | 79% | high |
October Weather | 10°C (51°F) | 113 mm (4.5 inches) | 83% | moderate |
November Weather | 2°C (36°F) | 44 mm (1.7 inches) | 88% | moderate |
December Weather | -2°C (28°F) | 46 mm (1.8 inches) | 81% | low |