Last updated: August 23, 2025
In January, the average temperature in Osny, France hovers around 5°C (40°F). Expect chilly nights as temperatures can dip to a brisk -7°C (20°F), while the day may warm up to a pleasant 15°C (58°F). Precipitation is moderate, with 54 mm (2.1 in) falling over approximately 10 days, and the air often feels quite damp with an average humidity of 91%. Whether you're layering up or braving the drizzle, be prepared for a true taste of the season!
In January in Osny, the average temperature is 5°C (40°F). Maximums can reach 15°C (58°F), while minimums can drop to as low as -7°C (20°F). Be prepared for a mix of chilly and milder days if you're planning to travel during this time.
In Osny in January, the total precipitation amount is 54 mm (2.1 in) over the course of 10 days.
In Osny in January humidity is 91%. With an average temperature of 5°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and necessitating warm, layered clothing to stay comfortable while exploring.
In Osny in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Osny, you can visit Hourly UV Index in Osny.
UV Risk Categories
Weather in Osny varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Osny, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 5°C (40°F) | 54 mm (2.1 inches) | 91% | low |
February Weather | 6°C (43°F) | 67 mm (2.6 inches) | 89% | moderate |
March Weather | 8°C (47°F) | 76 mm (3.0 inches) | 85% | moderate |
April Weather | 11°C (52°F) | 36 mm (1.4 inches) | 84% | high |
May Weather | 14°C (57°F) | 73 mm (2.9 inches) | 82% | very high |
June Weather | 18°C (65°F) | 79 mm (3.1 inches) | 80% | very high |
July Weather | 20°C (68°F) | 47 mm (1.8 inches) | 73% | very high |
August Weather | 19°C (67°F) | 58 mm (2.3 inches) | 68% | very high |
September Weather | 16°C (62°F) | 41 mm (1.6 inches) | 76% | high |
October Weather | 13°C (55°F) | 77 mm (3.0 inches) | 88% | moderate |
November Weather | 8°C (46°F) | 65 mm (2.6 inches) | 92% | low |
December Weather | 6°C (43°F) | 101 mm (4.0 inches) | 93% | low |