Last updated: August 23, 2025
In Tuusniemi, Finland, the average temperature in September hovers around 10°C (50°F). Expect temperatures to range from a chilly 0°C (32°F) to a mild 22°C (72°F). During this time, precipitation can reach up to 88 mm (3.5 in), spread over about 14 days. This period also features a high average humidity of 92%, contributing to the overall atmospheric feel.
In September in Tuusniemi, the average temperature is 10°C (50°F). The maximum can reach 22°C (72°F), while the minimum can be as low as 0°C (32°F). It's a great time to visit if you enjoy mild weather and the possibility of layering your clothing for comfort.
In Tuusniemi in September, the precipitation amount is 88 mm (3.5 in) over the course of 14 days.
In Tuusniemi in September humidity is 92%. With an average temperature of 10°C (50°F), this humidity feels like a chilly, damp cloak wrapping around you, making every step outside feel heavy and each breath a bit more labored, turning exploring into an uncomfortable challenge.
In Tuusniemi in September, 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 Tuusniemi, you can check the information here.
UV Risk Categories
Weather in Tuusniemi varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Tuusniemi, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (21°F) | 50 mm (1.9 inches) | 99% | low |
| February Weather | -7°C (20°F) | 45 mm (1.8 inches) | 98% | low |
| March Weather | -3°C (26°F) | 47 mm (1.9 inches) | 95% | moderate |
| April Weather | 2°C (35°F) | 42 mm (1.7 inches) | 87% | moderate |
| May Weather | 8°C (47°F) | 63 mm (2.5 inches) | 78% | moderate |
| June Weather | 15°C (60°F) | 73 mm (2.9 inches) | 75% | high |
| July Weather | 17°C (63°F) | 83 mm (3.3 inches) | 83% | high |
| August Weather | 15°C (60°F) | 94 mm (3.7 inches) | 88% | moderate |
| September Weather | 10°C (50°F) | 88 mm (3.5 inches) | 92% | moderate |
| October Weather | 5°C (41°F) | 86 mm (3.4 inches) | 95% | low |
| November Weather | 0°C (33°F) | 72 mm (2.9 inches) | 94% | low |
| December Weather | -4°C (25°F) | 71 mm (2.8 inches) | 98% | low |