Last updated: August 23, 2025
In Polvijaervi, Finland, the average temperature in September hovers around 10°C (50°F), with a range that can dip to a chilly 0°C (32°F) and peak at a pleasant 22°C (72°F). During this month, residents and visitors can expect about 89 mm (3.5 in) of precipitation over 14 days, leading to a notably high average humidity of 92%. Be prepared for a mix of cool weather and occasional showers!
In September in Polvijaervi, 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 Polvijaervi in September, the precipitation amount is 89 mm (3.5 in) over a span of 14 days.
In Polvijaervi 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 Polvijaervi 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 Polvijaervi, you can check the information here.
UV Risk Categories
Weather in Polvijaervi varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Polvijaervi, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (20°F) | 50 mm (2.0 inches) | 99% | low |
| February Weather | -7°C (19°F) | 48 mm (1.9 inches) | 98% | low |
| March Weather | -3°C (26°F) | 51 mm (2.0 inches) | 95% | moderate |
| April Weather | 1°C (35°F) | 42 mm (1.6 inches) | 87% | moderate |
| May Weather | 8°C (47°F) | 61 mm (2.4 inches) | 78% | moderate |
| June Weather | 15°C (60°F) | 68 mm (2.7 inches) | 75% | high |
| July Weather | 17°C (63°F) | 88 mm (3.5 inches) | 83% | high |
| August Weather | 15°C (60°F) | 93 mm (3.7 inches) | 88% | moderate |
| September Weather | 10°C (50°F) | 89 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) | 69 mm (2.7 inches) | 94% | low |
| December Weather | -4°C (25°F) | 73 mm (2.9 inches) | 98% | low |