Last updated: August 23, 2025
In September, the average temperature in Kuusjoki, Finland hovers around 11°C (53°F). Expect a minimum drop to -3°C (26°F) while the maximum can reach up to 23°C (74°F). Keep an umbrella handy as precipitation measures about 59 mm (2.3 in) over approximately 12 days, and be prepared for a muggy ambiance with an average humidity of 90%.
In September in Kuusjoki, the average temperature is 11°C (53°F). The maximum can reach 23°C (74°F), and the minimum can be as low as -3°C (26°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack both warm and light clothing for their visit.
In Kuusjoki in September, the precipitation amount is 59 mm (2.3 in) occurring over the course of 12 days.
In Kuusjoki in September, humidity is 90%. With an average temperature of 11°C (53°F), this humidity feels like a heavy cloak, making traveling feel sticky and exhausting, as the dampness clings to your skin and the chill in the air sharpens the discomfort, leaving you longing for a breath of fresh, dry air.
In Kuusjoki in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Kuusjoki for better planning.
UV Risk Categories
Weather in Kuusjoki varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kuusjoki, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (27°F) | 51 mm (2.0 inches) | 97% | low |
| February Weather | -4°C (25°F) | 44 mm (1.7 inches) | 95% | low |
| March Weather | -1°C (31°F) | 48 mm (1.9 inches) | 93% | moderate |
| April Weather | 4°C (39°F) | 38 mm (1.5 inches) | 86% | moderate |
| May Weather | 10°C (50°F) | 56 mm (2.2 inches) | 75% | moderate |
| June Weather | 16°C (62°F) | 52 mm (2.1 inches) | 75% | high |
| July Weather | 18°C (64°F) | 79 mm (3.1 inches) | 80% | high |
| August Weather | 16°C (61°F) | 85 mm (3.3 inches) | 83% | moderate |
| September Weather | 11°C (53°F) | 59 mm (2.3 inches) | 90% | moderate |
| October Weather | 6°C (44°F) | 78 mm (3.1 inches) | 93% | low |
| November Weather | 3°C (37°F) | 53 mm (2.1 inches) | 94% | low |
| December Weather | -1°C (30°F) | 68 mm (2.7 inches) | 95% | low |