Last updated: March 2, 2024
The weather in Ilomantsi, Finland, during September is characterized by an average temperature of 9°C (49°F). Highs can soar to 19°C (67°F), while lows may dip to -1°C (31°F). Typically, the humidity level in Ilomantsi throughout September hovers around 91%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Ilomantsi averages 78 mm (3.1 inches) of rainfall, typically over the course of 14 rainy days. The month enjoys an average of 12 hours 53 minutes of daylight, with the sun shining for approximately 8 hours 24 minutes each day. Additionally, there is a 21% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Ilomantsi reaches a maximum of 3, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 30 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 1 | 1 | 2 | 3 | 3 | 3 | 3 | 2 | 2 | 1 | 1 | 1 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||