Last updated: March 2, 2024
The weather in Sumiainen, Finland, during September is characterized by an average temperature of 10°C (50°F). Highs can soar to 19°C (66°F), while lows may dip to 1°C (35°F). Typically, the humidity level in Sumiainen throughout September hovers around 91%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Sumiainen averages 80 mm (3.2 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 12 hours 53 minutes of daylight, with the sun shining for approximately 8 hours 4 minutes each day. Additionally, there is a 24% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Sumiainen reaches a maximum of 3, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, 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 | 2 | 3 | 3 | 3 | 3 | 2 | 1 | 1 | 1 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||