Last updated: March 2, 2024
The weather in Uusikaupunki, Finland, during September is characterized by an average temperature of 13°C (55°F). Highs can soar to 20°C (69°F), while lows may dip to 4°C (39°F). Typically, the humidity level in Uusikaupunki throughout September hovers around 86%.
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Humidity
In September, Uusikaupunki averages 71 mm (2.8 inches) of rainfall, typically over the course of 12 rainy days. The month enjoys an average of 12 hours 49 minutes of daylight, with the sun shining for approximately 10 hours 21 minutes each day. Additionally, there is a 32% probability of sunny days during this period.
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In September, the UV Index in Uusikaupunki reaches a maximum of 4, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, 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 | 4 | 3 | 3 | 2 | 2 | 1 | 1 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||