Last updated: March 2, 2024
The weather in Karhula, Finland, during September is characterized by an average temperature of 12°C (54°F). Highs can soar to 20°C (68°F), while lows may dip to 3°C (39°F). Typically, the humidity level in Karhula throughout September hovers around 90%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Karhula averages 66 mm (2.6 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 12 hours 48 minutes of daylight, with the sun shining for approximately 9 hours 50 minutes each day. Additionally, there is a 23% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In September, the UV Index in Karhula 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 | 1 | 1 | 1 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||