Last updated: March 2, 2024
The weather in Katwijk aan den Rijn, Netherlands, during September is characterized by an average temperature of 16°C (61°F). Highs can soar to 24°C (76°F), while lows may dip to 9°C (49°F). Typically, the humidity level in Katwijk aan den Rijn throughout September hovers around 83%.
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Humidity
In September, Katwijk aan den Rijn averages 96 mm (3.8 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 12 hours 36 minutes of daylight, with the sun shining for approximately 11 hours 1 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 Katwijk aan den Rijn reaches a maximum of 5, 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 | 4 | 5 | 5 | 5 | 4 | 2 | 1 | 1 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||