Last updated: March 2, 2024
The weather in Kalmthout, Belgium, during September is characterized by an average temperature of 15°C (60°F). Highs can soar to 27°C (81°F), while lows may dip to 5°C (42°F). Typically, the humidity level in Kalmthout throughout September hovers around 82%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Kalmthout averages 61 mm (2.4 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 12 hours 34 minutes of daylight, with the sun shining for approximately 10 hours 57 minutes each day. Additionally, there is a 32% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in Kalmthout reaches a maximum of 5, 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 | 3 | 5 | 5 | 5 | 5 | 4 | 2 | 1 | 1 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||