Last updated: March 2, 2024
The weather in Spa, Belgium, during May is characterized by an average temperature of 12°C (55°F). Highs can soar to 26°C (79°F), while lows may dip to 1°C (34°F). Typically, the humidity level in Spa throughout May hovers around 77%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In May, Spa averages 81 mm (3.2 inches) of rainfall, typically over the course of 15 rainy days. The month enjoys an average of 15 hours 30 minutes of daylight, with the sun shining for approximately 12 hours 46 minutes each day. Additionally, there is a 30% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In May, the UV Index in Spa reaches a maximum of 8, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 15 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 | 2 | 4 | 5 | 7 | 8 | 7 | 7 | 5 | 4 | 2 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 25 min | 30 min | 45 min | ||||||