Last updated: March 2, 2024
The weather in Belfast, United Kingdom, during May is characterized by an average temperature of 11°C (52°F). Highs can soar to 19°C (67°F), while lows may dip to 3°C (38°F). Typically, the humidity level in Belfast throughout May hovers around 82%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In May, Belfast averages 66 mm (2.6 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 16 hours 5 minutes of daylight, with the sun shining for approximately 12 hours 59 minutes each day. Additionally, there is a 33% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In May, the UV Index in Belfast reaches a maximum of 7, indicating a level of High exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 25 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 | 2 | 3 | 4 | 5 | 6 | 7 | 6 | 6 | 4 | 3 | 2 | 1 |
| Exposure | Low | Moderate | High | Moderate | Low | ||||||||
| Time to burn | 45 min | 30 min | 25 min | 30 min | 45 min | ||||||||