Last updated: March 2, 2024
The weather in Porthmadog, 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 4°C (39°F). Typically, the humidity level in Porthmadog throughout May hovers around 79%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In May, Porthmadog averages 87 mm (3.4 inches) of rainfall, typically over the course of 12 rainy days. The month enjoys an average of 15 hours 51 minutes of daylight, with the sun shining for approximately 13 hours 23 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 Porthmadog reaches a maximum of 7, indicating a level of High exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, 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 | 7 | 7 | 7 | 6 | 4 | 3 | 2 | 1 |
| Exposure | Low | Moderate | High | Moderate | Low | ||||||||
| Time to burn | 45 min | 30 min | 25 min | 30 min | 45 min | ||||||||