Last updated: August 23, 2025
In May, the average temperature in Charlestown, Ireland hovers around 11°C (53°F). You can expect a minimum of -1°C (30°F) on cooler days, while the mercury can rise to a maximum of 25°C (77°F) during warmer spells. Be prepared for some rain, as 82 mm (3.2 in) of precipitation is likely over 14 days. With an average humidity of 83%, it’s a month where you might want to keep your umbrella handy!
In May in Charlestown, the average temperature is 11°C (53°F), with maximums reaching up to 25°C (77°F) and minimums dropping as low as -1°C (30°F). Travelers should be prepared for a wide range of temperatures, making layered clothing a wise choice.
In Charlestown in May, the precipitation amount is 82 mm (3.2 in) spread over 14 days.
In Charlestown in May, humidity is 83%. With an average temperature of 11°C (53°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and causing an inevitable sheen of sweat to form, which can dampen the joy of exploring your surroundings.
In Charlestown in May, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Charlestown.
UV Risk Categories
Weather in Charlestown varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Charlestown, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 6°C (42°F) | 79 mm (3.1 inches) | 88% | low |
| February Weather | 6°C (43°F) | 124 mm (4.9 inches) | 88% | low |
| March Weather | 6°C (44°F) | 107 mm (4.2 inches) | 87% | moderate |
| April Weather | 9°C (48°F) | 65 mm (2.6 inches) | 86% | moderate |
| May Weather | 11°C (53°F) | 82 mm (3.2 inches) | 83% | high |
| June Weather | 13°C (56°F) | 98 mm (3.8 inches) | 83% | very high |
| July Weather | 15°C (59°F) | 96 mm (3.8 inches) | 85% | very high |
| August Weather | 15°C (59°F) | 147 mm (5.8 inches) | 85% | high |
| September Weather | 13°C (55°F) | 90 mm (3.5 inches) | 88% | moderate |
| October Weather | 10°C (50°F) | 120 mm (4.7 inches) | 91% | moderate |
| November Weather | 8°C (46°F) | 104 mm (4.1 inches) | 92% | low |
| December Weather | 6°C (44°F) | 109 mm (4.3 inches) | 89% | low |