Last updated: June 24, 2025
In Londonderry, United States, the average temperature in May is a comfortable 15°C (59°F). However, be prepared for a range, as temperatures can drop to a chilly 2°C (35°F) or soar to a scorching 35°C (95°F). During this month, expect about 82 mm (3.2 in) of precipitation over 10 days, contributing to an average humidity of 72%. Whether you’re planning outdoor activities or cozy indoor moments, be ready for this dynamic weather!
In May in Londonderry, the average temperature is 15°C (59°F). The maximum can reach 35°C (95°F), and the minimum can be as low as 2°C (35°F). Be prepared for a wide temperature range, making it essential to pack both warm and light clothing for your travels.
In Londonderry in May, the total precipitation amount is 82 mm (3.2 in) observed over a span of 10 days.
In Londonderry in May humidity is 72%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket wrapping around you, creating a sultry atmosphere that can make traveling a bit uncomfortable. The stickiness in the air can leave you feeling sluggish, so it’s advisable to stay hydrated and take breaks often while exploring.
In Londonderry in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Londonderry.
UV Risk Categories
Weather in Londonderry varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Londonderry, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 68 mm (2.7 inches) | 86% | low |
| February Weather | 0°C (32°F) | 84 mm (3.3 inches) | 84% | moderate |
| March Weather | 3°C (37°F) | 85 mm (3.3 inches) | 82% | moderate |
| April Weather | 9°C (48°F) | 127 mm (5.0 inches) | 80% | very high |
| May Weather | 15°C (59°F) | 82 mm (3.2 inches) | 72% | very high |
| June Weather | 20°C (69°F) | 89 mm (3.5 inches) | 72% | very high |
| July Weather | 23°C (74°F) | 131 mm (5.2 inches) | 67% | very high |
| August Weather | 23°C (74°F) | 77 mm (3.0 inches) | 66% | very high |
| September Weather | 19°C (66°F) | 73 mm (2.9 inches) | 71% | high |
| October Weather | 13°C (55°F) | 128 mm (5.0 inches) | 78% | high |
| November Weather | 5°C (42°F) | 95 mm (3.7 inches) | 84% | moderate |
| December Weather | 0°C (32°F) | 121 mm (4.8 inches) | 81% | low |